1
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Han Y, Haouel A, Georgii E, Priego-Cubero S, Wurm CJ, Hemmler D, Schmitt-Kopplin P, Becker C, Durner J, Lindermayr C. Histone Deacetylases HD2A and HD2B Undergo Feedback Regulation by ABA and Modulate Drought Tolerance via Mediating ABA-Induced Transcriptional Repression. Genes (Basel) 2023; 14:1199. [PMID: 37372378 DOI: 10.3390/genes14061199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023] Open
Abstract
Histone deacetylation catalyzed by histone deacetylase plays a critical role in gene silencing and subsequently controls many important biological processes. It was reported that the expression of the plant-specific histone deacetylase subfamily HD2s is repressed by ABA in Arabidopsis. However, little is known about the molecular relationship between HD2A/HD2B and ABA during the vegetative phase. Here, we describe that the hd2ahd2b mutant shows hypersensitivity to exogenous ABA during the germination and post-germination period. Additionally, transcriptome analyses revealed that the transcription of ABA-responsive genes was reprogrammed and the global H4K5ac level is specifically up-regulated in hd2ahd2b plants. ChIP-Seq and ChIP-qPCR results further verified that both HD2A and HD2B could directly and specifically bind to certain ABA-responsive genes. As a consequence, Arabidopsis hd2ahd2b plants displayed enhanced drought resistance in comparison to WT, which is consistent with increased ROS content, reduced stomatal aperture, and up-regulated drought-resistance-related genes. Moreover, HD2A and HD2B repressed ABA biosynthesis via the deacetylation of H4K5ac at NCED9. Taken together, our results indicate that HD2A and HD2B partly function through ABA signaling and act as negative regulators during the drought resistance response via the regulation of ABA biosynthesis and response genes.
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Affiliation(s)
- Yongtao Han
- Institute of Biochemical Plant Pathology, Helmholtz Munich, 85764 Oberschleißheim, Germany
| | - Amira Haouel
- Institute of Biochemical Plant Pathology, Helmholtz Munich, 85764 Oberschleißheim, Germany
| | - Elisabeth Georgii
- Institute of Biochemical Plant Pathology, Helmholtz Munich, 85764 Oberschleißheim, Germany
| | | | - Christoph J Wurm
- Institute of Biochemical Plant Pathology, Helmholtz Munich, 85764 Oberschleißheim, Germany
| | - Daniel Hemmler
- Research Unit Analytical Biogeochemistry, Helmholtz Munich, 85764 Oberschleißheim, Germany
| | | | - Claude Becker
- Genetics, LMU Biocenter, Ludwig-Maximilians-Universität München, 80539 München, Germany
| | - Jörg Durner
- Institute of Biochemical Plant Pathology, Helmholtz Munich, 85764 Oberschleißheim, Germany
- Chair of Biochemical Plant Pathology, Technische Universität München, 85354 Freising, Germany
| | - Christian Lindermayr
- Institute of Biochemical Plant Pathology, Helmholtz Munich, 85764 Oberschleißheim, Germany
- Institute of Lung Health and Immunity, Comprehensive Pneumology Center, Helmholtz Munich, 85764 Oberschleißheim, Germany
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Ding Y, Zhou M, Wang K, Qu A, Hu S, Jiang Q, Yi K, Wang F, Cai C, Zhu C, Chen Z. Rice DST transcription factor negatively regulates heat tolerance through ROS-mediated stomatal movement and heat-responsive gene expression. FRONTIERS IN PLANT SCIENCE 2023; 14:1068296. [PMID: 36798712 PMCID: PMC9927019 DOI: 10.3389/fpls.2023.1068296] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Plants are frequently subjected to a broad spectrum of abiotic stresses including drought, salinity and extreme temperatures and have evolved both common and stress-specific responses to promote fitness and survival. Understanding the components and mechanisms that underlie both common and stress-specific responses can enable development of crop plants tolerant to different stresses. Here, we report a rice heat stress-tolerant 1 (hst1) mutant with increased heat tolerance. HST1 encodes the DST transcription factor, which also regulates drought and salinity tolerance. Increased heat tolerance of hst1 was associated with suppressed expression of reactive oxygen species (ROS)-scavenging peroxidases and increased ROS levels, which reduced water loss by decreasing stomatal aperture under heat stress. In addition, increased ROS levels enhanced expression of genes encoding heat shock protein (HSPs) including HSP80, HSP74, HSP58 and small HSPs. HSPs promote stabilization of proteins and protein refolding under heat stress and accordingly mutation of HST1 also improved reproductive traits including pollen viability and seed setting under high temperature. These results broaden the negative roles of DST in abiotic stress tolerance and provide important new insights into DST-regulated tolerance to diverse abiotic stresses through both shared and stress-specific mechanisms.
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Affiliation(s)
- Yanfei Ding
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Mei Zhou
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Ke Wang
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Aili Qu
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Ningbo, China
| | - Shanshan Hu
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Qiong Jiang
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Keke Yi
- Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Science, Beijing, China
| | - Feijuan Wang
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Chong Cai
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Cheng Zhu
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Zhixiang Chen
- Key Laboratory of Specialty Agri-product Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, United States
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Wang YH, Que F, Li T, Zhang RR, Khadr A, Xu ZS, Tian YS, Xiong AS. DcABF3, an ABF transcription factor from carrot, alters stomatal density and reduces ABA sensitivity in transgenic Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 302:110699. [PMID: 33288012 DOI: 10.1016/j.plantsci.2020.110699] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/14/2020] [Accepted: 10/02/2020] [Indexed: 05/27/2023]
Abstract
Abscisic acid-responsive element (ABRE)-binding factors (ABFs) are important transcription factors involved in various physiological processes in plants. Stomata are micro channels for water and gas exchange of plants. Previous researches have demonstrated that ABFs can modulate the stomatal development in some plants. However, little is known about stomata-related functions of ABFs in carrots. In our study, DcABF3, a gene encoding for ABF transcription factor, was isolated from carrot. The open reading frame of DcABF3 was 1329 bp, encoding 442 amino acids. Expression profiles of DcABF3 indicated that DcABF3 can respond to drought, salt or ABA treatment in carrots. Overexpressing DcABF3 in Arabidopsis led to the increase of stomatal density which caused severe water loss. Expression assay indicated that overexpression of DcABF3 caused high expression of stomatal development-related transcription factor genes, SPCH, FAMA, MUTE and SCRMs. Increased antioxidant enzyme activities and higher expression levels of stress-related genes were also found in transgenic lines after water deficit treatment. Changes in expression of ABA synthesis-related genes and AtABIs indicated the potential role of DcABF3 in ABA signaling pathway. Under the treatment of exogenous ABA, DcABF3-overexpression Arabidopsis seedlings exhibited increased root length and germination rate. Our findings demonstrated that heterologous overexpression of DcABF3 positively affected stomatal development and also reduced ABA sensitivity in transgenic Arabidopsis.
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Affiliation(s)
- Ya-Hui Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Feng Que
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Tong Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Rong-Rong Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Ahmed Khadr
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Zhi-Sheng Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Yong-Sheng Tian
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Ai-Sheng Xiong
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China.
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4
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Zhang L, Li D, Yao Y, Zhang S. H 2O 2, Ca 2+, and K + in subsidiary cells of maize leaves are involved in regulatory signaling of stomatal movement. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 152:243-251. [PMID: 32449683 DOI: 10.1016/j.plaphy.2020.04.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/11/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
The stomata of maize (Zea mays) contain a pair of guard cells and a pair of subsidiary cells. To determine whether H2O2, Ca2+, and K+ in subsidiary cells were involved in stomatal movement, we treated four-week-old maize (Zhengdan 958) leaves with H2O2, diphenylene iodonium (DPI), CaCl2, and LaCl3. Changes in content and distribution of H2O2, Ca2+, and K+ during stomatal movement were observed. When exogenous H2O2 was applied, Ca2+ increased and K+ decreased in guard cells, while both ions increased in subsidiary cells, leading to stomatal closure. After DPI treatment, Ca2+ decreased and K+ increased in guard cells, but both Ca2+ and K+ decreased in subsidiary cells, resulting in open stomata. Exogenous CaCl2 increased H2O2 and reduced K+ in guard cells, while significantly increasing them in subsidiary cells and causing stomatal closure. After LaCl3 treatment, H2O2 decreased and K+ increased in guard cells, whereas both decreased in subsidiary cells and stomata became open. Results indicate that H2O2 and Ca2+ correlate positively with each other and with K+ in subsidiary cells during stomatal movement. Both H2O2 and Ca2+ in subsidiary cells promote an inflow of K+, indirectly regulating stomatal closure.
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Affiliation(s)
- Li Zhang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, 712100, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dongyang Li
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yaqin Yao
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Suiqi Zhang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, 712100, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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5
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Meng LS. Compound Synthesis or Growth and Development of Roots/Stomata Regulate Plant Drought Tolerance or Water Use Efficiency/Water Uptake Efficiency. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:3595-3604. [PMID: 29589939 DOI: 10.1021/acs.jafc.7b05990] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Water is crucial to plant growth and development because it serves as a medium for all cellular functions. Thus, the improvement of plant drought tolerance or water use efficiency/water uptake efficiency is important in modern agriculture. In this review, we mainly focus on new genetic factors for ameliorating drought tolerance or water use efficiency/water uptake efficiency of plants and explore the involvement of these genetic factors in the regulation of improving plant drought tolerance or water use efficiency/water uptake efficiency, which is a result of altered stomata density and improving root systems (primary root length, hair root growth, and lateral root number) and enhanced production of osmotic protectants, which is caused by transcription factors, proteinases, and phosphatases and protein kinases. These results will help guide the synthesis of a model for predicting how the signals of genetic and environmental stress are integrated at a few genetic determinants to control the establishment of either water use efficiency or water uptake efficiency. Collectively, these insights into the molecular mechanism underpinning the control of plant drought tolerance or water use efficiency/water uptake efficiency may aid future breeding or design strategies to increase crop yield.
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Affiliation(s)
- Lai-Sheng Meng
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , People's Republic of China
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6
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Hu Y, Wu Q, Peng Z, Sprague SA, Wang W, Park J, Akhunov E, Jagadish KSV, Nakata PA, Cheng N, Hirschi KD, White FF, Park S. Silencing of OsGRXS17 in rice improves drought stress tolerance by modulating ROS accumulation and stomatal closure. Sci Rep 2017; 7:15950. [PMID: 29162892 PMCID: PMC5698295 DOI: 10.1038/s41598-017-16230-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 11/09/2017] [Indexed: 12/02/2022] Open
Abstract
Glutaredoxins (GRXs) modulate redox-dependent signaling pathways and have emerged as key mediators in plant responses to environmental stimuli. Here we report that RNAi-mediated suppression of Oryza sativa GRXS17 (OsGRXS17) improved drought tolerance in rice. Gene expression studies showed that OsGRXS17 was present throughout the plant and that transcript abundance increased in response to drought stress and abscisic acid (ABA) treatment. Localization studies, utilizing GFP-OsGRXS17 fusion proteins, indicated that OsGRXS17 resides in both the cytoplasm and the nuclear envelope. Under drought stress conditions, rice plants with reduced OsGRXS17 expression showed lower rates of water loss and stomatal conductance, higher relative water content, and enhanced survival compared to wild-type controls. Further characterization of the OsGRXS17 down-regulated plants revealed an elevation in H2O2 production within the guard cells, increased sensitivity to ABA, and a reduction in stomatal apertures. The findings demonstrate a critical link between OsGRXS17, the modulation of guard cell H2O2 concentrations, and stomatal closure, expanding our understanding of the mechanisms governing plant responses to drought.
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Affiliation(s)
- Ying Hu
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA.,Department of Plant Pathology, Kansas State University, Manhattan, KS, 66506, USA
| | - Qingyu Wu
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA.,Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, 11724, USA
| | - Zhao Peng
- Department of Plant Pathology, Kansas State University, Manhattan, KS, 66506, USA.,Department of Plant Pathology, University of Florida, Gainesville, FL, 32611, USA
| | - Stuart A Sprague
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA
| | - Wei Wang
- Department of Plant Pathology, Kansas State University, Manhattan, KS, 66506, USA
| | - Jungeun Park
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA
| | - Eduard Akhunov
- Department of Plant Pathology, Kansas State University, Manhattan, KS, 66506, USA
| | | | - Paul A Nakata
- United States Department of Agriculture/Agricultural Research Service, Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Ninghui Cheng
- United States Department of Agriculture/Agricultural Research Service, Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Kendal D Hirschi
- United States Department of Agriculture/Agricultural Research Service, Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Frank F White
- Department of Plant Pathology, Kansas State University, Manhattan, KS, 66506, USA. .,Department of Plant Pathology, University of Florida, Gainesville, FL, 32611, USA.
| | - Sunghun Park
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA.
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Wu Q, Hu Y, Sprague SA, Kakeshpour T, Park J, Nakata PA, Cheng N, Hirschi KD, White FF, Park S. Expression of a monothiol glutaredoxin, AtGRXS17, in tomato (Solanum lycopersicum) enhances drought tolerance. Biochem Biophys Res Commun 2017; 491:1034-1039. [PMID: 28780355 DOI: 10.1016/j.bbrc.2017.08.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 08/01/2017] [Indexed: 11/19/2022]
Abstract
Abiotic stresses are a major factor limiting crop growth and productivity. The Arabidopsis thaliana glutaredoxin S17 (AtGRXS17) gene has conserved functions in plant tolerance to heat and chilling stress in Arabidopsis and, when expressed ectopically, in tomato. Here, we report that ectopic expression of AtGRXS17 in tomato also enhanced tolerance to drought and oxidative stress. AtGRXS17-expressing tomato plants contained twice the shoot water content compared to wild-type plants under water limiting conditions. This enhanced drought tolerance correlated with a higher maximal photosynthetic efficiency of photosystem II (Fv/Fm). Ectopic AtGRXS17-expression was concomitant with the expression of Solanum lycopersicum catalase 1 (SlCAT1) and mitigated defects in the growth of primary roots in response to methyl viologen exposure. In addition, AtGRXS17 expression was found to prolong elevated expression levels of the Solanum lycopersicum ABA-responsive element binding protein 1 (SlAREB1) during drought stress. The findings demonstrate that expression of AtGRXS17 can simultaneously improve the tolerance of tomato, and possibly other agriculturally important crops, to drought, heat, and chilling stresses.
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Affiliation(s)
- Qingyu Wu
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA
| | - Ying Hu
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA
| | - Stuart A Sprague
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA
| | - Tayebeh Kakeshpour
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA
| | - Jungeun Park
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA
| | - Paul A Nakata
- United States Department of Agriculture/Agricultural Research Service, Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Ninghui Cheng
- United States Department of Agriculture/Agricultural Research Service, Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Kendal D Hirschi
- United States Department of Agriculture/Agricultural Research Service, Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Frank F White
- Department of Plant Pathology, University of Florida, Gainesville, FL, 32611, USA
| | - Sunghun Park
- Department of Horticulture and Natural Resources, Kansas State University, Manhattan, KS, 66506, USA.
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Wang C, Liu S, Dong Y, Zhao Y, Geng A, Xia X, Yin W. PdEPF1 regulates water-use efficiency and drought tolerance by modulating stomatal density in poplar. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:849-60. [PMID: 26228739 DOI: 10.1111/pbi.12434] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 06/02/2015] [Accepted: 06/10/2015] [Indexed: 05/18/2023]
Abstract
Water deficiency is a critical environmental condition that is seriously reducing global plant production. Improved water-use efficiency (WUE) and drought tolerance are effective strategies to address this problem. In this study, PdEPF1, a member of the EPIDERMAL PATTERNING FACTOR (EPF) family, was isolated from the fast-growing poplar clone NE-19 [Populus nigra × (Populus deltoides × Populus nigra)]. Significantly, higher PdEPF1 levels were detected after induction by dehydration and abscisic acid. To explore the biological functions of PdEPF1, transgenic triploid white poplars (Populus tomentosa 'YiXianCiZhu B385') overexpressing PdEPF1 were constructed. PdEPF1 overexpression resulted in increased water deficit tolerance and greater WUE. We confirmed that the transgenic lines with greater instantaneous WUE had approximately 30% lower transpiration but equivalent CO2 assimilation. Lower transpiration was associated with a 28% reduction in abaxial stomatal density. PdEPF1 overexpression not only strongly enhanced WUE, but also greatly improved drought tolerance, as measured by the leaf relative water content and water potential, under limited water conditions. In addition, the growth of these oxPdEPF1 plants was less adversely affected by reduced water availability than plants with a higher stomatal density, indicating that plants with a low stomatal density may be well suited to grow in water-scarce environments. Taken together, our data suggest that PdEPF1 improves WUE and confers drought tolerance in poplar; thus, it could be used to breed drought-tolerant plants with increased production under conditions of water deficiency.
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Affiliation(s)
- Congpeng Wang
- Nation Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Sha Liu
- Nation Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Yan Dong
- Nation Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
- Liaoning Forestry Vocational- Technical College, Shenyang, China
| | - Ying Zhao
- Nation Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Anke Geng
- Nation Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Xinli Xia
- Nation Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
| | - Weilun Yin
- Nation Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
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9
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Bromham L. Macroevolutionary patterns of salt tolerance in angiosperms. ANNALS OF BOTANY 2015; 115:333-41. [PMID: 25452251 PMCID: PMC4332609 DOI: 10.1093/aob/mcu229] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 04/29/2014] [Accepted: 09/30/2014] [Indexed: 05/21/2023]
Abstract
BACKGROUND Halophytes are rare, with only 0·25% of angiosperm species able to complete their life cycle in saline conditions. This could be interpreted as evidence that salt tolerance is difficult to evolve. However, consideration of the phylogenetic distribution of halophytes paints a different picture: salt tolerance has evolved independently in many different lineages, and halophytes are widely distributed across angiosperm families. In this Viewpoint, I will consider what phylogenetic analysis of halophytes can tell us about the macroevolution of salt tolerance. HYPOTHESIS Phylogenetic analyses of salt tolerance have shown contrasting patterns in different families. In some families, such as chenopods, salt tolerance evolved early in the lineage and has been retained in many lineages. But in other families, including grasses, there have been a surprisingly large number of independent origins of salt tolerance, most of which are relatively recent and result in only one or a few salt-tolerant species. This pattern of many recent origins implies either a high transition rate (salt tolerance is gained and lost often) or a high extinction rate (salt-tolerant lineages do not tend to persist over macroevolutionary timescales). While salt tolerance can evolve in a wide range of genetic backgrounds, some lineages are more likely to produce halophytes than others. This may be due to enabling traits that act as stepping stones to developing salt tolerance. The ability to tolerate environmental salt may increase tolerance of other stresses or vice versa. CONCLUSIONS Phylogenetic analyses suggest that enabling traits and cross-tolerances may make some lineages more likely to adapt to increasing salinization, a finding that may prove useful in assessing the probable impact of rapid environmental change on vegetation communities, and in selecting taxa to develop for use in landscape rehabilitation and agriculture.
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Affiliation(s)
- Lindell Bromham
- Centre for Macroevolution and Macroecology, Research School of Biology, Australian National University, Canberra, ACT 0200, Australia
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10
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Song Y, Miao Y, Song CP. Behind the scenes: the roles of reactive oxygen species in guard cells. THE NEW PHYTOLOGIST 2014; 201:1121-1140. [PMID: 24188383 DOI: 10.1111/nph.12565] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Accepted: 09/25/2013] [Indexed: 05/19/2023]
Abstract
Guard cells regulate stomatal pore size through integration of both endogenous and environmental signals; they are widely recognized as providing a key switching mechanism that maximizes both the efficient use of water and rates of CO₂ exchange for photosynthesis; this is essential for the adaptation of plants to water stress. Reactive oxygen species (ROS) are widely considered to be an important player in guard cell signalling. In this review, we focus on recent progress concerning the role of ROS as signal molecules in controlling stomatal movement, the interaction between ROS and intrinsic and environmental response pathways, the specificity of ROS signalling, and how ROS signals are sensed and relayed. However, the picture of ROS-mediated signalling is still fragmented and the issues of ROS sensing and the specificity of ROS signalling remain unclear. Here, we review some recent advances in our understanding of ROS signalling in guard cells, with an emphasis on the main players known to interact with abscisic acid signalling.
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Affiliation(s)
- Yuwei Song
- Institute of Plant Stress Biology, National Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, 475001, China
| | - Yuchen Miao
- Institute of Plant Stress Biology, National Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, 475001, China
| | - Chun-Peng Song
- Institute of Plant Stress Biology, National Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, 475001, China
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Transcription factor AtbZIP60 regulates expression of Ca2+-dependent protein kinase genes in transgenic cells. Mol Biol Rep 2012; 40:2723-32. [DOI: 10.1007/s11033-012-2362-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Accepted: 12/17/2012] [Indexed: 11/26/2022]
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Sehgal D, Rajaram V, Armstead IP, Vadez V, Yadav YP, Hash CT, Yadav RS. Integration of gene-based markers in a pearl millet genetic map for identification of candidate genes underlying drought tolerance quantitative trait loci. BMC PLANT BIOLOGY 2012; 12:9. [PMID: 22251627 PMCID: PMC3287966 DOI: 10.1186/1471-2229-12-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 01/17/2012] [Indexed: 05/21/2023]
Abstract
BACKGROUND Identification of genes underlying drought tolerance (DT) quantitative trait loci (QTLs) will facilitate understanding of molecular mechanisms of drought tolerance, and also will accelerate genetic improvement of pearl millet through marker-assisted selection. We report a map based on genes with assigned functional roles in plant adaptation to drought and other abiotic stresses and demonstrate its use in identifying candidate genes underlying a major DT-QTL. RESULTS Seventy five single nucleotide polymorphism (SNP) and conserved intron spanning primer (CISP) markers were developed from available expressed sequence tags (ESTs) using four genotypes, H 77/833-2, PRLT 2/89-33, ICMR 01029 and ICMR 01004, representing parents of two mapping populations. A total of 228 SNPs were obtained from 30.5 kb sequenced region resulting in a SNP frequency of 1/134 bp. The positions of major pearl millet linkage group (LG) 2 DT-QTLs (reported from crosses H 77/833-2 × PRLT 2/89-33 and 841B × 863B) were added to the present consensus function map which identified 18 genes, coding for PSI reaction center subunit III, PHYC, actin, alanine glyoxylate aminotransferase, uridylate kinase, acyl-CoA oxidase, dipeptidyl peptidase IV, MADS-box, serine/threonine protein kinase, ubiquitin conjugating enzyme, zinc finger C- × 8-C × 5-C × 3-H type, Hd3, acetyl CoA carboxylase, chlorophyll a/b binding protein, photolyase, protein phosphatase1 regulatory subunit SDS22 and two hypothetical proteins, co-mapping in this DT-QTL interval. Many of these candidate genes were found to have significant association with QTLs of grain yield, flowering time and leaf rolling under drought stress conditions. CONCLUSIONS We have exploited available pearl millet EST sequences to generate a mapped resource of seventy five new gene-based markers for pearl millet and demonstrated its use in identifying candidate genes underlying a major DT-QTL in this species. The reported gene-based markers represent an important resource for identification of candidate genes for other mapped abiotic stress QTLs in pearl millet. They also provide a resource for initiating association studies using candidate genes and also for comparing the structure and function of distantly related plant genomes such as other Poaceae members.
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Affiliation(s)
- Deepmala Sehgal
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Gogerddan, Aberystwyth, Ceredigion SY23 3 EB, UK
| | - Vengaldas Rajaram
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), ICRISAT-Patencheru, Hyderabad 502 324, Andhra Pradesh, India
| | - Ian Peter Armstead
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Gogerddan, Aberystwyth, Ceredigion SY23 3 EB, UK
| | - Vincent Vadez
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), ICRISAT-Patencheru, Hyderabad 502 324, Andhra Pradesh, India
| | - Yash Pal Yadav
- Chaudhary Charan Singh Haryana Agricultural University (CCSHAU), Bawal 123 501, Haryana, India
| | - Charles Thomas Hash
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), ICRISAT-Patencheru, Hyderabad 502 324, Andhra Pradesh, India
| | - Rattan Singh Yadav
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Gogerddan, Aberystwyth, Ceredigion SY23 3 EB, UK
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Santos AP, Serra T, Figueiredo DD, Barros P, Lourenço T, Chander S, Oliveira MM, Saibo NJM. Transcription regulation of abiotic stress responses in rice: a combined action of transcription factors and epigenetic mechanisms. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2011; 15:839-57. [PMID: 22136664 DOI: 10.1089/omi.2011.0095] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Plant growth and crop production are highly reduced by adverse environmental conditions and rice is particularly sensitive to abiotic stresses. Plants have developed a number of different mechanisms to respond and try to adapt to abiotic stress. Plant response to stress such as drought, cold, and high salinity, implies rapid and coordinated changes at transcriptional level of entire gene networks. During the last decade many transcription factors, belonging to different families, have been shown to act as positive or negative regulators of stress responsive genes, thus playing an extremely important role in stress signaling. More recently, epigenetic mechanisms have been also involved in the regulation of the stress responsive genes. In this review, we have performed a comprehensive analysis of the rice transcription factors reported so far as being involved in abiotic stress responses. The impact of abiotic stresses on epigenomes is also addressed. Finally, we update the connections made so far between DNA-binding transcription factors (TFs), and epigenetic mechanisms (DNA methylation and histones methylation or acetylation) emphasizing an integrative view of transcription regulation.
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Affiliation(s)
- Ana Paula Santos
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa and Instituto de Biologia Experimental e Tecnológica, Oeiras. Portugal
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Cho SK, Ryu MY, Seo DH, Kang BG, Kim WT. The Arabidopsis RING E3 ubiquitin ligase AtAIRP2 plays combinatory roles with AtAIRP1 in abscisic acid-mediated drought stress responses. PLANT PHYSIOLOGY 2011; 157:2240-57. [PMID: 21969385 PMCID: PMC3327188 DOI: 10.1104/pp.111.185595] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The ubiquitin (Ub)-26S proteasome pathway is implicated in various cellular processes in higher plants. AtAIRP1, a C3H2C3-type RING (for Really Interesting New Gene) E3 Ub ligase, is a positive regulator in the Arabidopsis (Arabidopsis thaliana) abscisic acid (ABA)-dependent drought response. Here, the AtAIRP2 (for Arabidopsis ABA-insensitive RING protein 2) gene was identified and characterized. AtAIRP2 encodes a cytosolic C3HC4-type RING E3 Ub ligase whose expression was markedly induced by ABA and dehydration stress. Thus, AtAIRP2 belongs to a different RING subclass than AtAIRP1 with a limited sequence identity. AtAIRP2-overexpressing transgenic (35S:AtAIRP2-sGFP) and atairp2 loss-of-function mutant plants exhibited hypersensitive and hyposensitive phenotypes, respectively, to ABA in terms of seed germination, root growth, and stomatal movement. 35S:AtAIRP2-sGFP plants were highly tolerant to severe drought stress, and atairp2 alleles were more susceptible to water stress than were wild-type plants. Higher levels of drought-induced hydrogen peroxide production were detected in 35S:AtAIRP2-sGFP as compared with atairp2 plants. ABA-inducible drought-related genes were up-regulated in 35S:AtAIRP2-sGFP and down-regulated in atairp2 progeny. The positive effects of AtAIRP2 on ABA-induced stress genes were dependent on SNF1-related protein kinases, key components of the ABA signaling pathway. Therefore, AtAIRP2 is involved in positive regulation of ABA-dependent drought stress responses. To address the functional relationship between AtAIRP1 and AtAIRP2, FLAG-AtAIRP1 and AtAIRP2-sGFP genes were ectopically expressed in atairp2-2 and atairp1 plants, respectively. Constitutive expression of FLAG-AtAIRP1 and AtAIRP2-sGFP in atairp2-2 and atairp1 plants, respectively, reciprocally rescued the loss-of-function ABA-insensitive phenotypes during germination. Additionally, atairp1/35S:AtAIRP2-sGFP and atairp2-2/35S:FLAG-AtAIRP1 complementation lines were more tolerant to dehydration stress relative to atairp1 and atairp2-2 single knockout plants. Overall, these results suggest that AtAIRP2 plays combinatory roles with AtAIRP1 in Arabidopsis ABA-mediated drought stress responses.
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Jamil A, Riaz S, Ashraf M, Foolad MR. Gene Expression Profiling of Plants under Salt Stress. CRITICAL REVIEWS IN PLANT SCIENCES 2011; 30:435-458. [PMID: 0 DOI: 10.1080/07352689.2011.605739] [Citation(s) in RCA: 228] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
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Yoo CY, Pence HE, Jin JB, Miura K, Gosney MJ, Hasegawa PM, Mickelbart MV. The Arabidopsis GTL1 transcription factor regulates water use efficiency and drought tolerance by modulating stomatal density via transrepression of SDD1. THE PLANT CELL 2010; 22:4128-41. [PMID: 21169508 PMCID: PMC3027182 DOI: 10.1105/tpc.110.078691] [Citation(s) in RCA: 216] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 11/11/2010] [Accepted: 11/24/2010] [Indexed: 05/18/2023]
Abstract
A goal of modern agriculture is to improve plant drought tolerance and production per amount of water used, referred to as water use efficiency (WUE). Although stomatal density has been linked to WUE, the causal molecular mechanisms have yet to be determined. Arabidopsis thaliana GT-2 LIKE 1 (GTL1) loss-of-function mutations result in increased water deficit tolerance and higher integrated WUE by reducing daytime transpiration without a demonstrable reduction in biomass accumulation. gtl1 plants had higher instantaneous WUE that was attributable to ~25% lower transpiration and stomatal conductance but equivalent CO(2) assimilation. Lower transpiration was associated with higher STOMATAL DENSITY AND DISTRIBUTION1 (SDD1) expression and an ~25% reduction in abaxial stomatal density. GTL1 expression occurred in abaxial epidermal cells where the protein was localized to the nucleus, and its expression was downregulated by water stress. Chromatin immunoprecipitation analysis indicated that GTL1 interacts with a region of the SDD1 promoter that contains a GT3 box. An electrophoretic mobility shift assay was used to determine that the GT3 box is necessary for the interaction between GTL1 and the SDD1 promoter. These results establish that GTL1 negatively regulates WUE by modulating stomatal density via transrepression of SDD1.
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Affiliation(s)
- Chan Yul Yoo
- Center for Plant Environmental Stress Physiology, Purdue University, West Lafayette, Indiana 47907-2010
| | - Heather E. Pence
- Center for Plant Environmental Stress Physiology, Purdue University, West Lafayette, Indiana 47907-2010
| | - Jing Bo Jin
- Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Kenji Miura
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8572, Japan
| | - Michael J. Gosney
- Center for Plant Environmental Stress Physiology, Purdue University, West Lafayette, Indiana 47907-2010
| | - Paul M. Hasegawa
- Center for Plant Environmental Stress Physiology, Purdue University, West Lafayette, Indiana 47907-2010
| | - Michael V. Mickelbart
- Center for Plant Environmental Stress Physiology, Purdue University, West Lafayette, Indiana 47907-2010
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