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Zheng L, Nagpal P, Villarino G, Trinidad B, Bird L, Huang Y, Reed JW. miR167 limits anther growth to potentiate anther dehiscence. Development 2019; 146:dev.174375. [PMID: 31262724 DOI: 10.1242/dev.174375] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 06/21/2019] [Indexed: 01/28/2023]
Abstract
In flowering plants, anther dehiscence and pollen release are essential for sexual reproduction. Anthers dehisce after cell wall degradation weakens stomium cell junctions in each anther locule, and desiccation creates mechanical forces that open the locules. Either effect or both together may break stomium cell junctions. The microRNA miR167 negatively regulates ARF6 and ARF8, which encode auxin response transcription factors. Arabidopsis mARF6 or mARF8 plants with mutated miR167 target sites have defective anther dehiscence and ovule development. Null mir167a mutations recapitulated mARF6 and mARF8 anther and ovule phenotypes, indicating that MIR167a is the main miR167 precursor gene that delimits ARF6 and ARF8 expression in these organs. Anthers of mir167a or mARF6/8 plants overexpressed genes encoding cell wall loosening functions associated with cell expansion, and grew larger than wild-type anthers did starting at flower stage 11. Experimental desiccation enabled dehiscence of miR167-deficient anthers, indicating competence to dehisce. Conversely, high humidity conditions delayed anther dehiscence in wild-type flowers. These results support a model in which miR167-mediated anther growth arrest permits anther dehiscence. Without miR167 regulation, excess anther growth delays dehiscence by prolonging desiccation.
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Affiliation(s)
- Lanjie Zheng
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA.,College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Punita Nagpal
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA
| | - Gonzalo Villarino
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA
| | - Brendan Trinidad
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA
| | - Laurina Bird
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA
| | - Yubi Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Jason W Reed
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA .,Laboratoire de Reproduction et Developpement des Plantes, Ecole Normale Superieure de Lyon, 69342 Lyon, France
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Pan R, Liu J, Hu J. Peroxisomes in plant reproduction and seed-related development. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2019; 61:784-802. [PMID: 30578613 DOI: 10.1111/jipb.12765] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 12/18/2018] [Indexed: 05/21/2023]
Abstract
Peroxisomes are small multi-functional organelles essential for plant development and growth. Plant peroxisomes play various physiological roles, including phytohormone biosynthesis, lipid catabolism, reactive oxygen species metabolism and many others. Mutant analysis demonstrated key roles for peroxisomes in plant reproduction, seed development and germination and post-germinative seedling establishment; however, the underlying mechanisms remain to be fully elucidated. This review summarizes findings that reveal the importance and complexity of the role of peroxisomes in the pertinent processes. The β-oxidation pathway plays a central role, whereas other peroxisomal pathways are also involved. Understanding the biochemical and molecular mechanisms of these peroxisomal functions will be instrumental to the improvement of crop plants.
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Affiliation(s)
- Ronghui Pan
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jun Liu
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jianping Hu
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, USA
- Plant Biology Department, Michigan State University, East Lansing, MI, USA
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Ju L, Jing Y, Shi P, Liu J, Chen J, Yan J, Chu J, Chen KM, Sun J. JAZ proteins modulate seed germination through interaction with ABI5 in bread wheat and Arabidopsis. THE NEW PHYTOLOGIST 2019; 223:246-260. [PMID: 30802963 DOI: 10.1111/nph.15757] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 02/18/2019] [Indexed: 05/21/2023]
Abstract
Appropriate regulation of crop seed germination is of significance for agriculture production. In this study, we show that TaJAZ1, most closely related to Arabidopsis JAZ3, negatively modulates abscisic acid (ABA)-inhibited seed germination and ABA-responsive gene expression in bread wheat. Biochemical interaction assays demonstrate that the C-terminal part containing the Jas domain of TaJAZ1 physically interacts with TaABI5. Similarly, Arabidopsis jasmonate-ZIM domain (JAZ) proteins also negatively modulate ABA responses. Further we find that a subset of JAZ proteins could interact with ABI5 using the luciferase complementation imaging assays. Choosing JAZ3 as a representative, we demonstrate that JAZ3 interacts with ABI5 in vivo and represses the transcriptional activation activity of ABI5. ABA application could abolish the enrichment of JAZ proteins in the ABA-responsive gene promoter. Furthermore, we find that ABA application could induce the expression of jasmonate (JA) biosynthetic genes and then increase the JA concentrations partially dependent on the function of ABI5, consequently leading to the degradation of JAZ proteins. This study sheds new light on the crosstalk between JA and ABA in modulating seed germination in bread wheat and Arabidopsis.
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Affiliation(s)
- Lan Ju
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yexing Jing
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Pengtao Shi
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jie Liu
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jiansheng Chen
- State Key Laboratory of Crop Biology/Group of Quality Wheat Breeding in Agronomy, Shandong Agricultural University, Taian, 271018, Shandong, China
| | - Jijun Yan
- National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Jinfang Chu
- National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Kun-Ming Chen
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jiaqiang Sun
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
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JASSY, a chloroplast outer membrane protein required for jasmonate biosynthesis. Proc Natl Acad Sci U S A 2019; 116:10568-10575. [PMID: 31068459 DOI: 10.1073/pnas.1900482116] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Jasmonates are vital plant hormones that not only act in the stress response to biotic and abiotic influences, such as wounding, pathogen attack, and cold acclimation, but also drive developmental processes in cooperation with other plant hormones. The biogenesis of jasmonates starts in the chloroplast, where several enzymatic steps produce the jasmonate precursor 12-oxophytodienoic acid (OPDA) from α-linolenic acid. OPDA in turn is exported into the cytosol for further conversion into active jasmonates, which subsequently induces the expression of multiple genes in the nucleus. Despite its obvious importance, the export of OPDA across the chloroplast membranes has remained elusive. In this study, we characterized a protein residing in the chloroplast outer membrane, JASSY, which has proven indispensable for the export of OPDA from the chloroplast. We provide evidence that JASSY has channel-like properties and propose that it thereby facilitates OPDA transport. Consequently, a lack of JASSY in Arabidopsis leads to a deficiency in accumulation of jasmonic acids, which results in impaired expression of jasmonate target genes on exposure to various stresses. This results in plants that are more susceptible to pathogen attack and also exhibit defects in cold acclimation.
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PACLOBUTRAZOL-RESISTANCE Gene Family Regulates Floral Organ Growth with Unequal Genetic Redundancy in Arabidopsis thaliana. Int J Mol Sci 2019; 20:ijms20040869. [PMID: 30781591 PMCID: PMC6412927 DOI: 10.3390/ijms20040869] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 01/23/2019] [Accepted: 02/13/2019] [Indexed: 01/13/2023] Open
Abstract
A PACLOBUTRAZOL-RESISTANCE (PRE) gene family, consisting of six genes in Arabidopsis thaliana, encodes a group of helix-loop-helix proteins that act in the growth-promoting transcriptional network. To delineate the specific role of each of the PRE genes in organ growth, we took a reverse genetic approach by constructing high order pre loss-of-function mutants of Arabidopsis thaliana. In addition to dwarf vegetative growth, some double or high order pre mutants exhibited defective floral development, resulting in reduced fertility. While pre2pre5 is normally fertile, both pre2pre6 and pre5pre6 showed reduced fertility. Further, the reduced fertility was exacerbated in the pre2pre5pre6 mutant, indicative of the redundant and critical roles of these PREs. Self-pollination assay and scanning electron microscopy analysis showed that the sterility of pre2pre5pre6 was mainly ascribed to the reduced cell elongation of anther filament, limiting access of pollens to stigma. We found that the expression of a subset of flower-development related genes including ARGOS, IAA19, ACS8, and MYB24 was downregulated in the pre2pre5pre6 flowers. Given these results, we propose that PREs, with unequal functional redundancy, take part in the coordinated growth of floral organs, contributing to successful autogamous reproduction in Arabidopsis thaliana.
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Heterologous Expression of the Grapevine JAZ7 Gene in Arabidopsis Confers Enhanced Resistance to Powdery Mildew but Not to Botrytis cinerea. Int J Mol Sci 2018; 19:ijms19123889. [PMID: 30563086 PMCID: PMC6321488 DOI: 10.3390/ijms19123889] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 11/25/2018] [Accepted: 11/30/2018] [Indexed: 12/17/2022] Open
Abstract
Jasmonate ZIM-domain (JAZ) family proteins comprise a class of transcriptional repressors that silence jasmonate-inducible genes. Although a considerable amount of research has been carried out on this gene family, there is still very little information available on the role of specific JAZ gene members in multiple pathogen resistance, especially in non-model species. In this study, we investigated the potential resistance function of the VqJAZ7 gene from a disease-resistant wild grapevine, Vitis quinquangularis cv. “Shang-24”, through heterologous expression in Arabidopsis thaliana. VqJAZ7-expressing transgenic Arabidopsis were challenged with three pathogens: the biotrophic fungus Golovinomyces cichoracearum, necrotrophic fungus Botrytis cinerea, and semi-biotrophic bacteria Pseudomonas syringae pv. tomato DC3000. We found that plants expressing VqJAZ7 showed greatly reduced disease symptoms for G. cichoracearum, but not for B. cinerea or P. syringae. In response to G cichoracearum infection, VqJAZ7-expressing transgenic lines exhibited markedly higher levels of cell death, superoxide anions (O2¯, and H2O2 accumulation, relative to nontransgenic control plants. Moreover, we also tested the relative expression of defense-related genes to comprehend the possible induced pathways. Taken together, our results suggest that VqJAZ7 in grapevine participates in molecular pathways of resistance to G. cichoracearum, but not to B. cinerea or P. syringae.
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57
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Fan S, Zhang D, Gao C, Wan S, Lei C, Wang J, Zuo X, Dong F, Li Y, Shah K, Han M. Mediation of Flower Induction by Gibberellin and its Inhibitor Paclobutrazol: mRNA and miRNA Integration Comprises Complex Regulatory Cross-Talk in Apple. PLANT & CELL PHYSIOLOGY 2018; 59:2288-2307. [PMID: 30137602 DOI: 10.1093/pcp/pcy154] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 07/27/2018] [Indexed: 05/14/2023]
Abstract
Guaranteeing successful flowering is very important in economic plant species, especially apple (Malus domestica Borkh.), which is difficult to induce to flower. However, the gene expression and networks involved in flowering have not been totally characterized. Here, we employed mRNA and microRNA (miRNA) sequencing to understand the different responses to gibberellin- and its inhibitor paclobutrazol- (PAC) mediated flower induction. Significant opposite cytological and morphological changes were observed in treated terminal buds, which led to a reduced flowering rate under gibberellin and an increased flowering rate under PAC. We also found that the differentially expressed mRNAs, miRNAs and miRNA target genes participated in different biological networks including hormones, photosynthesis, redox state and other metabolic processes, which provided important clues to understand the complex networks involved in apple flower induction. Additionally, we subsequently focused on one important candidate, MdSPL3, which is one of 31 apple SPL gene family members and whose transcription was inhibited by gibberellin but promoted by PAC. Functional investigation showed that MdSPL3 was located in the nucleus, and ectopic MdSPL3 activated floral meristem identity genes, promoted the formation of floral primordia and led to an earlier flowering phenotype in Arabidopsis. Our research identified critical mRNA and miRNA responsive to gibberellin or PAC, and provided a candidate framework for flower induction. This carefully orchestrated regulatory cross-talk highlighted potential targets for developing regulatory techniques and genetic improvement of flower induction in apple.
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Affiliation(s)
- Sheng Fan
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Dong Zhang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Cai Gao
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Shuyuan Wan
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Chao Lei
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Jue Wang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiya Zuo
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Feng Dong
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Youmei Li
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Kamran Shah
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Mingyu Han
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
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58
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Bai JF, Wang YK, Wang P, Yuan SH, Gao JG, Duan WJ, Wang N, Zhang FT, Zhang WJ, Qin MY, Zhao CP, Zhang LP. Genome-wide identification and analysis of the COI gene family in wheat (Triticum aestivum L.). BMC Genomics 2018; 19:754. [PMID: 30332983 PMCID: PMC6192174 DOI: 10.1186/s12864-018-5116-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 09/26/2018] [Indexed: 12/18/2022] Open
Abstract
Background COI (CORONATINE INSENSITIVE), an F-box component of the Skp1-Cullin-F-box protein (SCFCOI1) ubiquitin E3 ligase, plays important roles in the regulation of plant growth and development. Recent studies have shown that COIs are involved in pollen fertility. In this study, we identified and characterized COI genes in the wheat genome and analyzed expression patterns under abiotic stress. Results A total of 18 COI candidate sequences for 8 members of COI gene family were isolated in wheat (Triticum aestivum L.). Phylogenetic and structural analyses showed that these COI genes could be divided into seven distinct subfamilies. The COI genes showed high expression in stamens and glumes. The qRT-PCR results revealed that wheat COIs were involved in several abiotic stress responses and anther/glume dehiscence in the photoperiod-temperature sensitive genic male sterile (PTGMS) wheat line BS366. Conclusions The structural characteristics and expression patterns of the COI gene family in wheat as well as the stress-responsive and differential tissue-specific expression profiles of each TaCOI gene were examined in PTGMS wheat line BS366. In addition, we examined SA- and MeJA-induced gene expression in the wheat anther and glume to investigate the role of COI in the JA signaling pathway, involved in the regulation of abnormal anther dehiscence in the PTGMS wheat line. The results of this study contribute novel and detailed information about the TaCOI gene family in wheat and could be used as a benchmark for future studies of the molecular mechanisms of PTGMS in other crops. Electronic supplementary material The online version of this article (10.1186/s12864-018-5116-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jian-Fang Bai
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Yu-Kun Wang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China.,Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Peng Wang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Shao-Hua Yuan
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Jian-Gang Gao
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Wen-Jing Duan
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Na Wang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Feng-Ting Zhang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Wen-Jie Zhang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Meng-Ying Qin
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China.,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China
| | - Chang-Ping Zhao
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China. .,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China.
| | - Li-Ping Zhang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry, Beijing, 100097, China. .,The Municipal Key Laboratory of Molecular Genetic of Hybrid Wheat, Beijing, 10097, China.
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59
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Wei D, Liu M, Chen H, Zheng Y, Liu Y, Wang X, Yang S, Zhou M, Lin J. INDUCER OF CBF EXPRESSION 1 is a male fertility regulator impacting anther dehydration in Arabidopsis. PLoS Genet 2018; 14:e1007695. [PMID: 30286083 PMCID: PMC6191155 DOI: 10.1371/journal.pgen.1007695] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 10/16/2018] [Accepted: 09/13/2018] [Indexed: 11/23/2022] Open
Abstract
INDUCER OF CBF EXPRESSION 1 (ICE1) encodes a MYC-like basic helix-loop-helix (bHLH) transcription factor playing a critical role in plant responses to chilling and freezing stresses and leaf stomata development. However, no information connecting ICE1 and reproductive development has been reported. In this study, we show that ICE1 controls plant male fertility via impacting anther dehydration. The loss-of-function mutation in ICE1 gene in Arabidopsis caused anther indehiscence and decreased pollen viability as well as germination rate. Further analysis revealed that the anthers in the mutant of ICE1 (ice1-2) had the structure of stomium, though the epidermis did not shrink to dehisce. The anther indehiscence and influenced pollen viability as well as germination in ice1-2 were due to abnormal anther dehydration, for most of anthers dehisced with drought treatment and pollen grains from those dehydrated anthers had similar viability and germination rates compared with wild type. Accordingly, the sterility of ice1-2 could be rescued by ambient dehydration treatments. Likewise, the stomatal differentiation of ice1-2 anther epidermis was disrupted in a different manner compared with that in leaves. ICE1 specifically bound to MYC-recognition elements in the promoter of FAMA, a key regulator of guard cell differentiation, to activate FAMA expression. Transcriptome profiling in the anther tissues further exhibited ICE1-modulated genes associated with water transport and ion exchange in the anther. Together, this work reveals the key role of ICE1 in male fertility control and establishes a regulatory network mediated by ICE1 for stomata development and water movement in the anther.
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Affiliation(s)
- Donghui Wei
- State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Mingjia Liu
- State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Hu Chen
- State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Ye Zheng
- State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Yuxiao Liu
- State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Xi Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Shuhua Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Mingqi Zhou
- State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Juan Lin
- State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
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Hu Q, Zhu L, Zhang X, Guan Q, Xiao S, Min L, Zhang X. GhCPK33 Negatively Regulates Defense against Verticillium dahliae by Phosphorylating GhOPR3. PLANT PHYSIOLOGY 2018; 178:876-889. [PMID: 30150302 PMCID: PMC6181045 DOI: 10.1104/pp.18.00737] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 08/16/2018] [Indexed: 05/20/2023]
Abstract
Verticillium wilt, caused by the soil-borne fungus Verticillium dahliae, is a destructive vascular disease in plants. Approximately 200 dicotyledonous plant species in temperate and subtropical regions are susceptible to this notorious pathogen. Previous studies showed that jasmonic acid (JA) plays a crucial role in plant-V. dahliae interactions. V. dahliae infection generally induces significant JA accumulation in local and distal tissues of the plant. Although JA biosynthesis and the associated enzymes have been studied intensively, the precise mechanism regulating JA biosynthesis upon V. dahliae infection remains unknown. Here, we identified the calcium-dependent protein kinase GhCPK33 from upland cotton (Gossypium hirsutum) as a negative regulator of resistance to V. dahliae that directly manipulates JA biosynthesis. Knockdown of GhCPK33 by Agrobacterium tumefaciens-mediated virus-induced gene silencing constitutively activated JA biosynthesis and JA-mediated defense responses and enhanced resistance to V dahliae Further analysis revealed that GhCPK33 interacts with 12-oxophytodienoate reductase3 (GhOPR3) in peroxisomes. GhCPK33 phosphorylates GhOPR3 at threonine-246, leading to decreased stability of GhOPR3, which consequently limits JA biosynthesis. We propose that GhCPK33 is a potential molecular target for improving resistance to Verticillium wilt disease in cotton.
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Affiliation(s)
- Qin Hu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, 430070 Wuhan, Hubei, China
| | - Longfu Zhu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, 430070 Wuhan, Hubei, China
| | - Xiangnan Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, 430070 Wuhan, Hubei, China
| | - Qianqian Guan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, 430070 Wuhan, Hubei, China
| | - Shenghua Xiao
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, 430070 Wuhan, Hubei, China
| | - Ling Min
- College of Plant Science and Technology, Huazhong Agricultural University, 430070 Wuhan, Hubei, China
| | - Xianlong Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, 430070 Wuhan, Hubei, China
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Wasternack C, Strnad M. Jasmonates: News on Occurrence, Biosynthesis, Metabolism and Action of an Ancient Group of Signaling Compounds. Int J Mol Sci 2018; 19:E2539. [PMID: 30150593 PMCID: PMC6164985 DOI: 10.3390/ijms19092539] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/22/2018] [Accepted: 08/22/2018] [Indexed: 02/07/2023] Open
Abstract
: Jasmonic acid (JA) and its related derivatives are ubiquitously occurring compounds of land plants acting in numerous stress responses and development. Recent studies on evolution of JA and other oxylipins indicated conserved biosynthesis. JA formation is initiated by oxygenation of α-linolenic acid (α-LeA, 18:3) or 16:3 fatty acid of chloroplast membranes leading to 12-oxo-phytodienoic acid (OPDA) as intermediate compound, but in Marchantiapolymorpha and Physcomitrellapatens, OPDA and some of its derivatives are final products active in a conserved signaling pathway. JA formation and its metabolic conversion take place in chloroplasts, peroxisomes and cytosol, respectively. Metabolites of JA are formed in 12 different pathways leading to active, inactive and partially active compounds. The isoleucine conjugate of JA (JA-Ile) is the ligand of the receptor component COI1 in vascular plants, whereas in the bryophyte M. polymorpha COI1 perceives an OPDA derivative indicating its functionally conserved activity. JA-induced gene expressions in the numerous biotic and abiotic stress responses and development are initiated in a well-studied complex regulation by homeostasis of transcription factors functioning as repressors and activators.
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Affiliation(s)
- Claus Wasternack
- Department of Molecular Signal Processing, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany.
- Laboratory of Growth Regulators, Institute of Experimental Botany AS CR & Palacký University, Šlechtitelů 11, CZ-78371 Olomouc, Czech Republic.
| | - Miroslav Strnad
- Laboratory of Growth Regulators, Institute of Experimental Botany AS CR & Palacký University, Šlechtitelů 11, CZ-78371 Olomouc, Czech Republic.
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62
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Three-Dimensional Multiphoton Imaging of Transcription Factor by ClearSee. Methods Mol Biol 2018. [PMID: 30043375 DOI: 10.1007/978-1-4939-8657-6_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
In plants, transcription factors often act as cell-to-cell trafficking mobile proteins and specify cell fate. Thus, to visualize spatiotemporal expression pattern and localization of transcription factors are essential to understand their functions during development. Several protocols have been developed to observe fluorescent protein. However, plant-specific autofluorescent compounds and various tissue components with different refractive indexes interfere with detection of fluorescent signals of your interest. Furthermore, cell fate specification often occurs in a limited number of cells covered by lateral/layers of organs. To overcome those issues, the plant clearing method, ClearSee, was recently developed for high-resolution imaging inside tissues by making background transparent. In this chapter, we provide three-dimensional imaging of fluorescent-protein-fused transcription factors by two-photon excitation microscopy in Arabidopsis and rice. Complex cell patterning with gene expression could be observed from any direction three-dimensionally. This method could be applicable to visualize any protein of your interest or it can readily be adapted in various other plants.
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Niwa T, Suzuki T, Takebayashi Y, Ishiguro R, Higashiyama T, Sakakibara H, Ishiguro S. Jasmonic acid facilitates flower opening and floral organ development through the upregulated expression of SlMYB21 transcription factor in tomato. Biosci Biotechnol Biochem 2018; 82:292-303. [PMID: 29448919 DOI: 10.1080/09168451.2017.1422107] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Plants coordinate the timing of flower opening with pollen and gynoecium maturation to achieve successful pollination. However, little is known about how the coordination is executed. We found that flower bud development was paused immediately before flower opening in a jasmonic acid (JA)-insensitive tomato mutant, jai1-1. Phytohormone measurement and RNA analysis in flower buds revealed that newly synthesised JA peaked at two days before flower opening and the expression of a transcription factor gene SlMYB21 delayed in jai1-1. Buds of transgenic tomato plants expressing an artificial repressor, AtMYB24-SRDX, which was expected to impede the function of SlMYB21, aborted flower opening and resembled those of jai1-1. Furthermore, the AtMYB24-SRDX plants produced abnormal pollen grains deficient in germination and pistils that did not support pollen tube elongation. We concluded that JA facilitates the expression of SlMYB21, which coordinates flower opening, pollen maturation, and gynoecium function in tomato.
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Affiliation(s)
- Tomoko Niwa
- a Graduate School of Bio-agricultural Sciences , Nagoya University , Nagoya , Japan
| | - Takamasa Suzuki
- b College of Bioscience and Biotechnology , Chubu University , Kasugai , Japan
| | | | - Rie Ishiguro
- a Graduate School of Bio-agricultural Sciences , Nagoya University , Nagoya , Japan
| | - Tetsuya Higashiyama
- d Graduate School of Science , Nagoya University , Nagoya , Japan.,e Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Nagoya , Japan
| | - Hitoshi Sakakibara
- a Graduate School of Bio-agricultural Sciences , Nagoya University , Nagoya , Japan.,c RIKEN Center for Sustainable Resource Science , Yokohama , Japan
| | - Sumie Ishiguro
- a Graduate School of Bio-agricultural Sciences , Nagoya University , Nagoya , Japan
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Song S, Chen Y, Liu L, See YHB, Mao C, Gan Y, Yu H. OsFTIP7 determines auxin-mediated anther dehiscence in rice. NATURE PLANTS 2018; 4:495-504. [PMID: 29915329 DOI: 10.1038/s41477-018-0175-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 05/11/2018] [Indexed: 05/06/2023]
Abstract
Anther dehiscence determines successful sexual reproduction of flowering plants through timely release of pollen grains for pollination and fertilization. Downregulation of auxin levels during pollen mitosis is essential for promoting anther dehiscence along with pollen maturation. How this key transition of auxin levels is regulated in male organs remains elusive. Here, we report that the rice FT-INTERACTING PROTEIN 7 is highly expressed in anthers before pollen mitotic divisions and facilitates nuclear translocation of a homeodomain transcription factor, Oryza sativa homeobox 1, which directly suppresses a predominant auxin biosynthetic gene, OsYUCCA4, during the late development of anthers. This confers a key switch of auxin levels between meiosis of microspore mother cells and pollen mitotic divisions, thus controlling the timing of anther dehiscence during rice anthesis. Our findings shed light on the mechanism of hormonal control of anther dehiscence, and provide a new avenue for creating hormone-sensitive male sterile lines for hybrid plant breeding.
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Affiliation(s)
- Shiyong Song
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Ying Chen
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Lu Liu
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Yen How Benjamin See
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Chuanzao Mao
- College of Life Science, Zhejiang University, Hangzhou, China
| | - Yinbo Gan
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Hao Yu
- Department of Biological Sciences and Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore.
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Abstract
Plant oxylipins form a constantly growing group of signaling molecules that comprise oxygenated fatty acids and metabolites derived therefrom. In the last decade, the understanding of biosynthesis, metabolism, and action of oxylipins, especially jasmonates, has dramatically improved. Additional mechanistic insights into the action of enzymes and insights into signaling pathways have been deepened for jasmonates. For other oxylipins, such as the hydroxy fatty acids, individual signaling properties and cross talk between different oxylipins or even with additional phytohormones have recently been described. This review summarizes recent understanding of the biosynthesis, regulation, and function of oxylipins.
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Affiliation(s)
- Claus Wasternack
- Laboratory of Growth Regulators and Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University, CZ 78371 Olomouc, Czech Republic
- On leave from Department of Molecular Signal Processing, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany;
| | - Ivo Feussner
- Department of Plant Biochemistry, Albrecht-von-Haller-Institute for Plant Sciences and Goettingen Center for Molecular Biosciences (GZMB), University of Goettingen, 37077 Goettingen, Germany;
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66
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Han X, Hu Y, Zhang G, Jiang Y, Chen X, Yu D. Jasmonate Negatively Regulates Stomatal Development in Arabidopsis Cotyledons. PLANT PHYSIOLOGY 2018; 176:2871-2885. [PMID: 29496884 PMCID: PMC5884581 DOI: 10.1104/pp.17.00444] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 02/17/2018] [Indexed: 05/05/2023]
Abstract
Stomata are ports that facilitate gas and water vapor exchange between plants and their environment. Stomatal development is strictly regulated by endogenous signals and environmental cues. Jasmonate is an important signal that modulates multiple physiological processes in plants, yet the molecular mechanisms underlying its interactions with other developmental signaling pathways remain poorly understood. Here, we show that jasmonate negatively regulates stomatal development in Arabidopsis (Arabidopsis thaliana) cotyledons. Cotyledons of the wild type and stomata-overproliferating mutants (such as too many mouths-1 and stomatal density and distribution1-1) treated with methyl jasmonate exhibit a clear reduction in stomata number. By contrast, blocking endogenous jasmonate biosynthesis or perception enhanced stomatal development. Moreover, three MYC transcription factors involved in jasmonate signaling, MYC2, MYC3, and MYC4, were found to redundantly modulate jasmonate-inhibited stomatal development. A genetic analysis showed that these MYC proteins act upstream of the SPEECHLESS and FAMA transcription factors to mediate stomatal development. Furthermore, jasmonate repression of stomatal development is dependent on these three MYC transcription factors, as stomatal development of the myc2 myc3 myc4 triple mutant was insensitive to methyl jasmonate treatment. Collectively, our study demonstrates that jasmonate and MYC transcription factors negatively regulate stomatal development in Arabidopsis cotyledons.
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Affiliation(s)
- Xiao Han
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Yanru Hu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Gensong Zhang
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, China
| | - Yanjuan Jiang
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Xiaolan Chen
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650091, China
| | - Diqiu Yu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
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Wasternack C, Hause B. A Bypass in Jasmonate Biosynthesis - the OPR3-independent Formation. TRENDS IN PLANT SCIENCE 2018; 23:276-279. [PMID: 29530379 DOI: 10.1016/j.tplants.2018.02.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/19/2018] [Accepted: 02/26/2018] [Indexed: 05/29/2023]
Abstract
For the first time in 25 years, a new pathway for biosynthesis of jasmonic acid (JA) has been identified. JA production takes place via 12-oxo-phytodienoic acid (OPDA) including reduction by OPDA reductases (OPRs). A loss-of-function allele, opr3-3, revealed an OPR3-independent pathway converting OPDA to JA.
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Affiliation(s)
- Claus Wasternack
- Department of Molecular Signal Processing, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany; Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany AS CR & Palacký University, Šlechtitelů 11, CZ-78371 Olomouc, Czech Republic.
| | - Bettina Hause
- Department of Cell and Metabolic Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
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Hanchi M, Thibaud MC, Légeret B, Kuwata K, Pochon N, Beisson F, Cao A, Cuyas L, David P, Doerner P, Ferjani A, Lai F, Li-Beisson Y, Mutterer J, Philibert M, Raghothama KG, Rivasseau C, Secco D, Whelan J, Nussaume L, Javot H. The Phosphate Fast-Responsive Genes PECP1 and PPsPase1 Affect Phosphocholine and Phosphoethanolamine Content. PLANT PHYSIOLOGY 2018; 176:2943-2962. [PMID: 29475899 PMCID: PMC5884592 DOI: 10.1104/pp.17.01246] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 02/06/2018] [Indexed: 05/24/2023]
Abstract
Phosphate starvation-mediated induction of the HAD-type phosphatases PPsPase1 (AT1G73010) and PECP1 (AT1G17710) has been reported in Arabidopsis (Arabidopsis thaliana). However, little is known about their in vivo function or impact on plant responses to nutrient deficiency. The preferences of PPsPase1 and PECP1 for different substrates have been studied in vitro but require confirmation in planta. Here, we examined the in vivo function of both enzymes using a reverse genetics approach. We demonstrated that PPsPase1 and PECP1 affect plant phosphocholine and phosphoethanolamine content, but not the pyrophosphate-related phenotypes. These observations suggest that the enzymes play a similar role in planta related to the recycling of polar heads from membrane lipids that is triggered during phosphate starvation. Altering the expression of the genes encoding these enzymes had no effect on lipid composition, possibly due to compensation by other lipid recycling pathways triggered during phosphate starvation. Furthermore, our results indicated that PPsPase1 and PECP1 do not influence phosphate homeostasis, since the inactivation of these genes had no effect on phosphate content or on the induction of molecular markers related to phosphate starvation. A combination of transcriptomics and imaging analyses revealed that PPsPase1 and PECP1 display a highly dynamic expression pattern that closely mirrors the phosphate status. This temporal dynamism, combined with the wide range of induction levels, broad expression, and lack of a direct effect on Pi content and regulation, makes PPsPase1 and PECP1 useful molecular markers of the phosphate starvation response.
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Affiliation(s)
- Mohamed Hanchi
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Marie-Christine Thibaud
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Bertrand Légeret
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Keiko Kuwata
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
| | - Nathalie Pochon
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Fred Beisson
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Aiqin Cao
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47907
| | - Laura Cuyas
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Pascale David
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Peter Doerner
- School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Ali Ferjani
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo, Japan 184-8501
| | - Fan Lai
- School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Yonghua Li-Beisson
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Jérôme Mutterer
- Institute of Plant Molecular Biology, Centre National de la Recherche Scientifique, University of Strasbourg, 67084 Strasbourg, France
| | - Michel Philibert
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Kashchandra G Raghothama
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47907
| | - Corinne Rivasseau
- CEA, CNRS, INRA, Université Grenoble Alpes, Institut de Biosciences et Biotechnologies de Grenoble, UMR5168, Grenoble, France
| | - David Secco
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, Perth 6009 WA, Australia
| | - James Whelan
- Department of Animal, Plant, and Soil Science, School of Life Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora 3086, Australia
| | - Laurent Nussaume
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
| | - Hélène Javot
- Commissariat à l'Energie Atomique et aux Energies Alternatives, CNRS, Aix Marseille Université, UMR7265, Institut de Biosciences et Biotechnologies, Cadarache, 13108 St Paul Lez Durance, France
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69
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Borah P, Khurana JP. The OsFBK1 E3 Ligase Subunit Affects Anther and Root Secondary Cell Wall Thickenings by Mediating Turnover of a Cinnamoyl-CoA Reductase. PLANT PHYSIOLOGY 2018; 176:2148-2165. [PMID: 29295941 PMCID: PMC5841686 DOI: 10.1104/pp.17.01733] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 12/29/2017] [Indexed: 05/20/2023]
Abstract
Regulated proteolysis by the ubiquitin-26S proteasome system challenges transcription and phosphorylation in magnitude and is one of the most important regulatory mechanisms in plants. This article describes the characterization of a rice (Oryza sativa) auxin-responsive Kelch-domain-containing F-box protein, OsFBK1, found to be a component of an SCF E3 ligase by interaction studies in yeast. Rice transgenics of OsFBK1 displayed variations in anther and root secondary cell wall content; it could be corroborated by electron/confocal microscopy and lignification studies, with no apparent changes in auxin content/signaling pathway. The presence of U-shaped secondary wall thickenings (or lignin) in the anthers were remarkably less pronounced in plants overexpressing OsFBK1 as compared to wild-type and knockdown transgenics. The roots of the transgenics also displayed differential accumulation of lignin. Yeast two-hybrid anther library screening identified an OsCCR that is a homolog of the well-studied Arabidopsis (Arabidopsis thaliana) IRX4; OsFBK1-OsCCR interaction was confirmed by fluorescence and immunoprecipitation studies. Degradation of OsCCR mediated by SCFOsFBK1 and the 26S proteasome pathway was validated by cell-free experiments in the absence of auxin, indicating that the phenotype observed is due to the direct interaction between OsFBK1 and OsCCR. Interestingly, the OsCCR knockdown transgenics also displayed a decrease in root and anther lignin depositions, suggesting that OsFBK1 plays a role in the development of rice anthers and roots by regulating the cellular levels of a key enzyme controlling lignification.
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Affiliation(s)
- Pratikshya Borah
- Interdisciplinary Centre for Plant Genomics and Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi 110021, India
| | - Jitendra P Khurana
- Interdisciplinary Centre for Plant Genomics and Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi 110021, India
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He H, Bai M, Tong P, Hu Y, Yang M, Wu H. CELLULASE6 and MANNANASE7 Affect Cell Differentiation and Silique Dehiscence. PLANT PHYSIOLOGY 2018; 176:2186-2201. [PMID: 29348141 PMCID: PMC5841693 DOI: 10.1104/pp.17.01494] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 01/09/2018] [Indexed: 05/22/2023]
Abstract
Cellulases, hemicellulases, and pectinases play important roles in fruit development and maturation. Although mutants with defects in these processes have not been reported for cellulase or hemicellulase genes, the pectinases ARABIDOPSIS DEHISCENCE ZONE POLYGALACTURONASE1 (ADPG1) and ADPG2 were previously shown to be essential for silique dehiscence in Arabidopsis (Arabidopsis thaliana). Here, we demonstrate that the cellulase gene CELLULASE6 (CEL6) and the hemicellulase gene MANNANASE7 (MAN7) function in the development and dehiscence of Arabidopsis siliques. We found that these genes were expressed in both vegetative and reproductive organs and that their expression in the silique partially depended on the INDEHISCENT and ALCATRAZ transcription factors. Cell differentiation was delayed in the dehiscence zone of cel6 and man7 mutant siliques at early flower development stage 17, and a comparison of the spatio-temporal patterns of CEL6 and MAN7 expression with the locations of delayed cell differentiation in the cel6 and man7 mutants revealed that CEL6 and MAN7 likely indirectly affect the timing of cell differentiation in the silique valve at this stage. CEL6 and MAN7 were also found to promote cell degeneration in the separation layer in nearly mature siliques, as cells in this layer remained intact in the cel6 and man7 mutants and the cel6-1 man7-3 double mutant, whereas they degenerated in the wild-type control. Phenotypic studies of single, double, triple, and quadruple mutants revealed that higher-order mutant combinations of cel6-1, man7-3, and adpg1-1 and adpg2-1 produced more severe silique indehiscent phenotypes than the corresponding lower-order mutant combinations, except for some combinations involving cel6-1, man7-3, and adpg2-1 Our results demonstrate that the ability of the silique to dehisce can be manipulated to different degrees by altering the activities of various cell wall-modifying enzymes.
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Affiliation(s)
- Hanjun He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
- Department of Plant Biology, Ecology, and Evolution, Oklahoma State University, Stillwater, Oklahoma 74078
| | - Mei Bai
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
| | - Panpan Tong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
| | - Yanting Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
| | - Ming Yang
- Department of Plant Biology, Ecology, and Evolution, Oklahoma State University, Stillwater, Oklahoma 74078
| | - Hong Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China
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71
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Lei C, Fan S, Li K, Meng Y, Mao J, Han M, Zhao C, Bao L, Zhang D. iTRAQ-Based Proteomic Analysis Reveals Potential Regulation Networks of IBA-Induced Adventitious Root Formation in Apple. Int J Mol Sci 2018; 19:ijms19030667. [PMID: 29495482 PMCID: PMC5877528 DOI: 10.3390/ijms19030667] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/14/2018] [Accepted: 02/22/2018] [Indexed: 01/19/2023] Open
Abstract
Adventitious root (AR) formation, which is controlled by endogenous and environmental factors, is indispensable for vegetative asexual propagation. However, comprehensive proteomic data on AR formation are still lacking. The aim of this work was to study indole-3-butyric acid (IBA)-induced AR formation in the dwarf apple rootstock 'T337'. In this study, the effect of IBA on AR formation was analysed. Subsequent to treatment with IBA, both the rooting rate and root length of 'T337' increased significantly. An assessment of hormone levels in basal stem cuttings suggested that auxin, abscisic acid, and brassinolide were higher in basal stem cuttings that received the exogenous IBA application; while zeatin riboside, gibberellins, and jasmonic acid were lower than non-treated basal stem cuttings. To explore the underlying molecular mechanism, an isobaric tags for relative and absolute quantification (iTRAQ)-based proteomic technique was employed to identify the expression profiles of proteins at a key period of adventitious root induction (three days after IBA treatment). In total, 3355 differentially expressed proteins (DEPs) were identified. Many DEPs were closely related to carbohydrate metabolism and energy production, protein homeostasis, reactive oxygen and nitric oxide signaling, and cell wall remodeling biological processes; as well as the phytohormone signaling, which was the most critical process in response to IBA treatment. Further, RT-qPCR analysis was used to evaluate the expression level of nine genes that are involved in phytohormone signaling and their transcriptional levels were mostly in accordance with the protein patterns. Finally, a putative work model was proposed. Our study establishes a foundation for further research and sheds light on IBA-mediated AR formation in apple as well as other fruit rootstock cuttings.
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Affiliation(s)
- Chao Lei
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Sheng Fan
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Ke Li
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Yuan Meng
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Jiangping Mao
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Mingyu Han
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Caiping Zhao
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Lu Bao
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Dong Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
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Yu X, Chen G, Tang B, Zhang J, Zhou S, Hu Z. The Jasmonate ZIM-domain protein gene SlJAZ2 regulates plant morphology and accelerates flower initiation in Solanum lycopersicum plants. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 267:65-73. [PMID: 29362100 DOI: 10.1016/j.plantsci.2017.11.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 11/13/2017] [Accepted: 11/16/2017] [Indexed: 05/07/2023]
Abstract
JAZ (Jasmonate ZIM-domain) proteins are important repressors in JA signaling pathway. JAZs were proved taking part in various development processes and resistance to biotic and abiotic stresses in Arabiodopsis. However, in tomato, the functional study of JAZs is rare, especially on plant growth and development. Here, a typical tomato JAZ gene, SlJAZ2 was isolated. Tomato plants overexpressing SlJAZ2 exhibited quicker leaf initiation, reduced plant height and internode length, decreasing trichomes, earlier lateral bud emergence and advanced flowering transition. Further experiments showed that the pith cells in transgenic plant stem were much smaller than wild-type and the genes related to cell elongation and gibberellin biosynthesis were down-regulated. Genes mediating trichome formation were also inhibited in plant stem epidermis. In addition, the flower initiation of transgenic plants were earlier and genes controlling flowering time were up-regulated significantly after SlJAZ2 was overexpressed. Our research demonstrates that SlJAZ2 accelerates the transition from vegetative growth to reproductive growth.
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Affiliation(s)
- Xiaohui Yu
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, People's Republic of China.
| | - Guoping Chen
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, People's Republic of China.
| | - Boyan Tang
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, People's Republic of China.
| | - Jianling Zhang
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, People's Republic of China.
| | - Shengen Zhou
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, People's Republic of China.
| | - Zongli Hu
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, People's Republic of China.
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Li X, Wang Y, Duan E, Qi Q, Zhou K, Lin Q, Wang D, Wang Y, Long W, Zhao Z, Cheng Z, Lei C, Zhang X, Guo X, Wang J, Wu C, Jiang L, Wang C, Wan J. OPEN GLUME1: a key enzyme reducing the precursor of JA, participates in carbohydrate transport of lodicules during anthesis in rice. PLANT CELL REPORTS 2018; 37:329-346. [PMID: 29177846 DOI: 10.1007/s00299-017-2232-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 11/01/2017] [Indexed: 06/07/2023]
Abstract
OG1 is involved in JA-regulated anthesis by modulating carbohydrate transport of lodicules in rice. Flowering plants have evolved a sophisticated regulatory network to coordinate anthesis and maximize reproductive success. In addition to various environmental conditions, the plant hormone jasmonic acid and its derivatives (JAs) are involved in anthesis. However, the underlying mechanism remains largely unexplored. Here, we report a JA-defective mutant in rice (Oryza sativa), namely open glume 1, which has dysfunctional lodicules that lead to open glumes following anthesis. Map-based cloning and subsequent complementation tests confirmed that OG1 encodes a peroxisome-localized 12-oxo-phytodienoic acid reductase-a key enzyme that reduces the precursor of JA. Loss-of-function of OG1 resulted in almost no JA accumulation. Exogenous JA treatment completely rescued the defects caused by the og1 mutation. Further studies revealed that intracellular metabolism was disrupted in the lodicules of og1 mutant. At the mature plant stage, most seeds of the mutant were malformed with significantly reduced starch content. We speculate that JA or JA signaling mediates the carbohydrate transport of lodicules during anthesis, and signal the onset of cell degradation in lodicules after anthesis. We conclude that the OPEN GLUME 1 gene that produces a key enzyme involved in reducing the precursor of JA in JA biosynthesis and is involved in carbohydrate transport underlying normal lodicule function during anthesis in rice.
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Affiliation(s)
- Xiaohui Li
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Yihua Wang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Erchao Duan
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Qi Qi
- College of Life Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Kunneng Zhou
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Qiuyun Lin
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Di Wang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Yunlong Wang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Wuhua Long
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Zhigang Zhao
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Zhijun Cheng
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Cailin Lei
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Xin Zhang
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Xiuping Guo
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Jiulin Wang
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Chuanyin Wu
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
| | - Ling Jiang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Chunming Wang
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Jianmin Wan
- State Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.
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Chini A, Monte I, Zamarreño AM, Hamberg M, Lassueur S, Reymond P, Weiss S, Stintzi A, Schaller A, Porzel A, García-Mina JM, Solano R. An OPR3-independent pathway uses 4,5-didehydrojasmonate for jasmonate synthesis. Nat Chem Biol 2018; 14:171-178. [PMID: 29291349 DOI: 10.1038/nchembio.2540] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 11/09/2017] [Indexed: 01/16/2023]
Abstract
Biosynthesis of the phytohormone jasmonoyl-isoleucine (JA-Ile) requires reduction of the JA precursor 12-oxo-phytodienoic acid (OPDA) by OPDA reductase 3 (OPR3). Previous analyses of the opr3-1 Arabidopsis mutant suggested an OPDA signaling role independent of JA-Ile and its receptor COI1; however, this hypothesis has been challenged because opr3-1 is a conditional allele not completely impaired in JA-Ile biosynthesis. To clarify the role of OPR3 and OPDA in JA-independent defenses, we isolated and characterized a loss-of-function opr3-3 allele. Strikingly, opr3-3 plants remained resistant to necrotrophic pathogens and insect feeding, and activated COI1-dependent JA-mediated gene expression. Analysis of OPDA derivatives identified 4,5-didehydro-JA in wounded wild-type and opr3-3 plants. OPR2 was found to reduce 4,5-didehydro-JA to JA, explaining the accumulation of JA-Ile and activation of JA-Ile-responses in opr3-3 mutants. Our results demonstrate that in the absence of OPR3, OPDA enters the β-oxidation pathway to produce 4,5-ddh-JA as a direct precursor of JA and JA-Ile, thus identifying an OPR3-independent pathway for JA biosynthesis.
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Affiliation(s)
- Andrea Chini
- Department of Plant Molecular Genetics, National Centre for Biotechnology, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Isabel Monte
- Department of Plant Molecular Genetics, National Centre for Biotechnology, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Angel M Zamarreño
- Environmental Biology Department, University of Navarra, Navarre, Spain
| | - Mats Hamberg
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Steve Lassueur
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Philippe Reymond
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Sally Weiss
- Institute of Plant Physiology and Biotechnology, University of Hohenheim, Stuttgart, Germany
| | - Annick Stintzi
- Institute of Plant Physiology and Biotechnology, University of Hohenheim, Stuttgart, Germany
| | - Andreas Schaller
- Institute of Plant Physiology and Biotechnology, University of Hohenheim, Stuttgart, Germany
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Halle, Germany
| | | | - Roberto Solano
- Department of Plant Molecular Genetics, National Centre for Biotechnology, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
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75
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Hu TH, Lung SC, Ye ZW, Chye ML. Depletion of Arabidopsis ACYL-COA-BINDING PROTEIN3 Affects Fatty Acid Composition in the Phloem. FRONTIERS IN PLANT SCIENCE 2018; 9:2. [PMID: 29422909 PMCID: PMC5789640 DOI: 10.3389/fpls.2018.00002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 01/03/2018] [Indexed: 05/05/2023]
Abstract
Oxylipins are crucial components in plant wound responses that are mobilised via the plant vasculature. Previous studies have shown that the overexpression of an Arabidopsis acyl-CoA-binding protein, AtACBP3, led to an accumulation of oxylipin-containing galactolipids, and AtACBP3pro::BETA-GLUCURONIDASE (GUS) was expressed in the phloem of transgenic Arabidopsis. To investigate the role of AtACBP3 in the phloem, reverse transcription-polymerase chain reaction and western blot analysis of phloem exudates from the acbp3 mutant and wild type revealed that the AtACBP3 protein, but not its mRNA, was detected in the phloem sap. Furthermore, micrografting demonstrated that AtACBP3 expressed from the 35S promoter was translocated from shoot to root. Subsequently, AtACBP3 was localised to the companion cells, sieve elements and the apoplastic space of phloem tissue by immunogold electron microscopy using anti-AtACBP3 antibodies. AtACBP3pro::GUS was induced locally in Arabidopsis leaves upon wounding, and the expression of wound-responsive jasmonic acid marker genes (JASMONATE ZIM-DOMAIN10, VEGETATIVE STORAGE PROTEIN2, and LIPOXYGENASE2) increased more significantly in both locally wounded and systemic leaves of the wild type in comparison to acbp3 and AtACBP3-RNAi. Oxylipin-related fatty acid (FA) (C18:2-FA, C18:3-FA and methyl jasmonate) content was observed to be lower in acbp3 and AtACBP3-RNAi than wild-type phloem exudates using gas chromatography-mass spectrometry. Experiments using recombinant AtACBP3 in isothermal titration calorimetry analysis showed that medium- and long-chain acyl-CoA esters bind (His)6-AtACBP3 with KD values in the micromolar range. Taken together, these results suggest that AtACBP3 is likely to be a phloem-mobile protein that affects the FA pool and jasmonate content in the phloem, possibly by its binding to acyl-CoA esters.
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Abstract
Plant peroxisomes are required for a number of fundamental physiological processes, such as primary and secondary metabolism, development and stress response. Indexing the dynamic peroxisome proteome is prerequisite to fully understanding the importance of these organelles. Mass Spectrometry (MS)-based proteome analysis has allowed the identification of novel peroxisomal proteins and pathways in a relatively high-throughput fashion and significantly expanded the list of proteins and biochemical reactions in plant peroxisomes. In this chapter, we summarize the experimental proteomic studies performed in plants, compile a list of ~200 confirmed Arabidopsis peroxisomal proteins, and discuss the diverse plant peroxisome functions with an emphasis on the role of Arabidopsis MS-based proteomics in discovering new peroxisome functions. Many plant peroxisome proteins and biochemical pathways are specific to plants, substantiating the complexity, plasticity and uniqueness of plant peroxisomes. Mapping the full plant peroxisome proteome will provide a knowledge base for the improvement of crop production, quality and stress tolerance.
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Affiliation(s)
- Ronghui Pan
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, 48824, USA
| | - Jianping Hu
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, 48824, USA.
- Plant Biology Department, Michigan State University, East Lansing, MI, 48824, USA.
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77
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Liu L, Jiang Y, Zhang X, Wang X, Wang Y, Han Y, Coupland G, Jin JB, Searle I, Fu YF, Chen F. Two SUMO Proteases SUMO PROTEASE RELATED TO FERTILITY1 and 2 Are Required for Fertility in Arabidopsis. PLANT PHYSIOLOGY 2017; 175:1703-1719. [PMID: 29066667 PMCID: PMC5717720 DOI: 10.1104/pp.17.00021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 10/22/2017] [Indexed: 05/21/2023]
Abstract
In plants, the posttranslational modification small ubiquitin-like modifier (SUMO) is involved in regulating several important developmental and cellular processes, including flowering time control and responses to biotic and abiotic stresses. Here, we report two proteases, SUMO PROTEASE RELATED TO FERTILITY1 (SPF1) and SPF2, that regulate male and female gamete and embryo development and remove SUMO from proteins in vitro and in vivo. spf1 mutants exhibit abnormal floral structures and embryo development, while spf2 mutants exhibit largely a wild-type phenotype. However, spf1 spf2 double mutants exhibit severe abnormalities in microgametogenesis, megagametogenesis, and embryo development, suggesting that the two genes are functionally redundant. Mutation of SPF1 and SPF2 genes also results in misexpression of generative- and embryo-specific genes. In vitro, SPF1 and SPF2 process SUMO1 precursors into a mature form, and as expected in vivo, spf1 and spf2 mutants accumulate SUMO conjugates. Using a yeast two-hybrid screen, we identified EMBRYO SAC DEVELOPMENT ARREST9 (EDA9) as an SPF1-interacting protein. In vivo, we demonstrate that EDA9 is sumolyated and that, in spf1 mutants, EDA9-SUMO conjugates increase in abundance, demonstrating that EDA9 is a substrate of SPF1. Together, our results demonstrate that SPF1 and SPF2 are two SUMO proteases important for plant development in Arabidopsis (Arabidopsis thaliana).
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Affiliation(s)
- Linpo Liu
- MOA Key Laboratory of Soybean Biology (Beijing), National Key Facility of Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, 100081 Beijing, People's Republic of China
- College of Biological Sciences, State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, 100094 Beijing, People's Republic of China
| | - Ying Jiang
- MOA Key Laboratory of Soybean Biology (Beijing), National Key Facility of Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, 100081 Beijing, People's Republic of China
- College of Biological Sciences, State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, 100094 Beijing, People's Republic of China
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agricultural and Forestry Sciences, 100097 Beijing, People's Republic of China
| | - Xiaomei Zhang
- MOA Key Laboratory of Soybean Biology (Beijing), National Key Facility of Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, 100081 Beijing, People's Republic of China
| | - Xu Wang
- MOA Key Laboratory of Soybean Biology (Beijing), National Key Facility of Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, 100081 Beijing, People's Republic of China
| | - Yanbing Wang
- College of Life Sciences, Peking University, 100871 Beijing, People's Republic of China
| | - Yuzhen Han
- College of Biological Sciences, State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, 100094 Beijing, People's Republic of China
| | - George Coupland
- Max Planck Institute for Plant Breeding, D-50829 Cologne, Germany
| | - Jing Bo Jin
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, 100093 Beijing, People's Republic of China
| | - Iain Searle
- School of Biological Sciences, University of Adelaide-Shanghai Jiao Tong University Joint Centre for Agriculture and Health, University of Adelaide, Adelaide 5005, Australia
| | - Yong-Fu Fu
- MOA Key Laboratory of Soybean Biology (Beijing), National Key Facility of Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, 100081 Beijing, People's Republic of China
| | - Fulu Chen
- MOA Key Laboratory of Soybean Biology (Beijing), National Key Facility of Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, 100081 Beijing, People's Republic of China
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78
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Shukla P, Singh NK, Gautam R, Ahmed I, Yadav D, Sharma A, Kirti PB. Molecular Approaches for Manipulating Male Sterility and Strategies for Fertility Restoration in Plants. Mol Biotechnol 2017; 59:445-457. [PMID: 28791615 DOI: 10.1007/s12033-017-0027-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Usable pollination control systems have proven to be effective system for the development of hybrid crop varieties, which are important for optimal performance over varied environments and years. They also act as a biocontainment to check horizontal transgene flow. In the last two decades, many genetic manipulations involving genes controlling the production of cytotoxic products, conditional male sterility, altering metabolic processes, post-transcriptional gene silencing, RNA editing and chloroplast engineering methods have been used to develop a proper pollination control system. In this review article, we outline the approaches used for generating male sterile plants using an effective pollination control system to highlight the recent progress that occurred in this area. Furthermore, we propose possible future directions for biotechnological improvements that will allow the farmers to buy hybrid seed once for many generations in a cost-effective manner.
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Affiliation(s)
- Pawan Shukla
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India.
- Central Sericultural Research and Training Institute, Central Silk Board, NH-1A, Gallandar, Pampore, J & K, 192 121, India.
| | - Naveen Kumar Singh
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India
- Agricultural Research Organization-The Volcani Center, 68 HaMaccabim Road, P.O.B 15159, 7505101, Rishon LeZion, Israel
| | - Ranjana Gautam
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Israr Ahmed
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Deepanker Yadav
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Akanksha Sharma
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India
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79
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Kurusu T, Koyano T, Kitahata N, Kojima M, Hanamata S, Sakakibara H, Kuchitsu K. Autophagy-mediated regulation of phytohormone metabolism during rice anther development. PLANT SIGNALING & BEHAVIOR 2017; 12:e1365211. [PMID: 28873038 PMCID: PMC5640179 DOI: 10.1080/15592324.2017.1365211] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/04/2017] [Indexed: 05/18/2023]
Abstract
Autophagy has recently been shown to be required for postmeiotic anther development including anther dehiscence, programmed cell death-mediated degradation of the tapetum and pollen maturation in rice. Several phytohormones are known to play essential roles during male reproductive development including pollen maturation. However, the relationship between phytohormone metabolism and autophagy in plant reproductive development is unknown. We here comprehensively analyzed the effect of autophagy disruption on phytohormone contents in rice anthers at the flowering stage, and found that endogenous levels of active-forms of gibberellins (GAs) and cytokinin, trans-zeatin, were significantly lower in the autophagy-defective mutant, Osatg7-1, than in the wild type. Treatment with GA4 partially recovered maturation of the mutant pollens, but did not recover the limited anther dehiscence as well as sterility phenotype. These results suggest that autophagy affects metabolism and endogenous levels of GAs and cytokinin in rice anthers. Reduction in bioactive GAs in the autophagy-deficient mutant may partially explain the defects in pollen maturation of the autophagy-deficient mutant, but tapetal autophagy also plays other specific roles in fertilization.
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Affiliation(s)
- Takamitsu Kurusu
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Tomoko Koyano
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Nobutaka Kitahata
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
- Imaging Frontier Center, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Mikiko Kojima
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource Science Yokohama, Japan
| | - Shigeru Hanamata
- Imaging Frontier Center, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
| | - Hitoshi Sakakibara
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource Science Yokohama, Japan
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
- Imaging Frontier Center, Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
- CONTACT Dr. Kazuyuki Kuchitsu Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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80
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Ding Y, Ma Y, Liu N, Xu J, Hu Q, Li Y, Wu Y, Xie S, Zhu L, Min L, Zhang X. microRNAs involved in auxin signalling modulate male sterility under high-temperature stress in cotton (Gossypium hirsutum). THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017. [PMID: 28635129 DOI: 10.1111/tpj.13620] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Male sterility caused by long-term high-temperature (HT) stress occurs widely in crops. MicroRNAs (miRNAs), a class of endogenous non-coding small RNAs, play an important role in the plant response to various abiotic stresses. To dissect the working principle of miRNAs in male sterility under HT stress in cotton, a total of 112 known miRNAs, 270 novel miRNAs and 347 target genes were identified from anthers of HT-insensitive (84021) and HT-sensitive (H05) cotton cultivars under normal-temperature and HT conditions through small RNA and degradome sequencing. Quantitative reverse transcriptase-polymerase chain reaction and 5'-RNA ligase-mediated rapid amplification of cDNA ends experiments were used to validate the sequencing data. The results show that miR156 was suppressed by HT stress in both 84021 and H05; miR160 was suppressed in 84021 but induced in H05. Correspondingly, SPLs (target genes of miR156) were induced both in 84021 and H05; ARF10 and ARF17 (target genes of miR160) were induced in 84021 but suppressed in H05. Overexpressing miR160 increased cotton sensitivity to HT stress seen as anther indehiscence, associated with the suppression of ARF10 and ARF17 expression, thereby activating the auxin response that leads to anther indehiscence. Supporting this role for auxin, exogenous Indole-3-acetic acid (IAA) leads to a stronger male sterility phenotype both in 84021 and H05 under HT stress. Cotton plants overexpressing miR157 suppressed the auxin signal, and also showed enhanced sensitivity to HT stress, with microspore abortion and anther indehiscence. Thus, we propose that the auxin signal, mediated by miRNAs, is essential for cotton anther fertility under HT stress.
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Affiliation(s)
- Yuanhao Ding
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yizan Ma
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Nian Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jiao Xu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qin Hu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yaoyao Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuanlong Wu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Sai Xie
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Longfu Zhu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Ling Min
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xianlong Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
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81
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Liu L, Zou Z, Qian K, Xia C, He Y, Zeng H, Zhou X, Riemann M, Yin C. Jasmonic acid deficiency leads to scattered floret opening time in cytoplasmic male sterile rice Zhenshan 97A. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:4613-4625. [PMID: 28981770 PMCID: PMC5853226 DOI: 10.1093/jxb/erx251] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 07/10/2017] [Indexed: 05/22/2023]
Abstract
Cytoplasmic male sterile (CMS) rice has been widely used for hybrid rice seed production in China. However, CMS rice suffers from undesirable flowering habits including scattered floret opening time (FOT), which causes different FOTs among parental rice plants and greatly reduces hybrid rice seed production. Little is known about the mechanism of scattered FOT in CMS rice. Our results demonstrate that scattered FOT in CMS rice Zhenshan 97A (ZS97A) resulted from the lack of a driving force to open florets, which was directly caused by retarded lodicule expansion. Our results indicate that retarded lodicule expansion in ZS97A was caused by reduced water accumulation due to retarded accumulation of osmotic regulation substances (ORSs). Further, the retardation in accumulation of ORSs and water were caused by jasmonic acid (JA) deficiency, resulting from down-regulation of OsAOC expression. Applying JA restored scattered FOT in ZS97A by promoting ORS and water accumulation, and inducing the expansion of the lodicules. Taken together, JA deficiency inhibited lodicule expansion by retarding the accumulation of ORSs and water, leading to scattered FOT in CMS rice ZS97A.
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Affiliation(s)
- Li Liu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Zhengshan Zou
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Ke Qian
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Chan Xia
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Ying He
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hanlai Zeng
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xie Zhou
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Michael Riemann
- Botanical Institute, Molecular Cell Biology, Karlsruhe Institute of Technology (CS), Kaiserstr, Karlsruhe, Germany
| | - Changxi Yin
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
- Correspondence:
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82
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Ionescu IA, López-Ortega G, Burow M, Bayo-Canha A, Junge A, Gericke O, Møller BL, Sánchez-Pérez R. Transcriptome and Metabolite Changes during Hydrogen Cyanamide-Induced Floral Bud Break in Sweet Cherry. FRONTIERS IN PLANT SCIENCE 2017; 8:1233. [PMID: 28769948 PMCID: PMC5511853 DOI: 10.3389/fpls.2017.01233] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/29/2017] [Indexed: 05/04/2023]
Abstract
Release of bud dormancy in perennial woody plants is a temperature-dependent process and thus flowering in these species is heavily affected by climate change. The lack of cold winters in temperate growing regions often results in reduced flowering and low fruit yields. This is likely to decrease the availability of fruits and nuts of the Prunus spp. in the near future. In order to maintain high yields, it is crucial to gain detailed knowledge on the molecular mechanisms controlling the release of bud dormancy. Here, we studied these mechanisms using sweet cherry (Prunus avium L.), a crop where the agrochemical hydrogen cyanamide (HC) is routinely used to compensate for the lack of cold winter temperatures and to induce flower opening. In this work, dormant flower buds were sprayed with hydrogen cyanamide followed by deep RNA sequencing, identifying three main expression patterns in response to HC. These transcript level results were validated by quantitative real time polymerase chain reaction and supported further by phytohormone profiling (ABA, SA, IAA, CK, ethylene, JA). Using these approaches, we identified the most up-regulated pathways: the cytokinin pathway, as well as the jasmonate and the hydrogen cyanide pathway. Our results strongly suggest an inductive effect of these metabolites in bud dormancy release and provide a stepping stone for the characterization of key genes in bud dormancy release.
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Affiliation(s)
- Irina A. Ionescu
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of CopenhagenFrederiksberg, Denmark
- VILLUM Center for Plant Plasticity, University of CopenhagenFrederiksberg, Denmark
| | | | - Meike Burow
- DynaMo Center, University of CopenhagenFrederiksberg, Denmark
| | | | - Alexander Junge
- Center for Non-coding RNA in Technology and Health, Department of Veterinary Clinical and Animal Sciences, University of CopenhagenFrederiksberg, Denmark
| | - Oliver Gericke
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of CopenhagenFrederiksberg, Denmark
| | - Birger L. Møller
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of CopenhagenFrederiksberg, Denmark
- VILLUM Center for Plant Plasticity, University of CopenhagenFrederiksberg, Denmark
| | - Raquel Sánchez-Pérez
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of CopenhagenFrederiksberg, Denmark
- VILLUM Center for Plant Plasticity, University of CopenhagenFrederiksberg, Denmark
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83
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Gonzalez LE, Keller K, Chan KX, Gessel MM, Thines BC. Transcriptome analysis uncovers Arabidopsis F-BOX STRESS INDUCED 1 as a regulator of jasmonic acid and abscisic acid stress gene expression. BMC Genomics 2017; 18:533. [PMID: 28716048 PMCID: PMC5512810 DOI: 10.1186/s12864-017-3864-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 06/15/2017] [Indexed: 01/14/2023] Open
Abstract
Background The ubiquitin 26S proteasome system (UPS) selectively degrades cellular proteins, which results in physiological changes to eukaryotic cells. F-box proteins are substrate adaptors within the UPS and are responsible for the diversity of potential protein targets. Plant genomes are enriched in F-box genes, but the vast majority of these have unknown roles. This work investigated the Arabidopsis F-box gene F-BOX STRESS INDUCED 1 (FBS1) for its effects on gene expression in order elucidate its previously unknown biological function. Results Using publically available Affymetrix ATH1 microarray data, we show that FBS1 is significantly co-expressed in abiotic stresses with other well-characterized stress response genes, including important stress-related transcriptional regulators. This gene suite is most highly expressed in roots under cold and salt stresses. Transcriptome analysis of fbs1–1 knock-out plants grown at a chilling temperature shows that hundreds of genes require FBS1 for appropriate expression, and that these genes are enriched in those having roles in both abiotic and biotic stress responses. Based on both this genome-wide expression data set and quantitative real-time PCR (qPCR) analysis, it is apparent that FBS1 is required for elevated expression of many jasmonic acid (JA) genes that have established roles in combatting environmental stresses, and that it also controls a subset of JA biosynthesis genes. FBS1 also significantly impacts abscisic acid (ABA) regulated genes, but this interaction is more complex, as FBS1 has both positive and negative effects on ABA-inducible and ABA-repressible gene modules. One noteworthy effect of FBS1 on ABA-related stress processes, however, is the restraint it imposes on the expression of multiple class I LIPID TRANSFER PROTEIN (LTP) gene family members that have demonstrated protective effects in water deficit-related stresses. Conclusion FBS1 impacts plant stress responses by regulating hundreds of genes that respond to the plant stress hormones JA and ABA. The positive effect that FBS1 has on JA processes and the negative effect it has on at least some ABA processes indicates that it in part regulates cellular responses balanced between these two important stress hormones. More broadly then, FBS1 may aid plant cells in switching between certain biotic (JA) and abiotic (ABA) stress responses. Finally, because FBS1 regulates a subset of JA biosynthesis and response genes, we conclude that it might have a role in tuning hormone responses to particular circumstances at the transcriptional level. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3864-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lauren E Gonzalez
- Keck Science Department, Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, CA, 91711, USA.,Present address: Department of Genetics, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Kristen Keller
- Keck Science Department, Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, CA, 91711, USA.,Present address: Department of Biostatistics, UCLA Fielding School of Public Health, Los Angeles, CA, 90095, USA
| | - Karen X Chan
- Keck Science Department, Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, CA, 91711, USA
| | - Megan M Gessel
- Chemistry Department, University of Puget Sound, Tacoma, WA, 98416, USA
| | - Bryan C Thines
- Biology Department, University of Puget Sound, Tacoma, WA, 98416, USA.
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Campos-Rivero G, Osorio-Montalvo P, Sánchez-Borges R, Us-Camas R, Duarte-Aké F, De-la-Peña C. Plant hormone signaling in flowering: An epigenetic point of view. JOURNAL OF PLANT PHYSIOLOGY 2017; 214:16-27. [PMID: 28419906 DOI: 10.1016/j.jplph.2017.03.018] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 03/06/2017] [Accepted: 03/29/2017] [Indexed: 05/19/2023]
Abstract
Reproduction is one of the most important phases in an organism's lifecycle. In the case of angiosperm plants, flowering provides the major developmental transition from the vegetative to the reproductive stage, and requires genetic and epigenetic reprogramming to ensure the success of seed production. Flowering is regulated by a complex network of genes that integrate multiple environmental cues and endogenous signals so that flowering occurs at the right time; hormone regulation, signaling and homeostasis are very important in this process. Working alone or in combination, hormones are able to promote flowering by epigenetic regulation. Some plant hormones, such as gibberellins, jasmonic acid, abscisic acid and auxins, have important effects on chromatin compaction mediated by DNA methylation and histone posttranslational modifications, which hints at the role that epigenetic regulation may play in flowering through hormone action. miRNAs have been viewed as acting independently from DNA methylation and histone modification, ignoring their potential to interact with hormone signaling - including the signaling of auxins, gibberellins, ethylene, jasmonic acid, salicylic acid and others - to regulate flowering. Therefore, in this review we examine new findings about interactions between epigenetic mechanisms and key players in hormone signaling to coordinate flowering.
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Affiliation(s)
| | | | | | - Rosa Us-Camas
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán, Mexico.
| | - Fátima Duarte-Aké
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán, Mexico.
| | - Clelia De-la-Peña
- Unidad de Biotecnología, Centro de Investigación Científica de Yucatán, Mexico.
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A putative 12-oxophytodienoate reductase gene CsOPR3 from Camellia sinensis, is involved in wound and herbivore infestation responses. Gene 2017; 615:18-24. [PMID: 28322995 DOI: 10.1016/j.gene.2017.03.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 03/08/2017] [Accepted: 03/15/2017] [Indexed: 11/22/2022]
Abstract
12-Oxophytodienoate reductase (OPR) is a key enzyme in the biosynthesis of jasmonic acid (JA), which plays an important role in plant defense responses. Although multiple isoforms of OPRs have been identified in various annual herbaceous plants, genes encoding these enzymes in perennial woody plants have yet to be fully investigated. In the tea plant, Camellia sinensis (L.), no OPR genes have been isolated, and their possible roles in tea plant development and defense mechanism remain unknown. In this study, a putative OPR gene, designated as CsOPR3, was isolated from tea plants for the first time through the rapid amplification of cDNA ends. The open reading frame of CsOPR3 is 1197bp in length, and encodes a protein of 398 amino acids. Real-time qPCR analysis revealed that CsOPR3 was expressed in different organs. In particular, CsOPR3 was highly expressed in flowers, leaves and stems but was weakly expressed in roots and seeds. CsOPR3 expression could be rapidly induced by mechanical wounding, and increased JA levels were correlated with the wound-induced CsOPR3 expression. The infestation of the tea geometrid (TG) Ectropis obliqua Prout, regurgitant derived from TG and exogenous JA application could enhance the CsOPR3 expression. Our study is the first to report that CsOPR3 plays an important role in JA biosynthesis and tea plant defense against herbivorous insects.
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86
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Huang H, Liu B, Liu L, Song S. Jasmonate action in plant growth and development. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:1349-1359. [PMID: 28158849 DOI: 10.1093/jxb/erw495] [Citation(s) in RCA: 310] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Phytohormones, including jasmonates (JAs), gibberellin, ethylene, abscisic acid, and auxin, integrate endogenous developmental cues with environmental signals to regulate plant growth, development, and defense. JAs are well- recognized lipid-derived stress hormones that regulate plant adaptations to biotic stresses, including herbivore attack and pathogen infection, as well as abiotic stresses, including wounding, ozone, and ultraviolet radiation. An increasing number of studies have shown that JAs also have functions in a remarkable number of plant developmental events, including primary root growth, reproductive development, and leaf senescence. Since the 1980s, details of the JA biosynthesis pathway, signaling pathway, and crosstalk during plant growth and development have been elucidated. Here, we summarize recent advances and give an updated overview of JA action and crosstalk in plant growth and development.
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Affiliation(s)
- Huang Huang
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, College of Life Sciences, Capital Normal University, Beijing 100048, China
- Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Bei Liu
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Liangyu Liu
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Susheng Song
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, College of Life Sciences, Capital Normal University, Beijing 100048, China
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87
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Carrizo García C, Nepi M, Pacini E. It is a matter of timing: asynchrony during pollen development and its consequences on pollen performance in angiosperms-a review. PROTOPLASMA 2017; 254:57-73. [PMID: 26872476 DOI: 10.1007/s00709-016-0950-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 01/26/2016] [Indexed: 05/20/2023]
Abstract
Functional pollen is needed to successfully complete fertilization. Pollen is formed inside the anthers following a specific sequence of developmental stages, from microsporocyte meiosis to pollen release, that concerns microsporocytes/microspores and anther wall tissues. The processes involved may not be synchronous within a flower, an anther, and even a microsporangium. Asynchrony has been barely analyzed, and its biological consequences have not been yet assessed. In this review, different processes of pollen development and lifetime, stressing on the possible consequences of their differential timing on pollen performance, are summarized. Development is usually synchronized until microsporocyte meiosis I (occasionally until meiosis II). Afterwards, a period of mostly asynchronous events extends up to anther opening as regards: (1) meiosis II (sometimes); (2) microspore vacuolization and later reduction of vacuoles; (3) amylogenesis, amylolysis, and carbohydrate inter-conversion; (4) the first haploid mitosis; and (5) intine formation. Asynchrony would promote metabolic differences among developing microspores and therefore physiologically heterogeneous pollen grains within a single microsporangium. Asynchrony would increase the effect of competition for resources during development and pollen tube growth and also for water during (re)hydration on the stigma. The differences generated by developmental asynchronies may have an adaptive role since more efficient pollen grains would be selected with regard to homeostasis, desiccation tolerance, resilience, speed of (re)hydration, and germination. The performance of each pollen grain which landed onto the stigma will be the result of a series of selective steps determined by its development, physiological state at maturity, and successive environmental constrains.
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Affiliation(s)
| | - Massimo Nepi
- Dipartimento di Scienze della Vita, Università degli Studi di Siena, Siena, Italy
| | - Ettore Pacini
- Dipartimento di Scienze della Vita, Università degli Studi di Siena, Siena, Italy
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88
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Pilar GJ, Olegario BR, Rafael RR. Occurrence of jasmonates during cystocarp development in the red alga Grateloupia imbricata. JOURNAL OF PHYCOLOGY 2016; 52:1085-1093. [PMID: 27643610 DOI: 10.1111/jpy.12467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 07/24/2016] [Indexed: 06/06/2023]
Abstract
In this study, we highlight the effects of methyl jasmonate (MeJa) on cystocarp development in the red macroscopic alga Grateloupia imbricata. In G. imbricata, jasmonate release is related to the reproductive state, as fertile thalli (i.e., those that have cystocarps) released significant amounts of this volatile compound (1.27 ± 0.20 mM · mg fw-1 · h-1 ) compared with infertile thalli (0.95 ± 0.12 mM · mg fw-1 · h-1 ). Treating G. imbricata thalli with MeJa revealed a significant increase in cystocarp number (1.5 ± 0.27 cystocarps · mm-2 ), which was ~7.5-fold greater than in untreated thalli (0.2 ± 0.07 cystocarps · mm-2 ). Maturation was completed within 48 h with MeJa treatment, a shortening of the typical >3-week maturation period, and included the opening of cystocarps and the presence of dehiscent cavities. Release rates of jasmonates after exogenous MeJa treatment were also modified based on the cystocarp maturation level. All of these effects were reduced in the presence of phenidone, which blocks MeJa production, indicating that the MeJa action is genuine. The effects of MeJa during cystocarp maturation were not replicated by derivatives of reactive oxygen species from the same jasmonic acid biosynthetic pathway, as the activities of scavenger enzymes and lipid peroxidation were unchanged between infertile and fertile thalli. Therefore, a reactive oxygen species-based mechanism is not involved during cystocarp development. We conclude that MeJa has an independent function as a growth regulator during G. imbricata reproduction.
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Affiliation(s)
- Garcia-Jimenez Pilar
- Departamento de Biología, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Canary Islands, Spain
| | - Brito-Romano Olegario
- Departamento de Biología, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Canary Islands, Spain
| | - Robaina R Rafael
- Departamento de Biología, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Canary Islands, Spain
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89
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Cao J, Li M, Chen J, Liu P, Li Z. Effects of MeJA on Arabidopsis metabolome under endogenous JA deficiency. Sci Rep 2016; 6:37674. [PMID: 27883040 PMCID: PMC5121592 DOI: 10.1038/srep37674] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 11/01/2016] [Indexed: 12/14/2022] Open
Abstract
Jasmonates (JAs) play important roles in plant growth, development and defense. Comprehensive metabolomics profiling of plants under JA treatment provides insights into the interaction and regulation network of plant hormones. Here we applied high resolution mass spectrometry based metabolomics approach on Arabidopsis wild type and JA synthesis deficiency mutant opr3. The effects of exogenous MeJA treatment on the metabolites of opr3 were investigated. More than 10000 ion signals were detected and more than 2000 signals showed significant variation in different genotypes and treatment groups. Multivariate statistic analyses (PCA and PLS-DA) were performed and a differential compound library containing 174 metabolites with high resolution precursor ion-product ions pairs was obtained. Classification and pathway analysis of 109 identified compounds in this library showed that glucosinolates and tryptophan metabolism, amino acids and small peptides metabolism, lipid metabolism, especially fatty acyls metabolism, were impacted by endogenous JA deficiency and exogenous MeJA treatment. These results were further verified by quantitative reverse transcription PCR (RT-qPCR) analysis of 21 related genes involved in the metabolism of glucosinolates, tryptophan and α-linolenic acid pathways. The results would greatly enhance our understanding of the biological functions of JA.
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Affiliation(s)
- Jingjing Cao
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Mengya Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Jian Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Pei Liu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Zhen Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
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90
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Fei J, Tan S, Zhang F, Hua L, Liao Y, Fang W, Chen F, Teng N. Morphological and physiological differences between dehiscent and indehiscent anthers of Chrysanthemum morifolium. JOURNAL OF PLANT RESEARCH 2016; 129:1069-1082. [PMID: 27491415 DOI: 10.1007/s10265-016-0854-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 06/23/2016] [Indexed: 06/06/2023]
Abstract
Spray cut chrysanthemums ornamental value and vase life are rapidly reduced with an increase in the pollen dispersal of the middle tubular bisexual flowers, and excessive pollen grains floating in the air are usually harmful to people. Thus, two cultivars were selected: the dehiscent 'Qx-097' and the indehiscent 'Qx-007', to investigate the morphological, structural and physiological differences in anthers. (1) Prior to the opening of the tubular flower, the anther was completely dehisced, and the pollen grains of 'Qx-097' were then released. 'Qx-007' inflorescences showed no pollen dispersal, and this cultivar was therefore not contaminated by its own pollen grains during flowering. (2) The anther cell structure of 'Qx-007' was abnormal, such that the entire anther wall exhibited hypertrophy due to the non-selective thickening of the endothecium cell size in different areas. Moreover, cracks did not form in the 'Qx-007' anther due to failure of septum degradation and stomium breakage, which resulted in the anther locules being inwardly crushed. Besides, the indehiscent anther accompanies partial pollen abortion due to the impairment of tapetum development, this is not conducive to pollen dispersal. (3) The 'Qx-007' anther contained higher water levels compared with 'Qx-097', and the dehydration of the 'Qx-007' anther was relatively moderate. Furthermore, the 'Qx-007' anther exhibited higher Ca2+ and Mg2+ levels compared with 'Qx-097' during dehiscing periods. (4) The 'Qx-007' anther showed significantly lower jasmonic acid levels and higher indole-3-acetic acid levels compare with the 'Qx-097' anther. These results suggest that the endothecium, septum and stomium constituent of the anther structure exhibit developmental abnormalities, which likely serve as the cellular basis of anther indehiscence. In addition, anther dehydration, the enhancement of anther cell toughness due to a high level of ions, and JA (IAA) dysregulation may be the determining physiological factors of anther indehiscence.
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Affiliation(s)
- Jiangsong Fei
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Sue Tan
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fengjiao Zhang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Lichun Hua
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuan Liao
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Weimin Fang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fadi Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Province Engineering Lab for Modern Facility Agriculture Technology & Equipment, Nanjing, 210095, China
| | - Nianjun Teng
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
- Jiangsu Province Engineering Lab for Modern Facility Agriculture Technology & Equipment, Nanjing, 210095, China.
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91
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Boex-Fontvieille E, Rustgi S, Von Wettstein D, Pollmann S, Reinbothe S, Reinbothe C. Jasmonic acid protects etiolated seedlings of Arabidopsis thaliana against herbivorous arthropods. PLANT SIGNALING & BEHAVIOR 2016; 11:e1214349. [PMID: 27485473 PMCID: PMC5022418 DOI: 10.1080/15592324.2016.1214349] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 07/05/2016] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
Seed predators can cause mass ingestion of larger seed populations. As well, herbivorous arthropods attempt to attack etiolated seedlings and chose the apical hook for ingestion, aimed at dropping the cotyledons for later consumption. Etiolated seedlings, as we show here, have established an efficient mechanism of protecting their Achilles' heel against these predators, however. Evidence is provided for a role of jasmonic acid (JA) in this largely uncharacterized plant-herbivore interaction during skotomorphogenesis and that this comprises the temporally and spatially tightly controlled synthesis of a cysteine protease inhibitors of the Kunitz family. Interestingly, the same Kunitz protease inhibitor was found to be expressed in flowers of Arabidopsis where endogenous JA levels are high for fertility. Because both the apical hook and inflorescences were preferred isopod targets in JA-deficient plants that could be rescued by exogenously administered JA, our data identify a JA-dependent mechanism of plant arthropod deterrence that is recalled in different organs and at quite different times of plant development.
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Affiliation(s)
- Edouard Boex-Fontvieille
- Laboratoire de Génétique Moléculaire des Plantes and Biologie Environnementale et Systémique (BEeSy), Université Grenoble-Alpes, Grenoble cedex, France
| | - Sachin Rustgi
- Department of Agricultural and Environmental Sciences, Pee Dee Research and Education Center, Clemson University, Florence, SC, USA
- Department of Crop and Soil Sciences, School of Molecular Biosciences, and Center for Reproductive Biology, Washington State University, Pullman, WA, USA
| | - Diter Von Wettstein
- Department of Crop and Soil Sciences, School of Molecular Biosciences, and Center for Reproductive Biology, Washington State University, Pullman, WA, USA
| | - Stephan Pollmann
- Centro de Biotecnología y Genómica de Plantas, Universidad Politecnica de Madrid (UPM)-Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain
| | - Steffen Reinbothe
- Laboratoire de Génétique Moléculaire des Plantes and Biologie Environnementale et Systémique (BEeSy), Université Grenoble-Alpes, Grenoble cedex, France
| | - Christiane Reinbothe
- Laboratoire de Génétique Moléculaire des Plantes and Biologie Environnementale et Systémique (BEeSy), Université Grenoble-Alpes, Grenoble cedex, France
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Qi J, Li J, Han X, Li R, Wu J, Yu H, Hu L, Xiao Y, Lu J, Lou Y. Jasmonic acid carboxyl methyltransferase regulates development and herbivory-induced defense response in rice. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2016; 58:564-76. [PMID: 26466818 DOI: 10.1111/jipb.12436] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 10/12/2015] [Indexed: 05/03/2023]
Abstract
Jasmonic acid (JA) and related metabolites play a key role in plant defense and growth. JA carboxyl methyltransferase (JMT) may be involved in plant defense and development by methylating JA to methyl jasmonate (MeJA) and thus influencing the concentrations of JA and related metabolites. However, no JMT gene has been well characterized in monocotyledon defense and development at the molecular level. After we cloned a rice JMT gene, OsJMT1, whose encoding protein was localized in the cytosol, we found that the recombinant OsJMT1 protein catalyzed JA to MeJA. OsJMT1 is up-regulated in response to infestation with the brown planthopper (BPH; Nilaparvata lugens). Plants in which OsJMT1 had been overexpressed (oe-JMT plants) showed reduced height and yield. These oe-JMT plants also exhibited increased MeJA levels but reduced levels of herbivore-induced JA and jasmonoyl-isoleucine (JA-Ile). The oe-JMT plants were more attractive to BPH female adults but showed increased resistance to BPH nymphs, probably owing to the different responses of BPH female adults and nymphs to the changes in levels of H2 O2 and MeJA in oe-JMT plants. These results indicate that OsJMT1, by altering levels of JA and related metabolites, plays a role in regulating plant development and herbivore-induced defense responses in rice.
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Affiliation(s)
- Jinfeng Qi
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Jiancai Li
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Xiu Han
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Ran Li
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Jianqiang Wu
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Haixin Yu
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Lingfei Hu
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Yutao Xiao
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Jing Lu
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Yonggen Lou
- State Key Laboratory of Rice Biology, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
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93
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Kelly AA, Feussner I. Oil is on the agenda: Lipid turnover in higher plants. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:1253-1268. [PMID: 27155216 DOI: 10.1016/j.bbalip.2016.04.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 04/23/2016] [Accepted: 04/25/2016] [Indexed: 12/13/2022]
Abstract
Lipases hydrolyze ester bonds within lipids. This process is called lipolysis. They are key players in lipid turnover and involved in numerous metabolic pathways, many of which are shared between organisms like the mobilization of neutral or storage lipids or lipase-mediated membrane lipid homeostasis. Some reactions though are predominantly present in certain organisms, such as the production of signaling molecules (endocannabinoids) by diacylglycerol (DAG) and monoacylglycerol (MAG) lipases in mammals and plants or the jasmonate production in flowering plants. This review aims at giving an overview of the different functional classes of lipases and respective well-known activities, with a focus on the most recent findings in plant biology for selected classes. Here we will put an emphasis on the physiological role and contribution of lipases to the turnover of neutral lipids found in seed oil and other vegetative tissue as candidates for increasing the economical values of crop plants. This article is part of a Special Issue entitled: Plant Lipid Biology edited by Kent D. Chapman and Ivo Feussner.
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Affiliation(s)
- Amélie A Kelly
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Justus-von-Liebig Weg 11, 37077 Göttingen, Germany
| | - Ivo Feussner
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Justus-von-Liebig Weg 11, 37077 Göttingen, Germany; Georg-August-University, Göttingen Center for Molecular Biosciences (GZMB), Justus-von-Liebig Weg 11, 37077 Göttingen, Germany; Georg-August-University, International Center for Advanced Studies of Energy Conversion (ICASEC), Justus-von-Liebig Weg 11, 37077 Göttingen, Germany
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94
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Zheng H, Pan X, Deng Y, Wu H, Liu P, Li X. AtOPR3 specifically inhibits primary root growth in Arabidopsis under phosphate deficiency. Sci Rep 2016; 6:24778. [PMID: 27101793 PMCID: PMC4840450 DOI: 10.1038/srep24778] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 04/04/2016] [Indexed: 11/30/2022] Open
Abstract
The primary root plays essential roles in root development, nutrient absorption, and root architectural establishment. Primary root growth is generally suppressed by phosphate (P) deficiency in A. thaliana; however, the underlying molecular mechanisms are largely elusive to date. We found that AtOPR3 specifically inhibited primary root growth under P deficiency via suppressing root tip growth at the transcriptional level, revealing an important novel function of AtOPR3 in regulating primary root response to the nutrient stress. Importantly, AtOPR3 functioned to down-regulate primary root growth under P limitation mostly by its own, rather than depending on the Jasmonic acid signaling pathway. Further, AtOPR3 interacted with ethylene and gibberellin signaling pathways to regulate primary root growth upon P deficiency. In addition, the AtOPR3's function in inhibiting primary root growth upon P limitation was also partially dependent on auxin polar transport. Together, our studies provide new insights into how AtOPR3, together with hormone signaling interactions, modulates primary root growth in coping with the environmental stress in Arabidopsis.
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Affiliation(s)
- Hongyan Zheng
- Department of Plant Nutrition, China Agricultural University, Beijing, 100193, China
| | - Xiaoying Pan
- Department of Plant Nutrition, China Agricultural University, Beijing, 100193, China
| | - Yuxia Deng
- Department of Plant Nutrition, China Agricultural University, Beijing, 100193, China
| | - Huamao Wu
- Department of Plant Nutrition, China Agricultural University, Beijing, 100193, China
| | - Pei Liu
- Department of Ecology, China Agricultural University, Beijing, 100193, China
| | - Xuexian Li
- Department of Plant Nutrition, China Agricultural University, Beijing, 100193, China
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95
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Jewell JB, Browse J. Epidermal jasmonate perception is sufficient for all aspects of jasmonate-mediated male fertility in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 85:634-47. [PMID: 26833563 DOI: 10.1111/tpj.13131] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 01/15/2016] [Accepted: 01/20/2016] [Indexed: 05/26/2023]
Abstract
Jasmonate (JA) signaling is essential for several environmental responses and reproductive development in many plant species. In Arabidopsis thaliana, the most obvious phenotype of JA biosynthetic and perception mutants is profound sporophytic male sterility characterized by failure of stamen filament elongation, severe delay of anther dehiscence and pollen inviability. The site of action of JA in the context of reproductive development has been discussed, but the ideas have not been tested experimentally. To this end we used targeted expression of a COI1-YFP transgene in the coi1-1 mutant background. As COI1 is an essential component of the JA co-receptor complex, the null coi1-1 mutant is male sterile due to lack of JA perception. We show that expression of COI1-YFP in the epidermis of the stamen filament and anther in coi1 mutant plants is sufficient to rescue filament elongation, anther dehiscence and pollen viability. In contrast, filament expression alone or expression in the tapetum do not restore dehiscence and pollen viability. These results demonstrate that epidermal JA perception is sufficient for anther function and pollen viability, and suggest the presence of a JA-dependent non-autonomous signal produced in the anther epidermis to synchronize both anther dehiscence and pollen maturation.
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Affiliation(s)
- Jeremy B Jewell
- Institute of Biological Chemistry, Washington State University, Pullman, WA, 99164-6340, USA
| | - John Browse
- Institute of Biological Chemistry, Washington State University, Pullman, WA, 99164-6340, USA
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96
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Zhu M, Shabala L, Cuin TA, Huang X, Zhou M, Munns R, Shabala S. Nax loci affect SOS1-like Na+/H+ exchanger expression and activity in wheat. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:835-44. [PMID: 26585227 PMCID: PMC4737075 DOI: 10.1093/jxb/erv493] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Salinity stress tolerance in durum wheat is strongly associated with a plant's ability to control Na(+) delivery to the shoot. Two loci, termed Nax1 and Nax2, were recently identified as being critical for this process and the sodium transporters HKT1;4 and HKT1;5 were identified as the respective candidate genes. These transporters retrieve Na(+) from the xylem, thus limiting the rates of Na(+) transport from the root to the shoot. In this work, we show that the Nax loci also affect activity and expression levels of the SOS1-like Na(+)/H(+) exchanger in both root cortical and stelar tissues. Net Na(+) efflux measured in isolated steles from salt-treated plants, using the non-invasive ion flux measuring MIFE technique, decreased in the sequence: Tamaroi (parental line)>Nax1=Nax2>Nax1:Nax2 lines. This efflux was sensitive to amiloride (a known inhibitor of the Na(+)/H(+) exchanger) and was mirrored by net H(+) flux changes. TdSOS1 relative transcript levels were 6-10-fold lower in Nax lines compared with Tamaroi. Thus, it appears that Nax loci confer two highly complementary mechanisms, both of which contribute towards reducing the xylem Na(+) content. One enhances the retrieval of Na(+) back into the root stele via HKT1;4 or HKT1;5, whilst the other reduces the rate of Na(+) loading into the xylem via SOS1. It is suggested that such duality plays an important adaptive role with greater versatility for responding to a changing environment and controlling Na(+) delivery to the shoot.
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Affiliation(s)
- Min Zhu
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas 7001, Australia
| | - Lana Shabala
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas 7001, Australia
| | - Tracey A Cuin
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas 7001, Australia Institute for Molecular Plant Physiology and Biophysics, Julius-von-Sachs Platz 2, D-97082 Würzburg, Germany
| | - Xin Huang
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas 7001, Australia
| | - Meixue Zhou
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas 7001, Australia
| | - Rana Munns
- School of Plant Biology and ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, Crawley WA 6009, Australia CSIRO Agriculture, Canberra, ACT 2601, Australia
| | - Sergey Shabala
- School of Land and Food and Tasmanian Institute for Agriculture, University of Tasmania, Private Bag 54, Hobart, Tas 7001, Australia
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97
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Meristem maintenance, auxin, jasmonic and abscisic acid pathways as a mechanism for phenotypic plasticity in Antirrhinum majus. Sci Rep 2016; 6:19807. [PMID: 26804132 PMCID: PMC4726321 DOI: 10.1038/srep19807] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 12/14/2015] [Indexed: 12/31/2022] Open
Abstract
Plants grow under climatic changing conditions that cause modifications in vegetative and reproductive development. The degree of changes in organ development i.e. its phenotypic plasticity seems to be determined by the organ identity and the type of environmental cue. We used intraspecific competition and found that Antirrhinum majus behaves as a decoupled species for lateral organ size and number. Crowding causes decreases in leaf size and increased leaf number whereas floral size is robust and floral number is reduced. Genes involved in shoot apical meristem maintenance like ROA and HIRZ, cell cycle (CYCD3a; CYCD3b, HISTONE H4) or organ polarity (GRAM) were not significantly downregulated under crowding conditions. A transcriptomic analysis of inflorescence meristems showed Gene Ontology enriched pathways upregulated including Jasmonic and Abscisic acid synthesis and or signalling. Genes involved in auxin synthesis such as AmTAR2 and signalling AmANT were not affected by crowding. In contrast, AmJAZ1, AmMYB21, AmOPCL1 and AmABA2 were significantly upregulated. Our work provides a mechanistic working hypothesis where a robust SAM and stable auxin signalling enables a homogeneous floral size while changes in JA and ABA signalling maybe responsible for the decreased leaf size and floral number.
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98
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Wang Y, Yuan G, Yuan S, Duan W, Wang P, Bai J, Zhang F, Gao S, Zhang L, Zhao C. TaOPR2 encodes a 12-oxo-phytodienoic acid reductase involved in the biosynthesis of jasmonic acid in wheat (Triticum aestivum L.). Biochem Biophys Res Commun 2016; 470:233-238. [PMID: 26778003 DOI: 10.1016/j.bbrc.2016.01.043] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 01/07/2016] [Indexed: 02/07/2023]
Abstract
The 12-oxo-phytodienoic acid reductases (OPRs) are involved in the various processes of growth and development in plants, and classified into the OPRⅠ and OPRⅡ subgroups. In higher plants, only OPRⅡ subgroup genes take part in the biosynthesis of endogenous jasmonic acid. In this study, we isolated a novel OPRⅡ subgroup gene named TaOPR2 (GeneBank accession: KM216389) from the thermo-sensitive genic male sterile (TGMS) wheat cultivar BS366. TaOPR2 was predicted to encode a protein with 390 amino acids. The encoded protein contained the typical oxidored_FMN domain, the C-terminus peroxisomal-targeting signal peptide, and conserved FMN-binding sites. TaOPR2 was mapped to wheat chromosome 7B and located on peroxisome. Protein evolution analysis revealed that TaOPR2 belongs to the OPRⅡ subgroup and shares a high degree of identity with other higher plant OPR proteins. The quantitative real-time PCR results indicated that the expression of TaOPR2 is inhibited by abscisic acid (ABA), salicylic acid (SA), gibberellic acid (GA3), low temperatures and high salinity. In contrast, the expression of TaOPR2 can be induced by wounding, drought and methyl jasmonate (MeJA). Furthermore, the transcription level of TaOPR2 increased after infection with Puccinia striiformis f. sp. tritici and Puccinia recondite f. sp. tritici. TaOPR2 has NADPH-dependent oxidoreductase activity. In addition, the constitutive expression of TaOPR2 can rescue the male sterility phenotype of Arabidopsis mutant opr3. These results suggest that TaOPR2 is involved in the biosynthesis of jasmonic acid (JA) in wheat.
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Affiliation(s)
- Yukun Wang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China
| | - Guoliang Yuan
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China
| | - Shaohua Yuan
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China
| | - Wenjing Duan
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China; College of Life Sciences, Capital Normal University, Beijing 100048, China
| | - Peng Wang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China; College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Jianfang Bai
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China
| | - Fengting Zhang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China
| | - Shiqing Gao
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China
| | - Liping Zhang
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China.
| | - Changping Zhao
- Beijing Engineering and Technique Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; The Municipal Key Laboratory of the Molecular Genetics of Hybrid Wheat, Beijing 100097, China
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99
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Widemann E, Smirnova E, Aubert Y, Miesch L, Heitz T. Dynamics of Jasmonate Metabolism upon Flowering and across Leaf Stress Responses in Arabidopsis thaliana. PLANTS 2016; 5:plants5010004. [PMID: 27135224 PMCID: PMC4844418 DOI: 10.3390/plants5010004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 12/22/2015] [Accepted: 12/28/2015] [Indexed: 11/16/2022]
Abstract
The jasmonic acid (JA) signaling pathway plays important roles in adaptation of plants to environmental cues and in specific steps of their development, particularly in reproduction. Recent advances in metabolic studies have highlighted intricate mechanisms that govern enzymatic conversions within the jasmonate family. Here we analyzed jasmonate profile changes upon Arabidopsis thaliana flower development and investigated the contribution of catabolic pathways that were known to turnover the active hormonal compound jasmonoyl-isoleucine (JA-Ile) upon leaf stress. We report a rapid decline of JA-Ile upon flower opening, concomitant with the massive accumulation of its most oxidized catabolite, 12COOH-JA-Ile. Detailed genetic analysis identified CYP94C1 as the major player in this process. CYP94C1 is one out of three characterized cytochrome P450 enzymes that define an oxidative JA-Ile turnover pathway, besides a second, hydrolytic pathway represented by the amido-hydrolases IAR3 and ILL6. Expression studies combined with reporter gene analysis revealed the dominant expression of CYP94C1 in mature anthers, consistent with the established role of JA signaling in male fertility. Significant CYP94B1 expression was also evidenced in stamen filaments, but surprisingly, CYP94B1 deficiency was not associated with significant changes in JA profiles. Finally, we compared global flower JA profiles with those previously reported in leaves reacting to mechanical wounding or submitted to infection by the necrotrophic fungus Botrytis cinerea. These comparisons revealed distinct dynamics of JA accumulation and conversions in these three biological systems. Leaf injury boosts a strong and transient JA and JA-Ile accumulation that evolves rapidly into a profile dominated by ω-oxidized and/or Ile-conjugated derivatives. In contrast, B. cinerea-infected leaves contain mostly unconjugated jasmonates, about half of this content being ω-oxidized. Finally, developing flowers present an intermediate situation where young flower buds show detectable jasmonate oxidation (probably originating from stamen metabolism) which becomes exacerbated upon flower opening. Our data illustrate that in spite conserved enzymatic routes, the jasmonate metabolic grid shows considerable flexibility and dynamically equilibrates into specific blends in different physiological situations.
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Affiliation(s)
- Emilie Widemann
- Institut de Biologie Moléculaire des Plantes, CNRS-UPR2357, associée à l'Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg Cedex, France.
| | - Ekaterina Smirnova
- Institut de Biologie Moléculaire des Plantes, CNRS-UPR2357, associée à l'Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg Cedex, France.
| | - Yann Aubert
- Institut de Biologie Moléculaire des Plantes, CNRS-UPR2357, associée à l'Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg Cedex, France.
| | - Laurence Miesch
- Laboratoire de Chimie Organique Synthétique, Unité Mixte de Recherche 7177, Université de Strasbourg, 67008 Strasbourg Cedex, France.
| | - Thierry Heitz
- Institut de Biologie Moléculaire des Plantes, CNRS-UPR2357, associée à l'Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg Cedex, France.
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100
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Xu X, Ji J, Ma X, Xu Q, Qi X, Chen X. Comparative Proteomic Analysis Provides Insight into the Key Proteins Involved in Cucumber ( Cucumis sativus L.) Adventitious Root Emergence under Waterlogging Stress. FRONTIERS IN PLANT SCIENCE 2016; 7:1515. [PMID: 27790230 PMCID: PMC5062059 DOI: 10.3389/fpls.2016.01515] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 09/26/2016] [Indexed: 05/20/2023]
Abstract
Waterlogging is a common abiotic stress in both natural and agricultural systems, and it primarily affects plant growth by the slow oxygen diffusion in water. To sustain root function in the hypoxic environment, a key adaptation for waterlogging tolerant plants is the formation of adventitious roots (ARs). We found that cucumber waterlogging tolerant line Zaoer-N seedlings adapt to waterlogging stress by developing a larger number of ARs in hypocotyls, while almost no AR is generated in sensitive line Pepino. To understand the molecular mechanisms underlying AR emergence, the iTRAQ-based quantitative proteomics approach was employed to map the proteomes of hypocotyls cells of the Zaoer-N and Pepino under control and waterlogging conditions. A total of 5508 proteins were identified and 146 were differentially regulated proteins (DRPs), of which 47 and 56 DRPs were specific to tolerant and sensitive line, respectively. In the waterlogged Zaoer-N hypocotyls, DRPs related to alcohol dehydrogenases (ADH), 1-aminocyclopropane-1-carboxylicacid oxidases, peroxidases, 60S ribosomal proteins, GSDL esterases/lipases, histone deacetylases, and histone H5 and were strongly overrepresented to manage the energy crisis, promote ethylene release, minimize oxidative damage, mobilize storage lipids, and stimulate cell division, differentiation and growth. The evaluations of ethylene production, ADH activity, pyruvate decarboxylase (PDC) activity and ethanol production were in good agreement with the proteomic results. qRT-PCR analysis of the corresponding 146 genes further confirmed the accuracy of the observed protein abundance. These findings shed light on the mechanisms underlying waterlogging triggered cucumber ARs emergence, and provided valuable information for the breeding of cucumber with enhanced tolerance to waterlogging.
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