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Zhu Y, Yu Y, Cheng K, Ouyang Y, Wang J, Gong L, Zhang Q, Li X, Xiao J, Zhang Q. Processes Underlying a Reproductive Barrier in indica- japonica Rice Hybrids Revealed by Transcriptome Analysis. PLANT PHYSIOLOGY 2017; 174:1683-1696. [PMID: 28483876 PMCID: PMC5490891 DOI: 10.1104/pp.17.00093] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 05/04/2017] [Indexed: 05/13/2023]
Abstract
In rice (Oryza sativa), hybrids between indica and japonica subspecies are usually highly sterile, which provides a model system for studying postzygotic reproductive isolation. A killer-protector system, S5, composed of three adjacent genes (ORF3, ORF4, and ORF5), regulates female gamete fertility of indica-japonica hybrids. To characterize the processes underlying this system, we performed transcriptomic analyses of pistils from rice variety Balilla (BL), Balilla with transformed ORF5+ (BL5+) producing sterile female gametes, and Balilla with transformed ORF3+ and ORF5+ (BL3+5+) producing fertile gametes. RNA sequencing of tissues collected before (MMC), during (MEI), and after (AME) meiosis of the megaspore mother cell detected 19,269 to 20,928 genes as expressed. Comparison between BL5+ and BL showed that ORF5+ induced differential expression of 8,339, 6,278, and 530 genes at MMC, MEI, and AME, respectively. At MMC, large-scale differential expression of cell wall-modifying genes and biotic and abiotic response genes indicated that cell wall integrity damage induced severe biotic and abiotic stresses. The processes continued to MEI and induced endoplasmic reticulum (ER) stress as indicated by differential expression of ER stress-responsive genes, leading to programmed cell death at MEI and AME, resulting in abortive female gametes. In the BL3+5+/BL comparison, 3,986, 749, and 370 genes were differentially expressed at MMC, MEI, and AME, respectively. Large numbers of cell wall modification and biotic and abiotic response genes were also induced at MMC but largely suppressed at MEI without inducing ER stress and programed cell death , producing fertile gametes. These results have general implications for the understanding of biological processes underlying reproductive barriers.
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Affiliation(s)
- Yanfen Zhu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Yiming Yu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Ke Cheng
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Yidan Ouyang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Jia Wang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Liang Gong
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Qinghua Zhang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Xianghua Li
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Jinghua Xiao
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Qifa Zhang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
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152
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THOMAS J, IDRIS N, COLLINGS D. Pontamine fast scarlet 4B bifluorescence and measurements of cellulose microfibril angles. J Microsc 2017; 268:13-27. [DOI: 10.1111/jmi.12582] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/23/2017] [Accepted: 04/26/2017] [Indexed: 02/06/2023]
Affiliation(s)
- J. THOMAS
- School of Biological Sciences; The University of Canterbury; Christchurch New Zealand
- Central Wood Testing Laboratory; The Rubber Board; Kottayam Kerala India
| | - N.A. IDRIS
- School of Biological Sciences; The University of Canterbury; Christchurch New Zealand
- School of Fundamental Sciences; Universiti Malaysia Terengganu; Kuala Nerus Kuala Terengganu Terengganu Malaysia
| | - D.A. COLLINGS
- School of Biological Sciences; The University of Canterbury; Christchurch New Zealand
- School of Environmental and Life Sciences; The University of Newcastle; Callaghan NSW Australia
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153
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Voiniciuc C. Whole-seed Immunolabeling of Arabidopsis Mucilage Polysaccharides. Bio Protoc 2017; 7:e2323. [PMID: 34541085 DOI: 10.21769/bioprotoc.2323] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 01/27/2017] [Accepted: 05/07/2017] [Indexed: 11/02/2022] Open
Abstract
In addition to synthesizing and secreting copious amounts of pectic polymers ( Young et al., 2008 ), Arabidopsis thaliana seed coat epidermal cells produce small amounts of cellulose and hemicelluloses typical of secondary cell walls ( Voiniciuc et al., 2015c ). These components are intricately linked and are released as a large mucilage capsule upon hydration of mature seeds. Alterations in the structure of minor mucilage components can have dramatic effects on the architecture of this gelatinous cell wall. The immunolabeling protocol described here makes it possible to visualize the distribution of specific polysaccharides in the seed mucilage capsule.
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Affiliation(s)
- Cătălin Voiniciuc
- Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum Jülich, Jülich, Germany.,Present address: Institute for Plant Cell Biology and Biotechnology, Heinrich Heine University, Düsseldorf, Germany
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154
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Leng Y, Yang Y, Ren D, Huang L, Dai L, Wang Y, Chen L, Tu Z, Gao Y, Li X, Zhu L, Hu J, Zhang G, Gao Z, Guo L, Kong Z, Lin Y, Qian Q, Zeng D. A Rice PECTATE LYASE-LIKE Gene Is Required for Plant Growth and Leaf Senescence. PLANT PHYSIOLOGY 2017; 174:1151-1166. [PMID: 28455404 PMCID: PMC5462006 DOI: 10.1104/pp.16.01625] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 04/13/2017] [Indexed: 05/18/2023]
Abstract
To better understand the molecular mechanisms behind plant growth and leaf senescence in monocot plants, we identified a mutant exhibiting dwarfism and an early-senescence leaf phenotype, termed dwarf and early-senescence leaf1 (del1). Histological analysis showed that the abnormal growth was caused by a reduction in cell number. Further investigation revealed that the decline in cell number in del1 was affected by the cell cycle. Physiological analysis, transmission electron microscopy, and TUNEL assays showed that leaf senescence was triggered by the accumulation of reactive oxygen species. The DEL1 gene was cloned using a map-based approach. It was shown to encode a pectate lyase (PEL) precursor that contains a PelC domain. DEL1 contains all the conserved residues of PEL and has strong similarity with plant PelC. DEL1 is expressed in all tissues but predominantly in elongating tissues. Functional analysis revealed that mutation of DEL1 decreased the total PEL enzymatic activity, increased the degree of methylesterified homogalacturonan, and altered the cell wall composition and structure. In addition, transcriptome assay revealed that a set of cell wall function- and senescence-related gene expression was altered in del1 plants. Our research indicates that DEL1 is involved in both the maintenance of normal cell division and the induction of leaf senescence. These findings reveal a new molecular mechanism for plant growth and leaf senescence mediated by PECTATE LYASE-LIKE genes.
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Affiliation(s)
- Yujia Leng
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Yaolong Yang
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Deyong Ren
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Lichao Huang
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Liping Dai
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Yuqiong Wang
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Long Chen
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Zhengjun Tu
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Yihong Gao
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Xueyong Li
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Li Zhu
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Jiang Hu
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Guangheng Zhang
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Zhenyu Gao
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Longbiao Guo
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Zhaosheng Kong
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Yongjun Lin
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.)
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.)
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Qian Qian
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.),
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.),
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
| | - Dali Zeng
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.),
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.),
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and
- Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
- State Key Lab for Rice Biology, China National Rice Research Institute, Hangzhou 310006, China (Yu.L., Y.Y., D.R., L.H., L.D., Y.W., L.C., Z.T., Y.G., L.Z., J.H., G.Z., Z.G., L.G., Q.Q., D.Z.), National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China (Yu.L., L.D., L.C., Yo.L.), National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China (X.L.), and Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Plant Genomics, Beijing 100101, China (Z.K.)
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Mravec J, Guo X, Hansen AR, Schückel J, Kračun SK, Mikkelsen MD, Mouille G, Johansen IE, Ulvskov P, Domozych DS, Willats WGT. Pea Border Cell Maturation and Release Involve Complex Cell Wall Structural Dynamics. PLANT PHYSIOLOGY 2017; 174:1051-1066. [PMID: 28400496 PMCID: PMC5462005 DOI: 10.1104/pp.16.00097] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/06/2017] [Indexed: 05/21/2023]
Abstract
The adhesion of plant cells is vital for support and protection of the plant body and is maintained by a variety of molecular associations between cell wall components. In some specialized cases, though, plant cells are programmed to detach, and root cap-derived border cells are examples of this. Border cells (in some species known as border-like cells) provide an expendable barrier between roots and the environment. Their maturation and release is an important but poorly characterized cell separation event. To gain a deeper insight into the complex cellular dynamics underlying this process, we undertook a systematic, detailed analysis of pea (Pisum sativum) root tip cell walls. Our study included immunocarbohydrate microarray profiling, monosaccharide composition determination, Fourier-transformed infrared microspectroscopy, quantitative reverse transcription-PCR of cell wall biosynthetic genes, analysis of hydrolytic activities, transmission electron microscopy, and immunolocalization of cell wall components. Using this integrated glycobiology approach, we identified multiple novel modes of cell wall structural and compositional rearrangement during root cap growth and the release of border cells. Our findings provide a new level of detail about border cell maturation and enable us to develop a model of the separation process. We propose that loss of adhesion by the dissolution of homogalacturonan in the middle lamellae is augmented by an active biophysical process of cell curvature driven by the polarized distribution of xyloglucan and extensin epitopes.
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Affiliation(s)
- Jozef Mravec
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.);
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.);
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Xiaoyuan Guo
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Aleksander Riise Hansen
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Julia Schückel
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Stjepan Krešimir Kračun
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Maria Dalgaard Mikkelsen
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Grégory Mouille
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Ida Elisabeth Johansen
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - Peter Ulvskov
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - David S Domozych
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.)
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.)
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
| | - William George Tycho Willats
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg 1871, Denmark (J.M., X.G., A.R.H., J.S., S.K.K., M.D.M., I.E.J., P.U.);
- Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique/AgroParisTech, Saclay Plant Sciences, Institut National de la Recherche Agronomique Centre de Versailles, 78026 Versailles cedex, France (G.M.);
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866 (D.S.D.); and
- School of Agriculture, Food, and Rural Development, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom (W.G.T.W.)
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156
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Zhu Y, Chen X. Expanding the Scope of Metabolic Glycan Labeling in Arabidopsis thaliana. Chembiochem 2017; 18:1286-1296. [PMID: 28383803 DOI: 10.1002/cbic.201700069] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Indexed: 12/26/2022]
Abstract
Metabolic glycan labeling (MGL) has gained wide utility and has become a useful tool for probing glycosylation in living systems. For the past three decades, the development and application of MGL have mostly focused on animal glycosylation. Recently, exploiting MGL for studying plant glycosylation has gained interest. Here, we describe a systematic evaluation of MGL for fluorescence imaging of root glycans in Arabidopsis thaliana. Nineteen monosaccharide analogues containing a bioorthogonal group (azide, alkyne, or cyclopropene) were synthesized and evaluated for metabolic incorporation into root glycans. Among these unnatural sugars, 14 (including three new compounds) were evaluated in plants for the first time. Our results showed that five unnatural sugars metabolically labeled root glycans efficiently, and enabled fluorescence imaging by bioorthogonal conjugation with fluorophores. We optimized the experimental procedures for MGL in Arabidopsis. Finally, distinct distribution patterns of the newly synthesized glycans were observed along the root developmental zones, thus indicating regulated biosynthesis of glycans during root development. We envision that MGL will find broad applications in plant glycobiology.
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Affiliation(s)
- Yuntao Zhu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xing Chen
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.,Peking-Tsinghua Center for Life Sciences, Synthetic and Functional Biomolecules Center and, Key Laboratory of Bioorganic Chemistry and, Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China
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157
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Zhang T, Vavylonis D, Durachko DM, Cosgrove DJ. Nanoscale movements of cellulose microfibrils in primary cell walls. NATURE PLANTS 2017; 3:17056. [PMID: 28452988 PMCID: PMC5478883 DOI: 10.1038/nplants.2017.56] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 03/22/2017] [Indexed: 05/18/2023]
Abstract
The growing plant cell wall is commonly considered to be a fibre-reinforced structure whose strength, extensibility and anisotropy depend on the orientation of crystalline cellulose microfibrils, their bonding to the polysaccharide matrix and matrix viscoelasticity1-4. Structural reinforcement of the wall by stiff cellulose microfibrils is central to contemporary models of plant growth, mechanics and meristem dynamics4-12. Although passive microfibril reorientation during wall extension has been inferred from theory and from bulk measurements13-15, nanometre-scale movements of individual microfibrils have not been directly observed. Here we combined nanometre-scale imaging of wet cell walls by atomic force microscopy (AFM) with a stretching device and endoglucanase treatment that induces wall stress relaxation and creep, mimicking wall behaviours during cell growth. Microfibril movements during forced mechanical extensions differ from those during creep of the enzymatically loosened wall. In addition to passive angular reorientation, we observed a diverse repertoire of microfibril movements that reveal the spatial scale of molecular connections between microfibrils. Our results show that wall loosening alters microfibril connectivity, enabling microfibril dynamics not seen during mechanical stretch. These insights into microfibril movements and connectivities need to be incorporated into refined models of plant cell wall structure, growth and morphogenesis.
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Affiliation(s)
- Tian Zhang
- Department of Biology and Center for Lignocellulose Structure and Formation, 208 Mueller Laboratory, Penn State University, University Park, PA 16802 USA
| | | | - Daniel M. Durachko
- Department of Biology and Center for Lignocellulose Structure and Formation, 208 Mueller Laboratory, Penn State University, University Park, PA 16802 USA
| | - Daniel J. Cosgrove
- Department of Biology and Center for Lignocellulose Structure and Formation, 208 Mueller Laboratory, Penn State University, University Park, PA 16802 USA
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158
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Ibragimova NN, Ageeva MV, Gorshkova TA. Development of gravitropic response: unusual behavior of flax phloem G-fibers. PROTOPLASMA 2017; 254:749-762. [PMID: 27263083 DOI: 10.1007/s00709-016-0985-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 05/13/2016] [Indexed: 05/25/2023]
Abstract
The major mechanism of gravitropism that is discussed for herbal plants is based on the nonuniform elongation of cells located on the opposite stem sides, occurring in the growing zone of an organ. However, gravitropic response of flax (Linum usitatissimum L.) is well-pronounced in the lower half of developing stem, which has ceased elongation long in advance of plant inclination. We have analyzed the stem curvature region by various approaches of microscopy and found the undescribed earlier significant modifications in primary phloem fibers that have constitutively developed G-layer. In fibers on the pulling stem side, cell portions were widened with formation of "bottlenecks" between them, leading to the "sausage-like" shape of a cell. Lumen diameter in fiber widening increased, while cell wall thickness decreased. Callose was deposited in proximity to bottlenecks and sometimes totally occluded their lumen. Structure of fiber cell wall changed considerably, with formation of breaks between G- and S-layers. Thick fibrillar structures that were revealed in fiber cell wall by light microscopy got oblique orientation instead of parallel to the fiber axis one in control plants. The described changes occurred at various combinations of gravitational and mechanical stimuli. Thus, phloem fibers with constitutively formed gelatinous cell wall, located in nonelongating parts of herbal plant, are involved in gravitropism and may become an important element in general understanding of the gravity effects on plants. We suggest flax phloem fibers as the model system to study the mechanism of plant position correction, including signal perception and transduction.
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Affiliation(s)
- Nadezda N Ibragimova
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str. 2/31, Kazan, 420111, Russia.
| | - Marina V Ageeva
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str. 2/31, Kazan, 420111, Russia
| | - Tatyana A Gorshkova
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Center, Russian Academy of Sciences, Lobachevsky Str. 2/31, Kazan, 420111, Russia
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159
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Multi-layer mucilage of Plantago ovata seeds: Rheological differences arise from variations in arabinoxylan side chains. Carbohydr Polym 2017; 165:132-141. [PMID: 28363533 DOI: 10.1016/j.carbpol.2017.02.038] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/04/2017] [Accepted: 02/11/2017] [Indexed: 11/20/2022]
Abstract
Mucilages are hydrocolloid solutions produced by plants for a variety of functions, including the creation of a water-holding barrier around seeds. Here we report our discovery of the formation of three distinct mucilage layers around Plantago ovata seeds upon their hydration. Each layer is dominated by different arabinoxylans (AXs). These AXs are unusual because they are highly branched and contain β-1,3-linked xylose in their side chains. We show that these AXs have similar monosaccharide and linkage composition, but vary in their polymer conformation. They also exhibit distinct rheological properties in aqueous solution, despite analytical techniques including NMR showing little difference between them. Using enzymatic hydrolysis and chaotropic solvents, we reveal that hydrogen bonding and side chain distribution are key factors underpinning the distinct rheological properties of these complex AXs.
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160
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John SP, Hasenstein KH. The role of peltate scales in desiccation tolerance of Pleopeltis polypodioides. PLANTA 2017; 245:207-220. [PMID: 27928638 DOI: 10.1007/s00425-016-2631-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 11/30/2016] [Indexed: 05/14/2023]
Abstract
The extreme drought tolerance of the resurrection fern is in part the result of the dorsal scales that assist in water distribution and controlled desiccation. We studied the effect of peltate scales on water uptake and loss of the desiccation-tolerant epiphytic fern Pleopeltis polypodioides using optical and FTIR microscopy and staining with calcofluor, solophenyl flavine7GFE, and Ruthenium Red. We provide information on structure, property, and function of the scales by measuring water uptake and dehydration, contact angles, and metabolic activity. Peltate scales mainly contain cellulose, xylogalactans, and pectin. Water is absorbed from the center of scales, and the overlapping arrangement of scales facilitates surface spreading of water. Intact fronds hydrated fully within 5 h of imbibition of the apical pinna, without scales water uptake stopped after 1 h. Hydration rates via rhizomes followed a longer time course but also improved in the presence of scales. Fronds with and without scales lost half of their water content in 15 or 4 h, respectively. The overall metabolism of rapidly dehydrated fronds was significantly reduced compared with slowly dehydrated fronds. Thus, water management and metabolism of Pleopeltis are dependent on surface properties determined by peltate scales.
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Affiliation(s)
- Susan P John
- Department of Biology, University of Louisiana at Lafayette, Lafayette, LA, 70503, USA
| | - Karl H Hasenstein
- Department of Biology, University of Louisiana at Lafayette, Lafayette, LA, 70503, USA.
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161
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Schneider R, Hanak T, Persson S, Voigt CA. Cellulose and callose synthesis and organization in focus, what's new? CURRENT OPINION IN PLANT BIOLOGY 2016; 34:9-16. [PMID: 27479608 DOI: 10.1016/j.pbi.2016.07.007] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 07/17/2016] [Accepted: 07/20/2016] [Indexed: 05/02/2023]
Abstract
Plant growth and development are supported by plastic but strong cell walls. These walls consist largely of polysaccharides that vary in content and structure. Most of the polysaccharides are produced in the Golgi apparatus and are then secreted to the apoplast and built into the growing walls. However, the two glucan polymers cellulose and callose are synthesized at the plasma membrane by cellulose or callose synthase complexes, respectively. Cellulose is the most common cell wall polymer in land plants and provides strength to the walls to support directed cell expansion. In contrast, callose is integral to specialized cell walls, such as the cell plate that separates dividing cells and growing pollen tube walls, and maintains important functions during abiotic and biotic stress responses. The last years have seen a dramatic increase in our understanding of how cellulose and callose are manufactured, and new factors that regulate the synthases have been identified. Much of this knowledge has been amassed via various microscopy-based techniques, including various confocal techniques and super-resolution imaging. Here, we summarize and synthesize recent findings in the fields of cellulose and callose synthesis in plant biology.
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Affiliation(s)
- René Schneider
- School of BioSciences, University of Melbourne, 3010 Parkville, Melbourne, Australia
| | - Tobias Hanak
- Phytopathology and Biochemistry, Biocenter Klein Flottbek, University of Hamburg, Hamburg, Germany
| | - Staffan Persson
- School of BioSciences, University of Melbourne, 3010 Parkville, Melbourne, Australia.
| | - Christian A Voigt
- Phytopathology and Biochemistry, Biocenter Klein Flottbek, University of Hamburg, Hamburg, Germany.
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162
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Arabidopsis Regenerating Protoplast: A Powerful Model System for Combining the Proteomics of Cell Wall Proteins and the Visualization of Cell Wall Dynamics. Proteomes 2016; 4:proteomes4040034. [PMID: 28248244 PMCID: PMC5260967 DOI: 10.3390/proteomes4040034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/04/2016] [Accepted: 11/04/2016] [Indexed: 11/17/2022] Open
Abstract
The development of a range of sub-proteomic approaches to the plant cell wall has identified many of the cell wall proteins. However, it remains difficult to elucidate the precise biological role of each protein and the cell wall dynamics driven by their actions. The plant protoplast provides an excellent means not only for characterizing cell wall proteins, but also for visualizing the dynamics of cell wall regeneration, during which cell wall proteins are secreted. It therefore offers a unique opportunity to investigate the de novo construction process of the cell wall. This review deals with sub-proteomic approaches to the plant cell wall through the use of protoplasts, a methodology that will provide the basis for further exploration of cell wall proteins and cell wall dynamics.
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163
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The Impact of Microfibril Orientations on the Biomechanics of Plant Cell Walls and Tissues. Bull Math Biol 2016; 78:2135-2164. [PMID: 27761699 PMCID: PMC5090020 DOI: 10.1007/s11538-016-0207-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 09/19/2016] [Indexed: 11/09/2022]
Abstract
The microscopic structure and anisotropy of plant cell walls greatly influence the mechanical properties, morphogenesis, and growth of plant cells and tissues. The microscopic structure and properties of cell walls are determined by the orientation and mechanical properties of the cellulose microfibrils and the mechanical properties of the cell wall matrix. Viewing the shape of a plant cell as a square prism with the axis aligning with the primary direction of expansion and growth, the orientation of the microfibrils within the side walls, i.e. the parts of the cell walls on the sides of the cells, is known. However, not much is known about their orientation at the upper and lower ends of the cell. Here we investigate the impact of the orientation of cellulose microfibrils within the upper and lower parts of the plant cell walls by solving the equations of linear elasticity numerically. Three different scenarios for the orientation of the microfibrils are considered. We also distinguish between the microstructure in the side walls given by microfibrils perpendicular to the main direction of the expansion and the situation where the microfibrils are rotated through the wall thickness. The macroscopic elastic properties of the cell wall are obtained using homogenization theory from the microscopic description of the elastic properties of the cell wall microfibrils and wall matrix. It is found that the orientation of the microfibrils in the upper and lower parts of the cell walls affects the expansion of the cell in the lateral directions and is particularly important in the case of forces acting on plant cell walls and tissues.
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164
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Ezquer I, Mizzotti C, Nguema-Ona E, Gotté M, Beauzamy L, Viana VE, Dubrulle N, Costa de Oliveira A, Caporali E, Koroney AS, Boudaoud A, Driouich A, Colombo L. The Developmental Regulator SEEDSTICK Controls Structural and Mechanical Properties of the Arabidopsis Seed Coat. THE PLANT CELL 2016; 28:2478-2492. [PMID: 27624758 PMCID: PMC5134981 DOI: 10.1105/tpc.16.00454] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/22/2016] [Accepted: 09/09/2016] [Indexed: 05/10/2023]
Abstract
Although many transcription factors involved in cell wall morphogenesis have been identified and studied, it is still unknown how genetic and molecular regulation of cell wall biosynthesis is integrated into developmental programs. We demonstrate by molecular genetic studies that SEEDSTICK (STK), a transcription factor controlling ovule and seed integument identity, directly regulates PMEI6 and other genes involved in the biogenesis of the cellulose-pectin matrix of the cell wall. Based on atomic force microscopy, immunocytochemistry, and chemical analyses, we propose that structural modifications of the cell wall matrix in the stk mutant contribute to defects in mucilage release and seed germination under water-stress conditions. Our studies reveal a molecular network controlled by STK that regulates cell wall properties of the seed coat, demonstrating that developmental regulators controlling organ identity also coordinate specific aspects of cell wall characteristics.
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Affiliation(s)
- Ignacio Ezquer
- Dipartimento di BioScienze, Università degli Studi di Milano, 20133 Milan, Italy
- Consiglio Nazionale delle Ricerche, Istituto di Biofisica, 20133 Milan, Italy
| | - Chiara Mizzotti
- Dipartimento di BioScienze, Università degli Studi di Milano, 20133 Milan, Italy
| | - Eric Nguema-Ona
- Laboratoire Glycobiologie et Matrice Extracellulaire, Normandie Université, UNIROUEN, Végétal, Agronomie, Sol, et Innovation (VASI), 76821 Mont-Saint-Aignan, France
- Centre Mondial de l'Innovation-Laboratoire de Nutrition Végétale, 35400 Saint Malo, France
| | - Maxime Gotté
- Laboratoire Glycobiologie et Matrice Extracellulaire, Normandie Université, UNIROUEN, Végétal, Agronomie, Sol, et Innovation (VASI), 76821 Mont-Saint-Aignan, France
| | - Léna Beauzamy
- Laboratoire de Reproduction et Développement des Plantes, INRA, CNRS, ENS, UCB Lyon 1, Université de Lyon, 69364 Lyon Cedex 07, France
| | - Vivian Ebeling Viana
- Plant Genomics and Breeding Center, Technology Development Center, Federal University of Pelotas, RS 96010-900, Brazil
| | - Nelly Dubrulle
- Laboratoire de Reproduction et Développement des Plantes, INRA, CNRS, ENS, UCB Lyon 1, Université de Lyon, 69364 Lyon Cedex 07, France
| | - Antonio Costa de Oliveira
- Plant Genomics and Breeding Center, Technology Development Center, Federal University of Pelotas, RS 96010-900, Brazil
| | - Elisabetta Caporali
- Dipartimento di BioScienze, Università degli Studi di Milano, 20133 Milan, Italy
| | - Abdoul-Salam Koroney
- Laboratoire Glycobiologie et Matrice Extracellulaire, Normandie Université, UNIROUEN, Végétal, Agronomie, Sol, et Innovation (VASI), 76821 Mont-Saint-Aignan, France
| | - Arezki Boudaoud
- Laboratoire de Reproduction et Développement des Plantes, INRA, CNRS, ENS, UCB Lyon 1, Université de Lyon, 69364 Lyon Cedex 07, France
| | - Azeddine Driouich
- Laboratoire Glycobiologie et Matrice Extracellulaire, Normandie Université, UNIROUEN, Végétal, Agronomie, Sol, et Innovation (VASI), 76821 Mont-Saint-Aignan, France
| | - Lucia Colombo
- Dipartimento di BioScienze, Università degli Studi di Milano, 20133 Milan, Italy
- Consiglio Nazionale delle Ricerche, Istituto di Biofisica, 20133 Milan, Italy
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165
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Xiao C, Anderson CT. Interconnections between cell wall polymers, wall mechanics, and cortical microtubules: Teasing out causes and consequences. PLANT SIGNALING & BEHAVIOR 2016; 11:e1215396. [PMID: 27611066 PMCID: PMC5155451 DOI: 10.1080/15592324.2016.1215396] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 07/18/2016] [Accepted: 07/18/2016] [Indexed: 05/18/2023]
Abstract
In plants, cell wall components including cellulose, hemicelluloses, and pectins interact with each other to form complex extracellular network structures that control cell growth and maintain cell shape. However, it is still not clear exactly how different wall polymers interact, how the conformations and interactions of cell wall polymers relate to wall mechanics, and how these factors impinge on intracellular structures such as the cortical microtubule cytoskeleton. Here, based on studies of Arabidopsis thaliana xxt1 xxt2 mutants, which lack detectable xyloglucan in their walls and display aberrant wall mechanics, altered cellulose patterning and biosynthesis, and reduced cortical microtubule stability, we discuss the potential relationships between cell wall biosynthesis, wall mechanics, and cytoskeletal dynamics in an effort to better understand their roles in controlling plant growth and morphogenesis.
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Affiliation(s)
- Chaowen Xiao
- Department of Biology, The Pennsylvania State
University, University Park, PA, USA
- Center for Lignocellulose Structure and
Formation, The Pennsylvania State University, University Park, PA,
USA
| | - Charles T. Anderson
- Department of Biology, The Pennsylvania State
University, University Park, PA, USA
- Center for Lignocellulose Structure and
Formation, The Pennsylvania State University, University Park, PA,
USA
- CONTACT Charles T. Anderson
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166
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Whitehill JGA, Henderson H, Schuetz M, Skyba O, Yuen MMS, King J, Samuels AL, Mansfield SD, Bohlmann J. Histology and cell wall biochemistry of stone cells in the physical defence of conifers against insects. PLANT, CELL & ENVIRONMENT 2016; 39:1646-1661. [PMID: 26474726 DOI: 10.1111/pce.12654] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/28/2015] [Accepted: 09/29/2015] [Indexed: 06/05/2023]
Abstract
Conifers possess an array of physical and chemical defences against stem-boring insects. Stone cells provide a physical defence associated with resistance against bark beetles and weevils. In Sitka spruce (Picea sitchensis), abundance of stone cells in the cortex of apical shoots is positively correlated with resistance to white pine weevil (Pissodes strobi). We identified histological, biochemical and molecular differences in the stone cell phenotype of weevil resistant (R) or susceptible (S) Sitka spruce genotypes. R trees displayed significantly higher quantities of cortical stone cells near the apical shoot node, the primary site for weevil feeding. Lignin, cellulose, xylan and mannan were the most abundant components of stone cell secondary walls, respectively. Lignin composition of stone cells isolated from R trees contained a higher percentage of G-lignin compared with S trees. Transcript profiling revealed higher transcript abundance in the R genotype of coumarate 3-hydroxylase, a key monolignol biosynthetic gene. Developing stone cells in current year apical shoots incorporated fluorescent-tagged monolignol into the secondary cell wall, while mature stone cells of previous year apical shoots did not. Stone cell development is an ephemeral process, and fortification of shoot tips in R trees is an effective strategy against insect feeding.
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Affiliation(s)
- Justin G A Whitehill
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, BC, Canada, V6T 1Z4
| | - Hannah Henderson
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, BC, Canada, V6T 1Z4
| | - Mathias Schuetz
- Department of Botany, University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada, V6T 1Z4
| | - Oleksandr Skyba
- Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, Canada, V6T 1Z4
| | - Macaire Man Saint Yuen
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, BC, Canada, V6T 1Z4
| | - John King
- British Columbia Ministry of Forests, Lands, and Natural Resource Operations, Victoria, BC, Canada, V8W 9C2
| | - A Lacey Samuels
- Department of Botany, University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada, V6T 1Z4
| | - Shawn D Mansfield
- Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, Canada, V6T 1Z4
| | - Jörg Bohlmann
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, BC, Canada, V6T 1Z4
- Department of Botany, University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada, V6T 1Z4
- Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC, Canada, V6T 1Z4
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167
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Sorieul M, Dickson A, Hill SJ, Pearson H. Plant Fibre: Molecular Structure and Biomechanical Properties, of a Complex Living Material, Influencing Its Deconstruction towards a Biobased Composite. MATERIALS 2016; 9:ma9080618. [PMID: 28773739 PMCID: PMC5509024 DOI: 10.3390/ma9080618] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 07/14/2016] [Accepted: 07/15/2016] [Indexed: 02/07/2023]
Abstract
Plant cell walls form an organic complex composite material that fulfils various functions. The hierarchical structure of this material is generated from the integration of its elementary components. This review provides an overview of wood as a composite material followed by its deconstruction into fibres that can then be incorporated into biobased composites. Firstly, the fibres are defined, and their various origins are discussed. Then, the organisation of cell walls and their components are described. The emphasis is on the molecular interactions of the cellulose microfibrils, lignin and hemicelluloses in planta. Hemicelluloses of diverse species and cell walls are described. Details of their organisation in the primary cell wall are provided, as understanding of the role of hemicellulose has recently evolved and is likely to affect our perception and future study of their secondary cell wall homologs. The importance of the presence of water on wood mechanical properties is also discussed. These sections provide the basis for understanding the molecular arrangements and interactions of the components and how they influence changes in fibre properties once isolated. A range of pulping processes can be used to individualise wood fibres, but these can cause damage to the fibres. Therefore, issues relating to fibre production are discussed along with the dispersion of wood fibres during extrusion. The final section explores various ways to improve fibres obtained from wood.
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Affiliation(s)
| | - Alan Dickson
- Scion, Private Bag 3020, Rotorua 3046, New Zealand.
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168
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Wang B, McClosky DD, Anderson CT, Chen G. Synthesis of a suite of click-compatible sugar analogs for probing carbohydrate metabolism. Carbohydr Res 2016; 433:54-62. [PMID: 27447057 DOI: 10.1016/j.carres.2016.07.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 07/08/2016] [Accepted: 07/08/2016] [Indexed: 10/21/2022]
Abstract
Metabolic labeling based on the click chemistry between alkynyl and azido groups offers a powerful tool to study the function of carbohydrates in living systems, including plants. Herein, we describe the chemical synthesis of six alkynyl-modified sugars designed as analogs to D-glucose, D-mannose, L-rhamnose and sucrose present in plant cell walls. Among these new alkynyl probes, four of them are the 6-deoxy-alkynyl analogs of the corresponding sugars and do not possess any 6-OH groups. The other two are based on a new structural design, in which an ethynyl group is incorporated at the C-6 position of the sugar and the 6-OH group remains. The synthetic routes for both types of probes share common aldehyde intermediates, which are derived from the corresponding 6-OH precursor with other hydroxy groups protected. The overall synthesis sequence of these probes is efficient, concise, and scalable.
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Affiliation(s)
- Bo Wang
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA
| | - Daniel D McClosky
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA; Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA
| | - Charles T Anderson
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA; Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Gong Chen
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA; State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China.
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169
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Zhu Y, Wu J, Chen X. Metabolic Labeling and Imaging of N‐Linked Glycans in
Arabidopsis Thaliana. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603032] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yuntao Zhu
- College of Chemistry and Molecular EngineeringPeking University Beijing 100871 China
| | - Jie Wu
- Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Xing Chen
- College of Chemistry and Molecular EngineeringPeking University Beijing 100871 China
- Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
- Synthetic and Functional Biomolecules Center, and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationPeking University Beijing 100871 China
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170
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Zhu Y, Wu J, Chen X. Metabolic Labeling and Imaging of N-Linked Glycans in Arabidopsis Thaliana. Angew Chem Int Ed Engl 2016; 55:9301-5. [PMID: 27346875 DOI: 10.1002/anie.201603032] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 05/20/2016] [Indexed: 11/06/2022]
Abstract
Molecular imaging of glycans has been actively pursued in animal systems for the past decades. However, visualization of plant glycans remains underdeveloped, despite that glycosylation is essential for the life cycle of plants. Metabolic glycan labeling in Arabidopsis thaliana by using N-azidoacetylglucosamine (GlcNAz) as the chemical reporter is reported. GlcNAz is metabolized through the salvage pathway of N-acetylglucosamine (GlcNAc) and incorporated into N-linked glycans, and possibly intracellular O-GlcNAc. Click-labeling with fluorescent probes enables visualization of newly synthesized N-linked glycans. N-glycosylation in the root tissue was discovered to possess distinct distribution patterns in different developmental zones, suggesting that N-glycosylation is regulated in a developmental stage-dependent manner. This work shows the utility of metabolic glycan labeling in elucidating the function of N-linked glycosylation in plants.
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Affiliation(s)
- Yuntao Zhu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jie Wu
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China
| | - Xing Chen
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China. .,Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, 100871, China. .,Synthetic and Functional Biomolecules Center, and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Peking University, Beijing, 100871, China.
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171
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Liu J, Kim JI, Cusumano JC, Chapple C, Venugopalan N, Fischetti RF, Makowski L. The impact of alterations in lignin deposition on cellulose organization of the plant cell wall. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:126. [PMID: 27330560 PMCID: PMC4912819 DOI: 10.1186/s13068-016-0540-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 06/02/2016] [Indexed: 05/04/2023]
Abstract
BACKGROUND Coordination of synthesis and assembly of the polymeric components of cell walls is essential for plant growth and development. Given the degree of co-mingling and cross-linking among cell wall components, cellulose organization must be dependent on the organization of other polymers such as lignin. Here we seek to identify aspects of that codependency by studying the structural organization of cellulose fibrils in stems from Arabidopsis plants harboring mutations in genes encoding enzymes involved in lignin biosynthesis. Plants containing high levels of G-lignin, S-lignin, H-lignin, aldehyde-rich lignin, and ferulic acid-containing lignin, along with plants with very low lignin content were grown and harvested and longitudinal sections of stem were prepared and dried. Scanning X-ray microdiffraction was carried out using a 5-micron beam that moved across the sections in 5-micron steps and complete diffraction patterns were collected at each raster point. Approximately, 16,000 diffraction patterns were analyzed to determine cellulose fibril orientation and order within the tissues making up the stems. RESULTS Several mutations-most notably those exhibiting (1) down-regulation of cinnamoyl CoA reductase which leads to cell walls deficient in lignin and (2) defect of cinnamic acid 4-hydroxylase which greatly reduces lignin content-exhibited significant decrease in the proportion of oriented cellulose fibrils in the cell wall. Distinctions between tissues were maintained in all variants and even in plants exhibiting dramatic changes in cellulosic order the trends between tissues (where apparent) were generally maintained. The resilience of cellulose to degradative processes was investigated by carrying out the same analysis on samples stored in water for 30 days prior to data collection. This treatment led to significant loss of cellulosic order in plants rich in aldehyde or H-lignin, less change in wild type, and essentially no change in samples with high levels of G- or S-lignin. CONCLUSIONS These studies demonstrate that changes in lignin biosynthesis lead to significant disruption in the orientation and order of cellulose fibrils in all tissues of the stem. These dramatic phenotypic changes, in mutants with lignin rich in aldehyde or H-units, correlate with the impact the mutations have on the enzymatic degradation of the plant cell wall.
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Affiliation(s)
- Jiliang Liu
- />Department of Bioengineering, Northeastern University, 360 Huntington Ave, Boston, MA 02148 USA
| | - Jeong Im Kim
- />Department of Biochemistry, Purdue University, 175 South University Street, West Lafayette, IN 47907 USA
| | - Joanne C. Cusumano
- />Department of Biochemistry, Purdue University, 175 South University Street, West Lafayette, IN 47907 USA
| | - Clint Chapple
- />Department of Biochemistry, Purdue University, 175 South University Street, West Lafayette, IN 47907 USA
| | - Nagarajan Venugopalan
- />GM/CA CAT, XSD, Advanced Photon Source, Argonne National Laboratory, 9700 Cass Ave, Lemont, IL 60439 USA
| | - Robert F. Fischetti
- />GM/CA CAT, XSD, Advanced Photon Source, Argonne National Laboratory, 9700 Cass Ave, Lemont, IL 60439 USA
| | - Lee Makowski
- />Department of Bioengineering, Northeastern University, 360 Huntington Ave, Boston, MA 02148 USA
- />Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Ave, Boston, MA 02148 USA
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172
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Stiff MR, Haigler CH. Cotton fiber tips have diverse morphologies and show evidence of apical cell wall synthesis. Sci Rep 2016; 6:27883. [PMID: 27301434 PMCID: PMC4908599 DOI: 10.1038/srep27883] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 05/24/2016] [Indexed: 12/31/2022] Open
Abstract
Cotton fibers arise through highly anisotropic expansion of a single seed epidermal cell. We obtained evidence that apical cell wall synthesis occurs through examining the tips of young elongating Gossypium hirsutum (Gh) and G. barbadense (Gb) fibers. We characterized two tip types in Gh fiber (hemisphere and tapered), each with distinct apical diameter, central vacuole location, and distribution of cell wall components. The apex of Gh hemisphere tips was enriched in homogalacturonan epitopes, including a relatively high methyl-esterified form associated with cell wall pliability. Other wall components increased behind the apex including cellulose and the α-Fuc-(1,2)-β-Gal epitope predominantly found in xyloglucan. Gb fibers had only one narrow tip type featuring characters found in each Gh tip type. Pulse-labeling of cell wall glucans indicated wall synthesis at the apex of both Gh tip types and in distal zones. Living Gh hemisphere and Gb tips ruptured preferentially at the apex upon treatment with wall degrading enzymes, consistent with newly synthesized wall at the apex. Gh tapered tips ruptured either at the apex or distantly. Overall, the results reveal diverse cotton fiber tip morphologies and support primary wall synthesis occurring at the apex and discrete distal regions of the tip.
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Affiliation(s)
- Michael R Stiff
- Department of Crop Science, North Carolina State University, Raleigh, North Carolina 27695 USA
| | - Candace H Haigler
- Department of Crop Science, North Carolina State University, Raleigh, North Carolina 27695 USA.,Department of Plant and Microbial Biology, North Carolina State University, Raleigh, North Carolina 27695 USA
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173
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Voiniciuc C, Zimmermann E, Schmidt MHW, Günl M, Fu L, North HM, Usadel B. Extensive Natural Variation in Arabidopsis Seed Mucilage Structure. FRONTIERS IN PLANT SCIENCE 2016; 7:803. [PMID: 27375657 PMCID: PMC4894908 DOI: 10.3389/fpls.2016.00803] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 05/23/2016] [Indexed: 05/23/2023]
Abstract
Hydrated Arabidopsis thaliana seeds are coated by a gelatinous layer called mucilage, which is mainly composed of cell wall polysaccharides. Since mucilage is rich in pectin, its architecture can be visualized with the ruthenium red (RR) dye. We screened the seeds of around 280 Arabidopsis natural accessions for variation in mucilage structure, and identified a large number of novel variants that differed from the Col-0 wild-type. Most of the accessions released smaller RR-stained capsules compared to the Col-0 reference. By biochemically characterizing the phenotypes of 25 of these accessions in greater detail, we discovered that distinct changes in polysaccharide structure resulted in gelatinous coatings with a deceptively similar appearance. Monosaccharide composition analysis of total mucilage extracts revealed a remarkable variation (from 50 to 200% of Col-0 levels) in the content of galactose and mannose, which are important subunits of heteromannan. In addition, most of the natural variants had altered Pontamine Fast Scarlet 4B staining of cellulose and significantly reduced birefringence of crystalline structures. This indicates that the production or organization of cellulose may be affected by the presence of different amounts of hemicellulose. Although, the accessions described in this study were primarily collected from Western Europe, they form five different phenotypic classes based on the combined results of our experiments. This suggests that polymorphisms at multiple loci are likely responsible for the observed mucilage structure. The transcription of MUCILAGE-RELATED10 (MUCI10), which encodes a key enzyme for galactoglucomannan synthesis, was severely reduced in multiple variants that phenocopied the muci10-1 insertion mutant. Although, we could not pinpoint any causal polymorphisms in this gene, constitutive expression of fluorescently-tagged MUCI10 proteins complemented the mucilage defects of a muci10-like accession. This leads us to hypothesize that some accessions might disrupt a transcriptional regulator of MUCI10. Therefore, this collection of publicly-available variants should provide insight into plant cell wall organization and facilitate the discovery of genes that regulate polysaccharide biosynthesis.
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Affiliation(s)
- Cătălin Voiniciuc
- Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum JülichJülich, Germany
- Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen UniversityAachen, Germany
| | - Eva Zimmermann
- Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum JülichJülich, Germany
| | - Maximilian Heinrich-Wilhelm Schmidt
- Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum JülichJülich, Germany
- Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen UniversityAachen, Germany
| | - Markus Günl
- Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum JülichJülich, Germany
| | - Lanbao Fu
- Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen UniversityAachen, Germany
| | - Helen M. North
- Centre National de la Recherche Scientifique, Institut Jean-Pierre Bourgin, INRA, AgroParisTech, Université Paris-SaclayVersailles, France
| | - Björn Usadel
- Institute for Bio- and Geosciences (IBG-2: Plant Sciences), Forschungszentrum JülichJülich, Germany
- Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen UniversityAachen, Germany
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174
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Dayal MS, Catchmark JM. Mechanical and structural property analysis of bacterial cellulose composites. Carbohydr Polym 2016; 144:447-53. [DOI: 10.1016/j.carbpol.2016.02.055] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/17/2016] [Accepted: 02/19/2016] [Indexed: 10/22/2022]
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175
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Fridman Y, Holland N, Elbaum R, Savaldi-Goldstein S. High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications. J Vis Exp 2016. [PMID: 27214583 DOI: 10.3791/53707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Plant cells are surrounded by a cell wall, the composition of which determines their final size and shape. The cell wall is composed of a complex matrix containing polysaccharides that include cellulose microfibrils that form both crystalline structures and cellulose chains of amorphous organization. The orientation of the cellulose fibers and their concentrations dictate the mechanical properties of the cell. Several methods are used to determine the levels of crystalline cellulose, each bringing both advantages and limitations. Some can distinguish the proportion of crystalline regions within the total cellulose. However, they are limited to whole-organ analyses that are deficient in spatiotemporal information. Others relying on live imaging, are limited by the use of imprecise dyes. Here, we report a sensitive polarized light-based system for specific quantification of relative light retardance, representing crystalline cellulose accumulation in cross sections of Arabidopsis thaliana roots. In this method, the cellular resolution and anatomical data are maintained, enabling direct comparisons between the different tissues composing the growing root. This approach opens a new analytical dimension, shedding light on the link between cell wall composition, cellular behavior and whole-organ growth.
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Affiliation(s)
- Yulia Fridman
- Faculty of Biology, Technion-Israel Institute of Technology;
| | - Neta Holland
- Faculty of Biology, Technion-Israel Institute of Technology
| | - Rivka Elbaum
- Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University of Jerusalem
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176
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Chen S, Jia H, Zhao H, Liu D, Liu Y, Liu B, Bauer S, Somerville CR. Anisotropic Cell Expansion Is Affected through the Bidirectional Mobility of Cellulose Synthase Complexes and Phosphorylation at Two Critical Residues on CESA3. PLANT PHYSIOLOGY 2016; 171:242-50. [PMID: 26969722 PMCID: PMC4854686 DOI: 10.1104/pp.15.01874] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/04/2016] [Indexed: 05/17/2023]
Abstract
Here we report that phosphorylation status of S211 and T212 of the CESA3 component of Arabidopsis (Arabidopsis thaliana) cellulose synthase impacts the regulation of anisotropic cell expansion as well as cellulose synthesis and deposition and microtubule-dependent bidirectional mobility of CESA complexes. Mutation of S211 to Ala caused a significant decrease in the length of etiolated hypocotyls and primary roots, while root hairs were not significantly affected. By contrast, the S211E mutation stunted the growth of root hairs, but primary roots were not significantly affected. Similarly, T212E caused a decrease in the length of root hairs but not root length. However, T212E stunted the growth of etiolated hypocotyls. Live-cell imaging of fluorescently labeled CESA showed that the rate of movement of CESA particles was directionally asymmetric in etiolated hypocotyls of S211A and T212E mutants, while similar bidirectional velocities were observed with the wild-type control and S211E and T212A mutant lines. Analysis of cell wall composition and the innermost layer of cell wall suggests a role for phosphorylation of CESA3 S211 and T212 in cellulose aggregation into fibrillar bundles. These results suggest that microtubule-guided bidirectional mobility of CESA complexes is fine-tuned by phosphorylation of CESA3 S211 and T212, which may, in turn, modulate cellulose synthesis and organization, resulting in or contributing to the observed defects of anisotropic cell expansion.
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Affiliation(s)
- Shaolin Chen
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
| | - Honglei Jia
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
| | - Heyu Zhao
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
| | - Dan Liu
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
| | - Yanmei Liu
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
| | - Boyang Liu
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
| | - Stefan Bauer
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
| | - Chris R Somerville
- Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, Shaanxi, China (S.C., H.J., H.Z., D.L., Y.L., B.L.);College of Life Sciences, Northwest A&F University, Shaanxi, China (S.C., H.J.);Energy Biosciences Institute (S.B., C.R.S.), andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA (C.R.S.)
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177
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Ralet MC, Crépeau MJ, Vigouroux J, Tran J, Berger A, Sallé C, Granier F, Botran L, North HM. Xylans Provide the Structural Driving Force for Mucilage Adhesion to the Arabidopsis Seed Coat. PLANT PHYSIOLOGY 2016; 171:165-78. [PMID: 26979331 PMCID: PMC4854713 DOI: 10.1104/pp.16.00211] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 03/13/2016] [Indexed: 05/02/2023]
Abstract
Arabidopsis (Arabidopsis thaliana) seed coat epidermal cells produce large amounts of mucilage that is released upon imbibition. This mucilage is structured into two domains: an outer diffuse layer that can be easily removed by agitation and an inner layer that remains attached to the outer seed coat. Both layers are composed primarily of pectic rhamnogalacturonan I (RG-I), the inner layer also containing rays of cellulose that extend from the top of each columella. Perturbation in cellulosic ray formation has systematically been associated with a redistribution of pectic mucilage from the inner to the outer layer, in agreement with cellulose-pectin interactions, the nature of which remained unknown. Here, by analyzing the outer layer composition of a series of mutant alleles, a tight proportionality of xylose, galacturonic acid, and rhamnose was evidenced, except for mucilage modified5-1 (mum5-1; a mutant showing a redistribution of mucilage pectin from the inner adherent layer to the outer soluble one), for which the rhamnose-xylose ratio was increased drastically. Biochemical and in vitro binding assay data demonstrated that xylan chains are attached to RG-I chains and mediate the adsorption of mucilage to cellulose microfibrils. mum5-1 mucilage exhibited very weak adsorption to cellulose. MUM5 was identified as a putative xylosyl transferase recently characterized as MUCI21. Together, these findings suggest that the binding affinity of xylose ramifications on RG-I to a cellulose scaffold is one of the factors involved in the formation of the adherent mucilage layer.
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Affiliation(s)
- Marie-Christine Ralet
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Marie-Jeanne Crépeau
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Jacqueline Vigouroux
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Joseph Tran
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Adeline Berger
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Christine Sallé
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Fabienne Granier
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Lucy Botran
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
| | - Helen M North
- INRA, UR 1268 Biopolymères Interactions Assemblages, F-44316 Nantes, France (M.-C.R., M.-J.C., J.V.); andInstitut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026 Versailles cedex, France (J.T., A.B., C.S., F.G., L.B., H.M.N.)
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178
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Pauly M, Keegstra K. Biosynthesis of the Plant Cell Wall Matrix Polysaccharide Xyloglucan. ANNUAL REVIEW OF PLANT BIOLOGY 2016; 67:235-59. [PMID: 26927904 DOI: 10.1146/annurev-arplant-043015-112222] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Xyloglucan (XyG) is a matrix polysaccharide that is present in the cell walls of all land plants. It consists of a β-1,4-linked glucan backbone that is further substituted with xylosyl residues. These xylosyl residues can be further substituted with other glycosyl and nonglycosyl substituents that vary depending on the plant family and specific tissue. Advances in plant mutant isolation and characterization, functional genomics, and DNA sequencing have led to the identification of nearly all transferases and synthases necessary to synthesize XyG. Thus, in terms of the molecular mechanisms of plant cell wall polysaccharide biosynthesis, XyG is the most well understood. However, much remains to be learned about the molecular mechanisms of polysaccharide assembly and the regulation of these processes. Knowledge of the XyG biosynthetic machinery allows the XyG structure to be tailored in planta to ascertain the functions of this polysaccharide and its substituents in plant growth and interactions with the environment.
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Affiliation(s)
- Markus Pauly
- Department of Plant Cell Biology and Biotechnology, Heinrich Heine University, 40225 Düsseldorf, Germany;
| | - Kenneth Keegstra
- DOE Great Lakes Bioenergy Research Center, DOE Plant Research Laboratory, and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
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179
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McClosky DD, Wang B, Chen G, Anderson CT. The click-compatible sugar 6-deoxy-alkynyl glucose metabolically incorporates into Arabidopsis root hair tips and arrests their growth. PHYTOCHEMISTRY 2016; 123:16-24. [PMID: 26833385 DOI: 10.1016/j.phytochem.2016.01.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 12/18/2015] [Accepted: 01/08/2016] [Indexed: 06/05/2023]
Abstract
Plant cell walls are dynamic structures whose polysaccharide components are rearranged and recycled during growth and morphogenesis. Covalent fluorescent tagging of these polysaccharides following a metabolic labeling approach can help elucidate these changes. Herein reported are the synthesis and seedling-incorporation of a plant polysaccharide chemical reporter, 6-deoxy-alkynyl glucose (6dAG), that is modeled on D-glucose. Whereas fucose-alkyne, a previously reported chemical reporter for pectin, incorporates diffusely throughout growing cell walls, 6dAG incorporated specifically into root hair tips. This incorporation occurs in a time- and concentration-dependent manner. 6dAG exposure both induces and colocalizes with callose deposition in this tissue, and arrests both root hair and root growth. These results show that plants can incorporate an additional alkynyl-modified sugar analog into their metabolism, and into a discrete subcellular location.
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Affiliation(s)
- Daniel D McClosky
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA; Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Bo Wang
- Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA; Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Gong Chen
- Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA; Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Charles T Anderson
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA; Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA.
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180
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Rui Y, Anderson CT. Functional Analysis of Cellulose and Xyloglucan in the Walls of Stomatal Guard Cells of Arabidopsis. PLANT PHYSIOLOGY 2016; 170:1398-419. [PMID: 26729799 PMCID: PMC4775103 DOI: 10.1104/pp.15.01066] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 01/03/2016] [Indexed: 05/18/2023]
Abstract
Stomatal guard cells are pairs of specialized epidermal cells that control water and CO2 exchange between the plant and the environment. To fulfill the functions of stomatal opening and closure that are driven by changes in turgor pressure, guard cell walls must be both strong and flexible, but how the structure and dynamics of guard cell walls enable stomatal function remains poorly understood. To address this question, we applied cell biological and genetic analyses to investigate guard cell walls and their relationship to stomatal function in Arabidopsis (Arabidopsis thaliana). Using live-cell spinning disk confocal microscopy, we measured the motility of cellulose synthase (CESA)-containing complexes labeled by green fluorescent protein (GFP)-CESA3 and observed a reduced proportion of GFP-CESA3 particles colocalizing with microtubules upon stomatal closure. Imaging cellulose organization in guard cells revealed a relatively uniform distribution of cellulose in the open state and a more fibrillar pattern in the closed state, indicating that cellulose microfibrils undergo dynamic reorganization during stomatal movements. In cesa3(je5) mutants defective in cellulose synthesis and xxt1 xxt2 mutants lacking the hemicellulose xyloglucan, stomatal apertures, changes in guard cell length, and cellulose reorganization were aberrant during fusicoccin-induced stomatal opening or abscisic acid-induced stomatal closure, indicating that sufficient cellulose and xyloglucan are required for normal guard cell dynamics. Together, these results provide new insights into how guard cell walls allow stomata to function as responsive mediators of gas exchange at the plant surface.
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Affiliation(s)
- Yue Rui
- Department of Biology (Y.R., C.T.A.) and Center for Lignocellulose Structure and Formation (C.T.A.), Pennsylvania State University, University Park, Pennsylvania 16802
| | - Charles T Anderson
- Department of Biology (Y.R., C.T.A.) and Center for Lignocellulose Structure and Formation (C.T.A.), Pennsylvania State University, University Park, Pennsylvania 16802
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181
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Kohorn BD, Hoon D, Minkoff BB, Sussman MR, Kohorn SL. Rapid Oligo-Galacturonide Induced Changes in Protein Phosphorylation in Arabidopsis. Mol Cell Proteomics 2016; 15:1351-9. [PMID: 26811356 DOI: 10.1074/mcp.m115.055368] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Indexed: 11/06/2022] Open
Abstract
The wall-associated kinases (WAKs)(1)are receptor protein kinases that bind to long polymers of cross-linked pectin in the cell wall. These plasma-membrane-associated protein kinases also bind soluble pectin fragments called oligo-galacturonides (OGs) released from the wall after pathogen attack and damage. WAKs are required for cell expansion during development but bind water soluble OGs generated from walls with a higher affinity than the wall-associated polysaccharides. OGs activate a WAK-dependent, distinct stress-like response pathway to help plants resist pathogen attack. In this report, a quantitative mass-spectrometric-based phosphoproteomic analysis was used to identify Arabidopsis cellular events rapidly induced by OGsin planta Using N(14/)N(15)isotopicin vivometabolic labeling, we screened 1,000 phosphoproteins for rapid OG-induced changes and found 50 proteins with increased phosphorylation, while there were none that decreased significantly. Seven of the phosphosites within these proteins overlap with those altered by another signaling molecule plants use to indicate the presence of pathogens (the bacterial "elicitor" peptide Flg22), indicating distinct but overlapping pathways activated by these two types of chemicals. Genetic analysis of genes encoding 10 OG-specific and two Flg22/OG-induced phosphoproteins reveals that null mutations in eight proteins compromise the OG response. These phosphorylated proteins with genetic evidence supporting their role in the OG response include two cytoplasmic kinases, two membrane-associated scaffold proteins, a phospholipase C, a CDPK, an unknown cadmium response protein, and a motor protein. Null mutants in two proteins, the putative scaffold protein REM1.3, and a cytoplasmic receptor like kinase ROG2, enhance and suppress, respectively, a dominantWAKallele. Altogether, the results of these chemical and genetic experiments reveal the identity of several phosphorylated proteins involved in the kinase/phosphatase-mediated signaling pathway initiated by cell wall changes.
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Affiliation(s)
- Bruce D Kohorn
- From the ‡Biology Department, Bowdoin College, Brunswick, ME, 04011;
| | - Divya Hoon
- From the ‡Biology Department, Bowdoin College, Brunswick, ME, 04011
| | | | - Michael R Sussman
- §Department of Biochemistry, University of Wisconsin, Madison, WI 53706
| | - Susan L Kohorn
- From the ‡Biology Department, Bowdoin College, Brunswick, ME, 04011
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182
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Huang J, Chen F, Wu S, Li J, Xu W. Cotton GhMYB7 is predominantly expressed in developing fibers and regulates secondary cell wall biosynthesis in transgenic Arabidopsis. SCIENCE CHINA-LIFE SCIENCES 2016; 59:194-205. [PMID: 26803299 DOI: 10.1007/s11427-015-4991-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/20/2015] [Indexed: 12/25/2022]
Abstract
The secondary cell wall in mature cotton fibers contains over 90% cellulose with low quantities of xylan and lignin. However, little is known regarding the regulation of secondary cell wall biosynthesis in cotton fibers. In this study, we characterized an R2R3-MYB transcription factor, GhMYB7, in cotton. GhMYB7 is expressed at a high level in developing fibers and encodes a MYB protein that is targeted to the cell nucleus and has transcriptional activation activity. Ectopic expression of GhMYB7 in Arabidopsis resulted in small, curled, dark green leaves and also led to shorter inflorescence stems. A cross-sectional assay of basal stems revealed that cell wall thickness of vessels and interfascicular fibers was higher in transgenic lines overexpressing GhMYB7 than in the wild type. Constitutive expression of GhMYB7 in Arabidopsis activated the expression of a suite of secondary cell wall biosynthesis-related genes (including some secondary cell wall-associated transcription factors), leading to the ectopic deposition of cellulose and lignin. The ectopic deposition of secondary cell walls may have been initiated before the cessation of cell expansion. Moreover, GhMYB7 was capable of binding to the promoter regions of AtSND1 and AtCesA4, suggesting that GhMYB7 may function upstream of NAC transcription factors. Collectively, these findings suggest that GhMYB7 is a potential transcriptional activator, which may participate in regulating secondary cell wall biosynthesis of cotton fibers.
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Affiliation(s)
- Junfeng Huang
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Feng Chen
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Siyu Wu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Juan Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Wenliang Xu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China.
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183
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Bidhendi AJ, Geitmann A. Relating the mechanics of the primary plant cell wall to morphogenesis. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:449-61. [PMID: 26689854 DOI: 10.1093/jxb/erv535] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Regulation of the mechanical properties of the cell wall is a key parameter used by plants to control the growth behavior of individual cells and tissues. Modulation of the mechanical properties occurs through the control of the biochemical composition and the degree and nature of interlinking between cell wall polysaccharides. Preferentially oriented cellulose microfibrils restrict cellular expansive growth, but recent evidence suggests that this may not be the trigger for anisotropic growth. Instead, non-uniform softening through the modulation of pectin chemistry may be an initial step that precedes stress-induced stiffening of the wall through cellulose. Here we briefly review the major cell wall polysaccharides and their implication for plant cell wall mechanics that need to be considered in order to study the growth behavior of the primary plant cell wall.
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Affiliation(s)
- Amir J Bidhendi
- Institut de recherche en biologie végétale, Département de sciences biologiques, Université de Montréal, Montreal, Quebec H1X 2B2, Canada
| | - Anja Geitmann
- Institut de recherche en biologie végétale, Département de sciences biologiques, Université de Montréal, Montreal, Quebec H1X 2B2, Canada
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184
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Xiao C, Zhang T, Zheng Y, Cosgrove DJ, Anderson CT. Xyloglucan Deficiency Disrupts Microtubule Stability and Cellulose Biosynthesis in Arabidopsis, Altering Cell Growth and Morphogenesis. PLANT PHYSIOLOGY 2016; 170:234-49. [PMID: 26527657 PMCID: PMC4704587 DOI: 10.1104/pp.15.01395] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 10/29/2015] [Indexed: 05/18/2023]
Abstract
Xyloglucan constitutes most of the hemicellulose in eudicot primary cell walls and functions in cell wall structure and mechanics. Although Arabidopsis (Arabidopsis thaliana) xxt1 xxt2 mutants lacking detectable xyloglucan are viable, they display growth defects that are suggestive of alterations in wall integrity. To probe the mechanisms underlying these defects, we analyzed cellulose arrangement, microtubule patterning and dynamics, microtubule- and wall-integrity-related gene expression, and cellulose biosynthesis in xxt1 xxt2 plants. We found that cellulose is highly aligned in xxt1 xxt2 cell walls, that its three-dimensional distribution is altered, and that microtubule patterning and stability are aberrant in etiolated xxt1 xxt2 hypocotyls. We also found that the expression levels of microtubule-associated genes, such as MAP70-5 and CLASP, and receptor genes, such as HERK1 and WAK1, were changed in xxt1 xxt2 plants and that cellulose synthase motility is reduced in xxt1 xxt2 cells, corresponding with a reduction in cellulose content. Our results indicate that loss of xyloglucan affects both the stability of the microtubule cytoskeleton and the production and patterning of cellulose in primary cell walls. These findings establish, to our knowledge, new links between wall integrity, cytoskeletal dynamics, and wall synthesis in the regulation of plant morphogenesis.
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Affiliation(s)
- Chaowen Xiao
- Center for Lignocellulose Structure and Formation (C.X., T.Z., Y.Z., D.J.C., C.T.A.) and Department of Biology (C.X., T.Z., D.J.C., C.T.A.), The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Tian Zhang
- Center for Lignocellulose Structure and Formation (C.X., T.Z., Y.Z., D.J.C., C.T.A.) and Department of Biology (C.X., T.Z., D.J.C., C.T.A.), The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Yunzhen Zheng
- Center for Lignocellulose Structure and Formation (C.X., T.Z., Y.Z., D.J.C., C.T.A.) and Department of Biology (C.X., T.Z., D.J.C., C.T.A.), The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Daniel J Cosgrove
- Center for Lignocellulose Structure and Formation (C.X., T.Z., Y.Z., D.J.C., C.T.A.) and Department of Biology (C.X., T.Z., D.J.C., C.T.A.), The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Charles T Anderson
- Center for Lignocellulose Structure and Formation (C.X., T.Z., Y.Z., D.J.C., C.T.A.) and Department of Biology (C.X., T.Z., D.J.C., C.T.A.), The Pennsylvania State University, University Park, Pennsylvania 16802
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Slovak R, Ogura T, Satbhai SB, Ristova D, Busch W. Genetic control of root growth: from genes to networks. ANNALS OF BOTANY 2016; 117:9-24. [PMID: 26558398 PMCID: PMC4701154 DOI: 10.1093/aob/mcv160] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 08/28/2015] [Indexed: 05/08/2023]
Abstract
BACKGROUND Roots are essential organs for higher plants. They provide the plant with nutrients and water, anchor the plant in the soil, and can serve as energy storage organs. One remarkable feature of roots is that they are able to adjust their growth to changing environments. This adjustment is possible through mechanisms that modulate a diverse set of root traits such as growth rate, diameter, growth direction and lateral root formation. The basis of these traits and their modulation are at the cellular level, where a multitude of genes and gene networks precisely regulate development in time and space and tune it to environmental conditions. SCOPE This review first describes the root system and then presents fundamental work that has shed light on the basic regulatory principles of root growth and development. It then considers emerging complexities and how they have been addressed using systems-biology approaches, and then describes and argues for a systems-genetics approach. For reasons of simplicity and conciseness, this review is mostly limited to work from the model plant Arabidopsis thaliana, in which much of the research in root growth regulation at the molecular level has been conducted. CONCLUSIONS While forward genetic approaches have identified key regulators and genetic pathways, systems-biology approaches have been successful in shedding light on complex biological processes, for instance molecular mechanisms involving the quantitative interaction of several molecular components, or the interaction of large numbers of genes. However, there are significant limitations in many of these methods for capturing dynamic processes, as well as relating these processes to genotypic and phenotypic variation. The emerging field of systems genetics promises to overcome some of these limitations by linking genotypes to complex phenotypic and molecular data using approaches from different fields, such as genetics, genomics, systems biology and phenomics.
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Affiliation(s)
- Radka Slovak
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna Biocenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Takehiko Ogura
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna Biocenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Santosh B Satbhai
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna Biocenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Daniela Ristova
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna Biocenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Wolfgang Busch
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna Biocenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria
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187
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Visualization of microbe-dietary remnant interactions in digesta from pigs, by fluorescence in situ hybridization and staining methods; effects of a dietary arabinoxylan-rich wheat fraction. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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188
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Castro A, Vidal S, Ponce de León I. Moss Pathogenesis-Related-10 Protein Enhances Resistance to Pythium irregulare in Physcomitrella patens and Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2016; 7:580. [PMID: 27200053 PMCID: PMC4850436 DOI: 10.3389/fpls.2016.00580] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 04/14/2016] [Indexed: 05/09/2023]
Abstract
Plants respond to pathogen infection by activating signaling pathways leading to the accumulation of proteins with diverse roles in defense. Here, we addressed the functional role of PpPR-10, a pathogenesis-related (PR)-10 gene, of the moss Physcomitrella patens, in response to biotic stress. PpPR-10 belongs to a multigene family and encodes a protein twice the usual size of PR-10 proteins due to the presence of two Bet v1 domains. Moss PR-10 genes are differentially regulated during development and inoculation with the fungal pathogen Botrytis cinerea. Specifically, PpPR-10 transcript levels increase significantly by treatments with elicitors of Pectobacterium carotovorum subsp. carotovorum, spores of B. cinerea, and the defense hormone salicylic acid. To characterize the role of PpPR-10 in plant defense against pathogens, we conducted overexpression analysis in P. patens and in Arabidopsis thaliana. We demonstrate that constitutive expression of PpPR-10 in moss tissues increased resistance against the oomycete Pythium irregulare. PpPR-10 overexpressing moss plants developed less symptoms and decreased mycelium growth than wild type plants. In addition, PpPR-10 overexpressing plants constitutively produced cell wall depositions in protonemal tissue. Ectopic expression of PpPR-10 in Arabidopsis resulted in increased resistance against P. irregulare as well, evidenced by smaller lesions and less cellular damage compared to wild type plants. These results indicate that PpPR-10 is functionally active in the defense against the pathogen P. irregulare, in both P. patens and Arabidopsis, two evolutionary distant plants. Thus, P. patens can serve as an interesting source of genes to improve resistance against pathogen infection in flowering plants.
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Affiliation(s)
- Alexandra Castro
- Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente EstableMontevideo, Uruguay
- Laboratorio de Biología Molecular Vegetal, Facultad de Ciencias, Universidad de la RepúblicaMontevideo, Uruguay
| | - Sabina Vidal
- Laboratorio de Biología Molecular Vegetal, Facultad de Ciencias, Universidad de la RepúblicaMontevideo, Uruguay
| | - Inés Ponce de León
- Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente EstableMontevideo, Uruguay
- *Correspondence: Inés Ponce de León,
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189
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Balcerowicz D, Schoenaers S, Vissenberg K. Cell Fate Determination and the Switch from Diffuse Growth to Planar Polarity in Arabidopsis Root Epidermal Cells. FRONTIERS IN PLANT SCIENCE 2015; 6:1163. [PMID: 26779192 PMCID: PMC4688357 DOI: 10.3389/fpls.2015.01163] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 12/07/2015] [Indexed: 05/19/2023]
Abstract
Plant roots fulfill important functions as they serve in water and nutrient uptake, provide anchorage of the plant body in the soil and in some species form the site of symbiotic interactions with soil-living biota. Root hairs, tubular-shaped outgrowths of specific epidermal cells, significantly increase the root's surface area and aid in these processes. In this review we focus on the molecular mechanisms that determine the hair and non-hair cell fate of epidermal cells and that define the site on the epidermal cell where the root hair will be initiated (=planar polarity determination). In the model plant Arabidopsis, trichoblast and atrichoblast cell fate results from intra- and intercellular position-dependent signaling and from complex feedback loops that ultimately regulate GL2 expressing and non-expressing cells. When epidermal cells reach the end of the root expansion zone, root hair promoting transcription factors dictate the establishment of polarity within epidermal cells followed by the selection of the root hair initiation site at the more basal part of the trichoblast. Molecular players in the abovementioned processes as well as the role of phytohormones are discussed, and open areas for future experiments are identified.
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Affiliation(s)
| | | | - Kris Vissenberg
- Integrated Molecular Plant Physiology Research, Department Biology, University of AntwerpAntwerpen, Belgium
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190
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Identification of MEDIATOR16 as the Arabidopsis COBRA suppressor MONGOOSE1. Proc Natl Acad Sci U S A 2015; 112:16048-53. [PMID: 26655738 DOI: 10.1073/pnas.1521675112] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
We performed a screen for genetic suppressors of cobra, an Arabidopsis mutant with defects in cellulose formation and an increased ratio of unesterified/esterified pectin. We identified a suppressor named mongoose1 (mon1) that suppressed the growth defects of cobra, partially restored cellulose levels, and restored the esterification ratio of pectin to wild-type levels. mon1 was mapped to the MEDIATOR16 (MED16) locus, a tail mediator subunit, also known as SENSITIVE TO FREEZING6 (SFR6). When separated from the cobra mutation, mutations in MED16 caused resistance to cellulose biosynthesis inhibitors, consistent with their ability to suppress the cobra cellulose deficiency. Transcriptome analysis revealed that a number of cell wall genes are misregulated in med16 mutants. Two of these genes encode pectin methylesterase inhibitors, which, when ectopically expressed, partially suppressed the cobra phenotype. This suggests that cellulose biosynthesis can be affected by the esterification levels of pectin, possibly through modifying cell wall integrity or the interaction of pectin and cellulose.
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191
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Slabaugh E, Scavuzzo-Duggan T, Chaves A, Wilson L, Wilson C, Davis JK, Cosgrove DJ, Anderson CT, Roberts AW, Haigler CH. The valine and lysine residues in the conserved FxVTxK motif are important for the function of phylogenetically distant plant cellulose synthases. Glycobiology 2015; 26:509-19. [PMID: 26646446 DOI: 10.1093/glycob/cwv118] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/01/2015] [Indexed: 01/20/2023] Open
Abstract
Cellulose synthases (CESAs) synthesize the β-1,4-glucan chains that coalesce to form cellulose microfibrils in plant cell walls. In addition to a large cytosolic (catalytic) domain, CESAs have eight predicted transmembrane helices (TMHs). However, analogous to the structure of BcsA, a bacterial CESA, predicted TMH5 in CESA may instead be an interfacial helix. This would place the conserved FxVTxK motif in the plant cell cytosol where it could function as a substrate-gating loop as occurs in BcsA. To define the functional importance of the CESA region containing FxVTxK, we tested five parallel mutations in Arabidopsis thaliana CESA1 and Physcomitrella patens CESA5 in complementation assays of the relevant cesa mutants. In both organisms, the substitution of the valine or lysine residues in FxVTxK severely affected CESA function. In Arabidopsis roots, both changes were correlated with lower cellulose anisotropy, as revealed by Pontamine Fast Scarlet. Analysis of hypocotyl inner cell wall layers by atomic force microscopy showed that two altered versions of Atcesa1 could rescue cell wall phenotypes observed in the mutant background line. Overall, the data show that the FxVTxK motif is functionally important in two phylogenetically distant plant CESAs. The results show that Physcomitrella provides an efficient model for assessing the effects of engineered CESA mutations affecting primary cell wall synthesis and that diverse testing systems can lead to nuanced insights into CESA structure-function relationships. Although CESA membrane topology needs to be experimentally determined, the results support the possibility that the FxVTxK region functions similarly in CESA and BcsA.
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Affiliation(s)
- Erin Slabaugh
- Department of Crop Science and Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA
| | - Tess Scavuzzo-Duggan
- Department of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Arielle Chaves
- Department of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Liza Wilson
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Carmen Wilson
- Department of Crop Science and Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA
| | - Jonathan K Davis
- Department of Crop Science and Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA
| | - Daniel J Cosgrove
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Charles T Anderson
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Alison W Roberts
- Department of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Candace H Haigler
- Department of Crop Science and Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA
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192
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Dumont M, Lehner A, Bardor M, Burel C, Vauzeilles B, Lerouxel O, Anderson CT, Mollet JC, Lerouge P. Inhibition of fucosylation of cell wall components by 2-fluoro 2-deoxy-L-fucose induces defects in root cell elongation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2015; 84:1137-51. [PMID: 26565655 DOI: 10.1111/tpj.13071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 10/26/2015] [Accepted: 11/03/2015] [Indexed: 05/21/2023]
Abstract
Screening of commercially available fluoro monosaccharides as putative growth inhibitors in Arabidopsis thaliana revealed that 2-fluoro 2-l-fucose (2F-Fuc) reduces root growth at micromolar concentrations. The inability of 2F-Fuc to affect an Atfkgp mutant that is defective in the fucose salvage pathway indicates that 2F-Fuc must be converted to its cognate GDP nucleotide sugar in order to inhibit root growth. Chemical analysis of cell wall polysaccharides and glycoproteins demonstrated that fucosylation of xyloglucans and of N-linked glycans is fully inhibited by 10 μm 2F-Fuc in Arabidopsis seedling roots, but genetic evidence indicates that these alterations are not responsible for the inhibition of root development by 2F-Fuc. Inhibition of fucosylation of cell wall polysaccharides also affected pectic rhamnogalacturonan-II (RG-II). At low concentrations, 2F-Fuc induced a decrease in RG-II dimerization. Both RG-II dimerization and root growth were partially restored in 2F-Fuc-treated seedlings by addition of boric acid, suggesting that the growth phenotype caused by 2F-Fuc was due to a deficiency of RG-II dimerization. Closer investigation of the 2F-Fuc-induced growth phenotype demonstrated that cell division is not affected by 2F-Fuc treatments. In contrast, the inhibitor suppressed elongation of root cells and promoted the emergence of adventitious roots. This study further emphasizes the importance of RG-II in cell elongation and the utility of glycosyltransferase inhibitors as new tools for studying the functions of cell wall polysaccharides in plant development. Moreover, supplementation experiments with borate suggest that the function of boron in plants might not be restricted to RG-II cross-linking, but that it might also be a signal molecule in the cell wall integrity-sensing mechanism.
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Affiliation(s)
- Marie Dumont
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Arnaud Lehner
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Muriel Bardor
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Carole Burel
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Boris Vauzeilles
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) UMR CNRS 8182, Université de Paris Sud, 91405, Orsay, France
- Institut de Chimie des Substances Naturelles (ICSN) UPR CNRS 2301, 91198, Gif-sur-Yvette, France
- Click4Tag, Zone Luminy Biotech, Case 922, 163 Avenue de Luminy, 13009, Marseille, France
| | - Olivier Lerouxel
- Centre de Recherches sur les Macromolécules Végétales (CERMAV) - CNRS BP 53, 38041, Grenoble Cedex 9, France
| | - Charles T Anderson
- Department of Biology and Center for Lignocellulose Structure and Formation, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Jean-Claude Mollet
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
| | - Patrice Lerouge
- Laboratoire Glycobiologie et Matrice Extracellulaire Végétale, EA 4358, IRIB, VASI, Normandie Université, 76821, Mont-Saint-Aignan, France
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193
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Jensen OE, Fozard JA. Multiscale models in the biomechanics of plant growth. Physiology (Bethesda) 2015; 30:159-66. [PMID: 25729061 DOI: 10.1152/physiol.00030.2014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Plant growth occurs through the coordinated expansion of tightly adherent cells, driven by regulated softening of cell walls. It is an intrinsically multiscale process, with the integrated properties of multiple cell walls shaping the whole tissue. Multiscale models encode physical relationships to bring new understanding to plant physiology and development.
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Affiliation(s)
- Oliver E Jensen
- School of Mathematics, University of Manchester, Manchester, United Kingdom; and
| | - John A Fozard
- Centre for Plant Integrative Biology, School of Biosciences, University of Nottingham, Sutton Bonington, United Kingdom
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194
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Voiniciuc C, Schmidt MHW, Berger A, Yang B, Ebert B, Scheller HV, North HM, Usadel B, Günl M. MUCILAGE-RELATED10 Produces Galactoglucomannan That Maintains Pectin and Cellulose Architecture in Arabidopsis Seed Mucilage. PLANT PHYSIOLOGY 2015; 169:403-420. [PMID: 26220953 PMCID: PMC4577422 DOI: 10.1104/pp.15.00851] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 07/23/2015] [Indexed: 05/17/2023]
Abstract
Plants invest a lot of their resources into the production of an extracellular matrix built of polysaccharides. While the composition of the cell wall is relatively well characterized, the functions of the individual polymers and the enzymes that catalyze their biosynthesis remain poorly understood. We exploited the Arabidopsis (Arabidopsis thaliana) seed coat epidermis (SCE) to study cell wall synthesis. SCE cells produce mucilage, a specialized secondary wall that is rich in pectin, at a precise stage of development. A coexpression search for MUCILAGE-RELATED (MUCI) genes identified MUCI10 as a key determinant of mucilage properties. MUCI10 is closely related to a fenugreek (Trigonella foenumgraecum) enzyme that has in vitro galactomannan α-1,6-galactosyltransferase activity. Our detailed analysis of the muci10 mutants demonstrates that mucilage contains highly branched galactoglucomannan (GGM) rather than unbranched glucomannan. MUCI10 likely decorates glucomannan, synthesized by CELLULOSE SYNTHASE-LIKE A2, with galactose residues in vivo. The degree of galactosylation is essential for the synthesis of the GGM backbone, the structure of cellulose, mucilage density, as well as the adherence of pectin. We propose that GGM scaffolds control mucilage architecture along with cellulosic rays and show that Arabidopsis SCE cells represent an excellent model in which to study the synthesis and function of GGM. Arabidopsis natural varieties with defects similar to muci10 mutants may reveal additional genes involved in GGM synthesis. Since GGM is the most abundant hemicellulose in the secondary walls of gymnosperms, understanding its biosynthesis may facilitate improvements in the production of valuable commodities from softwoods.
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Affiliation(s)
- Cătălin Voiniciuc
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Maximilian Heinrich-Wilhelm Schmidt
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Adeline Berger
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Bo Yang
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Berit Ebert
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Henrik V Scheller
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Helen M North
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Björn Usadel
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
| | - Markus Günl
- Institute for Biosciences and Geosciences (Plant Sciences), Forschungszentrum Jülich, 52425 Juelich, Germany (C.V., M.H.-W.S., B.U., M.G.);Institute for Botany and Molecular Genetics, BioEconomy Science Center, RWTH Aachen University, 52056 Aachen, Germany (C.V., M.H.-W.S., B.Y., B.U.);Institut National de la Recherche Agronomique and AgroParisTech, Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318, ERL Centre National de la Recherche Scientifique 3559, Saclay Plant Sciences, F-78026 Versailles, France (A.B., H.M.N.);Joint BioEnergy Institute and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702 (B.E., H.V.S.); andDepartment of Plant and Microbial Biology, University of California, Berkeley, California 94720 (H.V.S.)
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195
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Luo Y, Scholl S, Doering A, Zhang Y, Irani NG, Rubbo SD, Neumetzler L, Krishnamoorthy P, Van Houtte I, Mylle E, Bischoff V, Vernhettes S, Winne J, Friml J, Stierhof YD, Schumacher K, Persson S, Russinova E. V-ATPase activity in the TGN/EE is required for exocytosis and recycling in Arabidopsis. NATURE PLANTS 2015; 1:15094. [PMID: 27250258 PMCID: PMC4905525 DOI: 10.1038/nplants.2015.94] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 06/03/2015] [Indexed: 05/18/2023]
Abstract
In plants, vacuolar H(+)-ATPase (V-ATPase) activity acidifies both the trans-Golgi network/early endosome (TGN/EE) and the vacuole. This dual V-ATPase function has impeded our understanding of how the pH homeostasis within the plant TGN/EE controls exo- and endocytosis. Here, we show that the weak V-ATPase mutant deetiolated3 (det3) displayed a pH increase in the TGN/EE, but not in the vacuole, strongly impairing secretion and recycling of the brassinosteroid receptor and the cellulose synthase complexes to the plasma membrane, in contrast to mutants lacking tonoplast-localized V-ATPase activity only. The brassinosteroid insensitivity and the cellulose deficiency defects in det3 were tightly correlated with reduced Golgi and TGN/EE motility. Thus, our results provide strong evidence that acidification of the TGN/EE, but not of the vacuole, is indispensable for functional secretion and recycling in plants.
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Affiliation(s)
- Yu Luo
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Stefan Scholl
- Developmental Biology of Plants, Centre for Organismal Studies (COS), Heidelberg University, 69120 Heidelberg, Germany
| | - Anett Doering
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany
| | - Yi Zhang
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany
| | - Niloufer G. Irani
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Simone Di Rubbo
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Lutz Neumetzler
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany
| | | | - Isabelle Van Houtte
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Evelien Mylle
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Volker Bischoff
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1318, Institut Jean-Pierre Bourgin, Saclay Plant Sciences, 78000 Versailles, France
- AgroParisTech,Institut Jean-Pierre Bourgin, 78000 Versailles, France
| | - Samantha Vernhettes
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1318, Institut Jean-Pierre Bourgin, Saclay Plant Sciences, 78000 Versailles, France
- AgroParisTech,Institut Jean-Pierre Bourgin, 78000 Versailles, France
| | - Johan Winne
- Department of Organic Chemistry, Polymer Chemistry Research Group and Laboratory for Organic Synthesis, Ghent University, 9000 Gent, Belgium
| | - Jiří Friml
- Institute of Science and Technology Austria (IST Austria), 3400 Klosterneuburg, Austria
| | - York-Dieter Stierhof
- Center for Plant Molecular Biology (ZMBP), University of Tübingen, 72076 Tübingen, Germany
| | - Karin Schumacher
- Developmental Biology of Plants, Centre for Organismal Studies (COS), Heidelberg University, 69120 Heidelberg, Germany
- , , and
| | - Staffan Persson
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany
- Australian Research Council, Centre of Excellence in Plant Cell Walls, School of Botany, University of Melbourne, Parkville, Victoria 3010, Australia
- , , and
| | - Eugenia Russinova
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- , , and
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196
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Drakakaki G. Polysaccharide deposition during cytokinesis: Challenges and future perspectives. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 236:177-84. [PMID: 26025531 DOI: 10.1016/j.plantsci.2015.03.018] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Revised: 03/25/2015] [Accepted: 03/26/2015] [Indexed: 05/18/2023]
Abstract
De novo formation of a new cell wall partitions the cytoplasm of the dividing cell during plant cytokinesis. The development of the cell plate, a transient sheet-like structure, requires the accumulation of vesicles directed by the phragmoplast to the cell plate assembly matrix. Fusion and fission of the accumulated vesicles are accompanied by the deposition of polysaccharides and cell wall structural proteins; together, they are leading to the stabilization of the formed structure which after insertion into the parental wall lead to the maturation of the nascent cross wall. Callose is the most abundant polysaccharide during cell plate formation and during maturation is gradually replaced by cellulose. Matrix polysaccharides such as hemicellulose, and pectins presumably are present throughout all developmental stages, being delivered to the cell plate by secretory vesicles. The availability of novel chemical probes such as endosidin 7, which inhibits callose formation at the cell plate, has proved useful for dissecting the temporal accumulation of vesicles at the cell plate and establishing the critical role of callose during cytokinesis. The use of emerging approaches such as chemical genomics combined with live cell imaging; novel techniques of polysaccharide detection including tagged polysaccharide substrates, newly characterized polysaccharide antibodies and vesicle proteomics can be used to develop a comprehensive model of cell plate development.
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Affiliation(s)
- Georgia Drakakaki
- Department of Plant Sciences, University of California, One Shields Avenue, Davis, CA 95616, United States.
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197
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Griffiths JS, Šola K, Kushwaha R, Lam P, Tateno M, Young R, Voiniciuc C, Dean G, Mansfield SD, DeBolt S, Haughn GW. Unidirectional movement of cellulose synthase complexes in Arabidopsis seed coat epidermal cells deposit cellulose involved in mucilage extrusion, adherence, and ray formation. PLANT PHYSIOLOGY 2015; 168:502-20. [PMID: 25926481 PMCID: PMC4453796 DOI: 10.1104/pp.15.00478] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Accepted: 04/28/2015] [Indexed: 05/17/2023]
Abstract
Cellulose synthase5 (CESA5) synthesizes cellulose necessary for seed mucilage adherence to seed coat epidermal cells of Arabidopsis (Arabidopsis thaliana). The involvement of additional CESA proteins in this process and details concerning the manner in which cellulose is deposited in the mucilage pocket are unknown. Here, we show that both CESA3 and CESA10 are highly expressed in this cell type at the time of mucilage synthesis and localize to the plasma membrane adjacent to the mucilage pocket. The isoxaben resistant1-1 and isoxaben resistant1-2 mutants affecting CESA3 show defects consistent with altered mucilage cellulose biosynthesis. CESA3 can interact with CESA5 in vitro, and green fluorescent protein-tagged CESA5, CESA3, and CESA10 proteins move in a linear, unidirectional fashion around the cytoplasmic column of the cell, parallel with the surface of the seed, in a pattern similar to that of cortical microtubules. Consistent with this movement, cytological evidence suggests that the mucilage is coiled around the columella and unwinds during mucilage extrusion to form a linear ray. Mutations in CESA5 and CESA3 affect the speed of mucilage extrusion and mucilage adherence. These findings imply that cellulose fibrils are synthesized in an ordered helical array around the columella, providing a distinct structure to the mucilage that is important for both mucilage extrusion and adherence.
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Affiliation(s)
- Jonathan S Griffiths
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Krešimir Šola
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Rekha Kushwaha
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Patricia Lam
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Mizuki Tateno
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Robin Young
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Cătălin Voiniciuc
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Gillian Dean
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Shawn D Mansfield
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - Seth DeBolt
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
| | - George W Haughn
- Department of Botany (J.S.G., K.Š., P.L., R.Y., C.V., G.D., G.W.H.) and Department of Wood Science (S.D.M.), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4; andDepartment of Horticulture Plant Physiology/Biochemistry/Molecular Biology Program (R.K., M.T., S.D.) and University of Kentucky Seed Biology Group (R.K., M.T., S.D.), University of Kentucky, Lexington, Kentucky 40546
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198
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Digiuni S, Berne-Dedieu A, Martinez-Torres C, Szecsi J, Bendahmane M, Arneodo A, Argoul F. Single Cell Wall Nonlinear Mechanics Revealed by a Multiscale Analysis of AFM Force-Indentation Curves. Biophys J 2015; 108:2235-48. [PMID: 25954881 PMCID: PMC4423067 DOI: 10.1016/j.bpj.2015.02.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 01/28/2015] [Accepted: 02/12/2015] [Indexed: 10/23/2022] Open
Abstract
Individual plant cells are rather complex mechanical objects. Despite the fact that their wall mechanical strength may be weakened by comparison with their original tissue template, they nevertheless retain some generic properties of the mother tissue, namely the viscoelasticity and the shape of their walls, which are driven by their internal hydrostatic turgor pressure. This viscoelastic behavior, which affects the power-law response of these cells when indented by an atomic force cantilever with a pyramidal tip, is also very sensitive to the culture media. To our knowledge, we develop here an original analyzing method, based on a multiscale decomposition of force-indentation curves, that reveals and quantifies for the first time the nonlinearity of the mechanical response of living single plant cells upon mechanical deformation. Further comparing the nonlinear strain responses of these isolated cells in three different media, we reveal an alteration of their linear bending elastic regime in both hyper- and hypotonic conditions.
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Affiliation(s)
- Simona Digiuni
- Centre National de la Recherche Scientifique UMR5672, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, Université de Lyon I, France
| | - Annik Berne-Dedieu
- Centre National de la Recherche Scientifique UMR5667, Laboratoire de Reproduction et de Développement des Plantes, Ecole Normale Supérieure de Lyon, Université de Lyon I, France
| | - Cristina Martinez-Torres
- Centre National de la Recherche Scientifique UMR5672, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, Université de Lyon I, France
| | - Judit Szecsi
- Centre National de la Recherche Scientifique UMR5667, Laboratoire de Reproduction et de Développement des Plantes, Ecole Normale Supérieure de Lyon, Université de Lyon I, France
| | - Mohammed Bendahmane
- Centre National de la Recherche Scientifique UMR5667, Laboratoire de Reproduction et de Développement des Plantes, Ecole Normale Supérieure de Lyon, Université de Lyon I, France
| | - Alain Arneodo
- Centre National de la Recherche Scientifique UMR5672, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, Université de Lyon I, France
| | - Françoise Argoul
- Centre National de la Recherche Scientifique UMR5672, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, Université de Lyon I, France.
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199
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Measuring the Mechanical Properties of Plant Cell Walls. PLANTS 2015; 4:167-82. [PMID: 27135321 PMCID: PMC4844320 DOI: 10.3390/plants4020167] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/05/2015] [Accepted: 03/11/2015] [Indexed: 11/21/2022]
Abstract
The size, shape and stability of a plant depend on the flexibility and integrity of its cell walls, which, at the same time, need to allow cell expansion for growth, while maintaining mechanical stability. Biomechanical studies largely vanished from the focus of plant science with the rapid progress of genetics and molecular biology since the mid-twentieth century. However, the development of more sensitive measurement tools renewed the interest in plant biomechanics in recent years, not only to understand the fundamental concepts of growth and morphogenesis, but also with regard to economically important areas in agriculture, forestry and the paper industry. Recent advances have clearly demonstrated that mechanical forces play a crucial role in cell and organ morphogenesis, which ultimately define plant morphology. In this article, we will briefly review the available methods to determine the mechanical properties of cell walls, such as atomic force microscopy (AFM) and microindentation assays, and discuss their advantages and disadvantages. But we will focus on a novel methodological approach, called cellular force microscopy (CFM), and its automated successor, real-time CFM (RT-CFM).
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200
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Ben-Tov D, Abraham Y, Stav S, Thompson K, Loraine A, Elbaum R, de Souza A, Pauly M, Kieber JJ, Harpaz-Saad S. COBRA-LIKE2, a member of the glycosylphosphatidylinositol-anchored COBRA-LIKE family, plays a role in cellulose deposition in arabidopsis seed coat mucilage secretory cells. PLANT PHYSIOLOGY 2015; 167:711-24. [PMID: 25583925 PMCID: PMC4347734 DOI: 10.1104/pp.114.240671] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 12/24/2014] [Indexed: 05/17/2023]
Abstract
Differentiation of the maternally derived seed coat epidermal cells into mucilage secretory cells is a common adaptation in angiosperms. Recent studies identified cellulose as an important component of seed mucilage in various species. Cellulose is deposited as a set of rays that radiate from the seed upon mucilage extrusion, serving to anchor the pectic component of seed mucilage to the seed surface. Using transcriptome data encompassing the course of seed development, we identified COBRA-LIKE2 (COBL2), a member of the glycosylphosphatidylinositol-anchored COBRA-LIKE gene family in Arabidopsis (Arabidopsis thaliana), as coexpressed with other genes involved in cellulose deposition in mucilage secretory cells. Disruption of the COBL2 gene results in substantial reduction in the rays of cellulose present in seed mucilage, along with an increased solubility of the pectic component of the mucilage. Light birefringence demonstrates a substantial decrease in crystalline cellulose deposition into the cellulosic rays of the cobl2 mutants. Moreover, crystalline cellulose deposition into the radial cell walls and the columella appears substantially compromised, as demonstrated by scanning electron microscopy and in situ quantification of light birefringence. Overall, the cobl2 mutants display about 40% reduction in whole-seed crystalline cellulose content compared with the wild type. These data establish that COBL2 plays a role in the deposition of crystalline cellulose into various secondary cell wall structures during seed coat epidermal cell differentiation.
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Affiliation(s)
- Daniela Ben-Tov
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Yael Abraham
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Shira Stav
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Kevin Thompson
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Ann Loraine
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Rivka Elbaum
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Amancio de Souza
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Markus Pauly
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Joseph J Kieber
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
| | - Smadar Harpaz-Saad
- Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Hebrew University, Rehovot 76100, Israel (D.B.-T., Y.A., R.E., S.H.-S.);Department of Bioinformatics and Genomics, University of North Carolina, Kannapolis, North Carolina 28081 (S.S., K.T., A.L.);Energy Biosciences Institute (A.d.S., M.P.) and Department of Plant and Microbial Biology (M.P.), University of California, Berkeley, California 94720; andBiology Department, University of North Carolina, Chapel Hill, North Carolina 27599 (J.J.K.)
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