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Keret R, Drew DM, Hills PN. Xylem cell size regulation is a key adaptive response to water deficit in Eucalyptus grandis. TREE PHYSIOLOGY 2024; 44:tpae068. [PMID: 38896029 PMCID: PMC11247191 DOI: 10.1093/treephys/tpae068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 06/06/2024] [Accepted: 06/18/2024] [Indexed: 06/21/2024]
Abstract
Future climatic scenarios forecast increasingly frequent droughts that will pose substantial consequences on tree mortality. In light of this, drought-tolerant eucalypts have been propagated; however, the severity of these conditions will invoke adaptive responses, impacting the commercially valuable wood properties. To determine what mechanisms govern the wood anatomical adaptive response, highly controlled drought experiments were conducted in Eucalyptus grandis W. Hill ex Maiden, with the tree physiology and transcriptome closely monitored. In response to water deficit, E. grandis displays an isohydric stomatal response to conserve water and enable stem growth to continue, albeit at a reduced rate. Maintaining gaseous exchange is likely a critical short-term response that drives the formation of hydraulically safer xylem. For instance, the development of significantly smaller fibers and vessels was found to increase cellular density, thereby promoting drought tolerance through improved functional redundancy, as well as implosion and cavitation resistance. The transcriptome was explored to identify the molecular mechanisms responsible for controlling xylem cell size during prolonged water deficit. Downregulation of genes associated with cell wall remodeling and the biosynthesis of cellulose, hemicellulose and pectin appeared to coincide with a reduction in cellular enlargement during drought. Furthermore, transcript levels of NAC and MYB transcription factors, vital for cell wall component biosynthesis, were reduced, while those linked to lignification increased. The upregulation of EgCAD and various peroxidases under water deficit did not correlate with an increased lignin composition. However, with the elevated cellular density, a higher lignin content per xylem cross-sectional area was observed, potentially enhancing hydraulic safety. These results support the requirement for higher density, drought-adapted wood as a long-term adaptive response in E. grandis, which is largely influenced by the isohydric stomatal response coupled with cellular expansion-related molecular processes.
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Affiliation(s)
- Rafael Keret
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa
- Department of Forestry and Wood Sciences, Stellenbosch University, Bosman St, Stellenbosch 7599, South Africa
| | - David M Drew
- Department of Forestry and Wood Sciences, Stellenbosch University, Bosman St, Stellenbosch 7599, South Africa
| | - Paul N Hills
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa
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2
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Keret R, Schliephack PM, Stangler DF, Seifert T, Kahle HP, Drew DM, Hills PN. An open-source machine-learning approach for obtaining high-quality quantitative wood anatomy data from E. grandis and P. radiata xylem. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 340:111970. [PMID: 38163623 DOI: 10.1016/j.plantsci.2023.111970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/26/2023] [Accepted: 12/27/2023] [Indexed: 01/03/2024]
Abstract
Quantitative wood anatomy is a subfield in dendrochronology that requires effective open-source image analysis tools. In this research, the bioimage analysis software QuPath (v0.4.4) is introduced as a candidate for accurately quantifying the cellular properties of the xylem in an automated manner. Additionally, the potential of QuPath to detect the transition of early- to latewood tracheids over the growing season was evaluated to assess a potential application in dendroecological studies. Various algorithms in QuPath were optimized to quantify different xylem cell types in Eucalyptus grandis and the transition of early- to latewood tracheids in Pinus radiata. These algorithms were coded into cell detection scripts for automatic quantification of stem microsections and compared to a manually curated method to assess the accuracy of the cell detections. The automatic cell detection approach, using QuPath, has been validated to be reproducible with an acceptable error when assessing fibers, vessels, early- and latewood tracheids. However, further optimization for parenchyma is still required. This proposed method developed in QuPath provides a scalable and accurate approach for quantifying anatomical features in stem microsections. With minor amendments to the detection and classification algorithms, this strategy is likely to be viable in other plant species.
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Affiliation(s)
- Rafael Keret
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland 7602, Stellenbosch, South Africa; Department of Forestry and Wood Sciences, Stellenbosch University, Bosman St, 7599, Stellenbosch central, South Africa
| | - Paul M Schliephack
- Chair of Forest Growth and Dendroecology, Institute of Forest Sciences, University of Freiburg, Tennenbacher Str. 4, Freiburg im Breisgau, Germany
| | - Dominik F Stangler
- Chair of Forest Growth and Dendroecology, Institute of Forest Sciences, University of Freiburg, Tennenbacher Str. 4, Freiburg im Breisgau, Germany
| | - Thomas Seifert
- Department of Forestry and Wood Sciences, Stellenbosch University, Bosman St, 7599, Stellenbosch central, South Africa; Chair of Forest Growth and Dendroecology, Institute of Forest Sciences, University of Freiburg, Tennenbacher Str. 4, Freiburg im Breisgau, Germany
| | - Hans-Peter Kahle
- Chair of Forest Growth and Dendroecology, Institute of Forest Sciences, University of Freiburg, Tennenbacher Str. 4, Freiburg im Breisgau, Germany
| | - David M Drew
- Department of Forestry and Wood Sciences, Stellenbosch University, Bosman St, 7599, Stellenbosch central, South Africa.
| | - Paul N Hills
- Institute for Plant Biotechnology, Department of Genetics, Stellenbosch University, Private Bag X1, Matieland 7602, Stellenbosch, South Africa
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Kairouani A, Pontier D, Picart C, Mounet F, Martinez Y, Le-Bot L, Fanuel M, Hammann P, Belmudes L, Merret R, Azevedo J, Carpentier MC, Gagliardi D, Couté Y, Sibout R, Bies-Etheve N, Lagrange T. Cell-type-specific control of secondary cell wall formation by Musashi-type translational regulators in Arabidopsis. eLife 2023; 12:RP88207. [PMID: 37773033 PMCID: PMC10541177 DOI: 10.7554/elife.88207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023] Open
Abstract
Deciphering the mechanism of secondary cell wall/SCW formation in plants is key to understanding their development and the molecular basis of biomass recalcitrance. Although transcriptional regulation is essential for SCW formation, little is known about the implication of post-transcriptional mechanisms in this process. Here we report that two bonafide RNA-binding proteins homologous to the animal translational regulator Musashi, MSIL2 and MSIL4, function redundantly to control SCW formation in Arabidopsis. MSIL2/4 interactomes are similar and enriched in proteins involved in mRNA binding and translational regulation. MSIL2/4 mutations alter SCW formation in the fibers, leading to a reduction in lignin deposition, and an increase of 4-O-glucuronoxylan methylation. In accordance, quantitative proteomics of stems reveal an overaccumulation of glucuronoxylan biosynthetic machinery, including GXM3, in the msil2/4 mutant stem. We showed that MSIL4 immunoprecipitates GXM mRNAs, suggesting a novel aspect of SCW regulation, linking post-transcriptional control to the regulation of SCW biosynthesis genes.
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Affiliation(s)
- Alicia Kairouani
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
| | - Dominique Pontier
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
| | - Claire Picart
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
| | - Fabien Mounet
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, INP, UMR5546Castanet-TolosanFrance
| | - Yves Martinez
- FRAIB-CNRS Plateforme ImagerieCastanet-TolosanFrance
| | - Lucie Le-Bot
- Biopolymères Interactions Assemblages, UR1268 BIA, INRAENantesFrance
| | - Mathieu Fanuel
- Biopolymères Interactions Assemblages, UR1268 BIA, INRAENantesFrance
- PROBE research infrastructure, BIBS Facility, INRAENantesFrance
| | - Philippe Hammann
- Plateforme Protéomique Strasbourg Esplanade de CNRS, Université de StrasbourgStrasbourgFrance
| | - Lucid Belmudes
- Université Grenoble Alpes, INSERM, UA13 BGE, CNRS, CEA, FR2048GrenobleFrance
| | - Remy Merret
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
| | - Jacinthe Azevedo
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
| | - Marie-Christine Carpentier
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
| | - Dominique Gagliardi
- Institut de Biologie Moléculaire des Plantes, IBMP, CNRS, Université de StrasbourgStrasbourgFrance
| | - Yohann Couté
- Université Grenoble Alpes, INSERM, UA13 BGE, CNRS, CEA, FR2048GrenobleFrance
| | - Richard Sibout
- Biopolymères Interactions Assemblages, UR1268 BIA, INRAENantesFrance
| | - Natacha Bies-Etheve
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
| | - Thierry Lagrange
- Laboratoire Génome et Développement des Plantes, Université de Perpignan via Domitia, CNRS, UMR5096PerpignanFrance
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Ma Y, Stafford L, Ratcliffe J, Bacic A, Johnson KL. WAKL8 Regulates Arabidopsis Stem Secondary Wall Development. PLANTS (BASEL, SWITZERLAND) 2022; 11:2297. [PMID: 36079678 PMCID: PMC9460275 DOI: 10.3390/plants11172297] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/24/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Wall-associated kinases/kinase-likes (WAKs/WAKLs) are plant cell surface sensors. A variety of studies have revealed the important functions of WAKs/WAKLs in regulating cell expansion and defense in cells with primary cell walls. Less is known about their roles during the development of the secondary cell walls (SCWs) that are present in xylem vessel (XV) and interfascicular fiber (IF) cells. In this study, we used RNA-seq data to screen Arabidopsis thaliana WAKs/WAKLs members that may be involved in SCW development and identified WAKL8 as a candidate. We obtained T-DNA insertion mutants wakl8-1 (inserted at the promoter region) and wakl8-2 (inserted at the first exon) and compared the phenotypes to wild-type (WT) plants. Decreased WAKL8 transcript levels in stems were found in the wakl8-2 mutant plants, and the phenotypes observed included reduced stem length and thinner walls in XV and IFs compared with those in the WT plants. Cell wall analysis showed no significant changes in the crystalline cellulose or lignin content in mutant stems compared with those in the WT. We found that WAKL8 had alternative spliced versions predicted to have only extracellular regions, which may interfere with the function of the full-length version of WAKL8. Our results suggest WAKL8 can regulate SCW thickening in Arabidopsis stems.
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Affiliation(s)
- Yingxuan Ma
- School of BioSciences, University of Melbourne, Parkville, VIC 3052, Australia
- La Trobe Institute for Agriculture & Food, Department of Animal, Plant and Soil Science, AgriBio Building, La Trobe University, Bundoora, VIC 3086, Australia
| | - Luke Stafford
- La Trobe Institute for Agriculture & Food, Department of Animal, Plant and Soil Science, AgriBio Building, La Trobe University, Bundoora, VIC 3086, Australia
| | - Julian Ratcliffe
- La Trobe Institute for Agriculture & Food, Department of Animal, Plant and Soil Science, AgriBio Building, La Trobe University, Bundoora, VIC 3086, Australia
| | - Antony Bacic
- La Trobe Institute for Agriculture & Food, Department of Animal, Plant and Soil Science, AgriBio Building, La Trobe University, Bundoora, VIC 3086, Australia
- Sino-Australia Plant Cell Wall Research Centre, College of Forestry and Biotechnology, Zhejiang Agriculture and Forestry University, Lin’an, Hangzhou 311300, China
| | - Kim L. Johnson
- La Trobe Institute for Agriculture & Food, Department of Animal, Plant and Soil Science, AgriBio Building, La Trobe University, Bundoora, VIC 3086, Australia
- Sino-Australia Plant Cell Wall Research Centre, College of Forestry and Biotechnology, Zhejiang Agriculture and Forestry University, Lin’an, Hangzhou 311300, China
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5
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Zhang H, Xue X, Guo J, Huang Y, Dai X, Li T, Hu J, Qu Y, Yu L, Mai C, Liu H, Yang L, Zhou Y, Li H. Association of the Recessive Allele vrn-D1 With Winter Frost Tolerance in Bread Wheat. FRONTIERS IN PLANT SCIENCE 2022; 13:879768. [PMID: 35734247 PMCID: PMC9207342 DOI: 10.3389/fpls.2022.879768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Winter frost has been considered the primary limiting factor in wheat production. Shimai 12 is an elite wheat cultivar grown in central and southern Hebei province of China, but sensitive to winter frost. In this study, the winter frost tolerant cultivar Lunxuan 103 was bred by introducing the recessive allele vrn-D1 from winter wheat Shijiazhuang 8 (frost tolerance) into Shimai 12 using marker-assisted selection (MAS). Different from Shimai 12, Lunxuan 103 exhibited a winter growth habit with strong winter frost tolerance. In the Shimai 12 × Shijiazhuang 8 population, the winter progenies (vrn-D1vrn-D1) had significantly lower winter-killed seedling/tiller rates than spring progenies (Vrn-D1aVrn-D1a), and the consistent result was observed in an association population. Winter frost damage caused a significant decrease in grain yield and spike number/m2 in Shimai 12, but not in Lunxuan 103 and Shijiazhuang 8. The time-course expression analysis showed that the transcript accumulation levels of the cold-responsive genes were higher in Lunxuan 103 and Shijiazhuang 8 than in Shimai 12. Lunxuan 103 possessed the same alleles as its parents in the loci for plant height, vernalization, and photoperiod, except for the vernalization gene Vrn-D1. An analysis of genomic composition showed that the two parents contributed similar proportions of genetic compositions to Lunxuan 103. This study provides an example of the improvement of winter frost tolerance by introducing the recessive vernalization gene in bread wheat.
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Affiliation(s)
- Hongjun Zhang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Xinhui Xue
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
- College of Life Sciences, Shanxi University, Taiyuan, China
| | - Jie Guo
- College of Agriculture, Shanxi Agricultural University, Jinzhong, China
| | - Yiwen Huang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Xuran Dai
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
- College of Agronomy and Biotechnology, Hebei Normal University of Science and Technology, Qinhuangdao, China
| | - Teng Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Jinghuang Hu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Yunfeng Qu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Liqiang Yu
- Zhaoxian Experiment Station, Shijiazhuang Academy of Agricultural and Forestry Sciences, Shijiazhuang, China
| | - Chunyan Mai
- Xinxiang Innovation Center for Breeding Technology of Dwarf-Male-Sterile Wheat, Xinxiang, China
| | - Hongwei Liu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Li Yang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Yang Zhou
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
| | - Hongjie Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, National Engineering Research Center of Crop Molecular Breeding, Beijing, China
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6
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Yang K, Li L, Lou Y, Zhu C, Li X, Gao Z. A regulatory network driving shoot lignification in rapidly growing bamboo. PLANT PHYSIOLOGY 2021; 187:900-916. [PMID: 34608957 PMCID: PMC8491019 DOI: 10.1093/plphys/kiab289] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 05/31/2021] [Indexed: 05/24/2023]
Abstract
Woody bamboo is environmentally friendly, abundant, and an alternative to conventional timber. Degree of lignification and lignin content and deposition affect timber properties. However, the lignification regulatory network in monocots is poorly understood. To elucidate the regulatory mechanism of lignification in moso bamboo (Phyllostachys edulis), we conducted integrated analyses using transcriptome, small RNA, and degradome sequencing followed by experimental verification. The lignification degree and lignin content increased with increased bamboo shoot height, whereas phenylalanine ammonia-lyase and Laccase activities first increased and then decreased with shoot growth. Moreover, we identified 11,504 differentially expressed genes (DEGs) in different portions of the 13th internodes of different height shoots; most DEGs associated with cell wall and lignin biosynthesis were upregulated, whereas some DEGs related to cell growth were downregulated. We identified a total of 1,502 miRNAs, of which 687 were differentially expressed. Additionally, in silico and degradome analyses indicated that 5,756 genes were targeted by 691 miRNAs. We constructed a regulatory network of lignification, including 11 miRNAs, 22 transcription factors, and 36 enzyme genes, in moso bamboo. Furthermore, PeLAC20 overexpression increased lignin content in transgenic Arabidopsis (Arabidopsis thaliana) plants. Finally, we proposed a reliable miRNA-mediated "MYB-PeLAC20" module for lignin monomer polymerization. Our findings provide definite insights into the genetic regulation of bamboo lignification. In addition to providing a platform for understanding related mechanisms in other monocots, these insights could be used to develop strategies to improve bamboo timber properties.
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Affiliation(s)
- Kebin Yang
- Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology, Institute of Gene Science and Industrialization for Bamboo and Rattan Resources, International Center for Bamboo and Rattan, Beijing 100102, China
| | - Lichao Li
- Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology, Institute of Gene Science and Industrialization for Bamboo and Rattan Resources, International Center for Bamboo and Rattan, Beijing 100102, China
| | - Yongfeng Lou
- Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology, Institute of Gene Science and Industrialization for Bamboo and Rattan Resources, International Center for Bamboo and Rattan, Beijing 100102, China
- Jiangxi Academy of Forestry, Jiangxi Provincial Key Laboratory of Plant Biotechnology, Nanchang 330013, China
| | - Chenglei Zhu
- Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology, Institute of Gene Science and Industrialization for Bamboo and Rattan Resources, International Center for Bamboo and Rattan, Beijing 100102, China
| | - Xueping Li
- Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology, Institute of Gene Science and Industrialization for Bamboo and Rattan Resources, International Center for Bamboo and Rattan, Beijing 100102, China
| | - Zhimin Gao
- Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo and Rattan Science and Technology, Institute of Gene Science and Industrialization for Bamboo and Rattan Resources, International Center for Bamboo and Rattan, Beijing 100102, China
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Hao S, Lu Y, Peng Z, Wang E, Chao L, Zhong S, Yao Y. McMYB4 improves temperature adaptation by regulating phenylpropanoid metabolism and hormone signaling in apple. HORTICULTURE RESEARCH 2021; 8:182. [PMID: 34333543 PMCID: PMC8325679 DOI: 10.1038/s41438-021-00620-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 05/06/2021] [Accepted: 05/20/2021] [Indexed: 05/15/2023]
Abstract
Temperature changes affect apple development and production. Phenylpropanoid metabolism and hormone signaling play a crucial role in regulating apple growth and development in response to temperature changes. Here, we found that McMYB4 is induced by treatment at 28 °C and 18 °C, and McMYB4 overexpression results in flavonol and lignin accumulation in apple leaves. Yeast one-hybrid (Y1H) assays and electrophoretic mobility shift assays (EMSAs) further revealed that McMYB4 targets the promoters of the flavonol biosynthesis genes CHS and FLS and the lignin biosynthesis genes CAD and F5H. McMYB4 expression resulted in higher levels of flavonol and lignin biosynthesis in apple during growth at 28 °C and 18 °C than during growth at 23 °C. At 28 °C and 18 °C, McMYB4 also binds to the AUX/ARF and BRI/BIN promoters to activate gene expression, resulting in acceleration of the auxin and brassinolide signaling pathways. Taken together, our results demonstrate that McMYB4 promotes flavonol biosynthesis and brassinolide signaling, which decreases ROS contents to improve plant resistance and promotes lignin biosynthesis and auxin signaling to regulate plant growth. This study suggests that McMYB4 participates in the abiotic resistance and growth of apple in response to temperature changes by regulating phenylpropanoid metabolism and hormone signaling.
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Affiliation(s)
- Suxiao Hao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China
- Beijing Bei Nong Enterprise Management Co. Ltd, Beijing, 102206, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
- Beijing Key Laboratory for Agricultural Application and New Technique, Beijing University of Agriculture, Beijing, 102206, China
- College of Forestry, Beijing Forestry University, Beijing, 100083, China
| | - Yanfen Lu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
- Beijing Key Laboratory for Agricultural Application and New Technique, Beijing University of Agriculture, Beijing, 102206, China
| | - Zhen Peng
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
- Beijing Key Laboratory for Agricultural Application and New Technique, Beijing University of Agriculture, Beijing, 102206, China
| | - Enying Wang
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
- Beijing Key Laboratory for Agricultural Application and New Technique, Beijing University of Agriculture, Beijing, 102206, China
| | - Linke Chao
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
- Beijing Key Laboratory for Agricultural Application and New Technique, Beijing University of Agriculture, Beijing, 102206, China
| | - Silin Zhong
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China.
- College of Life Science, The Chinese University of Hong Kong, Hong Kong, China.
| | - Yuncong Yao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing University of Agriculture, Beijing, 102206, China.
- Plant Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China.
- Beijing Key Laboratory for Agricultural Application and New Technique, Beijing University of Agriculture, Beijing, 102206, China.
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8
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Coleman HD, Brunner AM, Tsai CJ. Synergies and Entanglement in Secondary Cell Wall Development and Abiotic Stress Response in Trees. FRONTIERS IN PLANT SCIENCE 2021; 12:639769. [PMID: 33815447 PMCID: PMC8018706 DOI: 10.3389/fpls.2021.639769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
A major challenge for sustainable food, fuel, and fiber production is simultaneous genetic improvement of yield, biomass quality, and resilience to episodic environmental stress and climate change. For Populus and other forest trees, quality traits involve alterations in the secondary cell wall (SCW) of wood for traditional uses, as well as for a growing diversity of biofuels and bioproducts. Alterations in wood properties that are desirable for specific end uses can have negative effects on growth and stress tolerance. Understanding of the diverse roles of SCW genes is necessary for the genetic improvement of fast-growing, short-rotation trees that face perennial challenges in their growth and development. Here, we review recent progress into the synergies and antagonisms of SCW development and abiotic stress responses, particularly, the roles of transcription factors, SCW biogenesis genes, and paralog evolution.
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Affiliation(s)
| | - Amy M. Brunner
- Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA, United States
| | - Chung-Jui Tsai
- Department of Plant Biology, University of Georgia, Athens, GA, United States
- Department of Genetics, University of Georgia, Athens, GA, United States
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States
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9
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Oberschelp GPJ, Guarnaschelli AB, Teson N, Harrand L, Podestá FE, Margarit E. Cold acclimation and freezing tolerance in three Eucalyptus species: A metabolomic and proteomic approach. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 154:316-327. [PMID: 32593088 DOI: 10.1016/j.plaphy.2020.05.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 05/21/2020] [Accepted: 05/21/2020] [Indexed: 05/20/2023]
Abstract
The ability of plants to cope with frost events relies on the physiological and molecular responses triggered by cold temperatures. This process, named acclimation, involves reprogramming gene expression in order to adjust metabolism. Planted Eucalyptus species are highly productive but most of them are frost sensitive. However, acclimation process varies among species and environmental conditions, promoting more or less frost damage in young plantations of frost-prone areas. To identify metabolites and proteins responsible for these differences, two acclimation regimes were imposed to seedling of Eucalyptus grandis Hill ex Maiden (Eg), Eucalyptus dunnii Maiden (Ed) and Eucalyptus benthamii Maiden Cambage (Eb), and leaves submitted to biochemical and molecular analyses. Further, seedlings were used for simulated frosts in order to test the acclimation status effect on frost tolerance. Eb showed higher frost tolerance than Ed and Eg under control and acclimation scenarios, possibly due to its higher accumulation of phenolics, anthocyanins and soluble sugars as well as lower levels of photosynthetic pigments and related proteins. Also, a rise in frost tolerance and in osmoprotectants and antioxidants was observed for all the species due to cold acclimation treatment. Interestingly, metabolic profiles differed among species, suggesting different mechanisms to endure frosts and, probably, different requirements for cold acclimation. Shotgun proteomics reinforced differences and commonalities and supported metabolome observations. An in depth understanding of these responses could help to safeguard planted forests productivity through breeding of tolerant genetic material.
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Affiliation(s)
| | - Ana Beatriz Guarnaschelli
- Facultad de Agronomía de la Universidad de Buenos Aires (FAUBA), Av. San Martín 4453, CABA, Argentina
| | - Natalia Teson
- EEA Concordia del INTA, Ruta 22 y vías del ferrocarril, Colonia Yeruá, Entre Ríos, Argentina
| | - Leonel Harrand
- EEA Concordia del INTA, Ruta 22 y vías del ferrocarril, Colonia Yeruá, Entre Ríos, Argentina
| | - Florencio Esteban Podestá
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Suipacha 531, Rosario, Santa Fe. Argentina
| | - Ezequiel Margarit
- Centro de Estudios Fotosintéticos y Bioquímicos (CEFOBI), Suipacha 531, Rosario, Santa Fe. Argentina.
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10
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Zhang J, Yin XR, Li H, Xu M, Zhang MX, Li SJ, Liu XF, Shi YN, Grierson D, Chen KS. ETHYLENE RESPONSE FACTOR39-MYB8 complex regulates low-temperature-induced lignification of loquat fruit. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3172-3184. [PMID: 32072171 PMCID: PMC7475177 DOI: 10.1093/jxb/eraa085] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 02/15/2020] [Indexed: 05/07/2023]
Abstract
Flesh lignification is a specific chilling response that causes deterioration in the quality of stored red-fleshed loquat fruit (Eribotrya japonica) and is one aspect of wider chilling injury. APETALA2/ETHLENE RESPONSIVE FACTOR (AP2/ERF) transcription factors are important regulators of plant low-temperature responses and lignin biosynthesis. In this study, the expression and action of 27 AP2/ERF genes from the red-fleshed loquat cultivar 'Luoyangqing' were investigated in order to identify transcription factors regulating low-temperature-induced lignification. EjERF27, EjERF30, EjERF36, and EjERF39 were significantly induced by storage at 0 °C but inhibited by a low-temperature conditioning treatment (pre-storage at 5 °C for 6 days before storage at 0 °C, which reduces low-temperature-induced lignification), and their transcript levels positively correlated with flesh lignification. A dual-luciferase assay indicated that EjERF39 could transactivate the promoter of the lignin biosynthetic gene Ej4CL1, and an electrophoretic mobility shift assay confirmed that EjERF39 recognizes the DRE element in the promoter region of Ej4CL1. Furthermore, the combination of EjERF39 and the previously characterized EjMYB8 synergistically transactivated the Ej4CL1 promoter, and both transcription factors showed expression patterns correlated with lignification in postharvest treatments and red-fleshed 'Luoyangqing' and white-fleshed 'Ninghaibai' cultivars with different lignification responses. Bimolecular fluorescence complementation and luciferase complementation imaging assays confirmed direct protein-protein interaction between EjERF39 and EjMYB8. These data indicate that EjERF39 is a novel cold-responsive transcriptional activator of Ej4CL1 that forms a synergistic activator complex with EjMYB8 and contributes to loquat fruit lignification at low temperatures.
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Affiliation(s)
- Jing Zhang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou, China
- School of Horticulture and Plant Protection, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou, China
| | - Xue-ren Yin
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou, China
| | - Heng Li
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
| | - Meng Xu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
| | - Meng-xue Zhang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
| | - Shao-jia Li
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou, China
| | - Xiao-fen Liu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou, China
| | - Yan-na Shi
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou, China
| | - Donald Grierson
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
- Plant & Crop Sciences Division, School of Biosciences, University of Nottingham, Loughborough, UK
| | - Kun-song Chen
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou, China
- Correspondence:
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11
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Cao PB, Ployet R, Nguyen C, Dupas A, Ladouce N, Martinez Y, Grima-Pettenati J, Marque C, Mounet F, Teulières C. Wood Architecture and Composition Are Deeply Remodeled in Frost Sensitive Eucalyptus Overexpressing CBF/DREB1 Transcription Factors. Int J Mol Sci 2020; 21:ijms21083019. [PMID: 32344718 PMCID: PMC7215815 DOI: 10.3390/ijms21083019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 02/03/2023] Open
Abstract
Eucalypts are the most planted trees worldwide, but most of them are frost sensitive. Overexpressing transcription factors for CRT-repeat binding factors (CBFs) in transgenic Eucalyptus confer cold resistance both in leaves and stems. While wood plays crucial roles in trees and is affected by environmental cues, its potential role in adaptation to cold stress has been neglected. Here, we addressed this question by investigating the changes occurring in wood in response to the overexpression of two CBFs, taking advantage of available transgenic Eucalyptus lines. We performed histological, biochemical, and transcriptomic analyses on xylem samples. CBF ectopic expression led to a reduction of both primary and secondary growth, and triggered changes in xylem architecture with smaller and more frequent vessels and fibers exhibiting reduced lumens. In addition, lignin content and syringyl/guaiacyl (S/G) ratio increased. Consistently, many genes of the phenylpropanoid and lignin branch pathway were upregulated. Most of the features of xylem remodeling induced by CBF overexpression are reminiscent of those observed after long exposure of Eucalyptus trees to chilling temperatures. Altogether, these results suggest that CBF plays a central role in the cross-talk between response to cold and wood formation and that the remodeling of wood is part of the adaptive strategies to face cold stress.
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Affiliation(s)
- Phi Bang Cao
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
- Department of Natural Sciences, Hung Vuong University, Nong Trang Ward, Viet Tri City, Phu Tho Province 29000, Vietnam
| | - Raphaël Ployet
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa
| | - Chien Nguyen
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
- Biotechnology and crop protection Department; Northern Mountainous Agriculture and Forestry Science Institute, Phu Tho 29000, Vietnam
| | - Annabelle Dupas
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
| | - Nathalie Ladouce
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
| | - Yves Martinez
- CMEAB, IFR40 Pôle de Biotechnologie Végétale, 31320 Castanet-Tolosan, France
| | - Jacqueline Grima-Pettenati
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
| | - Christiane Marque
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
| | - Fabien Mounet
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
| | - Chantal Teulières
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, UMR 5546, 31320 Castanet-Tolosan, France; (P.B.C.); (R.P.)
- Correspondence:
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12
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Behr M, Guerriero G, Grima-Pettenati J, Baucher M. A Molecular Blueprint of Lignin Repression. TRENDS IN PLANT SCIENCE 2019; 24:1052-1064. [PMID: 31371222 DOI: 10.1016/j.tplants.2019.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 06/10/2023]
Abstract
Although lignin is essential to ensure the correct growth and development of land plants, it may be an obstacle to the production of lignocellulosics-based biofuels, and reduces the nutritional quality of crops used for human consumption or livestock feed. The need to tailor the lignocellulosic biomass for more efficient biofuel production or for improved plant digestibility has fostered considerable advances in our understanding of the lignin biosynthetic pathway and its regulation. Most of the described regulators are transcriptional activators of lignin biosynthesis, but considerably less attention has been devoted to the repressors of this pathway. We provide a comprehensive overview of the molecular factors that negatively impact on the lignification process at both the transcriptional and post-transcriptional levels.
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Affiliation(s)
- Marc Behr
- Laboratoire de Biotechnologie Végétale, Université libre de Bruxelles, 6041 Gosselies, Belgium
| | - Gea Guerriero
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 4422 Belvaux, Luxembourg
| | - Jacqueline Grima-Pettenati
- Laboratoire de Recherche en Sciences Végétales, Centre National de la Recherche Scientifique (CNRS) Université Paul Sabatier Toulouse III (UPS), 31326 Castanet-Tolosan, France
| | - Marie Baucher
- Laboratoire de Biotechnologie Végétale, Université libre de Bruxelles, 6041 Gosselies, Belgium.
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13
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Lu Y, Deng S, Li Z, Wu J, Liu Q, Liu W, Yu WJ, Zhang Y, Shi W, Zhou J, Li H, Polle A, Luo ZB. Competing Endogenous RNA Networks Underlying Anatomical and Physiological Characteristics of Poplar Wood in Acclimation to Low Nitrogen Availability. PLANT & CELL PHYSIOLOGY 2019; 60:2478-2495. [PMID: 31368491 DOI: 10.1093/pcp/pcz146] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 07/10/2019] [Indexed: 05/27/2023]
Abstract
Although poplar plantations are often established on nitrogen (N)-poor soil, the physiological and molecular mechanisms underlying wood properties of poplars in acclimation to low N availability remain largely unknown. To investigate wood properties of poplars in acclimation to low N, Populus � canescens saplings were exposed to either 50 (low N) or 500 (normal N) �M NH4NO3 for 2 months. Low N resulted in decreased xylem width and cell layers of the xylem (the number of cells counted along the ray parenchyma on the stem cross section), narrower lumina of vessels and fibers, greater thickness of double fiber walls (the walls between two adjacent fiber cells), more hemicellulose and lignin deposition, and reduced cellulose accumulation in poplar wood. Consistently, concentrations of gibberellins involved in cell size determination and the abundance of various metabolites including amino acids, carbohydrates and precursors for cell wall biosynthesis were decreased in low N-supplied wood. In line with these anatomical and physiological changes, a number of mRNAs, long noncoding RNAs (lncRNAs) and microRNAs (miRNAs) were significantly differentially expressed. Competing endogenous RNA regulatory networks were identified in the wood of low N-treated poplars. Overall, these results indicate that miRNAs-lncRNAs-mRNAs networks are involved in regulating wood properties and physiological processes of poplars in acclimation to low N availability.
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Affiliation(s)
- Yan Lu
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Shurong Deng
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Zhuorong Li
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Jiangting Wu
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Qifeng Liu
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Wenzhe Liu
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Wen-Jian Yu
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Yuhong Zhang
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Wenguang Shi
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Jing Zhou
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
| | - Hong Li
- Postgraduate School, Chinese Academy of Forestry, Beijing, P. R. China
| | - Andrea Polle
- Forest Botany and Tree Physiology, University of Goettingen, B�sgenweg 2, G�ttingen, Germany
| | - Zhi-Bin Luo
- State key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, P. R. China
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14
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McCahill IW, Hazen SP. Regulation of Cell Wall Thickening by a Medley of Mechanisms. TRENDS IN PLANT SCIENCE 2019; 24:853-866. [PMID: 31255545 DOI: 10.1016/j.tplants.2019.05.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/28/2019] [Accepted: 05/31/2019] [Indexed: 05/08/2023]
Abstract
To provide physical support for developing structures and to withstand the pressures associated with water and nutrient transport, some cells deposit a secondary cell wall, a rigid matrix of polysaccharide and phenolic biopolymers. The biosynthesis and deposition of these materials and the patterning of secondary wall-forming cells is controlled by a network of transcription factors. However, recent work suggests that this network forms the core of a more complex, multilevel regulatory system. This expanded system includes epigenetic, post-transcriptional, and post-translational regulation, and is coordinated with other pathways controlling primary growth and responses to environmental stimuli. New findings expand the set of transcription factors identified as secondary cell wall regulators and reveal novel regulatory processes that further govern secondary wall biogenesis.
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Affiliation(s)
- Ian W McCahill
- Biology Department, University of Massachusetts, Amherst, MA 01003, USA; Plant Biology Graduate Program, University of Massachusetts, Amherst, MA 01003, USA
| | - Samuel P Hazen
- Biology Department, University of Massachusetts, Amherst, MA 01003, USA.
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15
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Ployet R, Veneziano Labate MT, Regiani Cataldi T, Christina M, Morel M, San Clemente H, Denis M, Favreau B, Tomazello Filho M, Laclau JP, Labate CA, Chaix G, Grima-Pettenati J, Mounet F. A systems biology view of wood formation in Eucalyptus grandis trees submitted to different potassium and water regimes. THE NEW PHYTOLOGIST 2019; 223:766-782. [PMID: 30887522 DOI: 10.1111/nph.15802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Accepted: 02/28/2019] [Indexed: 05/02/2023]
Abstract
Wood production in fast-growing Eucalyptus grandis trees is highly dependent on both potassium (K) fertilization and water availability but the molecular processes underlying wood formation in response to the combined effects of these two limiting factors remain unknown. E. grandis trees were submitted to four combinations of K-fertilization and water supply. Weighted gene co-expression network analysis and MixOmics-based co-regulation networks were used to integrate xylem transcriptome, metabolome and complex wood traits. Functional characterization of a candidate gene was performed in transgenic E. grandis hairy roots. This integrated network-based approach enabled us to identify meaningful biological processes and regulators impacted by K-fertilization and/or water limitation. It revealed that modules of co-regulated genes and metabolites strongly correlated to wood complex traits are in the heart of a complex trade-off between biomass production and stress responses. Nested in these modules, potential new cell-wall regulators were identified, as further confirmed by the functional characterization of EgMYB137. These findings provide new insights into the regulatory mechanisms of wood formation under stressful conditions, pointing out both known and new regulators co-opted by K-fertilization and/or water limitation that may potentially promote adaptive wood traits.
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Affiliation(s)
- Raphael Ployet
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, 31326, Castanet-Tolosan, France
| | - Mônica T Veneziano Labate
- Max Feffer Laboratory for Plant Genetics, Department of Genetics, College of Agriculture 'Luiz de Queiroz', University of São Paulo, Av. Pádua Dias 11, PO Box 09, Piracicaba-SP, 13418-900, Brazil
| | - Thais Regiani Cataldi
- Max Feffer Laboratory for Plant Genetics, Department of Genetics, College of Agriculture 'Luiz de Queiroz', University of São Paulo, Av. Pádua Dias 11, PO Box 09, Piracicaba-SP, 13418-900, Brazil
| | - Mathias Christina
- CIRAD, UMR ECO&SOLS, F-34398, Montpellier, France
- Department of Forest Resource, Luiz de Queiroz College of Agriculture, University of São Paulo, Av. Pádua Dias N° 11, Piracicaba, São Paulo, 13418-900, Brazil
| | - Marie Morel
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, 31326, Castanet-Tolosan, France
| | - Hélène San Clemente
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, 31326, Castanet-Tolosan, France
| | - Marie Denis
- CIRAD, UMR AGAP, 34395, Montpellier, Cedex 9, France
- UMR AGAP, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - Bénédicte Favreau
- CIRAD, UMR AGAP, 34395, Montpellier, Cedex 9, France
- UMR AGAP, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - Mario Tomazello Filho
- Department of Forest Resource, Luiz de Queiroz College of Agriculture, University of São Paulo, Av. Pádua Dias N° 11, Piracicaba, São Paulo, 13418-900, Brazil
| | - Jean-Paul Laclau
- CIRAD, UMR ECO&SOLS, F-34398, Montpellier, France
- Department of Forest Resource, Luiz de Queiroz College of Agriculture, University of São Paulo, Av. Pádua Dias N° 11, Piracicaba, São Paulo, 13418-900, Brazil
| | - Carlos Alberto Labate
- Max Feffer Laboratory for Plant Genetics, Department of Genetics, College of Agriculture 'Luiz de Queiroz', University of São Paulo, Av. Pádua Dias 11, PO Box 09, Piracicaba-SP, 13418-900, Brazil
| | - Gilles Chaix
- Department of Forest Resource, Luiz de Queiroz College of Agriculture, University of São Paulo, Av. Pádua Dias N° 11, Piracicaba, São Paulo, 13418-900, Brazil
- CIRAD, UMR AGAP, 34395, Montpellier, Cedex 9, France
- UMR AGAP, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - Jacqueline Grima-Pettenati
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, 31326, Castanet-Tolosan, France
| | - Fabien Mounet
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse III, CNRS, UPS, 31326, Castanet-Tolosan, France
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16
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Parrotta L, Faleri C, Guerriero G, Cai G. Cold stress affects cell wall deposition and growth pattern in tobacco pollen tubes. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 283:329-342. [PMID: 31128704 DOI: 10.1016/j.plantsci.2019.03.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 01/29/2019] [Accepted: 03/15/2019] [Indexed: 05/08/2023]
Abstract
Cold is an abiotic stress seriously threatening crop productivity by decreasing biomass production. The pollen tube is a target of cold stress, but also a useful model to address questions on cell wall biosynthesis. We here provide (immuno)cytological data relative to the impact of cold on the pollen tube cell wall. We clearly show that the growth pattern is severely affected by the stress, since the typical pulsed-growth mechanism accompanied by the periodic deposition of pectin rings is absent/severely reduced. Additionally, pectins and cellulose accumulate in bulges provoked by the stress, while callose, which colocalizes with pectins in the periodic rings formed during pulsed growth, accumulates randomly in the stressed samples. The altered distribution of the cell wall components is accompanied by differences in the localization of glucan synthases: cellulose synthase shows a more diffuse localization, while callose synthase shows a more frequent cytoplasmic accumulation, thereby denoting a failure in plasma membrane insertion. The cell wall observations are complemented by the analysis of intracellular Ca2+, pH and reactive oxygen species (ROS): while in the case of pH no major differences are observed, a less focused Ca2+ and ROS gradients are present in the stressed samples. The standard oscillatory growth of pollen tubes is recovered by transient changes of turgor pressure induced by hypoosmotic media. Overall our data contribute to the understanding of the impact that cold stress has on the normal development of the pollen tube and unveil the cell wall-related aberrant features accompanying the observed alterations.
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Affiliation(s)
- Luigi Parrotta
- Università di Bologna, Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Via Irnerio 42, Bologna, Italy
| | - Claudia Faleri
- Università di Siena, Dipartimento di Scienze della Vita, via P.A. Mattioli 4, Siena, Italy
| | - Gea Guerriero
- Research and Innovation Department, Luxembourg Institute of Science and Technology, 5 avenue des Hauts-Fourneaux, L-4362, Esch/Alzette, Luxembourg
| | - Giampiero Cai
- Università di Siena, Dipartimento di Scienze della Vita, via P.A. Mattioli 4, Siena, Italy.
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17
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Tsai CJ, Harding SA, Cooke JEK. Branching out: a new era of investigating physiological processes in forest trees using genomic tools. TREE PHYSIOLOGY 2018; 38:303-310. [PMID: 29506180 DOI: 10.1093/treephys/tpy026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Accepted: 02/14/2018] [Indexed: 06/08/2023]
Affiliation(s)
- Chung-Jui Tsai
- Warnell School of Forestry and Natural Resources, Department of Genetics and Department of Plant Biology, University of Georgia, Athens, GA 30602, USA
| | - Scott A Harding
- Warnell School of Forestry and Natural Resources, Department of Genetics and Department of Plant Biology, University of Georgia, Athens, GA 30602, USA
| | - Janice E K Cooke
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada T6G 2E9
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