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Sahu M, Kar RK. Possible interaction of ROS, antioxidants and ABA to survive osmotic stress upon acclimation in Vigna radiata L. Wilczek seedlings. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 132:415-423. [PMID: 30290333 DOI: 10.1016/j.plaphy.2018.09.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 09/14/2018] [Accepted: 09/27/2018] [Indexed: 05/26/2023]
Abstract
Acclimation is a process of adjustment to gradual environmental change that enables plants to survive further stress by triggering some tolerance mechanism possibly involving ABA, ROS and oxidative metabolism. Here we have studied acclimation responses in terms of the performances with regard to physiological (growth and relative water content) and biochemical (chlorophyll, carotenoids, protein, malondialdehyde, sugar content) attributes, ABA production and stomatal sensitivity to exogenous ABA, extracellular ROS production and activation of antioxidant system. Our study reveals that repeated exposure to short-term mild water stress simulated by polyethylene glycol (PEG-6000) induces acclimation in mung bean (Vigna radiata L. Wilczek) seedlings. Acclimation induced tolerance was associated with reduced leaf size and enhanced root growth, accumulation of soluble sugar as osmoprotectant, maintenance of water potential, lessening of membrane damage as indicated by lower MDA content. Acclimated mung bean seedlings have shown greater degree of tolerance through increased production of and enhanced sensitivity to ABA (as reflected by faster stomatal closure), enhanced production of extracellular O2.- and H2O2 and the elevated activities of antioxidative enzymes to control the oxidative burst. Taken together, the results convey that acclimated seedlings minimize osmotic stress-induced damage through a possible network of ABA, ROS and antioxidants.
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Affiliation(s)
- Moumita Sahu
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Visva-Bharati University, Santiniketan, 731 235, West Bengal, India
| | - Rup Kumar Kar
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Visva-Bharati University, Santiniketan, 731 235, West Bengal, India.
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152
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Qi J, Song CP, Wang B, Zhou J, Kangasjärvi J, Zhu JK, Gong Z. Reactive oxygen species signaling and stomatal movement in plant responses to drought stress and pathogen attack. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2018; 60:805-826. [PMID: 29660240 DOI: 10.1111/jipb.12654] [Citation(s) in RCA: 295] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 04/08/2018] [Indexed: 05/18/2023]
Abstract
Stomata, the pores formed by a pair of guard cells, are the main gateways for water transpiration and photosynthetic CO2 exchange, as well as pathogen invasion in land plants. Guard cell movement is regulated by a combination of environmental factors, including water status, light, CO2 levels and pathogen attack, as well as endogenous signals, such as abscisic acid and apoplastic reactive oxygen species (ROS). Under abiotic and biotic stress conditions, extracellular ROS are mainly produced by plasma membrane-localized NADPH oxidases, whereas intracellular ROS are produced in multiple organelles. These ROS form a sophisticated cellular signaling network, with the accumulation of apoplastic ROS an early hallmark of stomatal movement. Here, we review recent progress in understanding the molecular mechanisms of the ROS signaling network, primarily during drought stress and pathogen attack. We summarize the roles of apoplastic ROS in regulating stomatal movement, ABA and CO2 signaling, and immunity responses. Finally, we discuss ROS accumulation and communication between organelles and cells. This information provides a conceptual framework for understanding how ROS signaling is integrated with various signaling pathways during plant responses to abiotic and biotic stress stimuli.
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Affiliation(s)
- Junsheng Qi
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Chun-Peng Song
- Collaborative Innovation Center of Crop Stress Biology, Henan Province, Institute of Plant Stress Biology, Henan University, Kaifeng 475001, China
| | - Baoshan Wang
- Key Lab of Plant Stress Research, College of Life Science, Shandong Normal University, Ji'nan 250000, China
| | - Jianmin Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jaakko Kangasjärvi
- Division of Plant Biology, Viikki Plant Science Centre, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
| | - Jian-Kang Zhu
- Shanghai Center for Plant Stress Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907, USA
| | - Zhizhong Gong
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
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153
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He F, Wang H, Li H, Su Y, Li S, Yang Y, Feng C, Yin W, Xia X. PeCHYR1, a ubiquitin E3 ligase from Populus euphratica, enhances drought tolerance via ABA-induced stomatal closure by ROS production in Populus. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1514-1528. [PMID: 29406575 PMCID: PMC6041450 DOI: 10.1111/pbi.12893] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 12/28/2017] [Accepted: 01/28/2018] [Indexed: 05/11/2023]
Abstract
Drought, a primary abiotic stress, seriously affects plant growth and productivity. Stomata play a vital role in regulating gas exchange and drought adaptation. However, limited knowledge exists of the molecular mechanisms underlying stomatal movement in trees. Here, PeCHYR1, a ubiquitin E3 ligase, was isolated from Populus euphratica, a model of stress adaptation in forest trees. PeCHYR1 was preferentially expressed in young leaves and was significantly induced by ABA (abscisic acid) and dehydration treatments. To study the potential biological functions of PeCHYR1, transgenic poplar 84K (Populus alba × Populus glandulosa) plants overexpressing PeCHYR1 were generated. PeCHYR1 overexpression significantly enhanced H2 O2 production and reduced stomatal aperture. Transgenic lines exhibited increased sensitivity to exogenous ABA and greater drought tolerance than that of WT (wild-type) controls. Moreover, up-regulation of PeCHYR1 promoted stomatal closure and decreased transpiration, resulting in strongly elevated WUE (water use efficiency). When exposed to drought stress, transgenic poplar maintained higher photosynthetic activity and biomass accumulation. Taken together, these results suggest that PeCHYR1 plays a crucial role in enhancing drought tolerance via ABA-induced stomatal closure caused by hydrogen peroxide (H2 O2 ) production in transgenic poplar plants.
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Affiliation(s)
- Fang He
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Hou‐Ling Wang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Hui‐Guang Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Yanyan Su
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Shuang Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Yanli Yang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Cong‐Hua Feng
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Weilun Yin
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
| | - Xinli Xia
- Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijingChina
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154
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Lv X, Li H, Chen X, Xiang X, Guo Z, Yu J, Zhou Y. The role of calcium-dependent protein kinase in hydrogen peroxide, nitric oxide and ABA-dependent cold acclimation. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:4127-4139. [PMID: 29868714 PMCID: PMC6054180 DOI: 10.1093/jxb/ery212] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/25/2018] [Indexed: 05/18/2023]
Abstract
Cold acclimation-induced cold tolerance is associated with the generation of reactive oxygen species (ROS), nitric oxide (NO), and mitogen-activated protein kinases (MPKs) in plants. Here, we hypothesized that calcium-dependent protein kinases (CPKs) induce a crosstalk among ROS, NO, and MPKs, leading to the activation of abscisic acid (ABA) signaling in plant adaptation to cold stress. Results showed that cold acclimation significantly increased the transcript levels of CPK27 along with the biosynthesis of ABA in tomato (Solanum lycopersicum). Silencing of CPK27 compromised acclimation-induced cold tolerance, generation of hydrogen peroxide (H2O2) in the apoplast, NO and ABA accumulation, and the activation of MPK1/2. Crosstalk among H2O2, NO, and MPK1/2 contributes to the homeostasis of H2O2 and NO, activation of MPK1/2, and cold tolerance. ABA is also critical for CPK27-induced cold tolerance, generation of H2O2 and NO, and the activation of MPK1/2. These results strongly suggest that CPK27 may function as a positive regulator of ABA generation by activating the production of ROS and NO as well as MPK1/2 in cold adaptation.
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Affiliation(s)
- Xiangzhang Lv
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Huizi Li
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Xiaoxiao Chen
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Xun Xiang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Zhixin Guo
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
| | - Jingquan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou, P.R. China
| | - Yanhong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, P.R. China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou, P.R. China
- Correspondence:
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155
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Sampaio Filho IDJ, Jardine KJ, de Oliveira RCA, Gimenez BO, Cobello LO, Piva LRDO, Candido LA, Higuchi N, Chambers JQ. Below versus above Ground Plant Sources of Abscisic Acid (ABA) at the Heart of Tropical Forest Response to Warming. Int J Mol Sci 2018; 19:E2023. [PMID: 30002274 PMCID: PMC6073271 DOI: 10.3390/ijms19072023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 07/04/2018] [Accepted: 07/06/2018] [Indexed: 11/26/2022] Open
Abstract
Warming surface temperatures and increasing frequency and duration of widespread droughts threaten the health of natural forests and agricultural crops. High temperatures (HT) and intense droughts can lead to the excessive plant water loss and the accumulation of reactive oxygen species (ROS) resulting in extensive physical and oxidative damage to sensitive plant components including photosynthetic membranes. ROS signaling is tightly integrated with signaling mechanisms of the potent phytohormone abscisic acid (ABA), which stimulates stomatal closure leading to a reduction in transpiration and net photosynthesis, alters hydraulic conductivities, and activates defense gene expression including antioxidant systems. While generally assumed to be produced in roots and transported to shoots following drought stress, recent evidence suggests that a large fraction of plant ABA is produced in leaves via the isoprenoid pathway. Thus, through stomatal regulation and stress signaling which alters water and carbon fluxes, we highlight the fact that ABA lies at the heart of the Carbon-Water-ROS Nexus of plant response to HT and drought stress. We discuss the current state of knowledge of ABA biosynthesis, transport, and degradation and the role of ABA and other isoprenoids in the oxidative stress response. We discuss potential variations in ABA production and stomatal sensitivity among different plant functional types including isohydric/anisohydric and pioneer/climax tree species. We describe experiments that would demonstrate the possibility of a direct energetic and carbon link between leaf ABA biosynthesis and photosynthesis, and discuss the potential for a positive feedback between leaf warming and enhanced ABA production together with reduced stomatal conductance and transpiration. Finally, we propose a new modeling framework to capture these interactions. We conclude by discussing the importance of ABA in diverse tropical ecosystems through increases in the thermotolerance of photosynthesis to drought and heat stress, and the global importance of these mechanisms to carbon and water cycling under climate change scenarios.
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Affiliation(s)
- Israel de Jesus Sampaio Filho
- National Institute for Amazon Research (INPA), Ave. Andre Araujo 2936, Campus II, Building LBA, Manaus, AM 69080-97, Brazil.
| | - Kolby Jeremiah Jardine
- National Institute for Amazon Research (INPA), Ave. Andre Araujo 2936, Campus II, Building LBA, Manaus, AM 69080-97, Brazil.
- Climate Science Department, Earth Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Rd., Building 64-241, Berkeley, CA 94720, USA.
| | | | - Bruno Oliva Gimenez
- National Institute for Amazon Research (INPA), Ave. Andre Araujo 2936, Campus II, Building LBA, Manaus, AM 69080-97, Brazil.
| | - Leticia Oliveira Cobello
- National Institute for Amazon Research (INPA), Ave. Andre Araujo 2936, Campus II, Building LBA, Manaus, AM 69080-97, Brazil.
| | - Luani Rosa de Oliveira Piva
- Federal University of Paraná (UFPR), Ave. Pref. Lothario Meissner 632, Campus III, Forest Sciences Department, Curitiba, PR 80210-170, Brazil.
| | - Luiz Antonio Candido
- National Institute for Amazon Research (INPA), Ave. Andre Araujo 2936, Campus II, Building LBA, Manaus, AM 69080-97, Brazil.
| | - Niro Higuchi
- National Institute for Amazon Research (INPA), Ave. Andre Araujo 2936, Campus II, Building LBA, Manaus, AM 69080-97, Brazil.
| | - Jeffrey Quintin Chambers
- National Institute for Amazon Research (INPA), Ave. Andre Araujo 2936, Campus II, Building LBA, Manaus, AM 69080-97, Brazil.
- Climate Science Department, Earth Science Division, Lawrence Berkeley National Laboratory, One Cyclotron Rd., Building 64-241, Berkeley, CA 94720, USA.
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156
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Su T, Wang P, Li H, Zhao Y, Lu Y, Dai P, Ren T, Wang X, Li X, Shao Q, Zhao D, Zhao Y, Ma C. The Arabidopsis catalase triple mutant reveals important roles of catalases and peroxisome-derived signaling in plant development. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2018; 60:591-607. [PMID: 29575603 DOI: 10.1111/jipb.12649] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 03/19/2018] [Indexed: 05/25/2023]
Abstract
Hydrogen peroxide (H2 O2 ) is generated in many metabolic processes. As a signaling molecule, H2 O2 plays important roles in plant growth and development, as well as environmental stress response. In Arabidopsis, there are three catalase genes, CAT1, CAT2, and CAT3. The encoded catalases are predominately peroxisomal proteins and are critical for scavenging H2 O2 . Since CAT1 and CAT3 are linked on chromosome 1, it has been almost impossible to generate cat1/3 and cat1/2/3 mutants by traditional genetic tools. In this study, we constructed cat1/3 double mutants and cat1/2/3 triple mutants by CRISPR/Cas9 to investigate the role of catalases. The cat1/2/3 triple mutants displayed severe redox disturbance and growth defects under physiological conditions compared with wild-type and the cat2/3 double mutants. Transcriptome analysis showed a more profound transcriptional response in the cat1/2/3 triple mutants compared to the cat2/3 mutants. These differentially expressed genes are involved in plant growth regulation as well as abiotic and biotic stress responses. In addition, expression of OXI1 (OXIDATIVE SIGNAL INDUCIBLE 1) and several MAPK cascade genes were changed dramatically in the catalase triple mutant, suggesting that H2 O2 produced in peroxisomes could serve as a peroxisomal retrograde signal.
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Affiliation(s)
- Tong Su
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Pingping Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Huijuan Li
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Yiwu Zhao
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Yao Lu
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Peng Dai
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Tianqi Ren
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Xiaofeng Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Xuezhi Li
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Qun Shao
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Dazhong Zhao
- Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
| | - Yanxiu Zhao
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Changle Ma
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
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157
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Moles TM, Mariotti L, De Pedro LF, Guglielminetti L, Picciarelli P, Scartazza A. Drought induced changes of leaf-to-root relationships in two tomato genotypes. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 128:24-31. [PMID: 29751252 DOI: 10.1016/j.plaphy.2018.05.008] [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] [Received: 02/26/2018] [Revised: 04/23/2018] [Accepted: 05/04/2018] [Indexed: 05/14/2023]
Abstract
Water deficit triggers a dynamic and integrated cross-talk between leaves and roots. Tolerant plants have developed several physiological and molecular mechanisms to establish new cell metabolism homeostasis, avoiding and/or escaping from permanent impairments triggered by drought. Two tomato genotypes (a Southern Italy landrace called Ciettaicale and the well-known commercial cultivar Moneymaker) were investigated at vegetative stage to assess leaf and root metabolic strategies under 20 days of water deficit. Physiological and metabolic changes, in terms of ABA, IAA, proline, soluble sugars and phenols contents, occurred in both tomato genotypes under water stress. Overall, our results pointed out the higher plasticity of Ciettaicale to manage plant water status under drought in order to preserve the source-sink relationships. This aim was achieved by maintaining a more efficient leaf photosystem II (PSII) photochemistry, as suggested by chlorophyll fluorescence parameters, associated with a major investment towards root growth and activity to improve water uptake. On the contrary, the higher accumulation of carbon compounds, resulting from reduced PSII photochemistry and enhanced starch reserve mobilization, in leaves and roots of Moneymaker under drought could play a key role in the osmotic adjustment, although causing a feedback disruption of the source-sink relations. This hypothesis was also supported by the different drought-induced redox unbalance, as suggested by H2O2 and MDA contents. This could affect both PSII photochemistry and root activity, leading to a major involvement of NPQ and antioxidant system in response to drought in Moneymaker than Ciettaicale.
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Affiliation(s)
| | - Lorenzo Mariotti
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | | | - Lorenzo Guglielminetti
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy; Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, Pisa, Italy.
| | - Piero Picciarelli
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy; Interdepartmental Research Center Nutrafood-Nutraceuticals and Food for Health, University of Pisa, Pisa, Italy
| | - Andrea Scartazza
- Institute of Agro-environmental and Forest Biology, National Research Council, Monterotondo Scalo, RM, Italy
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158
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Liu J, Sun X, Xu F, Zhang Y, Zhang Q, Miao R, Zhang J, Liang J, Xu W. Suppression of OsMDHAR4 enhances heat tolerance by mediating H 2O 2-induced stomatal closure in rice plants. RICE (NEW YORK, N.Y.) 2018; 11:38. [PMID: 29951703 PMCID: PMC6021276 DOI: 10.1186/s12284-018-0230-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 06/19/2018] [Indexed: 05/07/2023]
Abstract
BACKGROUND Monodehydroascorbate reductase (MDAR or MDHAR), which is responsible for growth, development and stress response in plants, is a key enzyme in the maintenance of the ascorbate acid (AsA) pool through the AsA-glutathione (AsA-GSH) cycle. High temperature affects a broad spectrum of cellular components and metabolism including AsA-GSH cycle in plants. In rice, however, the detailed roles of OsMDHAR4 in resistance against heat stress remains unclear. RESULTS Here, we report that OsMDHAR4 protein was localized to the chloroplasts. OsMDHAR4 expression was detected in all tissues surveyed and peaked in leaf blade. OsMDHAR4 was responsive to multiple stresses and was relatively strongly induced by heat treatment. In comparison with wild type, the osmdhar4 mutant exhibited improved tolerance to heat stress, whereas OsMDHAR4 overexpression lines exhibited enhanced sensitivity to heat stress. Moreover, we found that suppression of OsMDHAR4 promoted stomatal closure and hydrogen peroxide accumulation, and overexpression of OsMDHAR4 increased stomatal opening and decreased hydrogen peroxide content in rice leaves. CONCLUSIONS Taken together, these results indicated that OsMDHAR4 negatively regulates tolerance to heat stress by mediating H2O2-induced stomatal closure in rice.
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Affiliation(s)
- Jianping Liu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Jinshan Fuzhou, 350002, China
| | - Xinjiao Sun
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Jinshan Fuzhou, 350002, China
| | - Feiyun Xu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Jinshan Fuzhou, 350002, China
| | - Yingjiao Zhang
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Jinshan Fuzhou, 350002, China
| | - Qian Zhang
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Jinshan Fuzhou, 350002, China
| | - Rui Miao
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Jinshan Fuzhou, 350002, China
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, Hong Kong, China.
| | - Jiansheng Liang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Weifeng Xu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Jinshan Fuzhou, 350002, China.
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159
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Qiao F, Zhang XM, Liu X, Chen J, Hu WJ, Liu TW, Liu JY, Zhu CQ, Ghoto K, Zhu XY, Zheng HL. Elevated nitrogen metabolism and nitric oxide production are involved in Arabidopsis resistance to acid rain. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 127:238-247. [PMID: 29621720 DOI: 10.1016/j.plaphy.2018.03.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 03/19/2018] [Accepted: 03/21/2018] [Indexed: 05/16/2023]
Abstract
Acid rain (AR) can induce great damages to plants and could be classified into different types according to the different SO42-/NO3- ratio. However, the mechanism of plants' responding to different types of AR has not been elucidated clearly. Here, we found that nitric-rich simulated AR (N-SiAR) induced less leaves injury as lower necrosis percentage, better physiological parameters and reduced oxidative damage in the leaves of N-SiAR treated Arabidopsis thaliana compared with sulfate and nitrate mixed (SN-SiAR) or sulfuric-rich (S-SiAR) simulated AR treated ones. Of these three types of SiAR, N-SiAR treated Arabidopsis maintained the highest of nitrogen (N) content, nitrate reductase (NR) and nitrite reductase (NiR) activity as well as N metabolism related genes expression level. Nitric oxide (NO) content showed that N-SiAR treated seedlings had a higher NO level compared to SN-SiAR or S-SiAR treated ones. A series of NO production and elimination related reagents and three NO production-related mutants were used to further confirm the role of NO in regulating acid rain resistance in N-SiAR treated Arabidopsis seedlings. Taken together, we concluded that an elevated N metabolism and enhanced NO production are involved in the tolerance to different types of AR in Arabidopsis.
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Affiliation(s)
- Fang Qiao
- School of Life Sciences, East China Normal University, Shanghai, 200241, PR China; Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Xi-Min Zhang
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China; Key Laboratory of Plant Physiology and Development Regulation, School of Life Science, Guizhou Normal University, Guiyang, Guizhou 550001, PR China
| | - Xiang Liu
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Juan Chen
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Wen-Jun Hu
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Ting-Wu Liu
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Ji-Yun Liu
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Chun-Quan Zhu
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Kabir Ghoto
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Xue-Yi Zhu
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Hai-Lei Zheng
- Key Laboratory of the Coastal and Wetland Ecosystems of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China.
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Zou LJ, Deng XG, Zhang LE, Zhu T, Tan WR, Muhammad A, Zhu LJ, Zhang C, Zhang DW, Lin HH. Nitric oxide as a signaling molecule in brassinosteroid-mediated virus resistance to Cucumber mosaic virus in Arabidopsis thaliana. PHYSIOLOGIA PLANTARUM 2018; 163:196-210. [PMID: 29215737 DOI: 10.1111/ppl.12677] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 12/04/2017] [Accepted: 12/05/2017] [Indexed: 06/07/2023]
Abstract
Brassinosteroids (BRs) are growth-promoting plant hormones that play a crucial role in biotic stress responses. Here, we found that BR treatment increased nitric oxide (NO) accumulation, and a significant reduction of virus accumulation in Arabidopsis thaliana. However, the plants pre-treated with NO scavenger [2-(4-carboxyphenyl)-4,4,5,5-tetramethyl-imidazoline-1-1-oxyl-3-oxide (PTIO)] or nitrate reductase (NR) inhibitor (tungstate) hardly had any NO generation and appeared to have the highest viral replication and suffer more damages. Furthermore, the antioxidant system and photosystem parameters were up-regulated in brassinolide (BL)-treated plants but down regulated in PTIO- or tungstate-treated plants, suggesting NO may be involved in BRs-induced virus resistance in Arabidopsis. Further evidence showed that NIA1 pathway was responsible for BR-induced NO accumulation in Arabidopsis. These results indicated that NO participated in the BRs-induced systemic resistance in Arabidopsis. As BL treatment could not increase NO levels in nia1 plants in comparison to nia2 plants. And nia1 mutant exhibited decreased virus resistance relative to Col-0 or nia2 plants after BL treatment. Taken together, our study addressed that NIA1-mediated NO biosynthesis is involved in BRs-mediated virus resistance in A. thaliana.
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Affiliation(s)
- Li-Juan Zou
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
- Ecological Security and Protection Key Laboratory of Sichuan Province and Life Science and Technology College, Mianyang Normal University, Mianyang, 621000, China
| | - Xing-Guang Deng
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
| | - Li-E Zhang
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
| | - Tong Zhu
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
| | - Wen-Rong Tan
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
| | - Arfan Muhammad
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
| | - Li-Jun Zhu
- Ecological Security and Protection Key Laboratory of Sichuan Province and Life Science and Technology College, Mianyang Normal University, Mianyang, 621000, China
| | - Chao Zhang
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
| | - Da-Wei Zhang
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
| | - Hong-Hui Lin
- Ministry of Education Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, Sichuan University, Chengdu, 610064, China
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161
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Sun H, Feng F, Liu J, Zhao Q. Nitric Oxide Affects Rice Root Growth by Regulating Auxin Transport Under Nitrate Supply. FRONTIERS IN PLANT SCIENCE 2018; 9:659. [PMID: 29875779 PMCID: PMC5974057 DOI: 10.3389/fpls.2018.00659] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 04/30/2018] [Indexed: 05/08/2023]
Abstract
Nitrogen (N) is a major essential nutrient for plant growth, and rice is an important food crop globally. Although ammonium (NH4+) is the main N source for rice, nitrate (NO3-) is also absorbed and utilized. Rice responds to NO3- supply by changing root morphology. However, the mechanisms of rice root growth and formation under NO3- supply are unclear. Nitric oxide (NO) and auxin are important regulators of root growth and development under NO3- supply. How the interactions between NO and auxin in regulating root growth in response to NO3- are unknown. In this study, the levels of indole-3-acetic acid (IAA) and NO in roots, and the responses of lateral roots (LRs) and seminal roots (SRs) to NH4+ and NO3-, were investigated using wild-type (WT) rice, as well as osnia2 and ospin1b mutants. NO3- supply promoted LR formation and SR elongation. The effects of NO donor and NO inhibitor/scavenger supply on NO levels and the root morphology of WT and nia2 mutants under NH4+ or NO3- suggest that NO3--induced NO is generated by the nitrate reductase (NR) pathway rather than the NO synthase (NOS)-like pathway. IAA levels, [3H] IAA transport, and PIN gene expression in roots were enhanced under NO3- relative to NH4+ supply. These results suggest that NO3- regulates auxin transport in roots. Application of SNP under NH4+ supply, or of cPTIO under NO3- supply, resulted in auxin levels in roots similar to those under NO3- and NH4+ supply, respectively. Compared to WT, the roots of the ospin1b mutant had lower auxin levels, fewer LRs, and shorter SRs. Thus, NO affects root growth by regulating auxin transport in response to NO3-. Overall, our findings suggest that NO3- influences LR formation and SR elongation by regulating auxin transport via a mechanism involving NO.
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Affiliation(s)
- Huwei Sun
- *Correspondence: Huwei Sun, Quanzhi Zhao,
| | | | | | - Quanzhi Zhao
- Laboratory of Rice Biology in Henan Province, Collaborative Innovation Center of Henan Grain Crops, College of Agronomy, Henan Agricultural University, Zhengzhou, China
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162
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Chen Z, Gu Q, Yu X, Huang L, Xu S, Wang R, Shen W, Shen W. Hydrogen peroxide acts downstream of melatonin to induce lateral root formation. ANNALS OF BOTANY 2018; 121:1127-1136. [PMID: 29325001 PMCID: PMC5946926 DOI: 10.1093/aob/mcx207] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 12/14/2017] [Indexed: 05/21/2023]
Abstract
BACKGROUND AND AIMS Although several studies have confirmed the beneficial roles of exogenous melatonin in lateral root (LR) formation, the molecular mechanism is still elusive. Here, the role of hydrogen peroxide (H2O2) in the induction of LR formation triggered by melatonin was investigated. METHODS Alfalfa (Medicago sativa 'Biaogan') and transgenic Arabidopsis seedlings were treated with or without melatonin, diphenyleneiodonium (DPI, NADPH oxidase inhibitor), N,N'-dimethylthiourea (DMTU, H2O2 scavenger), alone or combined. Then, H2O2 content was determined with 2',7'-dichlorofluorescein diacetate (H2DCFDA)-dependent fluorescence and spectrophotography. Transcript levels of cell cycle regulatory genes were analysed by real-time reverse transcription-PCR. KEY RESULTS Application of exogenous melatonin not only increased endogenous H2O2 content but also induced LR formation in alfalfa seedlings. Consistently, melatonin-induced LR primordia exhibited an accelerated response. These inducible responses were significantly blocked when DPI or DMTU was applied. Compared with the wild-type, transgenic Arabidopsis plants overexpressing alfalfa MsSNAT (a melatonin synthesis gene) increased H2O2 accumulation and thereafter LR formation, both of which were blocked by DPI or DMTU. Similarly, melatonin-modulated expression of marker genes responsible for LR formation, including MsCDKB1;1, MsCDKB2;1, AtCDKB1;1 and AtCDKB2;1, was obviously impaired by the removal of H2O2 in both alfalfa and transgenic Arabidopsis plants. CONCLUSIONS Pharmacological and genetic evidence revealed that endogenous melatonin-triggered LR formation was H2O2-dependent.
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Affiliation(s)
- Ziping Chen
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Quan Gu
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Xiuli Yu
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Liqin Huang
- College of Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Sheng Xu
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing, P.R. China
| | - Ren Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing, P.R. China
| | - Wei Shen
- College of Sciences, Nanjing Agricultural University, Nanjing, P.R. China
| | - Wenbiao Shen
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, P.R. China
- For correspondence. E-mail:
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163
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Huang L, Zhang M, Jia J, Zhao X, Huang X, Ji E, Ni L, Jiang M. An Atypical Late Embryogenesis Abundant Protein OsLEA5 Plays a Positive Role in ABA-Induced Antioxidant Defense in Oryza sativa L. PLANT & CELL PHYSIOLOGY 2018; 59:916-929. [PMID: 29432551 DOI: 10.1093/pcp/pcy035] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 02/05/2018] [Indexed: 05/21/2023]
Abstract
OsLEA5 acts as a co-regulator of a transcriptional fact ZFP36 to enhance the expression and the activity of ascorbate peroxidase OsAPX1 to regulate seed germination in rice, but it it unknown whether OsLEA5 is also crucial in plant seedlings under stress conditions. To determine this, we generated OsLEA5 overexpression and knockdown rice plants. We found that overexpression of OsLEA5 in rice plants enhanced the tolerance to drought and salt stress; in contrast, an RNA interference (RNAi) mutant of OsLEA5 rice plants was more sensitive to drought and salinity. Further investigation found that various stimuli and ABA could induce OsLEA5 expression, and OsLEA5 acted downstream of ZFP36 to be involved in ABA-induced generation of hydrogen peroxide (H2O2), and the regulation of the expression and the activities of antioxidant defense enzymes in plants leaves, and OsLEA5 contributed to stabilize ZFP36. Additionally, OsLEA5 participates in the accumulation of ABA by up-regulating ABA biosynthesis genes and down-regulating ABA metabolism genes. Moreover, we found that two homologs of OsLEA5 (5C700, short for Os05g0526700; and 5C300, short for Os05g0584300) which were induced by ABA also interacted with ZFP36 separately; interestingly, the nuclear-located 5C700 could also act as a co-activator of ZFP36 to modulate OsAPX1, while 5C300 which was down-regulated by ABA induction acted as an ABA-induced inhibitor of ZFP36 to regulate OsAPX1. Hence, our conclusion is that OsLEA5 participates in the ABA-mediated antioxidant defense to function in drought and salt stress response in rice, and the 5C subgroup of LEAs contribute by acting as co-regulators of the transcription factor ZFP36.
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Affiliation(s)
- Liping Huang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
| | - MengYao Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jing Jia
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xixi Zhao
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xingxiu Huang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
| | - E Ji
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Lan Ni
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Mingyi Jiang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, PR China
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164
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Jakubowicz M, Nowak W, Gałgański Ł, Babula-Skowrońska D. Expression profiling of genes encoding ABA route components in response to dehydration or various light conditions in poplar buds and leaves. JOURNAL OF PLANT PHYSIOLOGY 2018; 223:84-95. [PMID: 29554558 DOI: 10.1016/j.jplph.2018.01.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 01/15/2018] [Accepted: 01/16/2018] [Indexed: 06/08/2023]
Abstract
In this report, the members of PP2C, SnRK2a and Rboh oxidase families from Arabidopsis and poplar were studied in silico, and the expression profiles of the some of them were specified in Populus tremula buds and adult leaves. In poplars, the counterparts of ABI1- and ABI2-like protein phosphatases are lacking, but poplar genomes encode three HAB-like proteins denoted in this work as HAB1, HAB3a and HAB3b, and the counterparts of the two latter ones are absent in Arabidopsis. Nonetheless, they may be present in other species. In poplars, SnRK2 subclass III includes two SnRK2.6-like protein kinases denoted by us as SnRK2.6a and SnRK2.6b, and only one SnRK2.2 corresponding to SnRK2.2 and SnRK2.3 ones from Arabidopsis. In contrast to Arabidopsis, the poplar Rboh family involves two RbohD- and RbohF-like proteins denoted here as RbohD1 and RbohD2, and RbohF1 and RbohF2, respectively. The expressions of genes encoding the above components of the ABA route were studied in Populus tremula dehydrated buds and adult leaves not subjected to stress but exposed to natural daylight or to darkness, and to inhibition of ethylene biosynthesis or signaling route by cobalt or silver ions, respectively. In leaves, the light conditions seemed to be the most pronounced factor, from among the studied stimuli, controlling the expression Ptre-HAB3a, Ptre-HAB1, Ptre-SnRK2.6a and Ptre-RbohF2 genes, their expression was upregulated in darkness. This observation implies that these genes may be important for dark-induced stomatal closure regulation. Ethylene negatively affected the expression of three studied Rboh genes and Ptre-HAB1one but only at daylight, whereas its positive effect on the of Ptre-HAB3a was shown in the dark exposed leaves. In buds, three studied Rboh genes took part in the early response to dehydration, however their participation involved the visibly highest level of the Ptre-RbohD1 transcripts, followed by Ptre-RbohF2 and the lowest one of Ptre-RbohF1. Nonetheless, the further stress-induced superoxide anion generation seemed to depend on the enhanced expression of the Ptre-RbohD1 and Ptre-RbohF2 genes only, still with a significantly higher level of the Ptre-RbohD1 one. Ptre-RbohD2 transcripts were found neither in leaves nor in buds. The expression of the other genes discussed in the present work was either slightly upregulated at moderate stress or did not significantly change in response to dehydration. The protein kinase activity of overexpressed Ptre-SnRK2.6a and Ptre-SnRK2.6b was confirmed in in vitro protein kinase assay and compared to that of SnRK2.6/OST1 one from Arabidopsis.
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Affiliation(s)
- Małgorzata Jakubowicz
- Department of Genome Biology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland.
| | - Witold Nowak
- Molecular Biology Techniques Laboratory, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland
| | - Łukasz Gałgański
- Department of Genome Biology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland; Department of Molecular Biomedicine, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
| | - Danuta Babula-Skowrońska
- Department of Environmental Stress Biology, Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland
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165
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Li Y, Xu S, Wang Z, He L, Xu K, Wang G. Glucose triggers stomatal closure mediated by basal signaling through HXK1 and PYR/RCAR receptors in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:1471-1484. [PMID: 29444316 PMCID: PMC5888972 DOI: 10.1093/jxb/ery024] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 01/11/2018] [Indexed: 05/04/2023]
Abstract
Sugars play important roles in regulating plant growth, development, and stomatal movement. Here, we found that glucose triggered stomatal closure in a dose- and time-dependent manner in Arabidopsis. Pharmacological data showed that glucose-induced stomatal closure was greatly inhibited by catalase [CAT; a reactive oxygen species (ROS) scavenger], diphenyleneiodonium chloride (DPI; an NADPH oxidase inhibitor), lanthanum chloride (LaCl3; a Ca2+ channel blocker), EGTA (a Ca2+ chelator), and two nitrate reductase (NR) inhibitors, tungstate and sodium azide (NaN3), while it was not affected by salicylhydroxamic acid (SHAM; a peroxidase inhibitor). Moreover, glucose induced ROS and nitric oxide (NO) production in guard cells of Arabidopsis. The ROS production was almost completely removed by CAT, strongly restricted by DPI, and was not affected by SHAM. NO production was partially suppressed by tungstate and NaN3, and the levels of NO were significantly reduced in the nia1-1nia2-5 mutant. Additionally, glucose-triggered stomatal closure was significantly impaired in gin1-1, gin2-1, pyr1pyl1pyl2pyl4, abi1-1, ost1, slac1-4, cpk6-1, and nia1-1nia2-5 mutants. Likewise, the reductions in leaf stomatal conductance (gs) and transpiration rate (E) caused by glucose were reversed in the above mutants. These results suggest that glucose-triggered stomatal closure may be dependent on basal signaling through PYR/RCAR receptors and hexokinase1 (HXK1).
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Affiliation(s)
- Yan Li
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Shanshan Xu
- Natural History Research Center, Shanghai Natural History Museum, Branch of Shanghai Science & Technology Museum, Shanghai, China
| | - Zhiwei Wang
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Lingchao He
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Kang Xu
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Genxuan Wang
- Institute of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, China
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166
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He H, Yang Q, Shen B, Zhang S, Peng X. OsNOA1 functions in a threshold-dependent manner to regulate chloroplast proteins in rice at lower temperatures. BMC PLANT BIOLOGY 2018; 18:44. [PMID: 29548275 PMCID: PMC5857130 DOI: 10.1186/s12870-018-1258-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 03/01/2018] [Indexed: 05/22/2023]
Abstract
BACKGROUND Although decreased protein expressions have been observed in NOA1 (Nitric Oxide Associated protein 1) deficient plants, the molecular mechanisms of how NOA1 regulates protein metabolism remain poorly understood. In this study, we have used a global comparative proteomic approach for both OsNOA1 suppression and overexpression transgenic lines under two different temperatures, in combination with physiological and biochemical analyses to explore the regulatory mechanisms of OsNOA1 in rice. RESULTS In OsNOA1-silenced or highly overexpressed rice, considerably different expression patterns of both chlorophyll and Rubisco as well as distinct phenotypes were observed between the growth temperatures at 22 °C and 30 °C. These observations led us to hypothesize there appears a narrow abundance threshold for OsNOA1 to function properly at lower temperatures, while higher temperatures seem to partially compensate for the changes of OsNOA1 abundance. Quantitative proteomic analyses revealed higher temperatures could restore 90% of the suppressed proteins to normal levels, whereas almost all of the remaining suppressed proteins were chloroplast ribosomal proteins. Additionally, our data showed 90% of the suppressed proteins in both types of transgenic plants at lower temperatures were located in the chloroplast, suggesting a primary effect of OsNOA1 on chloroplast proteins. Transcript analyses, along with in vitro pull-down experiments further demonstrated OsNOA1 is associated with the function of chloroplast ribosomes. CONCLUSIONS Our results suggest OsNOA1 functions in a threshold-dependent manner for regulation of chloroplast proteins at lower temperatures, which may be mediated by interactions between OsNOA1 and chloroplast ribosomes.
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Affiliation(s)
- Han He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, China
| | - Qiaosong Yang
- Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Boran Shen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, China
| | - Sheng Zhang
- Institute of Biotechnology, Cornell University, Ithaca, USA
| | - Xinxiang Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, China
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167
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Janicka MG, Reda MG, Czy Ewska K, Kaba A K. Involvement of signalling molecules NO, H 2O 2 and H 2S in modification of plasma membrane proton pump in cucumber roots subjected to salt or low temperature stress. FUNCTIONAL PLANT BIOLOGY : FPB 2018; 45:428-439. [PMID: 32290982 DOI: 10.1071/fp17095] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 10/20/2017] [Indexed: 05/27/2023]
Abstract
In the present study we demonstrate that the signalling molecules NO, H2O2 and H2S are important for understanding the mechanisms of modification of plasma membrane H+-ATPase (EC 3.6.3.14) activity in conditions of both salt (50mM NaCl) and low temperature (10°C, LT) stress. Plants were subjected to stress conditions for 1 or 6 days. After 3 days of exposure to stress some of the plants were transferred to control conditions for another 3 days: post-stressed plants (3+3). We measured the endogenous levels of signalling molecules in stressed plants. To determine the physiological significance of NO, H2O2 and H2S induced activity of plasma membrane H+-ATPase (PM H+-ATPase) in salt and LT stresses, we investigated the activity of the plasma membrane proton pump in stress conditions, and plants were additionally supplemented with PTIO (a scavenger of NO), ascorbic acid (a scavenger of H2O2) or hypotaurine (a scavenger of H2S). H2S contributed to increased activity of PM H+-ATPase in short-term salt stress (1 day) and in low temperature treated plants (both 6 days and post-stressed plants), by stimulation of expression of several genes encoding isoforms of the plasma membrane proton pump (CsHA2, CsH4, CsH8, CsH9 and CsHA10). In contrast, NO and H2O2 play a minor role in the regulation of ATPase activity at the genetic level, because they significantly increased the expression of only one isoform, CsHA1, the expression level of which was very low in the tissues of the control plants, and additionally they slightly increased the expression of the gene encoding the isoform CsHA2. However, NO plays an important role in stimulation of the plasma membrane proton pumps under salt stress and low temperature. NO participates in post-translational modifications because it leads to increased enzyme phosphorylation and an increased H+/ATP coupling ratio.
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Affiliation(s)
- Ma Gorzata Janicka
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wroc?aw, Kanonia 6/8, 50-328 Wroc?aw, Poland
| | - Ma Gorzata Reda
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wroc?aw, Kanonia 6/8, 50-328 Wroc?aw, Poland
| | - Katarzyna Czy Ewska
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wroc?aw, Kanonia 6/8, 50-328 Wroc?aw, Poland
| | - Katarzyna Kaba A
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wroc?aw, Kanonia 6/8, 50-328 Wroc?aw, Poland
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168
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Singh BN, Dwivedi P, Sarma BK, Singh GS, Singh HB. Trichoderma asperellum T42 Reprograms Tobacco for Enhanced Nitrogen Utilization Efficiency and Plant Growth When Fed with N Nutrients. FRONTIERS IN PLANT SCIENCE 2018; 9:163. [PMID: 29527216 PMCID: PMC5829606 DOI: 10.3389/fpls.2018.00163] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 01/29/2018] [Indexed: 05/29/2023]
Abstract
Trichoderma spp., are saprophytic fungi that can improve plant growth through increased nutrient acquisition and change in the root architecture. In the present study, we demonstrate that Trichoderma asperellum T42 mediate enhancement in host biomass, total nitrogen content, nitric oxide (NO) production and cytosolic Ca2+ accumulation in tobacco. T42 inoculation enhanced lateral root, root hair length, root hair density and root/shoot dry mass in tobacco under deprived nutrients condition. Interestingly, these growth attributes were further elevated in presence of T42 and supplementation of NO3- and NH4+ nutrients to tobacco at 40 and 70 days, particularly in NO3- supplementation, whereas no significant increment was observed in nia30 mutant. In addition, NO production was more in tobacco roots in T42 inoculated plants fed with NO3- nutrient confirming NO generation was dependent on NR pathway. NO3- dependent NO production contributed to increase in lateral root initiation, Ca2+ accumulation and activities of nitrate transporters (NRTs) in tobacco. Higher activities of several NRT genes in response to T42 and N nutrients and suppression of ammonium transporter (AMT1) suggested that induction of high affinity NRTs help NO3- acquisition through roots of tobacco. Among the NRTs NRT2.1 and NRT2.2 were more up-regulated compared to the other NRTs. Addition of sodium nitroprusside (SNP), relative to those supplied with NO3-/NH4+ nutrition and T42 treated plants singly, and with application of NO inhibitor, cPTIO, confirmed the altered NO fluorescence intensity in tobacco roots. Our findings suggest that T42 promoted plant growth significantly ant N content in the tobacco plants grown under N nutrients, notably higher in NO3-, providing insight of the strategy for not only tobacco but probably for other crops as well to adapt to fluctuating nitrate availability in soil.
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Affiliation(s)
- Bansh N. Singh
- Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, India
- Department of Plant Physiology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - Padmanabh Dwivedi
- Department of Plant Physiology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - Birinchi K. Sarma
- Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - Gopal S. Singh
- Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, India
| | - Harikesh B. Singh
- Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
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169
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You C, Liu C, Li Y, Jiang P, Ma Q. Structural and enzymatic analysis of the cytochrome b 5 reductase domain of Ulva prolifera nitrate reductase. Int J Biol Macromol 2018; 111:1175-1182. [PMID: 29371148 DOI: 10.1016/j.ijbiomac.2018.01.140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 01/17/2018] [Accepted: 01/20/2018] [Indexed: 10/18/2022]
Abstract
Rapid accumulations of unattached green macroalgae, referred to as blooms, constitute ecological disasters and occur in many coastal regions. Ulva are a major cause of blooms, owing to their high nitrogen utilization capacity, which requires nitrate reductase (NR) activity; however, molecular characterization of Ulva NR remains lacking. Herein we determined the crystal structure and performed an enzymatic analysis of the cytochrome b5 reductase domain of Ulva prolifera NR (UpCbRNR). The structural analysis revealed an N-terminal FAD-binding domain primarily consisting of six antiparallel β strands, a C-terminal NADH-binding domain forming a Rossmann fold, and a three β-stranded linker region connecting these two domains. The FAD cofactor was located in the cleft between the two domains and interacted primarily with the FAD-binding domain. UpCbRNR shares similarities in overall structure and cofactor interactions with homologs, and its catalytic ability is comparable to that of higher plant CbRNRs. Structure and sequence comparisons of homologs revealed two regions of sequence length variation potentially useful for phylogenetic analysis: one in the FAD-binding domain, specific to U. prolifera, and another in the linker region that may be used to differentiate between plant, fungi, and animal homologs. Our data will facilitate molecular-level understanding of nitrate assimilation in Ulva.
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Affiliation(s)
- Cai You
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Changshui Liu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Yingjie Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Peng Jiang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| | - Qingjun Ma
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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170
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Chen QM, Yu Y, Lin CM, Cui N, Zhao JY, Song TF, Fan HY. Glucohexaose-induced protein phosphatase 2C regulates cell redox status of cucumber seedling. J Biosci 2018. [DOI: 10.1007/s12038-018-9738-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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171
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Reda M, Golicka A, Kabała K, Janicka M. Involvement of NR and PM-NR in NO biosynthesis in cucumber plants subjected to salt stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 267:55-64. [PMID: 29362099 DOI: 10.1016/j.plantsci.2017.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 10/27/2017] [Accepted: 11/08/2017] [Indexed: 06/07/2023]
Abstract
Nitrate reductase (NR) mainly reduces nitrate to nitrite. However, in certain conditions it can reduce nitrite to NO. In plants, a plasma membrane-associated form of NR (PM-NR) is present. It produces NO2- for nitrite NO/reductase (Ni-NOR), which can release NO into the apoplastic space. The effect of 50 mM NaCl on NO formation and the involvement of NR in NO biosynthesis were studied in cucumber seedling roots under salt stress. In salt-stressed roots, the amount of NO was higher than in control. The application of tungstate abolished the increase of NO level in stressed roots, indicating that NR was responsible for NO biosynthesis under the test conditions. The involvement of other molybdoenzymes was excluded using specific inhibitors. Furthermore, higher cNR and PM-NR activities were observed in NaCl-treated roots. The increase in NR activity was due to the stimulation of CsNR genes expression and posttranslational modifications, such as enzyme dephosphorylation. This was confirmed by Western blot analysis. Moreover, the increase of nitrite tissue level in short-term stressed roots and the nitrite/nitrate ratio, with a simultaneous decrease of nitrite reductase (NiR) activity, in both short- and long-term stressed roots, could promote the production of NO by NR in roots under salt stress.
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Affiliation(s)
- Małgorzata Reda
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wrocław, Kanonia 6/8, 50-328 Wrocław, Poland.
| | - Agnieszka Golicka
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wrocław, Kanonia 6/8, 50-328 Wrocław, Poland
| | - Katarzyna Kabała
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wrocław, Kanonia 6/8, 50-328 Wrocław, Poland
| | - Małgorzata Janicka
- Department of Plant Molecular Physiology, Institute of Experimental Biology, University of Wrocław, Kanonia 6/8, 50-328 Wrocław, Poland
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172
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Imran QM, Hussain A, Lee SU, Mun BG, Falak N, Loake GJ, Yun BW. Transcriptome profile of NO-induced Arabidopsis transcription factor genes suggests their putative regulatory role in multiple biological processes. Sci Rep 2018; 8:771. [PMID: 29335449 PMCID: PMC5768701 DOI: 10.1038/s41598-017-18850-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 12/19/2017] [Indexed: 11/08/2022] Open
Abstract
TFs are important proteins regulating plant responses during environmental stresses. These insults typically induce changes in cellular redox tone driven in part by promoting the production of reactive nitrogen species (RNS). The main source of these RNS is nitric oxide (NO), which serves as a signalling molecule, eliciting defence and resistance responses. To understand how these signalling molecules regulate key biological processes, we performed a large scale S-nitrosocysteine (CySNO)-mediated RNA-seq analysis. The DEGs were analysed to identify potential regulatory TFs. We found a total of 673 (up- and down-regulated) TFs representing a broad range of TF families. GO-enrichment and MapMan analysis suggests that more than 98% of TFs were mapped to the Arabidopsis thaliana genome and classified into pathways like hormone signalling, protein degradation, development, biotic and abiotic stress, etc. A functional analysis of three randomly selected TFs, DDF1, RAP2.6, and AtMYB48 identified a regulatory role in plant growth and immunity. Loss-of-function mutations within DDF1 and RAP2.6 showed compromised basal defence and effector triggered immunity, suggesting their positive role in two major plant defence systems. Together, these results imply an important data representing NO-responsive TFs that will help in exploring the core mechanisms involved in biological processes in plants.
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Affiliation(s)
- Qari Muhammad Imran
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Adil Hussain
- Department of Agriculture, Abdul Wali Khan University, Mardan, Pakistan
| | - Sang-Uk Lee
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Bong-Gyu Mun
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Noreen Falak
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea
| | - Gary J Loake
- Institute of Molecular Plant Sciences, University of Edinburgh, King's Buildings, Edinburgh, UK.
| | - Byung-Wook Yun
- Laboratory of Plant Functional Genomics, School of Applied BioSciences, Kyungpook National University, Daegu, Republic of Korea.
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173
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Agurla S, Gayatri G, Raghavendra AS. Polyamines increase nitric oxide and reactive oxygen species in guard cells of Arabidopsis thaliana during stomatal closure. PROTOPLASMA 2018; 255:153-162. [PMID: 28699025 DOI: 10.1007/s00709-017-1139-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 06/26/2017] [Indexed: 05/18/2023]
Abstract
A comprehensive study which was undertaken on the effect of three polyamines (PAs) on stomatal closure was examined in relation to nitric oxide (NO) and reactive oxygen species (ROS) levels in guard cells of Arabidopsis thaliana. Three PAs-putrescine (Put), spermidine (Spd), and spermine (Spm)-induced stomatal closure, while increasing the levels of NO as well as ROS in guard cells. The roles of NO and ROS were confirmed by the reversal of closure by cPTIO (NO scavenger) and catalase (ROS scavenger). The presence of L-NAME (NOS-like enzyme inhibitor) reversed PA-induced stomatal closure, suggesting that NOS-like enzyme played a significant role in NO production during stomatal closure. The reversal of stomatal closure by diphenylene iodonium (DPI, NADPH oxidase inhibitor) or 2-bromoethylamine (BEA, copper amine oxidase inhibitor) or 1,12 diaminododecane (DADD, polyamine oxidase inhibitor) was partial. In contrast, the presence of DPI along with BEA/DADD reversed completely the closure by PAs. We conclude that both NO and ROS are essential signaling components during Put-, Spd-, and Spm-induced stomatal closure. The PA-induced ROS production is mediated by both NADPH oxidase and amine oxidase. The rise in ROS appears to be upstream of NO. Ours is the first detailed study on the role of NO and its dependence on ROS during stomatal closure by three major PAs.
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Affiliation(s)
- Srinivas Agurla
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Gunja Gayatri
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India
| | - Agepati S Raghavendra
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, 500046, India.
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174
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Mittal S, Mallikarjuna MG, Rao AR, Jain PA, Dash PK, Thirunavukkarasu N. Comparative Analysis of CDPK Family in Maize, Arabidopsis, Rice, and Sorghum Revealed Potential Targets for Drought Tolerance Improvement. Front Chem 2017; 5:115. [PMID: 29312925 PMCID: PMC5742180 DOI: 10.3389/fchem.2017.00115] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 11/28/2017] [Indexed: 12/19/2022] Open
Abstract
Calcium dependent protein kinases (CDPKs) play significant role in regulation of plant growth and development in response to various stresses including drought. A set of 32 CDPK genes identified in maize were further used for searching of orthologs in the model plant Arabidopsis (72) and major food crops such as rice (78) and sorghum (91). We comprehensively studied the phylogenetic relationship, annotations, gene duplications, gene structure, divergence time, 3-D protein structures and tissue-specific drought induced expression of CDPK genes in all four species. Variation in intron frequency in the studied species was one of the reasons for the functional diversity of CDPK genes to various stress responses. Protein kinase and protein kinase C phosphorylation site domains were the most conserved motifs identified in all species. Four groups were identified from the sequence-based phylogenetic analysis, in which maize CDPKs were clustered in group III. Expression data showed that the CDPK genes were highly expressed in leaf of maize, rice, and sorghum whereas in Arabidopsis the maximum expression was observed in root. The expression assay showed 5, 6, 11, and 9 were the commonly and differentially expressed drought-related orthologous genes in maize, Arabidopsis, rice, and sorghum, respectively. 3-D protein structure were predicted for the nine genes (Arabidopsis: 2, maize: 2, rice: 3, and sorghum: 2) showing differential expression in at least three species. The predicted 3-D structures were further evaluated and validated by Ramachandran plot, ANOLEA, ProSA, and Verify-3D. The superimposed 3-D structure of drought-related orthologous proteins retained similar folding pattern owing to their conserved nature. Functional annotation revealed the involvement of CDPK genes in various pathways such as osmotic homeostasis, cell protection, and root growth. The interactions of CDPK genes in various pathways play crucial role in imparting drought tolerance through different ABA and MAPK signaling cascades. These selected candidate genes could be targeted in development of drought tolerant genotypes in maize, rice, and sorghum through appropriate breeding approaches. Our comparative experiments of CDPK genes could also be extended in the drought stress breeding programmes of the related species.
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Affiliation(s)
- Shikha Mittal
- Division of Genetics, Indian Agricultural Research Institute (ICAR), New Delhi, India
| | | | - Atmakuri R. Rao
- Centre for Agricultural Bioinformatics, Indian Agricultural Statistics Research Institute (ICAR), New Delhi, India
| | - Prashant A. Jain
- Department of Computational Biology & Bioinformatics, Sam Higginbottom University of Agriculture, Technology, and Sciences, Allahabad, India
| | - Prasanta K. Dash
- ICAR-National Research Centre on Plant Biotechnology, New Delhi, India
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175
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Modulation of Glycine Betaine Accumulation with Oxidative Stress Induced by Aluminium Toxicity in Rice. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/s40011-017-0948-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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176
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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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177
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Balyan S, Kumar M, Mutum RD, Raghuvanshi U, Agarwal P, Mathur S, Raghuvanshi S. Identification of miRNA-mediated drought responsive multi-tiered regulatory network in drought tolerant rice, Nagina 22. Sci Rep 2017; 7:15446. [PMID: 29133823 PMCID: PMC5684420 DOI: 10.1038/s41598-017-15450-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 10/23/2017] [Indexed: 11/21/2022] Open
Abstract
Comparative characterization of microRNA-mediated stress regulatory networks in contrasting rice cultivars is critical to decipher plant stress response. Consequently, a multi-level comparative analysis, using sRNA sequencing, degradome analysis, enzymatic and metabolite assays and metal ion analysis, in drought tolerant and sensitive rice cultivars was conducted. The study identified a group of miRNAs "Cultivar-specific drought responsive" (CSDR)-miRNAs (osa-miR159f, osa-miR1871, osa-miR398b, osa-miR408-3p, osa-miR2878-5p, osa-miR528-5p and osa-miR397a) that were up-regulated in the flag-leaves of tolerant cultivar, Nagina 22 (N22) and Vandana, but down-regulated in the sensitive cultivar, Pusa Basmati 1 (PB1) and IR64, during drought. Interestingly, CSDR-miRNAs target several copper-protein coding transcripts like plantacyanins, laccases and Copper/Zinc superoxide dismutases (Cu/Zn SODs) and are themselves found to be similarly induced under simulated copper-starvation in both N22 and PB1. Transcription factor OsSPL9, implicated in Cu-homeostasis also interacted with osa-miR408-3p and osa-miR528-5p promoters. Further, N22 flag leaves showed lower SOD activity, accumulated ROS and had a higher stomata closure. Interestingly, compared to PB1, internal Cu levels significantly decreased in the N22 flag-leaves, during drought. Thus, the study identifies the unique drought mediated dynamism and interplay of Cu and ROS homeostasis, in the flag leaves of drought tolerant rice, wherein CSDR-miRNAs play a pivotal role.
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Affiliation(s)
- Sonia Balyan
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Mukesh Kumar
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Roseeta Devi Mutum
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Utkarsh Raghuvanshi
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Priyanka Agarwal
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Saloni Mathur
- National Institute of Plant Genome Research, Aruna Asaf Ali Road, New Delhi, 110067, India
| | - Saurabh Raghuvanshi
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
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178
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Lv X, Ge S, Jalal Ahammed G, Xiang X, Guo Z, Yu J, Zhou Y. Crosstalk between Nitric Oxide and MPK1/2 Mediates Cold Acclimation-induced Chilling Tolerance in Tomato. PLANT & CELL PHYSIOLOGY 2017; 58:1963-1975. [PMID: 29036450 DOI: 10.1093/pcp/pcx134] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 08/31/2017] [Indexed: 06/07/2023]
Abstract
The participation of nitric oxide (NO) in the responses of plants towards biotic and abiotic stresses is well established. However, the mechanism involved particularly in cold acclimation-induced chilling tolerance remains elusive. Here we show the cold acclimation induced-chilling tolerance was associated with inductions of nitrate reductase (NR)-dependent NO production, S-nitrosylated glutathione reductase (GSNOR) activity and mitogen-activated protein kinases MPK1/2 activation in tomato plants. Silencing of NR resulted in decreased GSNOR activity and MPK1/2 activation, which subsequently compromised cold acclimation-induced chilling tolerance. By contrast, silencing of GSNOR caused decreased NR activity, increased NO accumulation and MPK1/2 activation, and enhanced cold acclimation-induced chilling tolerance. Furthermore, co-silencing of MPK1 and MPK2 attenuated the NR-dependent NO production and cold acclimation-induced tolerance to chilling. Results from present study suggest the importance of MPK1/2 for the induction of NR-dependent NO generation, while the accumulation of nitrosylated glutathione from NO-derived reactive nitrogen species could potentially S-nitrosylate NR. These findings provide new insight into the crosstalk of NO and MPK1/2 in cold acclimation-induced chilling tolerance in tomato plants.
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Affiliation(s)
- Xiangzhang Lv
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Shibei Ge
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Golam Jalal Ahammed
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Xun Xiang
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Zhixin Guo
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Jingquan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yanhong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, 866 Yuhangtang Road, Hangzhou 310058, China
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179
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Montilla-Bascón G, Rubiales D, Hebelstrup KH, Mandon J, Harren FJM, Cristescu SM, Mur LAJ, Prats E. Reduced nitric oxide levels during drought stress promote drought tolerance in barley and is associated with elevated polyamine biosynthesis. Sci Rep 2017; 7:13311. [PMID: 29042616 PMCID: PMC5645388 DOI: 10.1038/s41598-017-13458-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 09/25/2017] [Indexed: 11/17/2022] Open
Abstract
Nitric oxide (NO) is a key messenger in plant stress responses but its exact role in drought response remains unclear. To investigate the role of NO in drought response we employed transgenic barley plants (UHb) overexpressing the barley non-symbiotic hemoglobin gene HvHb1 that oxidizes NO to NO3-. Reduced NO production under drought conditions in UHb plants was associated with increased drought tolerance. Since NO biosynthesis has been related to polyamine metabolism, we investigated whether the observed drought-related NO changes could involve polyamine pathway. UHb plants showed increases in total polyamines and in particular polyamines such as spermidine. These increases correlated with the accumulation of the amino acid precursors of polyamines and with the expression of specific polyamine biosynthesis genes. This suggests a potential interplay between NO and polyamine biosynthesis during drought response. Since ethylene has been linked to NO signaling and it is also related to polyamine metabolism, we explored this connection. In vivo ethylene measurement showed that UHb plants significantly decrease ethylene production and expression of aminocyclopropane-1-carboxylic acid synthase gene, the first committed step in ethylene biosynthesis compared with wild type. These data suggest a NO-ethylene influenced regulatory node in polyamine biosynthesis linked to drought tolerance/susceptibility in barley.
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Affiliation(s)
| | - Diego Rubiales
- CSIC, Institute for Sustainable Agriculture, Córdoba, Spain
| | - Kim H Hebelstrup
- Section of Crop Genetics and Biotechnology, Department of Molecular Biology and Genetics Aarhus University, Slagelse, Denmark
| | - Julien Mandon
- Radboud University, Department of Molecular and Laser Physics, Nijmegen, The Netherlands
| | - Frans J M Harren
- Radboud University, Department of Molecular and Laser Physics, Nijmegen, The Netherlands
| | - Simona M Cristescu
- Radboud University, Department of Molecular and Laser Physics, Nijmegen, The Netherlands
| | - Luis A J Mur
- Institute of Biological, Environmental and Rural Sciences, University of Aberystwyth, Aberystwyth, UK
| | - Elena Prats
- CSIC, Institute for Sustainable Agriculture, Córdoba, Spain.
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180
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Cao Z, Duan X, Yao P, Cui W, Cheng D, Zhang J, Jin Q, Chen J, Dai T, Shen W. Hydrogen Gas Is Involved in Auxin-Induced Lateral Root Formation by Modulating Nitric Oxide Synthesis. Int J Mol Sci 2017; 18:E2084. [PMID: 28972563 PMCID: PMC5666766 DOI: 10.3390/ijms18102084] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 09/26/2017] [Accepted: 09/29/2017] [Indexed: 11/23/2022] Open
Abstract
Metabolism of molecular hydrogen (H₂) in bacteria and algae has been widely studied, and it has attracted increasing attention in the context of animals and plants. However, the role of endogenous H₂ in lateral root (LR) formation is still unclear. Here, our results showed that H₂-induced lateral root formation is a universal event. Naphthalene-1-acetic acid (NAA; the auxin analog) was able to trigger endogenous H₂ production in tomato seedlings, and a contrasting response was observed in the presence of N-1-naphthyphthalamic acid (NPA), an auxin transport inhibitor. NPA-triggered the inhibition of H₂ production and thereafter lateral root development was rescued by exogenously applied H₂. Detection of endogenous nitric oxide (NO) by the specific probe 4-amino-5-methylamino-2',7'-difluorofluorescein diacetate (DAF-FM DA) and electron paramagnetic resonance (EPR) analyses revealed that the NO level was increased in both NAA- and H₂-treated tomato seedlings. Furthermore, NO production and thereafter LR formation induced by auxin and H₂ were prevented by 2-4-carboxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO; a specific scavenger of NO) and the inhibitor of nitrate reductase (NR; an important NO synthetic enzyme). Molecular evidence confirmed that some representative NO-targeted cell cycle regulatory genes were also induced by H₂, but was impaired by the removal of endogenous NO. Genetic evidence suggested that in the presence of H₂, Arabidopsis mutants nia2 (in particular) and nia1 (two nitrate reductases (NR)-defective mutants) exhibited defects in lateral root length. Together, these results demonstrated that auxin-induced H₂ production was associated with lateral root formation, at least partially via a NR-dependent NO synthesis.
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Affiliation(s)
- Zeyu Cao
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Xingliang Duan
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Ping Yao
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Weiti Cui
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Dan Cheng
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Jing Zhang
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Qijiang Jin
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Jun Chen
- Wuhan Shizhen Water Structure Research Institute Co., Ltd., Wuhan 430200, China.
| | - Tianshan Dai
- Xinjiang Hongsheng Kangtong Biotechnology Co., Ltd., Xinjiang 830022, China.
| | - Wenbiao Shen
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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181
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Luo J, Liu M, Zhang C, Zhang P, Chen J, Guo Z, Lu S. Transgenic Centipedegrass ( Eremochloa ophiuroides [Munro] Hack.) Overexpressing S-Adenosylmethionine Decarboxylase (SAMDC) Gene for Improved Cold Tolerance Through Involvement of H 2O 2 and NO Signaling. FRONTIERS IN PLANT SCIENCE 2017; 8:1655. [PMID: 29018465 PMCID: PMC5614975 DOI: 10.3389/fpls.2017.01655] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 09/08/2017] [Indexed: 05/24/2023]
Abstract
Centipedegrass (Eremochloa ophiuroides [Munro] Hack.) is an important warm-season turfgrass species. Transgenic centipedgrass plants overexpressing S-adenosylmethionine decarboxylase from bermudagrass (CdSAMDC1) that was induced in response to cold were generated in this study. Higher levels of CdSAMDC1 transcript and sperimidine (Spd) and spermin (Spm) concentrations and enhanced freezing and chilling tolerance were observed in transgenic plants as compared with the wild type (WT). Transgenic plants had higher levels of polyamine oxidase (PAO) activity and H2O2 than WT, which were blocked by pretreatment with methylglyoxal bis (guanylhydrazone) or MGBG, inhibitor of SAMDC, indicating that the increased PAO and H2O2 were a result of expression of CdSAMDC1. In addition, transgenic plants had higher levels of nitrate reductase (NR) activity and nitric oxide (NO) concentration. The increased NR activity were blocked by pretreatment with MGBG and ascorbic acid (AsA), scavenger of H2O2, while the increased NO level was blocked by MGBG, AsA, and inhibitors of NR, indicating that the enhanced NR-derived NO was dependent upon H2O2, as a result of expression CdSAMDC1. Elevated superoxide dismutase (SOD) and catalase (CAT) activities were observed in transgenic plants than in WT, which were blocked by pretreatment with MGBG, AsA, inhibitors of NR and scavenger of NO, indicating that the increased activities of SOD and CAT depends on expression of CdSAMDC1, H2O2, and NR-derived NO. Our results suggest that the elevated cold tolerance was associated with PAO catalyzed production of H2O2, which in turn led to NR-derived NO production and induced antioxidant enzyme activities in transgenic plants.
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Affiliation(s)
- Jianhao Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural UniversityGuangzhou, China
| | - Mingxi Liu
- Department of Grassland Science, College of Agronomy, Hunan Agricultural UniversityChangsha, China
| | - Chendong Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural UniversityGuangzhou, China
| | - Peipei Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural UniversityGuangzhou, China
| | - Jingjing Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural UniversityGuangzhou, China
| | - Zhenfei Guo
- College of Grassland Science, Nanjing Agricultural UniversityNanjing, China
| | - Shaoyun Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural UniversityGuangzhou, China
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182
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Sun L, Li Y, Miao W, Piao T, Hao Y, Hao FS. NADK2 positively modulates abscisic acid-induced stomatal closure by affecting accumulation of H 2O 2, Ca 2+ and nitric oxide in Arabidopsis guard cells. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 262:81-90. [PMID: 28716423 DOI: 10.1016/j.plantsci.2017.06.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 05/29/2017] [Accepted: 06/05/2017] [Indexed: 05/04/2023]
Abstract
NAD kinase2 (NADK2) plays key roles in chloroplastic NADP biosynthesis, stress adaptation and modulation of cellular metabolisms in Arabidopsis. However, it is unknown whether and how NADK2 affects abscisic acid (ABA)-mediated stomatal movement. Here, we detected that null mutant nadk2 was more sensitive to drought stress than WT, and NADK2 gene was active in guard cells. Furthermore, NADK2 mutation impaired ABA-induced stomatal closure and ABA inhibition of light-promoted stomatal opening. NADK2 disruption also impaired ABA-stimulated accumulation of H2O2, Ca2+ and nitric oxide (NO) in guard cells, but did not affect the stomatal closure evoked by exogenous H2O2, Ca2+ or NO. Expression analysis revealed that ABA-promoted increases in transcripts of AtrbohD, AtrbohF and NIA1 were markedly arrested in guard cells of nadk2 compared with those of WT. Besides, genetic evidence indicated that NADK2 acted synergistically with OST1 and ABI1 during ABA-induced stomatal closure. Together, these results suggest that NADK2 is an essential positive regulator, and functions upstream of H2O2 in guard cell ABA signaling. It stimulates stomatal closure mainly through increasing the generation of H2O2, Ca2+ and NO in guard cells in Arabidopsis.
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Affiliation(s)
- Lirong Sun
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng 475004, China.
| | - Yaping Li
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng 475004, China.
| | - Wenwen Miao
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng 475004, China.
| | - Tingting Piao
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng 475004, China.
| | - Yang Hao
- Henan University Minsheng College, Kaifeng 475004, China; Shanxi Ding Xin Kang Hua Pharmaceutical Company Limited, Taiyuan 030006, China.
| | - Fu-Shun Hao
- State Key Laboratory of Cotton Biology, Henan Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng 475004, China.
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183
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Zhang TY, Li FC, Fan CM, Li X, Zhang FF, He JM. Role and interrelationship of MEK1-MPK6 cascade, hydrogen peroxide and nitric oxide in darkness-induced stomatal closure. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 262:190-199. [PMID: 28716416 DOI: 10.1016/j.plantsci.2017.06.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/13/2017] [Accepted: 06/23/2017] [Indexed: 05/20/2023]
Abstract
Pharmacological data have suggested the involvement of mitogen-activated protein kinase (MPK) cascades in dark-induced stomatal closure, but which specific MPK cascade participates in the darkness guard cell signaling and its relationship with hydrogen peroxide (H2O2) and nitric oxide (NO) remain unclear. In this paper, we observed that darkness induced activation of MPK6 in leaves of wild-type Arabidopsis (Arabidopsis thaliana) and mutants for nitrate reductase 1 (NIA1), but this effect was inhibited in mutants for MPK Kinase 1 (MEK1) and ATRBOHD/F. Mutants for MEK1, MPK6 and NIA1 showed defect of dark-induced NO production in guard cells and stomatal closure, but were normal in the dark-induced H2O2 generation, while stomata of mutant AtrbohD/F showed defect of dark-induced H2O2 and NO production and subsequent closure. Moreover, exogenous NO rescued the defect of dark-induced stomatal closure in mutants of AtrbohD/F, mek1 and mpk6, while exogenous H2O2 could not rescue the defect of dark-induced stomatal closure in mutants of mek1, mpk6 and nia1. These genetic and biochemical evidences not only show that MEK1-MPK6 cascade, AtRBOHD/F-dependent H2O2 and NIA1-dependent NO are all involved in dark-induced stomatal closure in Arabidopsis, also indicate that MEK1-MPK6 cascade functions via working downstream of H2O2 and upstream of NO.
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Affiliation(s)
- Teng-Yue Zhang
- School of Life Sciences, Shaanxi Normal University, Xi'an 710119, China
| | - Feng-Chen Li
- School of Life Sciences, Shaanxi Normal University, Xi'an 710119, China
| | - Cai-Ming Fan
- School of Life Sciences, Shaanxi Normal University, Xi'an 710119, China
| | - Xuan Li
- School of Life Sciences, Shaanxi Normal University, Xi'an 710119, China
| | - Fang-Fang Zhang
- School of Life Sciences, Shaanxi Normal University, Xi'an 710119, China
| | - Jun-Min He
- School of Life Sciences, Shaanxi Normal University, Xi'an 710119, China.
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184
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Alqurashi M, Thomas L, Gehring C, Marondedze C. A Microsomal Proteomics View of H₂O₂- and ABA-Dependent Responses. Proteomes 2017; 5:proteomes5030022. [PMID: 28820483 PMCID: PMC5620539 DOI: 10.3390/proteomes5030022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/28/2017] [Accepted: 08/16/2017] [Indexed: 01/22/2023] Open
Abstract
The plant hormone abscisic acid (ABA) modulates a number of plant developmental processes and responses to stress. In planta, ABA has been shown to induce reactive oxygen species (ROS) production through the action of plasma membrane-associated nicotinamide adenine dinucleotide phosphate (NADPH)-oxidases. Although quantitative proteomics studies have been performed to identify ABA- or hydrogen peroxide (H2O2)-dependent proteins, little is known about the ABA- and H2O2-dependent microsomal proteome changes. Here, we examined the effect of 50 µM of either H2O2 or ABA on the Arabidopsis microsomal proteome using tandem mass spectrometry and identified 86 specifically H2O2-dependent, and 52 specifically ABA-dependent proteins that are differentially expressed. We observed differential accumulation of proteins involved in the tricarboxylic acid (TCA) cycle notably in response to H2O2. Of these, aconitase 3 responded to both H2O2 and ABA. Additionally, over 30 proteins linked to RNA biology responded significantly to both treatments. Gene ontology categories such as ‘response to stress’ and ‘transport’ were enriched, suggesting that H2O2 or ABA directly and/or indirectly cause complex and partly overlapping cellular responses. Data are available via ProteomeXchange with identifier PXD006513.
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Affiliation(s)
- May Alqurashi
- Cambridge Centre for Proteomics, Cambridge Systems Biology Centre, Department of Biochemistry, University of Cambridge Tennis Court Road, Cambridge CB2 1QR, UK.
- Biological and Environmental Sciences & Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
| | - Ludivine Thomas
- HM. Clause, rue Louis Saillant, Z.I. La Motte, BP83, 26802 Portes-lès-Valence, France.
| | - Chris Gehring
- Biological and Environmental Sciences & Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
- Department of Chemistry, Biology & Biotechnology, University of Perugia, Borgo XX giugno 74, 06121 Perugia, Italy.
| | - Claudius Marondedze
- Cambridge Centre for Proteomics, Cambridge Systems Biology Centre, Department of Biochemistry, University of Cambridge Tennis Court Road, Cambridge CB2 1QR, UK.
- Biological and Environmental Sciences & Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CEA/BIG, 17, avenue des Martyrs, 38054 Grenoble, France.
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185
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Parlati A, Valkov VT, D'Apuzzo E, Alves LM, Petrozza A, Summerer S, Costa A, Cellini F, Vavasseur A, Chiurazzi M. Ectopic Expression of PII Induces Stomatal Closure in Lotus japonicus. FRONTIERS IN PLANT SCIENCE 2017; 8:1299. [PMID: 28791036 PMCID: PMC5524832 DOI: 10.3389/fpls.2017.01299] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 07/10/2017] [Indexed: 05/20/2023]
Abstract
The PII protein in plants has been associated to many different tissue specialized roles concerning the Nitrogen assimilation pathways. We report here the further characterization of L. japonicus transgenic lines overexpressing the PII protein encoded by the LjGLB1 gene that is strongly expressed in the guard cells of Lotus plants. Consistently with a putative role played by PII in that specific cellular context we have observed an alteration of the patterns of stomatal movement in the overexpressing plants. An increased stomatal closure is measured in epidermal peels from detached leaves of normally watered overexpressing plants when compared to wild type plants and this effect was by-passed by Abscisic Acid application. The biochemical characterization of the transgenic lines indicates an increased rate of the Nitric Oxide biosynthetic route, associated to an induced Nitrate Reductase activity. The phenotypic characterization is completed by measures of the photosynthetic potential in plants grown under greenhouse conditions, which reveal a higher stress index of the PII overexpressing plants.
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Affiliation(s)
- Aurora Parlati
- Department of Biology, Agriculture and Food Sciences, Institute of Biosciences and Bioresources, Consiglio Nazionale delle RicercheNapoli, Italy
| | - Vladimir T. Valkov
- Department of Biology, Agriculture and Food Sciences, Institute of Biosciences and Bioresources, Consiglio Nazionale delle RicercheNapoli, Italy
| | - Enrica D'Apuzzo
- Department of Biology, Agriculture and Food Sciences, Institute of Biosciences and Bioresources, Consiglio Nazionale delle RicercheNapoli, Italy
| | - Ludovico M. Alves
- Department of Biology, Agriculture and Food Sciences, Institute of Biosciences and Bioresources, Consiglio Nazionale delle RicercheNapoli, Italy
| | | | | | - Alex Costa
- Department of Bioscience, University of MilanMilan, Italy
- Department of Physics, Institute of Biophysics, Consiglio Nazionale delle RicercheMilan, Italy
| | | | - Alain Vavasseur
- Unitè Mixte de Reserche 6191 Centre National de la Reserche Scientifique, Institute de Biologie Environnementales – Commissariat à l'Energie Atomique-Universitè Aix-Marseille IISt. Paul Lez Durance, France
| | - Maurizio Chiurazzi
- Department of Biology, Agriculture and Food Sciences, Institute of Biosciences and Bioresources, Consiglio Nazionale delle RicercheNapoli, Italy
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186
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Alber NA, Sivanesan H, Vanlerberghe GC. The occurrence and control of nitric oxide generation by the plant mitochondrial electron transport chain. PLANT, CELL & ENVIRONMENT 2017; 40:1074-1085. [PMID: 27987212 DOI: 10.1111/pce.12884] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 12/02/2016] [Accepted: 12/05/2016] [Indexed: 05/03/2023]
Abstract
The plant mitochondrial electron transport chain (ETC) is bifurcated such that electrons from ubiquinol are passed to oxygen via the usual cytochrome path or through alternative oxidase (AOX). We previously showed that knockdown of AOX in transgenic tobacco increased leaf concentrations of nitric oxide (NO), implying that an activity capable of generating NO had been effected. Here, we identify the potential source of this NO. Treatment of leaves with antimycin A (AA, Qi -site inhibitor of Complex III) increased NO amount more than treatment with myxothiazol (Myxo, Qo -site inhibitor) despite both being equally effective at inhibiting respiration. Comparison of nitrate-grown wild-type with AOX knockdown and overexpression plants showed a negative correlation between AOX amount and NO amount following AA. Further, Myxo fully negated the ability of AA to increase NO amount. With ammonium-grown plants, neither AA nor Myxo strongly increased NO amount in any plant line. When these leaves were supplied with nitrite alongside the AA or Myxo, then the inhibitor effects across lines mirrored that of nitrate-grown plants. Hence the ETC, likely the Q-cycle of Complex III generates NO from nitrite, and AOX reduces this activity by acting as a non-energy-conserving electron sink upstream of Complex III.
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Affiliation(s)
- Nicole A Alber
- Department of Biological Sciences and Department of Cell and Systems Biology, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, M1C1A4, Canada
| | - Hampavi Sivanesan
- Department of Biological Sciences and Department of Cell and Systems Biology, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, M1C1A4, Canada
| | - Greg C Vanlerberghe
- Department of Biological Sciences and Department of Cell and Systems Biology, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, M1C1A4, Canada
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187
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Mwaba I, Rey MEC. Nitric oxide associated protein 1 is associated with chloroplast perturbation and disease symptoms in Nicotiana benthamiana infected with South African cassava mosaic virus. Virus Res 2017; 238:75-83. [PMID: 28577889 DOI: 10.1016/j.virusres.2017.05.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 05/22/2017] [Accepted: 05/26/2017] [Indexed: 12/31/2022]
Abstract
Nitric oxide associated 1 (NOA1) in plants is a cyclic GTPase involved in protein translation in the chloroplast and has been indirectly linked to nitric oxide (NO) accumulation and response to biotic stress. The association between NOA1 and NO accumulation in Arabidopsis noa1 mutants has been linked to the inability of noa1 mutants to accumulate carbon reserves such as fumarate, leading to chloroplast dysfunction and a pale green leaf phenotype. To understand the role played by NOA1 in response to South African cassava mosaic virus infection in Nicotiana benthamiana, the expression of NbNOA1 and the accumulation of NO in leaf samples was compared between south african cassava mosaic (SACMV)-infected and mock-infected plants at 14 and 28 dpi. Real-time qPCR was used to measure SACMV viral load which increased significantly by 20% from 14 to 28 dpi as chlorosis and symptom severity progressed. At 14 and 28 dpi, NbNOA1 expression was significantly lower than mock inoculated plants (2-fold lower at 14 dpi, p-value=0.01 and 5-fold lower at 28, p-value=0.00). At 14 dpi, NO accumulation remained unchanged in infected leaf tissue compared to mock inoculated, while at 28 dpi, NO accumulation was 40% lower (p-value=0.01). At 28 dpi, the decrease in NbNOA1 expression and NO accumulation was accompanied by chloroplast dysfunction, evident from the significant reduction in chlorophylls a and b and carotenoids in SACMV-infected leaves. Furthermore, the expression of chloroplast translation factors (chloroplast RNA binding, chloroplast elongation factor G, translation elongation factor Tu, translation initiation factor 3-2, plastid-specific ribosomal protein 6 and plastid ribosome recycling factor) were found to be repressed in infected N. benthamiana. GC-MS analysis showed a decrease in fumarate and an increase in glucose in SACMV-infected N. benthamiana in comparison to mock samples suggesting a decrease in carbon stores. Collectively, these results provide evidence that in response to SACMV infection, a decrease in photopigments and carbon stores, accompanied by an increase in glucose and decrease in fumarate, leads to a decline in NbNOA1expression and NO levels. This is manifested by suppressed translation factors and disruption of chloroplast function, thereby contributing to chlorotic disease symptoms.
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Affiliation(s)
- Imanu Mwaba
- School of Molecular and Cell Biology, University of the Witwatersrand, 1, Jan Smuts Avenue, Braamfontein, Johannesburg 2000, South Africa
| | - Marie Emma Christine Rey
- School of Molecular and Cell Biology, University of the Witwatersrand, 1, Jan Smuts Avenue, Braamfontein, Johannesburg 2000, South Africa.
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188
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Shikha M, Kanika A, Rao AR, Mallikarjuna MG, Gupta HS, Nepolean T. Genomic Selection for Drought Tolerance Using Genome-Wide SNPs in Maize. FRONTIERS IN PLANT SCIENCE 2017; 8:550. [PMID: 28484471 PMCID: PMC5399777 DOI: 10.3389/fpls.2017.00550] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 03/27/2017] [Indexed: 05/05/2023]
Abstract
Traditional breeding strategies for selecting superior genotypes depending on phenotypic traits have proven to be of limited success, as this direct selection is hindered by low heritability, genetic interactions such as epistasis, environmental-genotype interactions, and polygenic effects. With the advent of new genomic tools, breeders have paved a way for selecting superior breeds. Genomic selection (GS) has emerged as one of the most important approaches for predicting genotype performance. Here, we tested the breeding values of 240 maize subtropical lines phenotyped for drought at different environments using 29,619 cured SNPs. Prediction accuracies of seven genomic selection models (ridge regression, LASSO, elastic net, random forest, reproducing kernel Hilbert space, Bayes A and Bayes B) were tested for their agronomic traits. Though prediction accuracies of Bayes B, Bayes A and RKHS were comparable, Bayes B outperformed the other models by predicting highest Pearson correlation coefficient in all three environments. From Bayes B, a set of the top 1053 significant SNPs with higher marker effects was selected across all datasets to validate the genes and QTLs. Out of these 1053 SNPs, 77 SNPs associated with 10 drought-responsive transcription factors. These transcription factors were associated with different physiological and molecular functions (stomatal closure, root development, hormonal signaling and photosynthesis). Of several models, Bayes B has been shown to have the highest level of prediction accuracy for our data sets. Our experiments also highlighted several SNPs based on their performance and relative importance to drought tolerance. The result of our experiments is important for the selection of superior genotypes and candidate genes for breeding drought-tolerant maize hybrids.
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Affiliation(s)
- Mittal Shikha
- Division of Genetics, ICAR-Indian Agricultural Research InstituteNew Delhi, India
| | - Arora Kanika
- Division of Genetics, ICAR-Indian Agricultural Research InstituteNew Delhi, India
| | - Atmakuri Ramakrishna Rao
- Centre for Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research InstituteNew Delhi, India
| | | | - Hari Shanker Gupta
- Division of Genetics, ICAR-Indian Agricultural Research InstituteNew Delhi, India
- Office of Director General, Borlaug Institute for South AsiaNew Delhi, India
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189
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Arbuscular mycorrhizal symbiosis modifies the effects of a nitric oxide donor (sodium nitroprusside;SNP) and a nitric oxide synthesis inhibitor (Nω-nitro-L-arginine methyl ester;L-NAME) on lettuce plants under well watered and drought conditions. Symbiosis 2017. [DOI: 10.1007/s13199-017-0486-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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190
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Ajiboye AA, Dedeke OA, Adeyemo FC. Investigation on antioxidants, free radical scavenger and lipid peroxidation activities of whole grains finger millet (Eleusine coracana L.). INTERNATIONAL JOURNAL OF PLANT BIOLOGY 2017. [DOI: 10.4081/pb.2017.6684] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
This study evaluates the antioxidant potential and free radical scavenging ability of whole grain finger millet. The crude extracts were obtained by cold maceration using 80% ethanol and methanol. Concentrated extracts were subjected to radicals of 2,2’-diphenyl-1-picrylhydrazyl hydrate (DPPH), hydrogen peroxide, nitric oxide (NO) and malondialdehyde, while the antioxidant constituents evaluated includes total phenol and flavonoid. The results revealed that whole grain finger millet contained 14.65±0.41 and 38.19±0.60 mg QUE/g sample of flavoniods, 36.46±1.09 and 67.10±1.17 mg GAE/g sample of total phenolics and 17.61±0.70 and 35.89±1.32 mg AAE/g sample of total antioxidant capacity for methanol and ethanol respectively. Ethanolic extract of whole finger millet scavenged above 50% hyrogen peroxide, NO and DPPH radicals. Hence, it terminated up to 8.97-65.16% lipid peroxidation reaction chain that may result from auto-oxidation, photo-oxidation and any other oxidation stress that may occur in plant and animal tissues. Therefore, pharmocology attention has to be given to finger millet which showed an effective antioxdants and antiradical capacities. Also, cultivation of finger millet should be encouraged by farmers.
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191
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Liu WC, Li YH, Yuan HM, Zhang BL, Zhai S, Lu YT. WD40-REPEAT 5a functions in drought stress tolerance by regulating nitric oxide accumulation in Arabidopsis. PLANT, CELL & ENVIRONMENT 2017; 40:543-552. [PMID: 26825291 DOI: 10.1111/pce.12723] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 01/24/2016] [Accepted: 01/25/2016] [Indexed: 05/04/2023]
Abstract
Nitric oxide (NO) generation by NO synthase (NOS) in guard cells plays a vital role in stomatal closure for adaptive plant response to drought stress. However, the mechanism underlying the regulation of NOS activity in plants is unclear. Here, by screening yeast deletion mutants with decreased NO accumulation and NOS-like activity when subjected to H2 O2 stress, we identified TUP1 as a novel regulator of NOS-like activity in yeast. Arabidopsis WD40-REPEAT 5a (WDR5a), a homolog of yeast TUP1, complemented H2 O2 -induced NO accumulation of a yeast mutant Δtup1, suggesting the conserved role of WDR5a in regulating NO accumulation and NOS-like activity. This note was further confirmed by using an Arabidopsis RNAi line wdr5a-1 and two T-DNA insertion mutants of WDR5a with reduced WDR5a expression, in which both H2 O2 -induced NO accumulation and stomatal closure were repressed. This was because H2 O2 -induced NOS-like activity was inhibited in the mutants compared with that of the wild type. Furthermore, these wdr5a mutants were more sensitive to drought stress as they had reduced stomatal closure and decreased expression of drought-related genes. Together, our results revealed that WDR5a functions as a novel factor to modulate NOS-like activity for changes of NO accumulation and stomatal closure in drought stress tolerance.
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Affiliation(s)
- Wen-Cheng Liu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Yun-Hui Li
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Hong-Mei Yuan
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University, Haikou, 570228, China
| | - Bing-Lei Zhang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Shuang Zhai
- 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
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192
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Corpas FJ, Barroso JB, Palma JM, Rodriguez-Ruiz M. Plant peroxisomes: A nitro-oxidative cocktail. Redox Biol 2017; 11:535-542. [PMID: 28092771 PMCID: PMC5238456 DOI: 10.1016/j.redox.2016.12.033] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 12/28/2016] [Accepted: 12/30/2016] [Indexed: 12/16/2022] Open
Abstract
Although peroxisomes are very simple organelles, research on different species has provided us with an understanding of their importance in terms of cell viability. In addition to the significant role played by plant peroxisomes in the metabolism of reactive oxygen species (ROS), data gathered over the last two decades show that these organelles are an endogenous source of nitric oxide (NO) and related molecules called reactive nitrogen species (RNS). Molecules such as NO and H2O2 act as retrograde signals among the different cellular compartments, thus facilitating integral cellular adaptation to physiological and environmental changes. However, under nitro-oxidative conditions, part of this network can be overloaded, possibly leading to cellular damage and even cell death. This review aims to update our knowledge of the ROS/RNS metabolism, whose important role in plant peroxisomes is still underestimated. However, this pioneering approach, in which key elements such as β-oxidation, superoxide dismutase (SOD) and NO have been mainly described in relation to plant peroxisomes, could also be used to explore peroxisomes from other organisms.
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Affiliation(s)
- Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, C/ Profesor Albareda, 1, 18008 Granada, Spain.
| | - Juan B Barroso
- Biochemistry and Cell Signaling in Nitric Oxide Group, Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, Faculty of Experimental Sciences, Campus Universitario "Las Lagunillas" s/n, University of Jaén, E-23071 Jaén, Spain
| | - José M Palma
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, C/ Profesor Albareda, 1, 18008 Granada, Spain
| | - Marta Rodriguez-Ruiz
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, C/ Profesor Albareda, 1, 18008 Granada, Spain
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193
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Fancy NN, Bahlmann AK, Loake GJ. Nitric oxide function in plant abiotic stress. PLANT, CELL & ENVIRONMENT 2017; 40:462-472. [PMID: 26754426 DOI: 10.1111/pce.12707] [Citation(s) in RCA: 209] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 12/09/2015] [Accepted: 12/26/2015] [Indexed: 05/17/2023]
Abstract
Abiotic stress is one of the main threats affecting crop growth and production. An understanding of the molecular mechanisms that underpin plant responses against environmental insults will be crucial to help guide the rational design of crop plants to counter these challenges. A key feature during abiotic stress is the production of nitric oxide (NO), an important concentration dependent, redox-related signalling molecule. NO can directly or indirectly interact with a wide range of targets leading to the modulation of protein function and the reprogramming of gene expression. The transfer of NO bioactivity can occur through a variety of potential mechanisms but chief among these is S-nitrosylation, a prototypic, redox-based, post-translational modification. However, little is known about this pivotal molecular amendment in the regulation of abiotic stress signalling. Here, we describe the emerging knowledge concerning the function of NO and S-nitrosylation during plant responses to abiotic stress.
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Affiliation(s)
- Nurun Nahar Fancy
- Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, The King's Buildings, Edinburgh, UK, EH9 3BF
| | - Ann-Kathrin Bahlmann
- Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, The King's Buildings, Edinburgh, UK, EH9 3BF
- Technische Universität Braunschweig, Braunschweig, D-38106, Germany
| | - Gary J Loake
- Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, The King's Buildings, Edinburgh, UK, EH9 3BF
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194
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Mukhi N, Kundu S, Kaur J. NO dioxygenase- and peroxidase-like activity of Arabidopsis phytoglobin 3 and its role in Sclerotinia sclerotiorum defense. Nitric Oxide 2017; 68:150-162. [PMID: 28315469 DOI: 10.1016/j.niox.2017.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 02/17/2017] [Accepted: 03/13/2017] [Indexed: 01/05/2023]
Abstract
Phytoglobin 3 appears to be ubiquitous in plants, yet there has been dearth of evidence for their potent physiological functions. Previous crystallographic studies suggest a potential NO dioxygenase like activity of Arabidopsis phytoglobin 3 (AHb3). The present work examined the in vivo function of AHb3 in plant physiology and its role in biotic stress using Arabidopsis- Sclerotinia sclerotorium pathosystem. The gene was found to be ubiquitously expressed in all plant tissues, with moderately increased expression in roots. Its expression was induced upon NO, H2O2 and biotic stress. A C-terminal tagged GFP version of the wild type protein revealed its enhanced accumulation in the guard cells. AHb3-GFP was found to be partitioned majorly into the nucleus while residual amounts were present in the cytoplasm. The loss of function AHb3 mutant exhibited reduced root length and fresh weight. AHb3 knockout lines also displayed enhanced susceptibility towards the S. sclerotiorum. Interestingly, these lines displayed enhanced ROS accumulation upon pathogen challenge as suggested by DAB staining. Furthermore, enhanced/decreased NO accumulation in AHb3 knockout/overexpression lines upon treatment with multiple NO donors suggests a potent NO dioxygenase like activity for the protein. Taken together, our data indicate that AHb3 play a crucial role in regulating root length as well as in mediating defense response against S. sclerotiorum, possibly by modulating NO and ROS levels.
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Affiliation(s)
- Nitika Mukhi
- Department of Genetics, University of Delhi South Campus, New Delhi 110021, India
| | - Suman Kundu
- Department of Biochemistry, University of Delhi South Campus, New Delhi 110021, India
| | - Jagreet Kaur
- Department of Genetics, University of Delhi South Campus, New Delhi 110021, India.
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195
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Qi F, Xiang Z, Kou N, Cui W, Xu D, Wang R, Zhu D, Shen W. Nitric oxide is involved in methane-induced adventitious root formation in cucumber. PHYSIOLOGIA PLANTARUM 2017; 159:366-377. [PMID: 27883217 DOI: 10.1111/ppl.12531] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 10/25/2016] [Accepted: 11/08/2016] [Indexed: 05/08/2023]
Abstract
Our previous studies revealed that methane (CH4 ) induces adventitious rooting in cucumber. However, the corresponding molecular mechanism is still elusive. In this work, we discovered that CH4 triggered the accumulation of nitric oxide (NO) and thereafter cucumber adventitious rooting, mimicking the inducing effects of sodium nitroprusside (SNP) and NONOate (two NO-releasing compounds). Above mentioned responses were sensitive to NO scavenger(s), showing that the accumulation of NO and adventitious root development were respectively impaired. Inhibitor test and biochemical analysis suggested that endogenous NO mainly produced by mammalian NO synthase-like enzyme and diamine oxidases (DAO), might be required for adventitious root formation elicited by CH4 . Molecular evidence confirmed that CH4 -mediated induction of several marker genes responsible for adventitious root development, including CsDNAJ-1, CsCDPK1, CsCDPK5, cell division-related gene CsCDC6, and two auxin signaling genes, CsAux22D-like and CsAux22B-like, was casually dependent on NO signaling. The possible involvement of S-nitrosylation during the mentioned CH4 responses was preliminarily illustrated. Taken together, through pharmacological, anatomical and molecular approaches, it is suggested that NO might be involved in CH4 -induced cucumber adventitious rooting, and CH4 -eliciated NO-targeted proteins might be partially modulated at transcriptional and post-translational levels. Our work may increase the understanding of the mechanisms underlying CH4 -elicited root organogenesis in higher plants.
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Affiliation(s)
- Fang Qi
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhixin Xiang
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ninghai Kou
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Weiti Cui
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Daokun Xu
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ren Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China
| | - Dan Zhu
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wenbiao Shen
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
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196
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Yu QX, Ahammed GJ, Zhou YH, Shi K, Zhou J, Yu Y, Yu JQ, Xia XJ. Nitric oxide is involved in the oxytetracycline-induced suppression of root growth through inhibiting hydrogen peroxide accumulation in the root meristem. Sci Rep 2017; 7:43096. [PMID: 28220869 PMCID: PMC5318916 DOI: 10.1038/srep43096] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 01/18/2017] [Indexed: 02/02/2023] Open
Abstract
Use of antibiotic-contaminated manure in crop production poses a severe threat to soil and plant health. However, few studies have studied the mechanism by which plant development is affected by antibiotics. Here, we used microscopy, flow cytometry, gene expression analysis and fluorescent dyes to study the effects of oxytetracycline (OTC), a widely used antibiotic in agriculture, on root meristem activity and the accumulation of hydrogen peroxide (H2O2) and nitric oxide (NO) in the root tips of tomato seedlings. We found that OTC caused cell cycle arrest, decreased the size of root meristem and inhibited root growth. Interestingly, the inhibition of root growth by OTC was associated with a decline in H2O2 levels but an increase in NO levels in the root tips. Diphenyliodonium (DPI), an inhibitor of H2O2 production, showed similar effects on root growth as those of OTC. However, exogenous H2O2 partially reversed the effects on the cell cycle, meristem size and root growth. Importantly, cPTIO (the NO scavenger) and tungstate (an inhibitor of nitrate reductase) significantly increased H2O2 levels in the root tips and reversed the inhibition of root growth by OTC. Out results suggest that OTC-induced NO production inhibits H2O2 accumulation in the root tips, thus leading to cell cycle arrest and suppression of root growth.
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Affiliation(s)
- Qing-Xiang Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Golam Jalal Ahammed
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Yan-Hong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Kai Shi
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Jie Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Yunlong Yu
- Institute of Pesticide & Environmental Toxicology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Jing-Quan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Hangzhou 310058, China
| | - Xiao-Jian Xia
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
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197
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Vishwakarma K, Upadhyay N, Kumar N, Yadav G, Singh J, Mishra RK, Kumar V, Verma R, Upadhyay RG, Pandey M, Sharma S. Abscisic Acid Signaling and Abiotic Stress Tolerance in Plants: A Review on Current Knowledge and Future Prospects. FRONTIERS IN PLANT SCIENCE 2017; 8:161. [PMID: 28265276 PMCID: PMC5316533 DOI: 10.3389/fpls.2017.00161] [Citation(s) in RCA: 474] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 01/25/2017] [Indexed: 05/18/2023]
Abstract
Abiotic stress is one of the severe stresses of environment that lowers the growth and yield of any crop even on irrigated land throughout the world. A major phytohormone abscisic acid (ABA) plays an essential part in acting toward varied range of stresses like heavy metal stress, drought, thermal or heat stress, high level of salinity, low temperature, and radiation stress. Its role is also elaborated in various developmental processes including seed germination, seed dormancy, and closure of stomata. ABA acts by modifying the expression level of gene and subsequent analysis of cis- and trans-acting regulatory elements of responsive promoters. It also interacts with the signaling molecules of processes involved in stress response and development of seeds. On the whole, the stress to a plant can be susceptible or tolerant by taking into account the coordinated activities of various stress-responsive genes. Numbers of transcription factor are involved in regulating the expression of ABA responsive genes by acting together with their respective cis-acting elements. Hence, for improvement in stress-tolerance capacity of plants, it is necessary to understand the mechanism behind it. On this ground, this article enlightens the importance and role of ABA signaling with regard to various stresses as well as regulation of ABA biosynthetic pathway along with the transcription factors for stress tolerance.
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Affiliation(s)
- Kanchan Vishwakarma
- Department of Biotechnology, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - Neha Upadhyay
- Department of Biotechnology, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - Nitin Kumar
- Department of Biotechnology, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - Gaurav Yadav
- Department of Biotechnology, Motilal Nehru National Institute of TechnologyAllahabad, India
- Centre for Medical Diagnostic and Research, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - Jaspreet Singh
- Department of Biotechnology, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - Rohit K. Mishra
- Centre for Medical Diagnostic and Research, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - Vivek Kumar
- Amity Institute of Microbial Technology, Amity UniversityNoida, India
| | - Rishi Verma
- Department of Biotechnology, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - R. G. Upadhyay
- V.C.S.G Uttarakhand University of Horticulture and ForestryRanichauri, India
| | - Mayank Pandey
- Department of computer Science and Engineering, Motilal Nehru National Institute of TechnologyAllahabad, India
| | - Shivesh Sharma
- Department of Biotechnology, Motilal Nehru National Institute of TechnologyAllahabad, India
- Centre for Medical Diagnostic and Research, Motilal Nehru National Institute of TechnologyAllahabad, India
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198
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Li SW, Leng Y, Shi RF. Transcriptomic profiling provides molecular insights into hydrogen peroxide-induced adventitious rooting in mung bean seedlings. BMC Genomics 2017; 18:188. [PMID: 28212614 PMCID: PMC5316208 DOI: 10.1186/s12864-017-3576-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 02/09/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Hydrogen peroxide (H2O2) has been known to function as a signalling molecule involved in the modulation of various physiological processes in plants. H2O2 has been shown to act as a promoter during adventitious root formation in hypocotyl cuttings. In this study, RNA-Seq was performed to reveal the molecular mechanisms underlying H2O2-induced adventitious rooting. RESULTS RNA-Seq data revealed that H2O2 treatment greatly increased the numbers of clean reads and expressed genes and abundance of gene expression relative to the water treatment. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses indicated that a profound change in gene function occurred in the 6-h H2O2 treatment and that H2O2 mainly enhanced gene expression levels at the 6-h time point but reduced gene expression levels at the 24-h time point compared with the water treatment. In total, 4579 differentially expressed (2-fold change > 2) unigenes (DEGs), of which 78.3% were up-regulated and 21.7% were down-regulated; 3525 DEGs, of which 64.0% were up-regulated and 36.0% were down-regulated; and 7383 DEGs, of which 40.8% were up-regulated and 59.2% were down-regulated were selected in the 6-h, 24-h, and from 6- to 24-h treatments, respectively. The number of DEGs in the 6-h treatment was 29.9% higher than that in the 24-h treatment. The functions of the most highly regulated genes were associated with stress response, cell redox homeostasis and oxidative stress response, cell wall loosening and modification, metabolic processes, and transcription factors (TFs), as well as plant hormone signalling, including auxin, ethylene, cytokinin, gibberellin, and abscisic acid pathways. Notably, a large number of genes encoding for heat shock proteins (HSPs) and heat shock transcription factors (HSFs) were significantly up-regulated during H2O2 treatments. Furthermore, real-time quantitative PCR (qRT-PCR) results showed that, during H2O2 treatments, the expression levels of ARFs, IAAs, AUXs, NACs, RD22, AHKs, MYBs, PIN1, AUX15A, LBD29, LBD41, ADH1b, and QORL were significantly up-regulated at the 6- and/or 24-h time points. In contrast, PER1 and PER2 were significantly down-regulated by H2O2 treatment. These qRT-PCR results strongly correlated with the RNA-Seq data. CONCLUSIONS Using RNA-Seq and qRT-PCR techniques, we analysed the global changes in gene expression and functional profiling during H2O2-induced adventitious rooting in mung bean seedlings. These results strengthen the current understanding of H2O2-induced adventitious rooting and the molecular traits of H2O2 priming in plants.
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Affiliation(s)
- Shi-Weng Li
- School of Environmental and Municipal Engineering, Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Gansu Province, Lanzhou Jiaotong University, 88 West Anning Road, Lanzhou, 730070 People’s Republic of China
| | - Yan Leng
- School of Environmental and Municipal Engineering, Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Gansu Province, Lanzhou Jiaotong University, 88 West Anning Road, Lanzhou, 730070 People’s Republic of China
| | - Rui-Fang Shi
- School of Environmental and Municipal Engineering, Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Gansu Province, Lanzhou Jiaotong University, 88 West Anning Road, Lanzhou, 730070 People’s Republic of China
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199
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Diao Q, Song Y, Shi D, Qi H. Interaction of Polyamines, Abscisic Acid, Nitric Oxide, and Hydrogen Peroxide under Chilling Stress in Tomato ( Lycopersicon esculentum Mill.) Seedlings. FRONTIERS IN PLANT SCIENCE 2017; 8:203. [PMID: 28261254 PMCID: PMC5306283 DOI: 10.3389/fpls.2017.00203] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 02/02/2017] [Indexed: 05/04/2023]
Abstract
Polyamines (PAs) play a vital role in the responses of higher plants to abiotic stresses. However, only a limited number of studies have examined the interplay between PAs and signal molecules. The aim of this study was to elucidate the cross-talk among PAs, abscisic acid (ABA), nitric oxide (NO), and hydrogen peroxide (H2O2) under chilling stress conditions using tomato seedlings [(Lycopersicon esculentum Mill.) cv. Moneymaker]. The study showed that during chilling stress (4°C; 0, 12, and 24 h), the application of spermidine (Spd) and spermine (Spm) elevated NO and H2O2 levels, enhanced nitrite reductase (NR), nitric oxide synthase (NOS)-like, and polyamine oxidase activities, and upregulated LeNR relative expression, but did not influence LeNOS1 expression. In contrast, putrescine (Put) treatment had no obvious impact. During the recovery period (25/15°C, 10 h), the above-mentioned parameters induced by the application of PAs were restored to their control levels. Seedlings pretreated with sodium nitroprusside (SNP, an NO donor) showed elevated Put and Spd levels throughout the treatment period, consistent with increased expression in leaves of genes encoding arginine decarboxylase (LeADC. LeADC1), ornithine decarboxylase (LeODC), and Spd synthase (LeSPDS) expressions in tomato leaves throughout the treatment period. Under chilling stress, the Put content increased first, followed by a rise in the Spd content. Exogenously applied SNP did not increase the expression of genes encoding S-adenosylmethionine decarboxylase (LeSAMDC) and Spm synthase (LeSPMS), consistent with the observation that Spm levels remained constant under chilling stress and during the recovery period. In contrast, exogenous Put significantly increased the ABA content and the 9-cis-epoxycarotenoid dioxygenase (LeNCED1) transcript level. Treatment with ABA could alleviate the electrolyte leakage (EL) induced by D-Arg (an inhibitor of Put). Taken together, it is concluded that, under chilling stress, Spd and Spm enhanced the production of NO in tomato seedlings through an H2O2-dependent mechanism, via the NR and NOS-like pathways. ABA is involved in Put-induced tolerance to chilling stress, and NO could increase the content of Put and Spd under chilling stress.
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Affiliation(s)
- Qiannan Diao
- College of Horticulture, Shenyang Agricultural UniversityShenyang, China
- Key Laboratory of Protected Horticulture of Ministry of Education and Liaoning Province, Collaborative Innovation Center of Protected Vegetable Surround Bohai Gulf RegionShenyang, China
| | - Yongjun Song
- College of Horticulture, Shenyang Agricultural UniversityShenyang, China
- Key Laboratory of Protected Horticulture of Ministry of Education and Liaoning Province, Collaborative Innovation Center of Protected Vegetable Surround Bohai Gulf RegionShenyang, China
| | - Dongmei Shi
- College of Horticulture, Shenyang Agricultural UniversityShenyang, China
- Key Laboratory of Protected Horticulture of Ministry of Education and Liaoning Province, Collaborative Innovation Center of Protected Vegetable Surround Bohai Gulf RegionShenyang, China
| | - Hongyan Qi
- College of Horticulture, Shenyang Agricultural UniversityShenyang, China
- Key Laboratory of Protected Horticulture of Ministry of Education and Liaoning Province, Collaborative Innovation Center of Protected Vegetable Surround Bohai Gulf RegionShenyang, China
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200
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A mathematical model of the interaction of abscisic acid, ethylene and methyl jasmonate on stomatal closure in plants. PLoS One 2017; 12:e0171065. [PMID: 28182683 PMCID: PMC5300265 DOI: 10.1371/journal.pone.0171065] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 01/16/2017] [Indexed: 02/05/2023] Open
Abstract
Stomatal closure is affected by various stimuli such as light, atmospheric carbon dioxide concentration, humidity and phytohormones. Our research focuses on phytohormones, specifically: abscisic acid (ABA), ethylene (ET) and methyl jasmonate (MeJA) that are responsible for the regulation of several plant processes, especially in guard cell signalling. While several studies show that these three phytohormones cause stomatal closure in plants, only two studies are notable for establishing a mathematical model of guard cell signalling involving phytohormones. Those two studies employed Boolean modelling and mechanistic ordinary differential equations modelling. In this study, we propose a new mathematical model of guard cell transduction network for stomatal closure using continuous logical modelling framework. Results showed how the different components of the network function. Furthermore, the model verified the role of antioxidants in the closure mechanism, and the diminished closure level of stomata with combined ABA-ET stimulus. The analysis was extended to ABA-ET-MeJA crosstalk.
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