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Fu ZW, Ding F, Zhang BL, Liu WC, Huang ZH, Fan SH, Feng YR, Lu YT, Hua W. Hydrogen peroxide sulfenylates and inhibits the photorespiratory enzyme PGLP1 to modulate plant thermotolerance. PLANT COMMUNICATIONS 2024; 5:100852. [PMID: 38409783 PMCID: PMC11211548 DOI: 10.1016/j.xplc.2024.100852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 01/18/2024] [Accepted: 02/22/2024] [Indexed: 02/28/2024]
Abstract
Climate change is resulting in more frequent and rapidly changing temperatures at both extremes that severely affect the growth and production of plants, particularly crops. Oxidative stress caused by high temperatures is one of the most damaging factors for plants. However, the role of hydrogen peroxide (H2O2) in modulating plant thermotolerance is largely unknown, and the regulation of photorespiration essential for C3 species remains to be fully clarified. Here, we report that heat stress promotes H2O2 accumulation in chloroplasts and that H2O2 stimulates sulfenylation of the chloroplast-localized photorespiratory enzyme 2-phosphoglycolate phosphatase 1 (PGLP1) at cysteine 86, inhibiting its activity and promoting the accumulation of the toxic metabolite 2-phosphoglycolate. We also demonstrate that PGLP1 has a positive function in plant thermotolerance, as PGLP1 antisense lines have greater heat sensitivity and PGLP1-overexpressing plants have higher heat-stress tolerance than the wild type. Together, our results demonstrate that heat-induced H2O2 in chloroplasts sulfenylates and inhibits PGLP1 to modulate plant thermotolerance. Furthermore, targeting CATALASE2 to chloroplasts can largely prevent the heat-induced overaccumulation of H2O2 and the sulfenylation of PGLP1, thus conferring thermotolerance without a plant growth penalty. These findings reveal that heat-induced H2O2 in chloroplasts is important for heat-caused plant damage.
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Affiliation(s)
- Zheng-Wei Fu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Feng Ding
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Bing-Lei Zhang
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan 056038, China
| | - Wen-Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Zi-Hong Huang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Shi-Hang Fan
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Yu-Rui Feng
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Ying-Tang Lu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China.
| | - Wei Hua
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China; Hubei Hongshan Laboratory, Wuhan 430070, China.
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2
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Wang P, Liu WC, Han C, Wang S, Bai MY, Song CP. Reactive oxygen species: Multidimensional regulators of plant adaptation to abiotic stress and development. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024; 66:330-367. [PMID: 38116735 DOI: 10.1111/jipb.13601] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/18/2023] [Indexed: 12/21/2023]
Abstract
Reactive oxygen species (ROS) are produced as undesirable by-products of metabolism in various cellular compartments, especially in response to unfavorable environmental conditions, throughout the life cycle of plants. Stress-induced ROS production disrupts normal cellular function and leads to oxidative damage. To cope with excessive ROS, plants are equipped with a sophisticated antioxidative defense system consisting of enzymatic and non-enzymatic components that scavenge ROS or inhibit their harmful effects on biomolecules. Nonetheless, when maintained at relatively low levels, ROS act as signaling molecules that regulate plant growth, development, and adaptation to adverse conditions. Here, we provide an overview of current approaches for detecting ROS. We also discuss recent advances in understanding ROS signaling, ROS metabolism, and the roles of ROS in plant growth and responses to various abiotic stresses.
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Affiliation(s)
- Pengtao Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Wen-Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Chao Han
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Situ Wang
- Faculty of Science, McGill University, Montreal, H3B1X8, Canada
| | - Ming-Yi Bai
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Chun-Peng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
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3
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Fu ZW, Feng YR, Gao X, Ding F, Li JH, Yuan TT, Lu YT. Salt stress-induced chloroplastic hydrogen peroxide stimulates pdTPI sulfenylation and methylglyoxal accumulation. THE PLANT CELL 2023; 35:1593-1616. [PMID: 36695476 PMCID: PMC10118271 DOI: 10.1093/plcell/koad019] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/24/2023] [Indexed: 06/17/2023]
Abstract
High salinity, an adverse environmental factor affecting about 20% of irrigated arable land worldwide, inhibits plant growth and development by causing oxidative stress, damaging cellular components, and disturbing global metabolism. However, whether and how reactive oxygen species disturb the metabolism of salt-stressed plants remain elusive. Here, we report that salt-induced hydrogen peroxide (H2O2) inhibits the activity of plastid triose phosphate isomerase (pdTPI) to promote methylglyoxal (MG) accumulation and stimulates the sulfenylation of pdTPI at cysteine 74. We also show that MG is a key factor limiting the plant growth, as a decrease in MG levels completely rescued the stunted growth and repressed salt stress tolerance of the pdtpi mutant. Furthermore, targeting CATALASE 2 into chloroplasts to prevent salt-induced overaccumulation of H2O2 conferred salt stress tolerance, revealing a role for chloroplastic H2O2 in salt-caused plant damage. In addition, we demonstrate that the H2O2-mediated accumulation of MG in turn induces H2O2 production, thus forming a regulatory loop that further inhibits the pdTPI activity in salt-stressed plants. Our findings, therefore, illustrate how salt stress induces MG production to inhibit the plant growth.
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Affiliation(s)
- Zheng-Wei Fu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Yu-Rui Feng
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Xiang Gao
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Feng Ding
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Jian-Hui Li
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Ting-Ting Yuan
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Ying-Tang Lu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
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4
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Xiang F, Liu WC, Liu X, Song Y, Zhang Y, Zhu X, Wang P, Guo S, Song CP. Direct balancing of lipid mobilization and reactive oxygen species production by the epoxidation of fatty acid catalyzed by a cytochrome P450 protein during seed germination. THE NEW PHYTOLOGIST 2023; 237:2104-2117. [PMID: 36495066 DOI: 10.1111/nph.18669] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Fatty acid (FA) β-oxidation provides energy for oil seed germination but also produces massive byproduct reactive oxygen species (ROS), posing potential oxidative damage to plant cells. How plants overcome the contradiction between energy supply and ROS production during seed germination remains unclear. In this study, we identified an Arabidopsis mvs1 (methylviologen-sensitive) mutant that was hypersensitive to ROS and caused by a missense mutation (G1349 substituted as A) of a cytochrome P450 gene, CYP77A4. CYP77A4 was highly expressed in germinating seedling cotyledons, and its protein is localized in the endoplasmic reticulum. As CYP77A4 catalyzes the epoxidation of unsaturated FA, disruption of CYP77A4 resulted in increased unsaturated FA abundance and over accumulated ROS in the mvs1 mutant. Consistently, scavenging excess ROS or blocking FA β-oxidation could repress the ROS overaccumulation and hypersensitivity in the mvs1 mutant. Furthermore, H2 O2 transcriptionally upregulated CYP77A4 expression and post-translationally modified CYP77A4 by sulfenylating its Cysteine-456, which is necessary for CYP77A4's role in modulating FA abundance and ROS production. Together, our study illustrates that CYP77A4 mediates direct balancing of lipid mobilization and ROS production by the epoxidation of FA during seed germination.
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Affiliation(s)
- Fuyou Xiang
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
| | - Wen-Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
| | - Xin Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
| | - Yuwei Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
- College of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Yu Zhang
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
| | - Xiaojing Zhu
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
| | - Pengtao Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
| | - Siyi Guo
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
| | - Chun-Peng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of Life Sciences, College of Agriculture, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, Henan, 475004, China
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5
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Tarkowski ŁP, Signorelli S, Considine MJ, Montrichard F. Integration of reactive oxygen species and nutrient signalling to shape root system architecture. PLANT, CELL & ENVIRONMENT 2023; 46:379-390. [PMID: 36479711 PMCID: PMC10107350 DOI: 10.1111/pce.14504] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 11/30/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Yield losses due to nutrient deficiency are estimated as the primary cause of the yield gap worldwide. Understanding how plant roots perceive external nutrient status and elaborate morphological adaptations in response to it is necessary to develop reliable strategies to increase crop yield. In the last decade, reactive oxygen species (ROS) were shown to be key players of the mechanisms underlying root responses to nutrient limitation. ROS contribute in multiple ways to shape the root system in response to nutritional cues, both as direct effectors acting on cell wall architecture and as second messengers in signalling pathways. Here, we review the mutual interconnections existing between perception and signalling of the most common forms of the major macronutrients (nitrogen, phosphorus and potassium), and ROS in shaping plant root system architecture. We discuss recent advances in dissecting the integration of these elements and their impact on morphological traits of the root system, highlighting the functional ductility of ROS and enzymes implied in ROS metabolism, such as class III peroxidases.
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Affiliation(s)
| | - Santiago Signorelli
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular SciencesUniversity of Western AustraliaPerthWestern AustraliaAustralia
- Food and Plant Biology group, Departamento de Biología Vegetal, Facultad de AgronomíaUniversidad de la RepúblicaMontevideoUruguay
| | - Michael J. Considine
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular SciencesUniversity of Western AustraliaPerthWestern AustraliaAustralia
- Department of Primary Industries and Regional DevelopmentPerthWestern AustraliaAustralia
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Li X, Meng H, Liu L, Hong C, Zhang C. Metabolic network changes during skotomorphogenesis in Arabidopsis thaliana mutant ( atdfb-3). PLANT DIRECT 2022; 6:e00467. [PMID: 36438611 PMCID: PMC9684686 DOI: 10.1002/pld3.467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 11/01/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
The metabolic networks underlying skotomorphogenesis in seedlings remain relatively unknown. On the basis of our previous study on the folate metabolism in seedlings grown in darkness, the plastidial folylpolyglutamate synthetase gene (AtDFB) T-DNA insertion Arabidopsis thaliana mutant (atdfb-3) was examined. Under the nitrate-sufficient condition, the mutant exhibited deficient folate metabolism and hypocotyl elongation, which affected skotomorphogenesis. Further analyses revealed changes to multiple intermediate metabolites related to carbon and nitrogen metabolism in the etiolated atdfb-3 seedlings. Specifically, the sugar, polyol, and fatty acid contents decreased in the atdfb-3 mutant under the nitrate-sufficient condition, whereas the abundance of various organic acids and amino acids increased. In response to nitrate-limited stress, multiple metabolites, including sugars, polyols, fatty acids, organic acids, and amino acids, accumulated more in the mutant than in the wild-type control. The differences in the contents of multiple metabolites between the atdfb-3 and wild-type seedlings decreased following the addition of exogenous 5-F-THF under both nitrogen conditions. Additionally, the mutant accumulated high levels of one-carbon metabolites, such as Cys, S-adenosylmethionine, and S-adenosylhomocysteine, under both nitrogen conditions. Thus, our data demonstrated that the perturbed folate metabolism in the atdfb-3 seedlings, which was caused by the loss-of-function mutation to AtDFB, probably altered carbon and nitrogen metabolism, thereby modulating skotomorphogenesis. Furthermore, the study findings provide new evidence of the links among folate metabolism, metabolic networks, and skotomorphogenesis.
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Affiliation(s)
- Xingjuan Li
- College of BioengineeringBeijing PolytechnicBeijingChina
| | - Hongyan Meng
- Fujian Provincial Key Laboratory of Subtropical Plant Physiology and BiochemistryFujian Institute of Subtropical BotanyXiamenChina
| | - Liqing Liu
- Fujian Provincial Key Laboratory of Subtropical Plant Physiology and BiochemistryFujian Institute of Subtropical BotanyXiamenChina
| | - Cuiyun Hong
- Fujian Provincial Key Laboratory of Subtropical Plant Physiology and BiochemistryFujian Institute of Subtropical BotanyXiamenChina
| | - Chunyi Zhang
- Biotechnology Research InstituteChinese Academy of Agricultural SciencesBeijingChina
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7
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Sulfenylation of ENOLASE2 facilitates H 2O 2-conferred freezing tolerance in Arabidopsis. Dev Cell 2022; 57:1883-1898.e5. [PMID: 35809562 DOI: 10.1016/j.devcel.2022.06.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/23/2022] [Accepted: 06/15/2022] [Indexed: 11/24/2022]
Abstract
H2O2 affects the expression of genes that are involved in plant responses to diverse environmental stresses; however, the underlying mechanisms remain elusive. Here, we demonstrate that H2O2 enhances plant freezing tolerance through its effect on a protein product of low expression of osmotically responsive genes2 (LOS2). LOS2 is translated into a major product, cytosolic enolase2 (ENO2), and sometimes an alternative product, the transcription repressor c-Myc-binding protein (MBP-1). ENO2, but not MBP-1, promotes cold tolerance by binding the promoter of C-repeat/DRE binding factor1 (CBF1), a central transcription factor in plant cold signaling, thus activating its expression. Overexpression of CBF1 restores freezing sensitivity of a LOS2 loss-of-function mutant. Furthermore, cold-induced H2O2 increases nuclear import and transcriptional binding activity of ENO2 by sulfenylating cysteine 408 and thereby promotes its oligomerization. Collectively, our results illustrate how H2O2 activates plant cold responses by sulfenylating ENO2 and promoting its oligomerization, leading to enhanced nuclear translocation and transcriptional activation of CBF1.
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Wang P, Yan Y, Bai Y, Dong Y, Wei Y, Zeng H, Shi H. Phosphorylation of RAV1/2 by KIN10 is essential for transcriptional activation of CAT6/7, which underlies oxidative stress response in cassava. Cell Rep 2021; 37:110119. [PMID: 34910906 DOI: 10.1016/j.celrep.2021.110119] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/11/2021] [Accepted: 11/18/2021] [Indexed: 01/17/2023] Open
Abstract
Related to ABI3/VP1 (RAV) transcription factors have important roles in plant stress responses; however, it is unclear whether RAVs regulates oxidative stress response in cassava (Manihot esculenta). In this study, we report that MeRAV1/2 positively regulate oxidative stress resistance and catalase (CAT) activity in cassava. Consistently, RNA sequencing (RNA-seq) identifies three MeCATs that are differentially expressed in MeRAV1/2-silenced cassava leaves. Interestingly, MeCAT6 and MeCAT7 are identified as direct transcriptional targets of MeRAV1/2 via binding to their promoters. In addition, protein kinase MeKIN10 directly interacts with MeRAV1/2 to phosphorylate them at Ser45 and Ser44 residues, respectively, to promote their direct transcriptional activation on MeCAT6 and MeCAT7. Site mutation of MeRAV1S45A or MeRAV2S44A has no significant effect on the activities of MeCAT6 and MeCAT7 promoters or on oxidative stress resistance. In summary, this study demonstrates that the phosphorylation of MeRAV1/2 by MeKIN10 is essential for its direct transcriptional activation of MeCAT6/7 in response to oxidative stress.
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Affiliation(s)
- Peng Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China
| | - Yu Yan
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China
| | - Yujing Bai
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China
| | - Yabin Dong
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China
| | - Hongqiu Zeng
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China.
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9
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Zhang Y, Song R, Yuan H, Li T, Wang L, Lu K, Guo J, Liu W. Overexpressing the N-terminus of CATALASE2 enhances plant jasmonic acid biosynthesis and resistance to necrotrophic pathogen Botrytis cinerea B05.10. MOLECULAR PLANT PATHOLOGY 2021; 22:1226-1238. [PMID: 34247446 PMCID: PMC8435237 DOI: 10.1111/mpp.13106] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 06/16/2021] [Accepted: 06/16/2021] [Indexed: 05/31/2023]
Abstract
Salicylic acid (SA) acts antagonistically to jasmonic acid (JA) in plant immunity. We previously reported that CATALASE2 (CAT2) promotes JA-biosynthetic acyl-CoA oxidase (ACX) activity to enhance plant resistance to necrotrophic Botrytis cinerea, and SA represses JA biosynthesis through inhibiting CAT2 activity, while the underlying mechanism remains to be further elucidated. Here, we report that the truncated CAT2 N-terminus (CAT2-N) interacts with and promotes ACX2/3, and CAT2-N-overexpressing plants have increased JA accumulation and enhanced resistance to B. cinerea B05.10, but compromised antagonism of SA on JA. Catalase inhibitor treatment or mutating CAT2 active amino acids abolished CAT2 H2 O2 -decomposing activity but did not affect its promotion of ACX2/3 activity via interaction. CAT2-N, a truncated protein with no catalase activity, interacted with and promoted ACX2/3. Overexpressing CAT2-N in Arabidopsis plants resulted in increased ACX activity, higher JA accumulation, and stronger resistance to B. cinerea B05.10 infection. Additionally, SA dramatically repressed JA biosynthesis and resistance to B. cinerea in the wild type but not in the CAT2-N-overexpressing plants. Together, our study reveals that CAT2-N can be utilized as an accelerator for JA biosynthesis during plant resistance to B. cinerea B05.10, and this truncated protein partly relieves SA repression of JA biosynthesis in plant defence responses.
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Affiliation(s)
- Yu Zhang
- State Key Laboratory of Crop Stress Adaptation and ImprovementSchool of Life SciencesHenan UniversityKaifengChina
| | - Ru‐Feng Song
- State Key Laboratory of Crop Stress Adaptation and ImprovementSchool of Life SciencesHenan UniversityKaifengChina
| | - Hong‐Mei Yuan
- Hainan Key Laboratory for Sustainable Utilization of Tropical BioresourcesCollege of Tropical CropsHainan UniversityHaikouChina
| | - Ting‐Ting Li
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound ScreeningJiangsu Ocean UniversityLianyungangChina
| | - Lin‐Feng Wang
- State Key Laboratory of Crop Stress Adaptation and ImprovementSchool of Life SciencesHenan UniversityKaifengChina
| | - Kai‐Kai Lu
- State Key Laboratory of Crop Stress Adaptation and ImprovementSchool of Life SciencesHenan UniversityKaifengChina
| | - Jia‐Xing Guo
- State Key Laboratory of Crop Stress Adaptation and ImprovementSchool of Life SciencesHenan UniversityKaifengChina
| | - Wen‐Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and ImprovementSchool of Life SciencesHenan UniversityKaifengChina
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10
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Xiong E, Zhang C, Ye C, Jiang Y, Zhang Y, Chen F, Dong G, Zeng D, Yu Y, Wu L. iTRAQ-based proteomic analysis provides insights into the molecular mechanisms of rice formyl tetrahydrofolate deformylase in salt response. PLANTA 2021; 254:76. [PMID: 34533642 DOI: 10.1007/s00425-021-03723-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
A new molecular mechanism of tetrahydrofolate deformylase involved in the salt response presumably affects mitochondrial and chloroplast function by regulating energy metabolism and accumulation of reactive oxygen species. High salinity severely restrains plant growth and development, consequently leading to a reduction in grain yield. It is therefore critical to identify the components involved in plant salt resistance. In our previous study, we identified a rice leaf early-senescence mutant hpa1, which encodes a formyl tetrahydrofolate deformylase (Xiong et al. in Sci China Life Sci 64(5):720-738, 2021). Here, we report that HPA1 also plays a role in the salt response. To explore the molecular mechanism of HPA1 in salt resistance, we attempted to identify the differentially expressed proteins between wild type and hpa1 mutant for salinity treatment using an iTRAQ-based comparative protein quantification approach. A total of 4598 proteins were identified, of which 279 were significantly altered, including 177 up- and 102 down-regulated proteins. A functional analysis suggested that the 279 differentially expressed proteins are involved mainly in the regulation of oxidative phosphorylation, phenylpropanoid biosynthesis, photosynthesis, posttranslational modifications, protein turnover and energy metabolism. Moreover, a deficiency in HPA1 impaired chlorophyll metabolism and photosynthesis in chloroplasts and affected the electron flow of the electron transport chain in mitochondria. These changes led to abnormal energy metabolism and accumulation of reactive oxygen species, which may affect the permeability and integrity of cell membranes, leading to cell death. In addition, the results were verified by transcriptional or physiological experiments. Our results provide an insight into a new molecular mechanism of the tetrahydrofolate cycle protein formyl tetrahydrofolate deformylase, which is involved in the salt response, presumably by affecting mitochondrial and chloroplast function regulating energy metabolism and accumulation of reactive oxygen species under salt stress.
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Affiliation(s)
- Erhui Xiong
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Chen Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Chenxi Ye
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Yaohuang Jiang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Yanli Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Fei Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Guojun Dong
- State Key Laboratory for Rice Biology, China National Rice Research Institute, Hangzhou, 310006, Zhejiang, China
| | - Dali Zeng
- State Key Laboratory for Rice Biology, China National Rice Research Institute, Hangzhou, 310006, Zhejiang, China
| | - Yanchun Yu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Limin Wu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
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11
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Zhang Y, Wang LF, Li TT, Liu WC. Mutual Promotion of LAP2 and CAT2 Synergistically Regulates Plant Salt and Osmotic Stress Tolerance. FRONTIERS IN PLANT SCIENCE 2021; 12:672672. [PMID: 34177987 PMCID: PMC8220078 DOI: 10.3389/fpls.2021.672672] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/19/2021] [Indexed: 05/15/2023]
Abstract
Almost all abiotic stresses induce reactive oxygen species (ROS) overaccumulation, causing oxidative damages to plant cells. Catalase (CAT) plays a vital role in plant oxidative stress tolerance by scavenging stress-induced excess H2O2; thus, the identification of factors regulating catalase function will shed light on the underlying regulatory mechanisms. Here, we identified leucine aminopeptidase 2 (LAP2) as a novel CAT2-interacting protein and showed a mutual promotion effect of the two proteins in plant stress responses. LAP2 has a physical interaction with CAT2 in plant cells. The loss-of-function mutant of LAP2, lap2-3, is hypersensitive to salt or osmotic stress with increased ROS accumulation and malondialdehyde content and decreased catalase activity. The lap2-3 mutant has less CAT2 protein levels as CAT2 protein stability is impaired in the mutant. Scavenging excess ROS by glutathione or overexpressing CAT2 in the lap2-3 mutant recovers its hypersensitive phenotype to salt or osmotic stress. Further study showed that CAT2 promotes LAP2 hydrolysis activity with leucine-4-methylcoumaryl-7-amides as a substrate in vivo and in vitro, and thus, similar to the lap2-3 mutant, the cat2-1 mutant also has lower γ-aminobutyric acid content than the wild type. Together, our study reveals mutual promotion effects of CAT2 and LAP2 in conferring plant salt and osmotic stress tolerance.
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Affiliation(s)
- Yu Zhang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Lin-Feng Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Ting-Ting Li
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University, Lianyungang, China
| | - Wen-Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
- *Correspondence: Wen-Cheng Liu,
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Song RF, Li TT, Liu WC. Jasmonic Acid Impairs Arabidopsis Seedling Salt Stress Tolerance Through MYC2-Mediated Repression of CAT2 Expression. FRONTIERS IN PLANT SCIENCE 2021; 12:730228. [PMID: 34745163 PMCID: PMC8569249 DOI: 10.3389/fpls.2021.730228] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 09/24/2021] [Indexed: 05/17/2023]
Abstract
High salinity causes ionic, osmotic, and oxidative stresses to plants, and the antioxidant enzyme Catalase2 (CAT2) plays a vital role in this process, while how CAT2 expression is regulated during plant response to high salinity remains elusive. Here, we report that phytohormone jasmonic acid (JA) impairs plant salt stress tolerance by repressing CAT2 expression in an MYC2-dependent manner. Exogenous JA application decreased plant salt stress tolerance while the jar1 mutant with reduced bioactive JA-Ile accumulation showed enhanced salt stress tolerance. JA enhanced salt-induced hydrogen peroxide (H2O2) accumulation, while treatment with H2O2-scavenger glutathione compromised such effects of JA on plant H2O2 accumulation and salt stress tolerance. In addition, JA repressed CAT2 expression in salt-stressed wild-type plant but not in myc2, a mutant of the master transcriptional factor MYC2 in JA signaling, therefore, the myc2 mutant exhibited increased salt stress tolerance. Further study showed that mutation of CAT2 largely reverted lower reactive oxygen species (ROS) accumulation, higher CAT activity, and enhanced salt stress tolerance of the myc2 mutant in myc2 cat2-1 double mutant, revealing that CAT2 functions downstream JA-MYC2 module in plant response to high salinity. Together, our study reveals that JA impairs Arabidopsis seedling salt stress tolerance through MYC2-mediated repression of CAT2 expression.
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Affiliation(s)
- Ru-Feng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
| | - Ting-Ting Li
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University, Lianyungang, China
| | - Wen-Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng, China
- *Correspondence: Wen-Cheng Liu
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13
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Zhang Y, Ji TT, Li TT, Tian YY, Wang LF, Liu WC. Jasmonic acid promotes leaf senescence through MYC2-mediated repression of CATALASE2 expression in Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 299:110604. [PMID: 32900442 DOI: 10.1016/j.plantsci.2020.110604] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 05/25/2023]
Abstract
Plants relocate nutrients and energy from aging leaves to developing tissues during leaf senescence, which is important for plant growth, development, and responses to various environmental stimuli. Both jasmonic acid (JA) and H2O2 are two crucial signalling molecules positively regulating leaf senescence, whereas whether and how they are coordinated in leaf senescence remains elusive. Here, we report that H2O2 accumulates in JA-treated leaves, while scavenging the increased H2O2 can significantly suppresses JA-induced leaf senescence and the expression of senescence-associated genes (SAGs). The mutant myc2 with a mutation of MYC2, a master transcription factor in JA signalling pathway, exhibits delayed leaf senescence with increased catalase activity and decreased H2O2 accumulation compared with the wild type upon JA treatment. Further study showed that MYC2 downregulates CATALASE 2 (CAT2) expression by binding to its promoter, thus promoting JA-induced H2O2 accumulation and leaf senescence. Moreover, the delayed leaf senescence with reduced H2O2 accumulation and SAGs expression of the myc2 mutant is significantly reverted by the cat2-1 mutation in myc2 cat2-1 double mutant. Thus, our study reveals that JA represses CAT2 expression to increase H2O2 accumulation, thus promoting leaf senescence in a MYC2 dependent manner in Arabidopsis.
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Affiliation(s)
- Yu Zhang
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Tong-Tong Ji
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Ting-Ting Li
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University, Lianyungang 222005, China
| | - Yang-Yang Tian
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Lin-Feng Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Wen-Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, State Key Laboratory of Cotton Biology, School of Life Sciences, Henan University, Kaifeng 475004, China.
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Wei Y, Liu W, Hu W, Yan Y, Shi H. The chaperone MeHSP90 recruits MeWRKY20 and MeCatalase1 to regulate drought stress resistance in cassava. THE NEW PHYTOLOGIST 2020; 226:476-491. [PMID: 31782811 DOI: 10.1111/nph.16346] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 11/23/2019] [Indexed: 05/25/2023]
Abstract
The 90 kDa heat shock protein (HSP90) is widely involved in various developmental processes and stress responses in plants. However, the molecular chaperone HSP90-constructed protein complex and its function in cassava remain elusive. In this study, we report that HSP90 is essential for drought stress resistance in cassava by regulating abscisic acid (ABA) and hydrogen peroxide (H2 O2 ) using two specific protein inhibitors of HSP90 (geldanamycin (GDA) and radicicol (RAD)). Among 10 MeHSP90s, the transcript of MeHSP90.9 is largely induced during drought stress. Further investigation identifies MeWRKY20 and MeCatalase1 as MeHSP90.9-interacting proteins. MeHSP90.9-, MeWRKY20-, or MeCatalase1-silenced plants through virus-induced gene silencing display drought sensitivity in cassava, indicating that they are important to drought stress response. MeHSP90.9 can promote the direct transcriptional activation of MeWRKY20 on the W-box element of MeNCED5 promoter, encoding a key enzyme in ABA biosynthesis. Moreover, MeHSP90.9 positively regulates the activity of MeCatalase1, and MeHSP90.9-silenced cassava leaves accumulate more H2 O2 under drought stress. Taken together, we demonstrate that the MeHSP90.9 chaperone complex is a regulator of drought stress resistance in cassava.
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Affiliation(s)
- Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, China
| | - Wen Liu
- Key Laboratory of Three Gorges Regional Plant Genetics & Germplasm Enhancement (CTGU)/ Biotechnology Research Center, College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, Hubei, 443002, China
| | - Wei Hu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China
| | - Yu Yan
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, China
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, China
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Liu L, Liu F, Chu J, Yi X, Fan W, Tang T, Chen G, Guo Q, Zhao X. A transcriptome analysis reveals a role for the indole GLS-linked auxin biosynthesis in secondary dormancy in rapeseed (Brassica napus L.). BMC PLANT BIOLOGY 2019; 19:264. [PMID: 31215396 PMCID: PMC6582522 DOI: 10.1186/s12870-019-1866-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 06/03/2019] [Indexed: 05/08/2023]
Abstract
BACKGROUND Brassica napus L. has little or no primary dormancy, but exhibits great variation in secondary dormancy. Secondary dormancy potential in oilseed rape can lead to the emergence of volunteer plants that cause genetic contamination, reduced quality and biosafety issues. However, the mechanisms underlying secondary dormancy are poorly understood. In this study, cultivars Huaiyou-WSD-H2 (H) and Huaiyou-SSD-V1 (V), which exhibit low (approximately 5%) and high (approximately 95%) secondary dormancy rate, respectively, were identified. Four samples, before (Hb and Vb) and after (Ha and Va) secondary dormancy induction by polyethylene glycol (PEG), were collected to identify the candidate genes involved in secondary dormancy via comparative transcriptome profile analysis. RESULTS A total of 998 differentially expressed genes (DEGs), which are mainly involved in secondary metabolism, transcriptional regulation, protein modification and signaling pathways, were then detected. Among these DEGs, the expression levels of those involved in the sulfur-rich indole glucosinolate (GLS)-linked auxin biosynthesis pathway were markedly upregulated in the dormant seeds (Va), which were validated by qRT-PCR and subsequently confirmed via detection of altered concentrations of indole-3-acetic acid (IAA), IAA conjugates and precursors. Furthermore, exogenous IAA applications to cultivar H enhanced secondary dormancy. CONCLUSION This study first (to our knowledge) elucidated that indole GLS-linked auxin biosynthesis is enhanced during secondary dormancy induced by PEG, which provides valuable information concerning secondary dormancy and expands the current understanding of the role of auxin in rapeseed.
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Affiliation(s)
- Lei Liu
- Jiangsu Key Laboratory for Eco-agriculture Biotechnology around Hongze Lake, Huaiyin Normal University, Huai’an, 223300 China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environment Protection, Huaiyin Normal University, Huai’an, 223300 China
| | - Fuxia Liu
- Jiangsu Key Laboratory for Eco-agriculture Biotechnology around Hongze Lake, Huaiyin Normal University, Huai’an, 223300 China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environment Protection, Huaiyin Normal University, Huai’an, 223300 China
| | - Jinfang Chu
- National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xin Yi
- Jiangsu Key Laboratory for Eco-agriculture Biotechnology around Hongze Lake, Huaiyin Normal University, Huai’an, 223300 China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environment Protection, Huaiyin Normal University, Huai’an, 223300 China
| | - Wenqi Fan
- Jiangsu Key Laboratory for Eco-agriculture Biotechnology around Hongze Lake, Huaiyin Normal University, Huai’an, 223300 China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environment Protection, Huaiyin Normal University, Huai’an, 223300 China
- School of Food Science and Engineering, Yangzhou University, Yangzhou, 225127 China
| | - Tang Tang
- Jiangsu Key Laboratory for Eco-agriculture Biotechnology around Hongze Lake, Huaiyin Normal University, Huai’an, 223300 China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environment Protection, Huaiyin Normal University, Huai’an, 223300 China
| | - Guimin Chen
- Jiangsu Key Laboratory for Eco-agriculture Biotechnology around Hongze Lake, Huaiyin Normal University, Huai’an, 223300 China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environment Protection, Huaiyin Normal University, Huai’an, 223300 China
| | - Qiuhuan Guo
- National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xiangxiang Zhao
- Jiangsu Key Laboratory for Eco-agriculture Biotechnology around Hongze Lake, Huaiyin Normal University, Huai’an, 223300 China
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environment Protection, Huaiyin Normal University, Huai’an, 223300 China
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16
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Chen Y, Chen Y, Shi Z, Jin Y, Sun H, Xie F, Zhang L. Biosynthesis and Signal Transduction of ABA, JA, and BRs in Response to Drought Stress of Kentucky Bluegrass. Int J Mol Sci 2019. [PMID: 30875790 DOI: 10.artn128910.3390/ijms20061289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Abstract
Kentucky bluegrass (KB, Poa pratensis) is one of the most widely used cool-season turfgrass species, but it is sensitive to drought stress. Molecular studies in KB are hindered by its large and complex genome structure. In this study, a comparative transcriptomic study was conducted between a short and long period of water deficiency. Three transcriptome libraries were constructed and then sequenced by using leaf RNA samples of plants at 0, 2, and 16 h after PEG6000 treatment. A total of 199,083 differentially expressed genes (DEGs) were found. The Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation revealed that DEGs were enriched in "Plant hormone signal transduction" and "MAPK signaling pathway-Plant". Some key up-regulated genes, including PYL, JAZ, and BSK, were involved in hormone signaling transduction of abscisic acid, jasmonic acid, and brassinosteroid and possibly these genes play important roles in coping with drought stress in KB. Furthermore, our results showed that the concentrations of ABA, JA and BR increased significantly with the extension of the drought period. The specific DEGs encoding functional proteins, kinase and transcription factors, could be valuable information for genetic manipulation to promote drought tolerance of KB in the future.
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Affiliation(s)
- Yajun Chen
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Yang Chen
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
- College of Life Science, Agriculture and Forestry, Qiqihar University, Qiqihar 161006, China.
| | - Zhenjie Shi
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Yifeng Jin
- College of Life Science, Agriculture and Forestry, Qiqihar University, Qiqihar 161006, China.
| | - Huashan Sun
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Fuchun Xie
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Lu Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
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17
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Chen Y, Chen Y, Shi Z, Jin Y, Sun H, Xie F, Zhang L. Biosynthesis and Signal Transduction of ABA, JA, and BRs in Response to Drought Stress of Kentucky Bluegrass. Int J Mol Sci 2019; 20:E1289. [PMID: 30875790 PMCID: PMC6471471 DOI: 10.3390/ijms20061289] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/08/2019] [Accepted: 03/10/2019] [Indexed: 01/17/2023] Open
Abstract
Kentucky bluegrass (KB, Poa pratensis) is one of the most widely used cool-season turfgrass species, but it is sensitive to drought stress. Molecular studies in KB are hindered by its large and complex genome structure. In this study, a comparative transcriptomic study was conducted between a short and long period of water deficiency. Three transcriptome libraries were constructed and then sequenced by using leaf RNA samples of plants at 0, 2, and 16 h after PEG6000 treatment. A total of 199,083 differentially expressed genes (DEGs) were found. The Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation revealed that DEGs were enriched in "Plant hormone signal transduction" and "MAPK signaling pathway-Plant". Some key up-regulated genes, including PYL, JAZ, and BSK, were involved in hormone signaling transduction of abscisic acid, jasmonic acid, and brassinosteroid and possibly these genes play important roles in coping with drought stress in KB. Furthermore, our results showed that the concentrations of ABA, JA and BR increased significantly with the extension of the drought period. The specific DEGs encoding functional proteins, kinase and transcription factors, could be valuable information for genetic manipulation to promote drought tolerance of KB in the future.
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Affiliation(s)
- Yajun Chen
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Yang Chen
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
- College of Life Science, Agriculture and Forestry, Qiqihar University, Qiqihar 161006, China.
| | - Zhenjie Shi
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Yifeng Jin
- College of Life Science, Agriculture and Forestry, Qiqihar University, Qiqihar 161006, China.
| | - Huashan Sun
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Fuchun Xie
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Lu Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
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Yang Z, Mhamdi A, Noctor G. Analysis of catalase mutants underscores the essential role of CATALASE2 for plant growth and day length-dependent oxidative signalling. PLANT, CELL & ENVIRONMENT 2019; 42:688-700. [PMID: 30291629 DOI: 10.1111/pce.13453] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/26/2018] [Accepted: 09/27/2018] [Indexed: 06/08/2023]
Abstract
Three genes encode catalase in Arabidopsis. Although the role of CAT2 in photorespiration is well established, the importance of the different catalases in other processes is less clear. Analysis of cat1, cat2, cat3, cat1 cat2, and cat2 cat3 T-DNA mutants revealed that cat2 had the largest effect on activity in both roots and leaves. Root growth was inhibited in all cat2-containing lines, but this inhibition was prevented by growing plants at high CO2 , suggesting that it is mainly an indirect effect of stress at the leaf level. Analysis of double mutants suggested some overlap between CAT2 and CAT3 functions in leaves and CAT1 and CAT2 in seeds. When plants had been grown to a similar developmental stage in short days or long days, equal-time exposure to oxidative stress caused by genetic or pharmacological inhibition of catalase produced a much stronger induction of H2 O2 marker genes in short day plants. Together, our data (a) underline the importance of CAT2 in basal H2 O2 processing in Arabidopsis; (b) suggest that CAT1 and CAT3 are mainly "backup" or stress-specific enzymes; and (c) establish that day length-dependent responses to catalase deficiency are independent of the duration of oxidative stress.
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Affiliation(s)
- Zheng Yang
- Institute of Plant Sciences Paris Saclay IPS2, Université Paris-Sud, CNRS, INRA, Université Evry, Paris Diderot, Sorbonne Paris-Cité, Université Paris-Saclay, Orsay, France
| | - Amna Mhamdi
- Institute of Plant Sciences Paris Saclay IPS2, Université Paris-Sud, CNRS, INRA, Université Evry, Paris Diderot, Sorbonne Paris-Cité, Université Paris-Saclay, Orsay, France
| | - Graham Noctor
- Institute of Plant Sciences Paris Saclay IPS2, Université Paris-Sud, CNRS, INRA, Université Evry, Paris Diderot, Sorbonne Paris-Cité, Université Paris-Saclay, Orsay, France
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