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Singh A, Rajput VD, Lalotra S, Agrawal S, Ghazaryan K, Singh J, Minkina T, Rajput P, Mandzhieva S, Alexiou A. Zinc oxide nanoparticles influence on plant tolerance to salinity stress: insights into physiological, biochemical, and molecular responses. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:148. [PMID: 38578547 DOI: 10.1007/s10653-024-01921-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 02/18/2024] [Indexed: 04/06/2024]
Abstract
A slight variation in ecological milieu of plants, like drought, heavy metal toxicity, abrupt changes in temperature, flood, and salt stress disturbs the usual homeostasis or metabolism in plants. Among these stresses, salinity stress is particularly detrimental to the plants, leading to toxic effects and reduce crop productivity. In a saline environment, the accumulation of sodium and chloride ions up to toxic levels significantly correlates with intracellular osmotic pressure, and can result in morphological, physiological, and molecular alterations in plants. Increased soil salinity triggers salt stress signals that activate various cellular-subcellular mechanisms in plants to enable their survival in saline conditions. Plants can adapt saline conditions by maintaining ion homeostasis, activating osmotic stress pathways, modulating phytohormone signaling, regulating cytoskeleton dynamics, and maintaining cell wall integrity. To address ionic toxicity, researchers from diverse disciplines have explored novel approaches to support plant growth and enhance their resilience. One such approach is the application of nanoparticles as a foliar spray or seed priming agents positively improve the crop quality and yield by activating germination enzymes, maintaining reactive oxygen species homeostasis, promoting synthesis of compatible solutes, stimulating antioxidant defense mechanisms, and facilitating the formation of aquaporins in seeds and root cells for efficient water absorption under various abiotic stresses. Thus, the assessment mainly targets to provide an outline of the impact of salinity stress on plant metabolism and the resistance strategies employed by plants. Additionally, the review also summarized recent research efforts exploring the innovative applications of zinc oxide nanoparticles for reducing salt stress at biochemical, physiological, and molecular levels.
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Affiliation(s)
- Abhishek Singh
- Faculty of Biology, Yerevan State University, 0025, Yerevan, Armenia
| | - Vishnu D Rajput
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia.
| | - Shivani Lalotra
- School of Agriculture, Lovely Professional University, Jalandhar, India
| | - Shreni Agrawal
- Department of Biotechnology, Parul Institute of Applied Science, Parul University, Vadodara, 391760, Gujarat, India
| | - Karen Ghazaryan
- Faculty of Biology, Yerevan State University, 0025, Yerevan, Armenia
| | - Jagpreet Singh
- University Centre for Research and Development, Chandigarh University, Mohali, India
| | - Tatiana Minkina
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Priyadarshani Rajput
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Saglara Mandzhieva
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Athanasios Alexiou
- Department of Science and Engineering, Novel Global Community Educational Foundation, Hebersham, NSW, 2770, Australia
- AFNP Med, 1030, Vienna, Austria
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Ge M, Tang Y, Guan Y, Lv M, Zhou C, Ma H, Lv J. TaWRKY31, a novel WRKY transcription factor in wheat, participates in regulation of plant drought stress tolerance. BMC PLANT BIOLOGY 2024; 24:27. [PMID: 38172667 PMCID: PMC10763432 DOI: 10.1186/s12870-023-04709-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 12/26/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND Wheat, a crucial food crop in China, is highly vulnerable to drought stress throughout its growth and development. WRKY transcription factors (TFs), being one of the largest families of TFs, play a vital role in responding to various abiotic stresses in plants. RESULTS Here, we cloned and characterized the TF TaWRKY31 isolated from wheat. This TF, belonging to the WRKY II family, contains a WRKYGQK amino acid sequence and a C2H2-type zinc finger structure. TaWRKY31 exhibits tissue-specific expression and demonstrates responsiveness to abiotic stresses in wheat. TaWRKY31 protein is localized in the nucleus and can function as a TF with transcription activating activity at the N-terminus. Results showed that the wheat plants with silenced strains (BSMV:TaWRKY31-1as and BSMV:TaWRKY31-2as) exhibited poor growth status and low relative water content when subjected to drought treatment. Moreover, the levels of O2·-, H2O2, and malondialdehyde (MDA) in the BSMV:TaWRKY31-induced wheat plants increased, while the activities of antioxidant enzymes (superoxide dismutase, peroxidase, and catalase) decreased. Compared to control plants, BSMV:TaWRKY31-induced wheat plants exhibited lower expression levels of TaSOD (Fe), TaPOD, TaCAT, TaDREB1, TaP5CS, TaNCED1, TaSnRK2, TaPP2C, and TaPYL5.Under stress or drought treatment conditions, the overexpression of TaWRKY31 in Arabidopsis resulted in decreased levels of H2O2 and MDA, as well as reduced stomatal opening and water loss. Furthermore, an increase in resistance oxidase activity, germination rate, and root length in the TaWRKY31 transgenic Arabidopsis was observed. Lastly, overexpression of TaWRKY31 in Arabidopsis resulted in higher the expression levels of AtNCED3, AtABA2, AtSnRK2.2, AtABI1, AtABF3, AtP5CS1, AtSOD (Cu/Zn), AtPOD, AtCAT, AtRD29A, AtRD29B, and AtDREB2A than in control plants. CONCLUSIONS Our findings indicate that TaWRKY31 enhances drought resistance in plants by promoting the scavenging of reactive oxygen species, reducing stomatal opening, and increasing the expression levels of stress-related genes.
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Affiliation(s)
- Miaomiao Ge
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Yan Tang
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Yijun Guan
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Meicheng Lv
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Chunjv Zhou
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Huiling Ma
- College of Life Sciences, Northwest A&F University, Yangling, China.
| | - Jinyin Lv
- College of Life Sciences, Northwest A&F University, Yangling, China.
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Wang N, Lin Y, Qi F, Xiaoyang C, Peng Z, Yu Y, Liu Y, Zhang J, Qi X, Deyholos M, Zhang J. Comprehensive Analysis of Differentially Expressed Genes and Epigenetic Modification-Related Expression Variation Induced by Saline Stress at Seedling Stage in Fiber and Oil Flax, Linum usitatissimum L. PLANTS (BASEL, SWITZERLAND) 2022; 11:2053. [PMID: 35956530 PMCID: PMC9370232 DOI: 10.3390/plants11152053] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/23/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
The ability of different germplasm to adapt to a saline-alkali environment is critical to learning about the tolerance mechanism of saline-alkali stress in plants. Flax is an important oil and fiber crop in many countries. However, its molecular tolerance mechanism under saline stress is still not clear. In this study, we studied morphological, physiological characteristics, and gene expression variation in the root and leaf in oil and fiber flax types under saline stress, respectively. Abundant differentially expressed genes (DEGs) induced by saline stress, tissue/organ specificity, and different genotypes involved in plant hormones synthesis and metabolism and transcription factors and epigenetic modifications were detected. The present report provides useful information about the mechanism of flax response to saline stress and could lead to the future elucidation of the specific functions of these genes and help to breed suitable flax varieties for saline/alkaline soil conditions.
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Affiliation(s)
- Ningning Wang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Yujie Lin
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Fan Qi
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Chunxiao Xiaoyang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Zhanwu Peng
- Information Center, Jilin Agricultural University, Changchun 130000, China
| | - Ying Yu
- School of Basic Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Yingnan Liu
- Institute of Natural Resource and Ecology, Heilongjiang Academy of Science, Harbin 150040, China
| | - Jun Zhang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Xin Qi
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
| | - Michael Deyholos
- Department of Biology, University of British Columbia Okanagan, Kelowna, BC V1V 1V7, Canada
| | - Jian Zhang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 131018, China
- Department of Biology, University of British Columbia Okanagan, Kelowna, BC V1V 1V7, Canada
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Wang M, Ren LT, Wei XY, Ling YM, Gu HT, Wang SS, Ma XF, Kong GC. NAC Transcription Factor TwNAC01 Positively Regulates Drought Stress Responses in Arabidopsis and Triticale. FRONTIERS IN PLANT SCIENCE 2022; 13:877016. [PMID: 35812952 PMCID: PMC9257188 DOI: 10.3389/fpls.2022.877016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
The NAC transcription factors play important roles in regulating plant growth, development, and senescence, and responding to biotic and abiotic stressors in plants. A novel coding sequence (1,059 bp) was cloned from hexaploid triticale in this study. The putative protein (352 amino acids) encoded by this sequence was over 95% similar to the amino acid sequence of a NAC protein from Aegilops tauschii (XP020161331), and it formed a clade with Ae. tauschii, durum wheat, and barley. The putative protein contained a conserved nature actomyosin (NAM) domain (129 consecutive amino acids) between the 20th and 148th amino acids at the N-terminus and three transcription activation regions at the C-terminus. The novel gene was identified as a triticale NAC gene localized in the nucleus and designated as TwNAC01 (GenBank accession MG736919). The expression levels of TwNAC01 were the highest in roots, followed by leaves and stems when triticale lines were exposed to drought, polyethylene glycol 6,000 (PEG6000), NaCl, cold, methyl jasmonate (MeJA), and abscisic acid (ABA). Transgenic Arabidopsis thaliana overexpressing TwNAC01 had significantly lower leaf water loss rates and longer roots than wild-type (WT) A. thaliana. Virus-induced silencing of the TwNAC01 gene in triticale delayed root development and decreased length of primary root. Under drought stress, leaves of TwNAC01-silenced triticale had higher levels of malondialdehyde (MDA) and hydrogen peroxide (H2O2), but lower relative water content (RWC), net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, and transpiration rate than the leaves of the WT. Gene overexpression and silencing experiments suggested that TwNAC01 improves plant stress tolerance by increasing root length, regulating the water content of plant leaves by reducing MDA and H2O2 content, and adjusting respiration rate. The results suggest that TwNAC01 is a novel NAC transcription factor gene that can be exploited for triticale and cereal improvement.
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Affiliation(s)
- Meng Wang
- Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Agriculture College of Shihezi University, Shihezi, China
- Institute of Economic Crops, Xinjiang Academy of Agricultural Sciences, Urumqi, China
| | - Li-Tong Ren
- School of Chemistry and Chemical Engineering of Shihezi University, Shihezi, China
| | - Xiao-Yong Wei
- Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Agriculture College of Shihezi University, Shihezi, China
| | - Yue-Ming Ling
- Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Agriculture College of Shihezi University, Shihezi, China
| | - Hai-Tao Gu
- Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Agriculture College of Shihezi University, Shihezi, China
| | - Shan-Shan Wang
- Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Agriculture College of Shihezi University, Shihezi, China
| | - Xue-Feng Ma
- Forage Genetics International, West Salem, WI, United States
| | - Guang-Chao Kong
- Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Agriculture College of Shihezi University, Shihezi, China
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Ren C, Kuang Y, Lin Y, Guo Y, Li H, Fan P, Li S, Liang Z. Overexpression of grape ABA receptor gene VaPYL4 enhances tolerance to multiple abiotic stresses in Arabidopsis. BMC PLANT BIOLOGY 2022; 22:271. [PMID: 35655129 PMCID: PMC9161562 DOI: 10.1186/s12870-022-03663-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 05/27/2022] [Indexed: 05/30/2023]
Abstract
BACKGROUND Abscisic acid (ABA) plays a crucial role in abiotic stress responses. The pyrabactin resistance (PYR)/PYR-like (PYL)/regulatory component of ABA receptor (RCAR) proteins that have been characterized as ABA receptors function as the core components in ABA signaling pathway. However, the functions of grape PYL genes in response to different abiotic stresses, particularly cold stress, remain less studied. RESULTS In this study, we investigated the expression profiles of grape PYL genes upon cold treatment and isolated the VaPYL4 gene from Vitis amurensis, a cold-hardy grape species. Overexpression of VaPYL4 gene in grape calli and Arabidopsis resulted in enhanced cold tolerance. Moreover, plant resistance to drought and salt stress was also improved by overexpressing VaPYL4 in Arabidopsis. More importantly, we evaluated the contribution of VaPYL4 to plant growth and development after the treatment with cold, salt and drought stress simultaneously. The transgenic plants showed higher survival rates, earlier flowering phenotype, and heavier fresh weight of seedlings and siliques when compared with wild-type plants. Physiological analyses showed that transgenic plants had much lower content of malondialdehyde (MDA) and higher peroxidase (POD) activity. Stress-responsive genes such as RD29A (Responsive to desiccation 29A), COR15A (Cold responsive 15A) and KIN2 (Kinase 2) were also significantly up-regulated in VaPYL4-overexpressing Arabidopsis plants. CONCLUSIONS Our results show that overexpression of VaPYL4 could improve plant performance upon different abiotic stresses, which therefore provides a useful strategy for engineering future crops to deal with adverse environments.
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Affiliation(s)
- Chong Ren
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
| | - Yangfu Kuang
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Yanping Lin
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Yuchen Guo
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Huayang Li
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Peige Fan
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
| | - Shaohua Li
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
| | - Zhenchang Liang
- Beijing Key Laboratory of Grape Sciences and Enology, Key Laboratory of Plant Resource, Institute of Botany, Chinese Academy of Sciences, Nanxin Village 20, Xiangshan, Haidian District, Beijing, 100093 People’s Republic of China
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Banerjee A, Roychoudhury A. Dissecting the phytohormonal, genomic and proteomic regulation of micronutrient deficiency during abiotic stresses in plants. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01099-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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7
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Li Z, Zhu L, Zhao F, Li J, Zhang X, Kong X, Wu H, Zhang Z. Plant Salinity Stress Response and Nano-Enabled Plant Salt Tolerance. FRONTIERS IN PLANT SCIENCE 2022; 13:843994. [PMID: 35392516 PMCID: PMC8981240 DOI: 10.3389/fpls.2022.843994] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 02/25/2022] [Indexed: 05/27/2023]
Abstract
The area of salinized land is gradually expanding cross the globe. Salt stress seriously reduces the yield and quality of crops and endangers food supply to meet the demand of the increased population. The mechanisms underlying nano-enabled plant tolerance were discussed, including (1) maintaining ROS homeostasis, (2) improving plant's ability to exclude Na+ and to retain K+, (3) improving the production of nitric oxide, (4) increasing α-amylase activities to increase soluble sugar content, and (5) decreasing lipoxygenase activities to reduce membrane oxidative damage. The possible commonly employed mechanisms such as alleviating oxidative stress damage and maintaining ion homeostasis were highlighted. Further, the possible role of phytohormones and the molecular mechanisms in nano-enabled plant salt tolerance were discussed. Overall, this review paper aims to help the researchers from different field such as plant science and nanoscience to better understand possible new approaches to address salinity issues in agriculture.
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Affiliation(s)
- Zengqiang Li
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, China
| | - Lan Zhu
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Fameng Zhao
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jiaqi Li
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xin Zhang
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, China
| | - Xiangjun Kong
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, China
| | - Honghong Wu
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
- Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Shenzhen, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Zhiyong Zhang
- Henan Collaborative Innovation Centre of Modern Biological Breeding, Henan Institute of Science and Technology, Xinxiang, China
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Liu B, Zhao FM, Cao Y, Wang XY, Li Z, Shentu Y, Zhou H, Xia YP. Photoprotection contributes to freezing tolerance as revealed by RNA-seq profiling of rhododendron leaves during cold acclimation and deacclimation over time. HORTICULTURE RESEARCH 2022; 9:uhab025. [PMID: 35039836 PMCID: PMC8801717 DOI: 10.1093/hr/uhab025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 01/18/2022] [Accepted: 10/14/2021] [Indexed: 06/14/2023]
Abstract
Cold acclimation (CA) and deacclimation (DA), which are often accompanied by changes in freezing tolerance (FT), carbohydrates and hormones, are crucial for winter survival, especially under global warming. Plants with weak CA and premature DA caused by warm winters and/or unseasonal warm spells can be easily injured by adverse reactions to cold. Thus, understanding the molecular mechanisms of FT is imperative. In this study, we used high-throughput RNA-seq to profile the CA and DA of leaves of overwintering Rhododendron "Miyo-no-Sakae" over time; these leaves do not undergo dormancy but do undergo photoprotection during CA, and they do not grow during DA. Using Mfuzz and weighted gene coexpression network analysis, we identified specific transcriptional characteristics in each phase of CA and DA and proposed networks involving coexpressed genes and physiological traits. In particular, we discovered that the circadian rhythm is critical for obtaining the strongest FT, and high expression of circadian rhythm-related genes might be linked to sugar accumulation during winter. Furthermore, evergreen leaves exhibited robust photoprotection during winter, as revealed by high values of nonphotochemical quenching, high expression of transcripts annotated as "early light-induced proteins", loss of granum stacks and destacking of thylakoids, all of which were alleviated during DA. The strong requirement of photoprotection could be the reason for decreased abscisic acid (ABA) and jasmonic acid (JA) contents during CA, and decreases in ABA and JA contents may contribute to decreases in lignin content. Our data suggest that the molecular mechanisms of FT in overwintering leaves are unique, which may be due to the high requirements for photoprotection during winter.
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Affiliation(s)
- Bing Liu
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Fang-Meng Zhao
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Yan Cao
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Xiu-Yun Wang
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Zheng Li
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Yuanyue Shentu
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Hong Zhou
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
| | - Yi-Ping Xia
- Genomics and Genetic Engineering Laboratory of Ornamental Plants, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Zhejiang 310058, China
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Ren Z, Wang RY, Huang XY, Wang Y. Sulfur Compounds in Regulation of Stomatal Movement. FRONTIERS IN PLANT SCIENCE 2022; 13:846518. [PMID: 35360293 PMCID: PMC8963490 DOI: 10.3389/fpls.2022.846518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/09/2022] [Indexed: 05/06/2023]
Abstract
Sulfur, widely present in the soil and atmosphere, is one of the essential elements for plants. Sulfate is a dominant form of sulfur in soils taken up by plant roots. In addition to the assimilation into sulfur compounds essential for plant growth and development, it has been reported recently that sulfate as well as other sulfur containing compounds can also induce stomatal movement. Here, we first summarized the uptake and transport of sulfate and atmospheric sulfur, including H2O and SO2, and then, focused on the effects of inorganic and organic sulfur on stomatal movement. We concluded all the transporters for different sulfur compounds, and compared the expression level of those transporters in guard cells and mesophyll cells. The relationship between abscisic acid and sulfur compounds in regulation of stomatal movement were also discussed.
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Affiliation(s)
- Zirong Ren
- Institute of Ecology, College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of Ministry of Education, Peking University, Beijing, China
| | - Ru-Yuan Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Xin-Yuan Huang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
- *Correspondence: Xin-Yuan Huang,
| | - Yin Wang
- Institute of Ecology, College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of Ministry of Education, Peking University, Beijing, China
- Yin Wang,
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Caselles V, Casadesús A, Munné-Bosch S. A Dual Role for Abscisic Acid Integrating the Cold Stress Response at the Whole-Plant Level in Iris pseudacorus L. Growing in a Natural Wetland. FRONTIERS IN PLANT SCIENCE 2021; 12:722525. [PMID: 34950157 PMCID: PMC8688363 DOI: 10.3389/fpls.2021.722525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 11/03/2021] [Indexed: 06/14/2023]
Abstract
Leaf senescence, the last stage of the developmental program of leaves, can be induced by both internal and external signals. Cold stress-induced leaf senescence is an efficient strategy to overcome winter temperatures. In this work, we studied leaf senescence in yellow flag (Iris pseudacorus L.) individuals growing in a natural wetland, not only considering its relationship with external and internal cues, but also the plant developmental program, and the biological significance of rhizomes, storage organs that remain viable through winter. Total chlorophyll contents and the maximum efficiency of PSII (Fv /Fm ratio) decreased in senescing leaves, which was associated with a sharp increase in abscisic acid (ABA) contents. Furthermore, total cytokinin and 2-isopentenyladenine contents decreased in December compared to November, as plants became more stressed due to a decline in air temperatures. ABA increases in senescing leaves increased in parallel to reductions in violaxanthin. Rhizomes also accumulated large amounts of ABA during winter, while roots did not, and neither roots nor rhizomes accumulated 9-cis-epoxycarotenoids, thus suggesting ABA, which might play a role in conferring cold tolerance to this subterranean organ, may result from phloem transport from senescing leaves. It is concluded that (i) leaf senescence is a highly regulated physiological process in yellow flag playing a key role in the modulation of the entire plant developmental program, and (ii) ABA plays a major role not only in the regulation of leaf senescence but also in the establishment of cold tolerance in rhizomes, two processes that appear to be intimately interconnected.
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Affiliation(s)
- Vicent Caselles
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Andrea Casadesús
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Sergi Munné-Bosch
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain
- Research Biodiversity Institute, Faculty of Biology, University of Barcelona, Barcelona, Spain
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Tong S, Chen N, Wang D, Ai F, Liu B, Ren L, Chen Y, Zhang J, Lou S, Liu H, Liu J, Ma T, Jiang Y. The U-box E3 ubiquitin ligase PalPUB79 positively regulates ABA-dependent drought tolerance via ubiquitination of PalWRKY77 in Populus. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:2561-2575. [PMID: 34382303 PMCID: PMC8633511 DOI: 10.1111/pbi.13681] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 08/09/2021] [Indexed: 05/22/2023]
Abstract
The abscisic acid (ABA) signalling pathway is involved in the plant response to osmotic stress caused by drought and/or salinity. Although the ABA signalling pathway has been elucidated in Arabidopsis, it remains elusive in woody poplars. In this study, genome-wide analyses of U-box genes in poplars revealed that a U-box E3 ubiquitin ligase gene, PalPUB79, is significantly induced following drought, salinity and ABA signalling. PalPUB79 overexpression enhanced drought tolerance in transgenic poplars, while PalPUB79 RNAi lines were more sensitive to drought. PalPUB79 positively regulated ABA signalling pathway. Furthermore, PalPUB79 interacted with PalWRKY77, a negative transcriptional regulator of ABA signalling, and mediated its ubiquitination for degradation, therefore counteracting its inhibitory effect on PalRD26 transcription. However, the finding that PalWRKY77 negatively regulates PalPUB79 expression was indicative of a negative feedback loop between PalWRKY77 and PalPUB79 during ABA signalling in poplar. These findings provide novel insight into the mechanism through which PalPUB79 enhances the ABA-mediated stress response in woody poplars.
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Affiliation(s)
- Shaofei Tong
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Ningning Chen
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Deyan Wang
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Fandi Ai
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Bao Liu
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Liwen Ren
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Yang Chen
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Junlin Zhang
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Shangling Lou
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Huanhuan Liu
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Jianquan Liu
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
- State Key Laboratory of Grassland Agro‐EcosystemInstitute of Innovation Ecology & College of Life ScienceLanzhou UniversityLanzhouChina
| | - Tao Ma
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
| | - Yuanzhong Jiang
- Key Laboratory for Bio‐resources and Eco‐environment of Ministry of EducationCollege of Life ScienceSichuan UniversityChengduChina
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12
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Brookbank BP, Patel J, Gazzarrini S, Nambara E. Role of Basal ABA in Plant Growth and Development. Genes (Basel) 2021; 12:genes12121936. [PMID: 34946886 PMCID: PMC8700873 DOI: 10.3390/genes12121936] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/27/2021] [Accepted: 11/28/2021] [Indexed: 01/01/2023] Open
Abstract
Abscisic acid (ABA) regulates various aspects of plant physiology, including promoting seed dormancy and adaptive responses to abiotic and biotic stresses. In addition, ABA plays an im-portant role in growth and development under non-stressed conditions. This review summarizes phenotypes of ABA biosynthesis and signaling mutants to clarify the roles of basal ABA in growth and development. The promotive and inhibitive actions of ABA in growth are characterized by stunted and enhanced growth of ABA-deficient and insensitive mutants, respectively. Growth regulation by ABA is both promotive and inhibitive, depending on the context, such as concentrations, tissues, and environmental conditions. Basal ABA regulates local growth including hyponastic growth, skotomorphogenesis and lateral root growth. At the cellular level, basal ABA is essential for proper chloroplast biogenesis, central metabolism, and expression of cell-cycle genes. Basal ABA also regulates epidermis development in the shoot, by inhibiting stomatal development, and deposition of hydrophobic polymers like a cuticular wax layer covering the leaf surface. In the root, basal ABA is involved in xylem differentiation and suberization of the endodermis. Hormone crosstalk plays key roles in growth and developmental processes regulated by ABA. Phenotypes of ABA-deficient and insensitive mutants indicate prominent functions of basal ABA in plant growth and development.
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Affiliation(s)
- Benjamin P. Brookbank
- Department of Cells and Systems Biology, University of Toronto, Toronto, ON M3S 3G5, Canada; (B.P.B.); (J.P.)
| | - Jasmin Patel
- Department of Cells and Systems Biology, University of Toronto, Toronto, ON M3S 3G5, Canada; (B.P.B.); (J.P.)
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
| | - Sonia Gazzarrini
- Department of Cells and Systems Biology, University of Toronto, Toronto, ON M3S 3G5, Canada; (B.P.B.); (J.P.)
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
- Correspondence: (S.G.); (E.N.)
| | - Eiji Nambara
- Department of Cells and Systems Biology, University of Toronto, Toronto, ON M3S 3G5, Canada; (B.P.B.); (J.P.)
- Correspondence: (S.G.); (E.N.)
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Condition-Specific Molecular Network Analysis Revealed That Flagellar Proteins Are Involved in Electron Transfer Processes of Shewanella piezotolerans WP3. Genet Res (Camb) 2021; 2021:9953783. [PMID: 34456634 PMCID: PMC8371737 DOI: 10.1155/2021/9953783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 05/28/2021] [Accepted: 07/20/2021] [Indexed: 12/01/2022] Open
Abstract
Because of the ability to metabolize a large number of electron acceptors such as nitrate, nitrite, fumarate, and metal oxides, Shewanella species have attracted much attention in recent years. Generally, the use of these electron acceptors is mainly achieved through electron transfer proteins and their interactions which will dynamically change across different environmental conditions in cells. Therefore, functional analysis of condition-specific molecular networks can reveal biological information on electron transfer processes. By integrating expression data and molecular networks, we constructed condition-specific molecular networks for Shewanella piezotolerans WP3. We then identified condition-specific key genes and studied their potential functions with an emphasis on their roles in electron transfer processes. Functional module analysis showed that different flagellar assembly modules appeared under these conditions and suggested that flagellar proteins are important for these conditions. We also identified the electron transfer modules underlying these various environmental conditions. The present results could help with screening electron transfer genes and understanding electron transfer processes under various environmental conditions for the Shewanella species.
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14
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Iqbal N, Umar S, Khan NA, Corpas FJ. Crosstalk between abscisic acid and nitric oxide under heat stress: exploring new vantage points. PLANT CELL REPORTS 2021; 40:1429-1450. [PMID: 33909122 DOI: 10.1007/s00299-021-02695-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/05/2021] [Indexed: 05/22/2023]
Abstract
Heat stress adversely affects plants growth potential. Global warming is reported to increase in the intensity, frequency, and duration of heatwaves, eventually affecting ecology, agriculture and economy. With an expected increase in average temperature by 2-3 °C over the next 30-50 years, crop production is facing a severe threat to sub-optimum growth conditions. Abscisic acid (ABA) and nitric oxide (NO) are growth regulators that are involved in the adaptation to heat stress by affecting each other and changing the adaptation process. The interaction between these molecules has been discussed in various studies in general or under stress conditions; however, regarding high temperature, their interaction has little been worked out. In the present review, the focus is shifted on the role of these molecules under heat stress emphasizing the different possible interactions between ABA and NO as both regulate stomatal closure and other molecules including hydrogen peroxide (H2O2), hydrogen sulfide (H2S), antioxidants, proline, glycine betaine, calcium (Ca2+) and heat shock protein (HSP). Exploring the crosstalk between ABA and NO with other molecules under heat stress will provide us with a comprehensive knowledge of plants mechanism of heat tolerance which could be useful to develop heat stress-resistant varieties.
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Affiliation(s)
- Noushina Iqbal
- Department of Botany, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India.
| | - Shahid Umar
- Department of Botany, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, 110062, India
| | - Nafees A Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - 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, Apartado 419, 18080, Granada, Spain.
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15
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Zeng Y, Verstraeten I, Trinh HK, Heugebaert T, Stevens CV, Garcia-Maquilon I, Rodriguez PL, Vanneste S, Geelen D. Arabidopsis Hypocotyl Adventitious Root Formation Is Suppressed by ABA Signaling. Genes (Basel) 2021; 12:genes12081141. [PMID: 34440314 PMCID: PMC8392626 DOI: 10.3390/genes12081141] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/14/2021] [Accepted: 07/20/2021] [Indexed: 12/03/2022] Open
Abstract
Roots are composed of different root types and, in the dicotyledonous Arabidopsis, typically consist of a primary root that branches into lateral roots. Adventitious roots emerge from non-root tissue and are formed upon wounding or other types of abiotic stress. Here, we investigated adventitious root (AR) formation in Arabidopsis hypocotyls under conditions of altered abscisic acid (ABA) signaling. Exogenously applied ABA suppressed AR formation at 0.25 µM or higher doses. AR formation was less sensitive to the synthetic ABA analog pyrabactin (PB). However, PB was a more potent inhibitor at concentrations above 1 µM, suggesting that it was more selective in triggering a root inhibition response. Analysis of a series of phosphonamide and phosphonate pyrabactin analogs suggested that adventitious root formation and lateral root branching are differentially regulated by ABA signaling. ABA biosynthesis and signaling mutants affirmed a general inhibitory role of ABA and point to PYL1 and PYL2 as candidate ABA receptors that regulate AR inhibition.
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Affiliation(s)
- Yinwei Zeng
- Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (Y.Z.); (I.V.); (H.K.T.); (S.V.)
| | - Inge Verstraeten
- Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (Y.Z.); (I.V.); (H.K.T.); (S.V.)
- Institute of Science and Technology (IST) Austria, Am Campus 1, 3400 Klosterneuburg, Austria
| | - Hoang Khai Trinh
- Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (Y.Z.); (I.V.); (H.K.T.); (S.V.)
| | - Thomas Heugebaert
- Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (T.H.); (C.V.S.)
| | - Christian V. Stevens
- Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (T.H.); (C.V.S.)
| | - Irene Garcia-Maquilon
- Instituto de Biologia Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas, Universidad Politecnica de Valencia, Avd de los Naranjos, 46022 Valencia, Spain; (I.G.-M.); (P.L.R.)
| | - Pedro L. Rodriguez
- Instituto de Biologia Molecular y Celular de Plantas, Consejo Superior de Investigaciones Cientificas, Universidad Politecnica de Valencia, Avd de los Naranjos, 46022 Valencia, Spain; (I.G.-M.); (P.L.R.)
| | - Steffen Vanneste
- Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (Y.Z.); (I.V.); (H.K.T.); (S.V.)
- Department of Plant Biotechnology and bioinformatics, Faculty of Sciences, Ghent University, Technologiepark 71, 9052 Ghent, Belgium
- Lab of Plant Growth Analysis, Ghent University Global Campus, Incheon 21985, Korea
| | - Danny Geelen
- Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (Y.Z.); (I.V.); (H.K.T.); (S.V.)
- Correspondence: ; Tel.: +32-9-264-6070
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16
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Sano N, Marion-Poll A. ABA Metabolism and Homeostasis in Seed Dormancy and Germination. Int J Mol Sci 2021; 22:5069. [PMID: 34064729 PMCID: PMC8151144 DOI: 10.3390/ijms22105069] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/29/2021] [Accepted: 05/01/2021] [Indexed: 02/07/2023] Open
Abstract
Abscisic acid (ABA) is a key hormone that promotes dormancy during seed development on the mother plant and after seed dispersal participates in the control of dormancy release and germination in response to environmental signals. The modulation of ABA endogenous levels is largely achieved by fine-tuning, in the different seed tissues, hormone synthesis by cleavage of carotenoid precursors and inactivation by 8'-hydroxylation. In this review, we provide an overview of the current knowledge on ABA metabolism in developing and germinating seeds; notably, how environmental signals such as light, temperature and nitrate control seed dormancy through the adjustment of hormone levels. A number of regulatory factors have been recently identified which functional relationships with major transcription factors, such as ABA INSENSITIVE3 (ABI3), ABI4 and ABI5, have an essential role in the control of seed ABA levels. The increasing importance of epigenetic mechanisms in the regulation of ABA metabolism gene expression is also described. In the last section, we give an overview of natural variations of ABA metabolism genes and their effects on seed germination, which could be useful both in future studies to better understand the regulation of ABA metabolism and to identify candidates as breeding materials for improving germination properties.
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Affiliation(s)
| | - Annie Marion-Poll
- IJPB Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France;
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17
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Raina M, Kumar A, Yadav N, Kumari S, Yusuf MA, Mustafiz A, Kumar D. StCaM2, a calcium binding protein, alleviates negative effects of salinity and drought stress in tobacco. PLANT MOLECULAR BIOLOGY 2021; 106:85-108. [PMID: 33629224 DOI: 10.1007/s11103-021-01131-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 02/09/2021] [Indexed: 05/20/2023]
Abstract
KEY MESSAGE Overexpression of StCaM2 in tobacco promotes plant growth and confers increased salinity and drought tolerance by enhancing the photosynthetic efficiency, ROS scavenging, and recovery from membrane injury. Calmodulins (CaMs) are important Ca2+ sensors that interact with effector proteins and drive a network of signal transduction pathways involved in regulating the growth and developmental pattern of plants under stress. Herein, using in silico analysis, we identified 17 CaM isoforms (StCaM) in potato. Expression profiling revealed different temporal and spatial expression patterns of these genes, which were modulated under abiotic stress. Among the identified StCaM genes, StCaM2 was found to have the largest number of abiotic stress responsive promoter elements. In addition, StCaM2 was upregulated in response to some of the selected abiotic stress in potato tissues. Overexpression of StCaM2 in transgenic tobacco plants enhanced their tolerance to salinity and drought stress. Accumulation of reactive oxygen species was remarkably decreased in transgenic lines compared to that in wild type plants. Chlorophyll a fluorescence analysis suggested better performance of photosystem II in transgenic plants under stress compared to that in wild type plants. The increase in salinity stress tolerance in StCaM2-overexpressing plants was also associated with a favorable K+/Na+ ratio. The enhanced tolerance to abiotic stresses correlated with the increase in the activities of anti-oxidative enzymes in transgenic tobacco plants. Overall, our results suggest that StCaM2 can be a novel candidate for conferring salt and drought tolerance in plants.
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Affiliation(s)
- Meenakshi Raina
- Department of Botany, Central University of Jammu, Rahya-Suchani (Bagla), Dist- Samba, Jammu and Kashmir, 181143, India
| | - Ashish Kumar
- Plant Molecular Biology Laboratory, Faculty of Life Sciences and Biotechnology, South Asian University, Akbar Bhawan, Chanakyapuri, New Delhi, 110021, India
| | - Nikita Yadav
- Plant Molecular Biology Laboratory, Faculty of Life Sciences and Biotechnology, South Asian University, Akbar Bhawan, Chanakyapuri, New Delhi, 110021, India
| | - Sumita Kumari
- Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu and Kashmir, India
| | - Mohd Aslam Yusuf
- Department of Bioengineering, Integral University, Dasauli, Kursi Road, Lucknow, 226026, India
| | - Ananda Mustafiz
- Plant Molecular Biology Laboratory, Faculty of Life Sciences and Biotechnology, South Asian University, Akbar Bhawan, Chanakyapuri, New Delhi, 110021, India.
| | - Deepak Kumar
- Department of Botany, Central University of Jammu, Rahya-Suchani (Bagla), Dist- Samba, Jammu and Kashmir, 181143, India.
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India.
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18
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Li Y, Si YT, He YX, Li JX. Comparative analysis of drought-responsive and -adaptive genes in Chinese wingnut (Pterocarya stenoptera C. DC). BMC Genomics 2021; 22:155. [PMID: 33663380 PMCID: PMC7934232 DOI: 10.1186/s12864-021-07470-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 02/23/2021] [Indexed: 12/02/2022] Open
Abstract
Background Drought is the main stress factor for the cultivation of Pterocarya stenoptera in urban areas, and this factor will cause its dehydration and affect its growth. Identifying drought-related genes will be useful for understanding the drought adaptation mechanism of P. stenoptera. Results We used physiological indicator detection, comparative transcriptome sequencing, and reanalysis on the results of previous landscape genomics studies to investigate the drought adaptation mechanism in P. stenoptera. The changes in malondialdehyde content showed that P. stenoptera was remarkably affected by drought stress, and the increase in soluble sugar content suggested its important role in response to drought stress. Results of comparative transcriptome sequencing showed that P. stenoptera initiated a series of programs, such as increasing the gene expression of unsaturated fatty acids, tyrosine, and plant pathogen resistance, to deal with the transient drought stress. According to the annotated results in a previous study, P. stenoptera adapts to the long-term differential drought stress by regulating the thickness of cell walls and expressing upper or lower limits of the downstream genes in the hormone signaling pathway. Through the comparative analysis of drought-responsive and -adaptive genes in P. stenoptera, this study supports the hypothesis that the environment-responsive genes (ERGs) introduced by the transient environmental stresses will be substantially more than the environment-adaptive genes (EAGs) in response to long-term differential environmental stresses, and the EAGs are not necessarily ERGs. Conclusions Our study identified drought-responsive and -adaptive genes in P. stenoptera and revealed that P. stenoptera increased the gene expression of unsaturated fatty acids, tyrosine, and plant pathogen resistance in response to transient drought stress. This study reveals the different adaptation mechanism of P. stenoptera under the transient and long-term differential drought stresses. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07470-z.
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Affiliation(s)
- Yong Li
- Innovation Platform of Molecular Biology, College of Landcape and Art, Henan Agricultural University, Zhengzhou, China.
| | - Yu-Tao Si
- Innovation Platform of Molecular Biology, College of Landcape and Art, Henan Agricultural University, Zhengzhou, China
| | - Yan-Xia He
- School of Life Sciences, Henan University, Kaifeng, China
| | - Jia-Xin Li
- Innovation Platform of Molecular Biology, College of Landcape and Art, Henan Agricultural University, Zhengzhou, China
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Kim S, Park SI, Kwon H, Cho MH, Kim BG, Chung JH, Nam MH, Song JS, Kim KH, Yoon IS. The Rice Abscisic Acid-Responsive RING Finger E3 Ligase OsRF1 Targets OsPP2C09 for Degradation and Confers Drought and Salinity Tolerance in Rice. FRONTIERS IN PLANT SCIENCE 2021; 12:797940. [PMID: 35095969 PMCID: PMC8792764 DOI: 10.3389/fpls.2021.797940] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 11/25/2021] [Indexed: 05/18/2023]
Abstract
Drought and salinity are major important factors that restrain growth and productivity of rice. In plants, many really interesting new gene (RING) finger proteins have been reported to enhance drought and salt tolerance. However, their mode of action and interacting substrates are largely unknown. Here, we identified a new small RING-H2 type E3 ligase OsRF1, which is involved in the ABA and stress responses of rice. OsRF1 transcripts were highly induced by ABA, salt, or drought treatment. Upregulation of OsRF1 in transgenic rice conferred drought and salt tolerance and increased endogenous ABA levels. Consistent with this, faster transcriptional activation of key ABA biosynthetic genes, ZEP, NCED3, and ABA4, was observed in OsRF1-OE plants compared with wild type in response to drought stress. Yeast two-hybrid assay, BiFC, and co-immunoprecipitation analysis identified clade A PP2C proteins as direct interacting partners with OsRF1. In vitro ubiquitination assay indicated that OsRF1 exhibited E3 ligase activity, and that it targeted OsPP2C09 protein for ubiquitination and degradation. Cell-free degradation assay further showed that the OsPP2C09 protein is more rapidly degraded by ABA in the OsRF1-OE rice than in the wild type. The combined results suggested that OsRF1 is a positive player of stress responses by modulating protein stability of clade A PP2C proteins, negative regulators of ABA signaling.
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Affiliation(s)
- Suyeon Kim
- Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju, South Korea
| | - Seong-Im Park
- Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju, South Korea
| | - Hyeokjin Kwon
- Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju, South Korea
| | - Mi Hyeon Cho
- Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju, South Korea
| | - Beom-Gi Kim
- Metabolic Engineering Division, National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA), Jeonju, South Korea
| | - Joo Hee Chung
- Seoul Center, Korea Basic Science (KBSI), Seoul, South Korea
| | - Myung Hee Nam
- Seoul Center, Korea Basic Science (KBSI), Seoul, South Korea
| | - Ji Sun Song
- Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju, South Korea
| | - Kyung-Hwan Kim
- Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju, South Korea
| | - In Sun Yoon
- Gene Engineering Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju, South Korea
- *Correspondence: In Sun Yoon,
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20
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Markulin L, Škiljaica A, Tokić M, Jagić M, Vuk T, Bauer N, Leljak Levanić D. Taking the Wheel - de novo DNA Methylation as a Driving Force of Plant Embryonic Development. FRONTIERS IN PLANT SCIENCE 2021; 12:764999. [PMID: 34777448 PMCID: PMC8585777 DOI: 10.3389/fpls.2021.764999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/13/2021] [Indexed: 05/16/2023]
Abstract
During plant embryogenesis, regardless of whether it begins with a fertilized egg cell (zygotic embryogenesis) or an induced somatic cell (somatic embryogenesis), significant epigenetic reprogramming occurs with the purpose of parental or vegetative transcript silencing and establishment of a next-generation epigenetic patterning. To ensure genome stability of a developing embryo, large-scale transposon silencing occurs by an RNA-directed DNA methylation (RdDM) pathway, which introduces methylation patterns de novo and as such potentially serves as a global mechanism of transcription control during developmental transitions. RdDM is controlled by a two-armed mechanism based around the activity of two RNA polymerases. While PolIV produces siRNAs accompanied by protein complexes comprising the methylation machinery, PolV produces lncRNA which guides the methylation machinery toward specific genomic locations. Recently, RdDM has been proposed as a dominant methylation mechanism during gamete formation and early embryo development in Arabidopsis thaliana, overshadowing all other methylation mechanisms. Here, we bring an overview of current knowledge about different roles of DNA methylation with emphasis on RdDM during plant zygotic and somatic embryogenesis. Based on published chromatin immunoprecipitation data on PolV binding sites within the A. thaliana genome, we uncover groups of auxin metabolism, reproductive development and embryogenesis-related genes, and discuss possible roles of RdDM at the onset of early embryonic development via targeted methylation at sites involved in different embryogenesis-related developmental mechanisms.
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21
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Martignago D, Siemiatkowska B, Lombardi A, Conti L. Abscisic Acid and Flowering Regulation: Many Targets, Different Places. Int J Mol Sci 2020; 21:ijms21249700. [PMID: 33353251 PMCID: PMC7767233 DOI: 10.3390/ijms21249700] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 12/13/2022] Open
Abstract
Plants can react to drought stress by anticipating flowering, an adaptive strategy for plant survival in dry climates known as drought escape (DE). In Arabidopsis, the study of DE brought to surface the involvement of abscisic acid (ABA) in controlling the floral transition. A central question concerns how and in what spatial context can ABA signals affect the floral network. In the leaf, ABA signaling affects flowering genes responsible for the production of the main florigen FLOWERING LOCUS T (FT). At the shoot apex, FD and FD-like transcription factors interact with FT and FT-like proteins to regulate ABA responses. This knowledge will help separate general and specific roles of ABA signaling with potential benefits to both biology and agriculture.
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Hewage KAH, Yang J, Wang D, Hao G, Yang G, Zhu J. Chemical Manipulation of Abscisic Acid Signaling: A New Approach to Abiotic and Biotic Stress Management in Agriculture. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001265. [PMID: 32999840 PMCID: PMC7509701 DOI: 10.1002/advs.202001265] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/11/2020] [Indexed: 05/02/2023]
Abstract
The phytohormone abscisic acid (ABA) is the best-known stress signaling molecule in plants. ABA protects sessile land plants from biotic and abiotic stresses. The conserved pyrabactin resistance/pyrabactin resistance-like/regulatory component of ABA receptors (PYR/PYL/RCAR) perceives ABA and triggers a cascade of signaling events. A thorough knowledge of the sequential steps of ABA signaling will be necessary for the development of chemicals that control plant stress responses. The core components of the ABA signaling pathway have been identified with adequate characterization. The information available concerning ABA biosynthesis, transport, perception, and metabolism has enabled detailed functional studies on how the protective ability of ABA in plants might be modified to increase plant resistance to stress. Some of the significant contributions to chemical manipulation include ABA biosynthesis inhibitors, and ABA receptor agonists and antagonists. Chemical manipulation of key control points in ABA signaling is important for abiotic and biotic stress management in agriculture. However, a comprehensive review of the current knowledge of chemical manipulation of ABA signaling is lacking. Here, a thorough analysis of recent reports on small-molecule modulation of ABA signaling is provided. The challenges and prospects in the chemical manipulation of ABA signaling for the development of ABA-based agrochemicals are also discussed.
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Affiliation(s)
- Kamalani Achala H. Hewage
- Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationCollege of ChemistryCentral China Normal UniversityWuhan430079P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and HealthCentral China Normal UniversityWuhan430079P. R. China
| | - Jing‐Fang Yang
- Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationCollege of ChemistryCentral China Normal UniversityWuhan430079P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and HealthCentral China Normal UniversityWuhan430079P. R. China
| | - Di Wang
- Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationCollege of ChemistryCentral China Normal UniversityWuhan430079P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and HealthCentral China Normal UniversityWuhan430079P. R. China
| | - Ge‐Fei Hao
- Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationCollege of ChemistryCentral China Normal UniversityWuhan430079P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and HealthCentral China Normal UniversityWuhan430079P. R. China
| | - Guang‐Fu Yang
- Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationCollege of ChemistryCentral China Normal UniversityWuhan430079P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and HealthCentral China Normal UniversityWuhan430079P. R. China
- Collaborative Innovation Center of Chemical Science and EngineeringTianjin300072P. R. China
| | - Jian‐Kang Zhu
- Shanghai Center for Plant Stress Biologyand CAS Center of Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai20032P. R. China
- Department of Horticulture and Landscape ArchitecturePurdue UniversityWest LafayetteIN47907USA
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AcoMYB4, an Ananas comosus L. MYB Transcription Factor, Functions in Osmotic Stress through Negative Regulation of ABA Signaling. Int J Mol Sci 2020; 21:ijms21165727. [PMID: 32785037 PMCID: PMC7460842 DOI: 10.3390/ijms21165727] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/03/2020] [Accepted: 08/07/2020] [Indexed: 11/17/2022] Open
Abstract
Drought and salt stress are the main environmental cues affecting the survival, development, distribution, and yield of crops worldwide. MYB transcription factors play a crucial role in plants’ biological processes, but the function of pineapple MYB genes is still obscure. In this study, one of the pineapple MYB transcription factors, AcoMYB4, was isolated and characterized. The results showed that AcoMYB4 is localized in the cell nucleus, and its expression is induced by low temperature, drought, salt stress, and hormonal stimulation, especially by abscisic acid (ABA). Overexpression of AcoMYB4 in rice and Arabidopsis enhanced plant sensitivity to osmotic stress; it led to an increase in the number stomata on leaf surfaces and lower germination rate under salt and drought stress. Furthermore, in AcoMYB4 OE lines, the membrane oxidation index, free proline, and soluble sugar contents were decreased. In contrast, electrolyte leakage and malondialdehyde (MDA) content increased significantly due to membrane injury, indicating higher sensitivity to drought and salinity stresses. Besides the above, both the expression level and activities of several antioxidant enzymes were decreased, indicating lower antioxidant activity in AcoMYB4 transgenic plants. Moreover, under osmotic stress, overexpression of AcoMYB4 inhibited ABA biosynthesis through a decrease in the transcription of genes responsible for ABA synthesis (ABA1 and ABA2) and ABA signal transduction factor ABI5. These results suggest that AcoMYB4 negatively regulates osmotic stress by attenuating cellular ABA biosynthesis and signal transduction pathways.
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Zhang J, Zhou H, Zhou M, Ge Z, Zhang F, Foyer CH, Yuan X, Xie Y. The coordination of guard-cell autonomous ABA synthesis and DES1 function in situ regulates plant water deficit responses. J Adv Res 2020; 27:191-197. [PMID: 33318877 PMCID: PMC7728585 DOI: 10.1016/j.jare.2020.07.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/21/2020] [Accepted: 07/21/2020] [Indexed: 12/25/2022] Open
Abstract
Introduction Drought stress triggers the synthesis and accumulation of the phytohormone abscisic acid (ABA), which regulates stomatal aperture and hence reducing plant water loss. Hydrogen sulfide (H2S), which is produced by the enzyme L-cysteine desulfhydrase 1 (DES1) that catalyzes the desulfuration of L-cysteine in Arabidopsis, also plays a critical role in the regulation of drought-induced stomatal closure. However, little is known about the regulation of DES1 or the crosstalk between H2S and ABA signaling in response to dehydration. Objectives To demonstrate the potential crosstalk between DES1-dependent H2S and ABA signaling in response to dehydration and its regulation mechanism. Methods Firstly, by introducing guard cell-specific MYB60 promoter, to produce complementary lines of DES1 or ABA3 into guard cell of des1 or aba3 mutant. And the related genes expression and water loss under ABA, NaHS, or dehydration treatment in these mutant or transgenics lines were determinate. Results We found that dehydration-induced expression of DES1 is abolished in the abscisic acid deficient 3 (aba3) mutants that are deficient in ABA synthesis. Both the complementation of ABA3 expression in guard cells of the aba3 mutants and ABA treatment rescue the dehydration-induced expression of DES1, as well as the wilting phenotype observed in these mutants. Moreover, the drought-induced expression of ABA synthesis genes was suppressed in des1 mutants. While the addition of ABA or the expression of either ABA3 or DES1 in the guard cells of the aba3/des1 double mutant did not alter the wilting phenotype of these mutants, the wild type phenotype was fully restored by the expression of both ABA3 and DES1, or by the application of NaHS. Conclusion These results demonstrate that the coordinated synthesis of ABA and DES1 expression is required for drought-induced stomatal closure in Arabidopsis.
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Affiliation(s)
- Jing Zhang
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Heng Zhou
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Mingjian Zhou
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Zhenglin Ge
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Feng Zhang
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Christine H Foyer
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston B15 2TT, UK
| | - Xingxing Yuan
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yanjie Xie
- Laboratory Center of Life Sciences, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
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Hong Y, Wang Z, Shi H, Yao J, Liu X, Wang F, Zeng L, Xie Z, Zhu JK. Reciprocal regulation between nicotinamide adenine dinucleotide metabolism and abscisic acid and stress response pathways in Arabidopsis. PLoS Genet 2020; 16:e1008892. [PMID: 32569316 PMCID: PMC7332101 DOI: 10.1371/journal.pgen.1008892] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/02/2020] [Accepted: 05/27/2020] [Indexed: 12/28/2022] Open
Abstract
Nicotinamide adenine dinucleotide (NAD) is an essential coenzyme that has emerged as a central hub linking redox equilibrium and signal transduction in living organisms. The homeostasis of NAD is required for plant growth, development, and adaption to environmental cues. In this study, we isolated a chilling hypersensitive Arabidopsis thaliana mutant named qs-2 and identified the causal mutation in the gene encoding quinolinate synthase (QS) critical for NAD biosynthesis. The qs-2 mutant is also hypersensitive to salt stress and abscisic acid (ABA) but resistant to drought stress. The qs-2 mutant accumulates a reduced level of NAD and over-accumulates reactive oxygen species (ROS). The ABA-hypersensitivity of qs-2 can be rescued by supplementation of NAD precursors and by mutations in the ABA signaling components SnRK2s or RBOHF. Furthermore, ABA-induced over-accumulation of ROS in the qs-2 mutant is dependent on the SnRK2s and RBOHF. The expression of QS gene is repressed directly by ABI4, a transcription factor in the ABA response pathway. Together, our findings reveal an unexpected interplay between NAD biosynthesis and ABA and stress signaling, which is critical for our understanding of the regulation of plant growth and stress responses.
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Affiliation(s)
- Yechun Hong
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Shanghai, P.R. China
| | - Zhen Wang
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- * E-mail: (ZW); (JKZ)
| | - Huazhong Shi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, United States of America
| | - Juanjuan Yao
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Shanghai, P.R. China
| | - Xue Liu
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Fuxing Wang
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Shanghai, P.R. China
| | - Liang Zeng
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Zhi Xie
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Shanghai, P.R. China
| | - Jian-Kang Zhu
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
- * E-mail: (ZW); (JKZ)
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Liu H, Xue X, Yu Y, Xu M, Lu C, Meng X, Zhang B, Ding X, Chu Z. Copper ions suppress abscisic acid biosynthesis to enhance defence against Phytophthora infestans in potato. MOLECULAR PLANT PATHOLOGY 2020; 21:636-651. [PMID: 32077242 PMCID: PMC7170774 DOI: 10.1111/mpp.12919] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 01/22/2020] [Accepted: 01/22/2020] [Indexed: 05/07/2023]
Abstract
Copper-based antimicrobial compounds are widely and historically used to control plant diseases, such as late blight caused by Phytophthora infestans, which seriously affects the yield and quality of potato. We previously identified that copper ion (Cu2+ ) acts as an extremely sensitive elicitor to induce ethylene (ET)-dependent immunity in Arabidopsis. Here, we found that Cu2+ induces the defence response to P. infestans in potato. Cu2+ suppresses the transcription of the abscisic acid (ABA) biosynthetic genes StABA1 and StNCED1, resulting in decreased ABA content. Treatment with ABA or inhibitor fluridone made potato more susceptible or resistance to late blight, respectively. In addition, potato with knockdown of StABA1 or StNCED1 showed greater resistance to late blight, suggesting that ABA negatively regulates potato resistance to P. infestans. Cu2+ also promotes the rapid biosynthesis of ET. Potato plants treated with 1-aminocyclopropane-1-carboxylate showed enhanced resistance to late blight. Repressed expression of StEIN2 or StEIN3 resulted in enhanced transcription of StABA1 and StNCED1, accumulation of ABA and susceptibility to P. infestans. Consistently, StEIN3 directly binds to the promoter regions of StABA1 and StNCED1. Overall, we concluded that Cu2+ triggers the defence response to potato late blight by activating ET biosynthesis to inhibit the biosynthesis of ABA.
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Affiliation(s)
- Hai‐Feng Liu
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTai anShandongPR China
| | - Xiao‐Jing Xue
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTai anShandongPR China
| | - Yue Yu
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTai anShandongPR China
| | - Ming‐Ming Xu
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTai anShandongPR China
| | - Chong‐Chong Lu
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTai anShandongPR China
| | - Xuan‐Lin Meng
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTai anShandongPR China
| | - Bao‐Gang Zhang
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTai anShandongPR China
- Vector‐borne Virus Research CenterState Key Laboratory of Ecological Pest Control for Fujian and Taiwan CropsFujian Agriculture and Forestry UniversityFuzhouFujianPR China
| | - Xin‐Hua Ding
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTai anShandongPR China
| | - Zhao‐Hui Chu
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTai anShandongPR China
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Zhao Q, Yang XY, Li Y, Liu F, Cao XY, Jia ZH, Song SS. N-3-oxo-hexanoyl-homoserine lactone, a bacterial quorum sensing signal, enhances salt tolerance in Arabidopsis and wheat. BOTANICAL STUDIES 2020; 61:8. [PMID: 32157475 PMCID: PMC7064656 DOI: 10.1186/s40529-020-00283-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 02/19/2020] [Indexed: 05/26/2023]
Abstract
BACKGROUND N-acyl-homoserine lactones (AHLs) are the quorum sensing (QS) signal molecules to coordinate the collective behavior in a population in Gram-negative bacteria. Recent evidences demonstrate their roles in plant growth and defense responses. RESULTS In present study, we show that the treatment of plant roots with N-3-oxo-hexanoyl-homoserine lactone (3OC6-HSL), one molecule of AHLs family, resulted in enhanced salt tolerance in Arabidopsis and wheat. We found that the growth inhibition phenotype including root length, shoot length and fresh weight were significantly improved by 3OC6-HSL under salt stress condition. The physiological and biochemical analysis revealed that the contents of chlorophyll and proline were increased and the contents of MDA and Na+ and Na+/K+ ratios were decreased after 3OC6-HSL treatment in Arabidopsis and wheat under salt stress condition. Molecular analysis showed that 3OC6-HSL significantly upregulated the expression of salt-responsive genes including ABA-dependent osmotic stress responsive genes COR15a, RD22, ADH and P5CS1, ABA-independent gene ERD1, and ion-homeostasis regulation genes SOS1, SOS2 and SOS3 in Arabidopsis under salt stress condition. CONCLUSIONS These results indicated that 3OC6-HSL enhanced plant salt tolerance and ABA-dependent and ABA-independent signal pathways and SOS signaling might be involved in the induction of salt resistance by 3OC6-HSL in plants. Our data provide a new insight into the plant-microbe inter-communication.
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Affiliation(s)
- Qian Zhao
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051 Hebei China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, China
| | - Xiang-Yun Yang
- College of Life Science, Hebei University, 180th East Road of Wusi, Baoding, China
| | - Yao Li
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051 Hebei China
| | - Fang Liu
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051 Hebei China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, China
| | - Xiang-Yu Cao
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051 Hebei China
| | - Zhen-Hua Jia
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051 Hebei China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, China
| | - Shui-Shan Song
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051 Hebei China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, China
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Chen TT, Liu FF, Xiao DW, Jiang XY, Li P, Zhao SM, Hou BK, Li YJ. The Arabidopsis UDP-glycosyltransferase75B1, conjugates abscisic acid and affects plant response to abiotic stresses. PLANT MOLECULAR BIOLOGY 2020; 102:389-401. [PMID: 31894456 DOI: 10.1007/s11103-019-00953-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 12/20/2019] [Indexed: 05/03/2023]
Abstract
This study revealed that the Arabidopsis UGT75B1 plays an important role in modulating ABA activity by glycosylation when confronting stress environments. The cellular ABA content and activity can be tightly controlled in several ways, one of which is glycosylation by family 1 UDP-glycosyltransferases (UGTs). Previous analysis has shown UGT75B1 activity towards ABA in vitro. However, the biological role of UGT75B1 remains to be elucidated. Here, we characterized the function of UGT75B1 in abiotic stress responses via ABA glycosylation. GUS assay and qRT-PCR indicated that UGT75B1 is significantly upregulated by adverse conditions, such as osmotic stress, salinity and ABA. Overexpression of UGT75B1 in Arabidopsis leads to higher seed germination rates and seedling greening rates upon exposure to salt and osmotic stresses. In contrast, the big UGT75B1 overexpression plants are more sensitive under salt and osmotic stresses. Additionally, the UGT75B1 overexpression plants showed larger stomatal aperture and more water loss under drought condition, which can be explained by lower ABA levels examined in UGT75B1 OE plants in response to water deficit conditions. Consistently, UGT75B1 ectopic expression leads to downregulation of many ABA-responsive genes under stress conditions, including ABI3, ABI5 newly germinated seedlings and RD29A, KIN1, AIL1 in big plants. In summary, our results revealed that the Arabidopsis UGT75B1 plays an important role in coping with abiotic stresses via glycosylation of ABA.
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Affiliation(s)
- Ting-Ting Chen
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
| | - Fang-Fei Liu
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
| | - Dong-Wang Xiao
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
| | - Xiao-Yi Jiang
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
| | - Pan Li
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
- College of Pharmacy, Liaocheng University, Liaocheng, 252000, China
| | - Shu-Man Zhao
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
| | - Bing-Kai Hou
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
| | - Yan-Jie Li
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China.
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Wang F, Chen S, Liang D, Qu GZ, Chen S, Zhao X. Transcriptomic analyses of Pinus koraiensis under different cold stresses. BMC Genomics 2020; 21:10. [PMID: 31900194 PMCID: PMC6942419 DOI: 10.1186/s12864-019-6401-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 12/15/2019] [Indexed: 12/30/2022] Open
Abstract
Background Pinus koraiensis is an evergreen tree species with strong cold resistance. However, the transcriptomic patterns in response to cold stress are poorly understood for P. koraiensis. In this study, global transcriptome profiles were generated for P. koraiensis under cold stress (− 20 °C) over time by high-throughput sequencing. Results More than 763 million clean reads were produced, which assembled into a nonredundant data set of 123,445 unigenes. Among them, 38,905 unigenes had homology with known genes, 18,239 were assigned to 54 gene ontology (GO) categories and 18,909 were assigned to 25 clusters of orthologous groups (COG) categories. Comparison of transcriptomes of P. koraiensis seedlings grown at room temperature (20 °C) and low temperature (− 20 °C) revealed 9842 differential expressed genes (DEGs) in the 6 h sample, 9250 in the 24 h sample, and 9697 in the 48 h sample. The number of DEGs in the pairwise comparisons of 6 h, 24 h and 48 h was relatively small. The accuracy of the RNA-seq was validated by analyzing the expression patterns of 12 DEGs by quantitative real-time PCR (qRT-PCR). In this study, 34 DEGs (22 upregulated and 12 downregulated) were involved in the perception and transmission of cold signals, 96 DEGs (41 upregulated and 55 downregulated) encoding 8 transcription factors that regulated cold-related genes expression, and 27 DEGs (17 upregulated and 10 downregulated) were involved in antioxidant mechanisms in response to cold stress. Among them, the expression levels of c63631_g1 (annexin D1), c65620_g1 (alpha-amylase isozyme 3C), c61970_g1 (calcium-binding protein KIC), c51736_g1 (ABA), c58408_g1 (DREB3), c66599_g1 (DREB3), c67548_g2 (SOD), c55044_g1 (CAT), c71938_g2 (CAT) and c11358_g1 (GPX) first increased significantly and then decreased significantly with the extension of stress time. Conclusions A large number of DEGs were identified in P. koraiensis under cold stress, especially the DEGs involved in the perception and transmission of cold signals, the DEGs encoding TFs related to cold regulation and the DEGs removing ROS in antioxidation mechanisms. The transcriptome and digital expression profiling of P. koraiensis could facilitate the understanding of the molecular control mechanism related to cold responses and provide the basis for the molecular breeding of conifers.
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Affiliation(s)
- Fang Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, People's Republic of China
| | - Song Chen
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, People's Republic of China
| | - Deyang Liang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, People's Republic of China
| | - Guan-Zheng Qu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, People's Republic of China
| | - Su Chen
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, People's Republic of China.
| | - Xiyang Zhao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, People's Republic of China.
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Lim CW, Lee SC. ABA-Dependent and ABA-Independent Functions of RCAR5/PYL11 in Response to Cold Stress. FRONTIERS IN PLANT SCIENCE 2020; 11:587620. [PMID: 33101352 PMCID: PMC7545830 DOI: 10.3389/fpls.2020.587620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/09/2020] [Indexed: 05/04/2023]
Abstract
Arabidopsis thaliana has 14 abscisic acid (ABA) receptors-PYR1/PYLs/RCARs-which have diverse and redundant functions in ABA signaling; however, the precise role of these ABA receptors remains to be elucidated. Here, we report the functional characterization of RCAR5/PYL11 in response to cold stress. Expression of RCAR5 gene in dry seeds and leaves was ABA-dependent and ABA-independent, respectively. Under cold stress conditions, seed germination was negatively affected by the level of RCAR5 expression, which was dependent on ABA and was regulated by HAB1, OST1, and ABI5-downstream components of RCAR5 in ABA signaling. Leaves of RCAR5-overexpressing plants showed enhanced stomatal closure-independent of ABA-and high expression levels of cold, dehydration, and/or ABA-responsive genes compared to those of wild-type; these traits conferred enhanced freezing tolerance. Our data suggest that RCAR5 functions in response to cold stress by delaying seed germination and inducing rapid stomatal closure via ABA-dependent and ABA-independent pathways, respectively.
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31
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Jia KP, Dickinson AJ, Mi J, Cui G, Xiao TT, Kharbatia NM, Guo X, Sugiono E, Aranda M, Blilou I, Rueping M, Benfey PN, Al-Babili S. Anchorene is a carotenoid-derived regulatory metabolite required for anchor root formation in Arabidopsis. SCIENCE ADVANCES 2019; 5:eaaw6787. [PMID: 31807696 PMCID: PMC6881154 DOI: 10.1126/sciadv.aaw6787] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 09/25/2019] [Indexed: 05/09/2023]
Abstract
Anchor roots (ANRs) arise at the root-shoot junction and are the least investigated type of Arabidopsis root. Here, we show that ANRs originate from pericycle cells in an auxin-dependent manner and a carotenogenic signal to emerge. By screening known and assumed carotenoid derivatives, we identified anchorene, a presumed carotenoid-derived dialdehyde (diapocarotenoid), as the specific signal needed for ANR formation. We demonstrate that anchorene is an Arabidopsis metabolite and that its exogenous application rescues the ANR phenotype in carotenoid-deficient plants and promotes the growth of normal seedlings. Nitrogen deficiency resulted in enhanced anchorene content and an increased number of ANRs, suggesting a role of this nutrient in determining anchorene content and ANR formation. Transcriptome analysis and treatment of auxin reporter lines indicate that anchorene triggers ANR formation by modulating auxin homeostasis. Together, our work reveals a growth regulator with potential application to agriculture and a new carotenoid-derived signaling molecule.
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Affiliation(s)
- Kun-Peng Jia
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Sciences and Engineering Division, The BioActives Lab, Thuwal 23955-6900, Saudi Arabia
| | - Alexandra J. Dickinson
- Department of Biology and Howard Hughes Medical Institute, Duke University, Durham, NC 27708, USA
| | - Jianing Mi
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Sciences and Engineering Division, The BioActives Lab, Thuwal 23955-6900, Saudi Arabia
| | - Guoxin Cui
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division, Red Sea Research Center, Thuwal 23955-6900, Saudi Arabia
| | - Ting Ting Xiao
- King Abdullah University of Science and Technology, Division of Biological and Environmental Sciences and Engineering, Thuwal 23955-6900, Saudi Arabia
| | - Najeh M. Kharbatia
- King Abdullah University of Science and Technology (KAUST), Core Lab, Thuwal 23955-6900, Saudi Arabia
| | - Xiujie Guo
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Sciences and Engineering Division, The BioActives Lab, Thuwal 23955-6900, Saudi Arabia
| | - Erli Sugiono
- RWTH Aachen University, Institute of Organic Chemistry, 52074 Aachen, Germany
| | - Manuel Aranda
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division, Red Sea Research Center, Thuwal 23955-6900, Saudi Arabia
| | - Ikram Blilou
- King Abdullah University of Science and Technology, Division of Biological and Environmental Sciences and Engineering, Thuwal 23955-6900, Saudi Arabia
| | - Magnus Rueping
- King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering Division, KAUST Catalysis Center, Thuwal 23955-6900, Saudi Arabia
| | - Philip N. Benfey
- Department of Biology and Howard Hughes Medical Institute, Duke University, Durham, NC 27708, USA
| | - Salim Al-Babili
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Sciences and Engineering Division, The BioActives Lab, Thuwal 23955-6900, Saudi Arabia
- Corresponding author.
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Tan X, Long W, Zeng L, Ding X, Cheng Y, Zhang X, Zou X. Melatonin-Induced Transcriptome Variation of Rapeseed Seedlings under Salt Stress. Int J Mol Sci 2019; 20:ijms20215355. [PMID: 31661818 PMCID: PMC6862158 DOI: 10.3390/ijms20215355] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/16/2019] [Accepted: 10/23/2019] [Indexed: 12/20/2022] Open
Abstract
Salt stress inhibits the production of all crop species, including rapeseed (Brassica napus L.), the second most widely planted oil crop species. Although melatonin was confirmed to alleviate salt stress in rapeseed seedlings recently, the mechanism governing the expression levels remains unknown. Therefore, the melatonin-induced transcriptome variation of salt-stressed seedlings was explored. In this study, the transcriptomes of leaves and roots under control (CK), salt (125 mM NaCl, ST) and melatonin (125 mM NaCl plus 50 µM melatonin, MS) treatments were evaluated by using next-generation sequencing techniques. After conducting comparisons of gene expression in the roots and leaves between MS and ST, the differentially expressed gene (DEG) pools were screened. Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses highlighted the significant pathways, which were mainly related to plant hormone synthesis and signal transduction, lignin and fatty acid metabolism. The functional genes in the objective KEGG pathways were identified. Furthermore, members of several transcription factor (TF) families participated in the response process. Combined with the hormone (campesterol (CS), jasmonic acid (JA), and gibberellic acid 3 (GA3)) contents measured in the seedlings, it could be concluded that melatonin induced changes in the intrinsic hormone metabolic network, which promoted seedling growth. Thus, this study identified new candidate genes and pathways active during the interactions between melatonin and salt stress, which provide clues for disclosing melatonin’s function in resistance to salt injury. Our results contribute to developing a practical method for sustainable agriculture on saline lands.
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Affiliation(s)
- Xiaoyu Tan
- Key Lab of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- College of Plant Science and Technology of Huazhong Agricultural University, Wuhan 430070, China.
| | - Weihua Long
- Key Lab of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
- Key Lab of Cotton and Rapeseed (Nanjing) of Ministry of Agriculture and Rural Affairs, Institute of the Industrial Crops, Jiangsu Academy of Agriculture Sciences, Nanjing 210014, China.
| | - Liu Zeng
- Key Lab of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
| | - Xiaoyu Ding
- Key Lab of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
| | - Yong Cheng
- Key Lab of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
| | - Xuekun Zhang
- Key Lab of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
| | - Xiling Zou
- Key Lab of Biology and Genetic Improvement of Oil Crops of Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China.
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Sicilia A, Testa G, Santoro DF, Cosentino SL, Lo Piero AR. RNASeq analysis of giant cane reveals the leaf transcriptome dynamics under long-term salt stress. BMC PLANT BIOLOGY 2019; 19:355. [PMID: 31416418 PMCID: PMC6694640 DOI: 10.1186/s12870-019-1964-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 08/07/2019] [Indexed: 05/21/2023]
Abstract
BACKGROUND To compensate for the lack of information about the molecular mechanism involved in Arundo donax L. response to salt stress, we de novo sequenced, assembled and analyzed the A. donax leaf transcriptome subjected to two levels of long-term salt stress (namely, S3 severe and S4 extreme). RESULTS The picture that emerges from the identification of differentially expressed genes is consistent with a salt dose-dependent response. Hence, a deeper re-programming of the gene expression occurs in those plants grew at extreme salt level than in those subjected to severe salt stress, probably representing for them an "emergency" state. In particular, we analyzed clusters related to salt sensory and signaling, transcription factors, hormone regulation, Reactive Oxygen Species (ROS) scavenging, osmolyte biosynthesis and biomass production, all of them showing different regulation either versus untreated plants or between the two treatments. Importantly, the photosynthesis is strongly impaired in samples treated with both levels of salinity stress. However, in extreme salt conditions, a dramatic switch from C3 Calvin cycle to C4 photosynthesis is likely to occur, this probably being the more impressive finding of our work. CONCLUSIONS Considered the distinct response to salt doses, genes either involved in severe or in extreme salt response could constitute useful markers of the physiological status of A. donax to deepen our understanding of its biology and productivity in salinized soil. Finally, many of the unigenes identified in the present study have the potential to be used for the development of A. donax varieties with improved productivity and stress tolerance, in particular the knock out of the GTL1 gene acting as negative regulator of water use efficiency has been proposed as good target for genome editing.
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Affiliation(s)
- Angelo Sicilia
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Giorgio Testa
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Danilo Fabrizio Santoro
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Salvatore Luciano Cosentino
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Angela Roberta Lo Piero
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy.
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Long H, Zheng Z, Zhang Y, Xing P, Wan X, Zheng Y, Li L. An abscisic acid (ABA) homeostasis regulated by its production, catabolism and transport in peanut leaves in response to drought stress. PLoS One 2019; 14:e0213963. [PMID: 31242187 PMCID: PMC6594590 DOI: 10.1371/journal.pone.0213963] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 06/11/2019] [Indexed: 01/23/2023] Open
Abstract
ABA is an important messenger that acts as a signaling mediator for regulating the adaptive response of plants to drought stress. Two production pathways, de novo biosynthesis and hydrolysis of glucose-conjugated ABA by β-glucosidase (BG), increase cellular ABA levels in plants. ABA catabolism via hydroxylation by 8’-hydroxylase (CYP707A), or conjugation by uridine diphosphate glucosyltransferase (UGT), decreases cellular ABA levels. The transport of ABA through ATP-binding cassette (ABC)-containing transporter proteins, members of ABC transporter G family (ABCG), across plasma membrane (PM) is another important pathway to regulate cellular ABA levels. In this study, based on our previously constructed transcriptome of peanut leaves in response to drought stress, fourteen candidate genes involved in ABA production (including AhZEP, AhNCED1 and AhNCED3, AhABA2, AhAAO1 and AhAAO2, AhABA3, AhBG11 and AhBG24), catabolism (including AhCYP707A3, AhUGT71K1 and AhUGT73B4) and transport (including AhABCG22-1 and AhABCG22-2), were identified homologously and phylogenetically, and further analyzed at the transcriptional level by real-time RT-PCR, simultaneously determining ABA levels in peanut leaves in response to drought. The high sequence identity and very similar subcellular localization of the proteins deduced from 14 identified genes involved in ABA production, catabolism and transport with the reported corresponding enzymes in databases suggest their similar roles in regulating cellular ABA levels. The expression analysis showed that the transcripts of AhZEP, AhNCED1, AhAAO2 and AhABA3 instead of AhABA2, AhNCED3 and AhAAO1 in peanut leaves increased significantly in response to drought stress; and that the AhBG11 and AhBG24 mRNA levels were rapidly and significantly up-regulated, with a 4.83- and 4.58-fold increase, respectively at 2-h of drought stress. The genes involved in ABA catabolism AhCYP707A3, AhUGT71K1 instead of AhUGT73B4 were significantly induced in response to drought stress. The expression of two closely related peanut ABCG genes, AhABCG22.1 and AhABCG22.2, was significantly up-regulated in response to drought stress. The ABA levels rapidly began to accumulate within 2 h (a 56.6-fold increase) from the start of drought stress, and peaked at 10 h of the stress. The highly and rapidly stress up-regulated expressions of genes involved in ABA production and transport, particularly AhNCED1, AhBG11 and AhBG24, and AhABCG22.1 and AhABCG22.2, might contribute to the rapid ABA accumulation in peanut leaves in response to drought. In response to drought stress, ABA accumulation levels in peanut leaves agree well with the up-regulated expressions of ABA-producing genes (AhZEP, AhNCED1, AhAAO2, AhABA3, AhBG11 and AhBG24) and PM-localized ABA importer genes (AhABCG22-1 and AhABCG22-2), in spite of the simultaneously induced ABA catabolic genes (AhCYP707A3 and AhUGT71K1), although the induction of catabolic genes was much lower than that of biosynthetic gene (AhNCED1). This difference in induction kinetics of gene expression may define the significant accumulation of drought-induced ABA levels. These results suggest that ABA homeostasis in peanut leaves in response to drought maintained through a balance between the production, catabolism and transport, rather than simply by the biosynthesis.
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Affiliation(s)
- Haitao Long
- School of Life Sciences, South China Normal University, Guangzhou, China
| | - Zhao Zheng
- College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Yajun Zhang
- College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Pengzhan Xing
- College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Xiaorong Wan
- College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
- * E-mail: (XW); (LL)
| | - Yixiong Zheng
- College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Ling Li
- School of Life Sciences, South China Normal University, Guangzhou, China
- * E-mail: (XW); (LL)
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Shkolnik D, Finkler A, Pasmanik-Chor M, Fromm H. CALMODULIN-BINDING TRANSCRIPTION ACTIVATOR 6: A Key Regulator of Na + Homeostasis during Germination. PLANT PHYSIOLOGY 2019; 180:1101-1118. [PMID: 30894419 PMCID: PMC6548231 DOI: 10.1104/pp.19.00119] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 03/08/2019] [Indexed: 05/06/2023]
Abstract
Salinity impairs seed germination and seedling establishment. We investigated the role of Arabidopsis (Arabidopsis thaliana) CALMODULIN-BINDING TRANSCRIPTION ACTIVATOR 6 (CAMTA6) in salinity stress responses during early germination. Compared with the wild type, the camta6-4 and camta6-5 mutants were more tolerant to NaCl and abscisic acid (ABA) and accumulated less Na+ In contrast, 4- to 11-d-old camta6 seedlings were more sensitive to NaCl. In camta6, expression of HIGH-AFFINITY K+ TRANSPORTER1 (AtHKT1;1), encoding an Na+/K+ transporter, was restricted to the radicles and was not enhanced by NaCl or ABA. During germination, the camta6 hkt1 double mutant was as sensitive as the wild type and hkt1 to NaCl, suggesting that HKT1;1 is crucial for the salt tolerance of camta6 An ABA response element in the HKT1;1 promoter was found to be indispensable for the enhanced expression of the gene in response to NaCl and to ABA. Transcriptome analysis of the wild type and camta6-5 with and without salt treatment revealed 1,020 up-regulated and 1,467 down-regulated salt-responsive genes in the wild type. Among these, 638 up-regulated and 1,242 down-regulated genes were classified as CAMTA6-dependent. Expression of several known salt stress-associated genes, including SALT OVERLY SENSITIVE1 and Na+/H+ ANTIPORTER, was impaired in camta6 mutants. Bioinformatics analysis of the 5' upstream sequences of the salt-responsive CAMTA6-dependent up-regulated genes revealed the CACGTGTC motif as the most prominent element, representing an ABA response element and a potential CAMTA-binding site. We suggest that CAMTA6 regulates, directly or indirectly, the expression of most of the salt-responsive genes in germinating seeds, including genes that are crucial for Na+ homeostasis and salt stress tolerance.
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Affiliation(s)
- Doron Shkolnik
- School of Plant Sciences and Food Security, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Aliza Finkler
- School of Plant Sciences and Food Security, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Metsada Pasmanik-Chor
- Bioinformatics Unit, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Hillel Fromm
- School of Plant Sciences and Food Security, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
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Differential Function of Endogenous and Exogenous Abscisic Acid during Bacterial Pattern-Induced Production of Reactive Oxygen Species in Arabidopsis. Int J Mol Sci 2019; 20:ijms20102544. [PMID: 31126160 PMCID: PMC6566928 DOI: 10.3390/ijms20102544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 05/13/2019] [Accepted: 05/13/2019] [Indexed: 01/09/2023] Open
Abstract
Abscisic acid (ABA) plays important roles in positively or negatively regulating plant disease resistance to pathogens. Here, we reassess the role of endogenous and exogenous ABA by using: 35S::ABA2, a previously reported transgenic Arabidopsis line with increased endogenous ABA levels; aba2-1, a previously reported ABA2 mutant with reduced endogenous ABA levels; and exogenous application of ABA. We found that bacterial susceptibility promoted by exogenous ABA was suppressed in 35S::ABA2 plants. The 35S::ABA2 and aba2-1 plants displayed elevated and reduced levels, respectively, of bacterial flagellin peptide (flg22)-induced H2O2. Surprisingly, ABA pre-treatment reduced flg22-induced H2O2 generation. Exogenous, but not endogenous ABA, increased catalase activity. Loss of nicotinamide adenine dinucleotide phosphate oxidase genes, RBOHD and RBOHF, restored exogenous ABA-promoted bacterial susceptibility of 35S::ABA2 transgenic plants. In addition, endogenous and exogenous ABA had similar effects on callose deposition and salicylic acid (SA) signaling. These results reveal an underlying difference between endogenous and exogenous ABA in regulating plant defense responses. Given that some plant pathogens are able to synthesize ABA and affect endogenous ABA levels in plants, our results highlight the importance of reactive oxygen species in the dual function of ABA during plant-pathogen interactions.
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37
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Zhang Z, Kang C, Zhang S, Li X. Transcript analyses reveal a comprehensive role of abscisic acid in modulating fruit ripening in Chinese jujube. BMC PLANT BIOLOGY 2019; 19:189. [PMID: 31068143 PMCID: PMC6505321 DOI: 10.1186/s12870-019-1802-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/26/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND Chinese jujube (Ziziphus jujuba Mill.) is a non-climacteric fruit; however, the underlying mechanism of ripening and the role of abscisic acid involved in this process are not yet understood for this species. RESULTS In the present study, a positive correlation between dynamic changes in endogenous ABA and the onset of jujube ripening was determined. Transcript analyses suggested that the expression balance among genes encoding nine-cis-epoxycarotenoid dioxygenase (ZjNCED3), ABA-8'-hydroxylase (ZjCYP707A2), and beta-glucosidase (ZjBG4, ZjBG5, ZjBG8, and ZjBG9) has an important role in maintaining ABA accumulation, while the expression of a receptor (ZjPYL8), protein phosphatase 2C (ZjPP2C4-8), and sucrose nonfermenting 1-related protein kinase 2 (ZjSnRK2-2 and ZjSnRK2-5) is important in regulating fruit sensitivity to ABA applications. In addition, white mature 'Dongzao' fruit were harvested and treated with 50 mg L- 1 ABA or 50 mg L- 1 nordihydroguaiaretic acid (NDGA) to explore the role of ABA in jujube fruit ripening. By comparative transcriptome analyses, 1103 and 505 genes were differentially expressed in response to ABA and NDGA applications on the 1st day after treatment, respectively. These DEGs were associated with photosynthesis, secondary, lipid, cell wall, and starch and sugar metabolic processes, suggesting the involvement of ABA in modulating jujube fruit ripening. Moreover, ABA also exhibited crosstalk with other phytohormones and transcription factors, indicating a regulatory network for jujube fruit ripening. CONCLUSIONS Our study further elucidated ABA-associated metabolic and regulatory processes. These findings are helpful for improving strategies for jujube fruit storage and for gaining insights into understand complex non-climacteric fruit ripening processes.
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Affiliation(s)
- Zhong Zhang
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
- Key Comprehensive Laboratory of Forestry of Shaanxi Province, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Chenxuan Kang
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Shuyi Zhang
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
- Forestry Administration of Linwei District, Weinan, 714000 Shaanxi China
| | - Xingang Li
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
- Key Comprehensive Laboratory of Forestry of Shaanxi Province, Northwest A&F University, Yangling, 712100 Shaanxi China
- Research Centre for Jujube Engineering and Technology of State Forestry and Grassland Administration, Northwest A&F University, Yangling, 712100 Shaanxi China
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Chen Z, Zhao PX, Miao ZQ, Qi GF, Wang Z, Yuan Y, Ahmad N, Cao MJ, Hell R, Wirtz M, Xiang CB. SULTR3s Function in Chloroplast Sulfate Uptake and Affect ABA Biosynthesis and the Stress Response. PLANT PHYSIOLOGY 2019; 180:593-604. [PMID: 30837346 PMCID: PMC6501079 DOI: 10.1104/pp.18.01439] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 02/28/2019] [Indexed: 05/20/2023]
Abstract
Plants are major sulfur reducers in the global sulfur cycle. Sulfate, the major natural sulfur source in soil, is absorbed by plant roots and transported into plastids, where it is reduced and assimilated into Cys for further metabolic processes. Despite its importance, how sulfate is transported into plastids is poorly understood. We previously demonstrated using single Arabidopsis (Arabidopsis thaliana) genetic mutants that each member of the sulfate transporter (SULTR) subfamily 3 was able to transport sulfate across the chloroplast envelope membrane. To resolve the function of SULTR3s, we constructed a sultr3 quintuple mutant completely knocking out all five members of the subfamily. Here we report that all members of the SULTR3 subfamily show chloroplast membrane localization. Sulfate uptake by chloroplasts of the quintuple mutant is reduced by more than 50% compared with the wild type. Consequently, Cys and abscisic acid (ABA) content are reduced to ∼67 and ∼20% of the wild-type level, respectively, and strong positive correlations are found among sulfate, Cys, and ABA content. The sultr3 quintuple mutant shows obvious growth retardation with smaller rosettes and shorter roots. Seed germination of the sultr3 quintuple mutant is hypersensitive to exogenous ABA and salt stress, but is rescued by sulfide supplementation. Furthermore, sulfate-induced stomatal closure is abolished in the quintuple mutant, strongly suggesting that chloroplast sulfate is required for stomatal closure. Our genetic analyses unequivocally demonstrate that sulfate transporter subfamily 3 is responsible for more than half of the chloroplast sulfate uptake and influences downstream sulfate assimilation and ABA biosynthesis.
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Affiliation(s)
- Zhen Chen
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Ping-Xia Zhao
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Zi-Qing Miao
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Guo-Feng Qi
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Zhen Wang
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
- Shanghai Center for Plant Stress Biology, CAS, Shanghai 201602, China
| | - Yang Yuan
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Nisar Ahmad
- Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
- Department of Biotechnology, University of Science and Technology, 28100 Bannu, Pakistan
| | - Min-Jie Cao
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
- Shanghai Center for Plant Stress Biology, CAS, Shanghai 201602, China
| | - Ruediger Hell
- Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Markus Wirtz
- Centre for Organismal Studies Heidelberg, Heidelberg University, 69120 Heidelberg, Germany
| | - Cheng-Bin Xiang
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
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Tunsagool P, Jutidamrongphan W, Phaonakrop N, Jaresitthikunchai J, Roytrakul S, Leelasuphakul W. Insights into stress responses in mandarins triggered by Bacillus subtilis cyclic lipopeptides and exogenous plant hormones upon Penicillium digitatum infection. PLANT CELL REPORTS 2019; 38:559-575. [PMID: 30715581 DOI: 10.1007/s00299-019-02386-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/25/2019] [Indexed: 05/11/2023]
Abstract
Bacillus subtilis CLP extract activates defense gene expression and increases the unique protein production involving in pathways of ISR, SAR, ubiquitin-proteasome system, and glycolysis for stress responses in flavedo tissues. Cyclic lipopeptides (CLPs) of Bacillus subtilis ABS-S14 had ability to activate plant defensive pathways, increase resistance and control green mold rot caused by Penicillium digitatum in mandarin fruit. The current study investigated transcriptional and proteomic data to highlight the unique induction effect of CLPs produced by B. subtilis ABS-S14 on the defense mechanism of mandarins in response to P. digitatum attack, and their differences from those following the exogenous plant hormone application. The proteomic patterns of the flavedo tissues as affected by Bacillus CLP extract, salicylic acid (SA), methyl jasmonate (MeJA), and ethephon (Et) were explored. qPCR analysis revealed the great effects of CLP extract in enhancing the transcription of PAL, ACS1, GLU, POD, and PR1. Tryptic peptides by LC-MS analysis between treatments with and without fungal infection were compared. B. subtilis CLP extract empowered the plant's immune response to wound stress by the significant production of calmodulin-binding receptor-like cytoplasmic kinase 2, molybdenum cofactor sulfurase, and NAD+-dependent glyceraldehyde-3-phosphate dehydrogenase. Ubiquitin carrier protein abundance was developed only in the treated flavedo with CLP extract coupled with P. digitatum infection. The gene expression and overall proteome findings involving pathways of ubiquitin proteasome system, ISR, SAR, and energy production provide a new insight into the molecular mechanisms of the antagonist B. subtilis ABS-S14 inducing resistance against green mold in mandarins.
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Affiliation(s)
- Paiboon Tunsagool
- Department of Biochemistry, Prince of Songkla University, Songkhla, 90112, Thailand
| | | | - Narumon Phaonakrop
- Proteomics Research Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Thailand Science Park (TSP), Pathum Thani, 12120, Thailand
| | - Janthima Jaresitthikunchai
- Proteomics Research Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Thailand Science Park (TSP), Pathum Thani, 12120, Thailand
| | - Sittiruk Roytrakul
- Proteomics Research Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Thailand Science Park (TSP), Pathum Thani, 12120, Thailand
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Zhu YX, Jia JH, Yang L, Xia YC, Zhang HL, Jia JB, Zhou R, Nie PY, Yin JL, Ma DF, Liu LC. Identification of cucumber circular RNAs responsive to salt stress. BMC PLANT BIOLOGY 2019; 19:164. [PMID: 31029105 PMCID: PMC6486992 DOI: 10.1186/s12870-019-1712-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 03/11/2019] [Indexed: 05/05/2023]
Abstract
BACKGROUND Circular RNAs (circRNAs) are 3'-5' head-to-tail covalently closed non-coding RNA that have been proved to play essential roles in many cellular and developmental processes. However, no information relate to cucumber circRNAs is available currently, especially under salt stress condition. RESULTS In this study, we sequenced circRNAs in cucumber and a total of 2787 were identified, with 1934 in root and 44 in leaf being differentially regulated under salt stress. Characteristics analysis of these circRNAs revealed following features: most of them are exon circRNAs (79.51%) and they prefer to arise from middle exon(s) of parent genes (2035/2516); moreover, most of circularization events (88.3%) use non-canonical-GT/AG splicing signals; last but not least, pairing-driven circularization is not the major way to generate cucumber circRNAs since very few circRNAs (18) contain sufficient flanking complementary sequences. Annotation and enrichment analysis of both parental genes and target mRNAs were launched to uncover the functions of differentially expressed circRNAs induced by salt stress. The results showed that circRNAs may be paly roles in salt stress response by mediating transcription, signal transcription, cell cycle, metabolism adaptation, and ion homeostasis related pathways. Moreover, circRNAs may function to regulate proline metabolisms through regulating associated biosynthesis and degradation genes. CONCLUSIONS The present study identified large number of cucumber circRNAs and function annotation revealed their possible biological roles in response to salt stress. Our findings will lay a solid foundation for further structure and function studies of cucumber circRNAs.
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Affiliation(s)
- Yong-Xing Zhu
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
| | - Jian-Hua Jia
- College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Lei Yang
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
| | - Yu-Chen Xia
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
| | - Hui-Li Zhang
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
| | - Jin-Bu Jia
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong China
| | - Ran Zhou
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
| | - Pei-Yao Nie
- Biomarker Technologies, Beijing, 101300 China
| | - Jun-Liang Yin
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
| | - Dong-Fang Ma
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
| | - Le-Cheng Liu
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland/College of Horticulture and Gardening/College of Agriculture, Yangtze University, Jingzhou, 434000 Hubei China
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Wan X, Zou LH, Zheng BQ, Wang Y. Circadian Regulation of Alternative Splicing of Drought-Associated CIPK Genes in Dendrobium catenatum (Orchidaceae). Int J Mol Sci 2019; 20:ijms20030688. [PMID: 30764546 PMCID: PMC6386984 DOI: 10.3390/ijms20030688] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 01/31/2019] [Accepted: 02/01/2019] [Indexed: 01/23/2023] Open
Abstract
Dendrobium catenatum, an epiphytic and lithophytic species, suffers frequently from perennial shortage of water in the wild. The molecular mechanisms of this orchid’s tolerance to abiotic stress, especially drought, remain largely unknown. It is well-known that CBL-interacting protein kinase (CIPKs) proteins play important roles in plant developmental processes, signal transduction, and responses to abiotic stress. To study the CIPKs’ functions for D. catenatum, we first identified 24 CIPK genes from it. We divided them into three subgroups, with varying intron numbers and protein motifs, based on phylogeny analysis. Expression patterns of CIPK family genes in different tissues and in response to either drought or cold stresses suggested DcaCIPK11 may be associated with signal transduction and energy metabolism. DcaCIPK9, -14, and -16 are predicted to play critical roles during drought treatment specifically. Furthermore, transcript expression abundances of DcaCIPK16 showed polar opposites during day and night. Whether under drought treatment or not, DcaCIPK16 tended to emphatically express transcript1 during the day and transcript3 at night. This implied that expression of the transcripts might be regulated by circadian rhythm. qRT-PCR analysis also indicated that DcaCIPK3, -8, and -20 were strongly influenced by circadian rhythmicity. In contrast with previous studies, for the first time to our knowledge, our study revealed that the major CIPK gene transcript expressed was not always the same and was affected by the biological clock, providing a different perspective on alternative splicing preference.
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Affiliation(s)
- Xiao Wan
- Research Institute of Forestry; State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing 100091, China.
| | - Long-Hai Zou
- Research Institute of Forestry; State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing 100091, China.
| | - Bao-Qiang Zheng
- Research Institute of Forestry; State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing 100091, China.
| | - Yan Wang
- Research Institute of Forestry; State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing 100091, China.
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Batool S, Uslu VV, Rajab H, Ahmad N, Waadt R, Geiger D, Malagoli M, Xiang CB, Hedrich R, Rennenberg H, Herschbach C, Hell R, Wirtz M. Sulfate is Incorporated into Cysteine to Trigger ABA Production and Stomatal Closure. THE PLANT CELL 2018; 30:2973-2987. [PMID: 30538155 PMCID: PMC6354274 DOI: 10.1105/tpc.18.00612] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 11/30/2018] [Indexed: 05/18/2023]
Abstract
Plants close stomata when root water availability becomes limiting. Recent studies have demonstrated that soil-drying induces root-to-shoot sulfate transport via the xylem and that sulfate closes stomata. Here we provide evidence for a physiologically relevant signaling pathway that underlies sulfate-induced stomatal closure in Arabidopsis (Arabidopsis thaliana). We uncovered that, in the guard cells, sulfate activates NADPH oxidases to produce reactive oxygen species (ROS) and that this ROS induction is essential for sulfate-induced stomata closure. In line with the function of ROS as the second-messenger of abscisic acid (ABA) signaling, sulfate does not induce ROS in the ABA-synthesis mutant, aba3-1, and sulfate-induced ROS were ineffective at closing stomata in the ABA-insensitive mutant abi2-1 and a SLOW ANION CHANNEL1 loss-of-function mutant. We provided direct evidence for sulfate-induced accumulation of ABA in the cytosol of guard cells by application of the ABAleon2.1 ABA sensor, the ABA signaling reporter ProRAB18:GFP, and quantification of endogenous ABA marker genes. In concordance with previous studies, showing that ABA DEFICIENT3 uses Cys as the substrate for activation of the ABSCISIC ALDEHYDE OXIDASE3 (AAO3) enzyme catalyzing the last step of ABA production, we demonstrated that assimilation of sulfate into Cys is necessary for sulfate-induced stomatal closure and that sulfate-feeding or Cys-feeding induces transcription of NINE-CIS-EPOXYCAROTENOID DIOXYGENASE3, limiting the synthesis of the AAO3 substrate. Consequently, Cys synthesis-depleted mutants are sensitive to soil-drying due to enhanced water loss. Our data demonstrate that sulfate is incorporated into Cys and tunes ABA biosynthesis in leaves, promoting stomatal closure, and that this mechanism contributes to the physiological water limitation response.
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Affiliation(s)
- Sundas Batool
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Veli Vural Uslu
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Hala Rajab
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Nisar Ahmad
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
- Department of Biotechnology, University of Science and Technology, 28100 Bannu, Pakistan
| | - Rainer Waadt
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Dietmar Geiger
- Institute for Molecular Plant Physiology and Biophysics, Julius-von-Sachs-Institute, Biocenter, University of Wuerzburg, 97082 Wuerzburg, Germany
| | - Mario Malagoli
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, 35020 Padova, Italy
| | - Cheng-Bin Xiang
- School of Life Sciences and Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province 230027, China
| | - Rainer Hedrich
- Institute for Molecular Plant Physiology and Biophysics, Julius-von-Sachs-Institute, Biocenter, University of Wuerzburg, 97082 Wuerzburg, Germany
| | - Heinz Rennenberg
- Institut für Forstwissenschaften, Albert-Ludwigs-Universität Freiburg, 79110 Freiburg, Germany
| | - Cornelia Herschbach
- Institut für Forstwissenschaften, Albert-Ludwigs-Universität Freiburg, 79110 Freiburg, Germany
| | - Ruediger Hell
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Markus Wirtz
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
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Khan S, Mao Y, Gao D, Riaz S, Niaz Z, Tang L, Khan S, Wang D. Identification of proteins responding to pathogen-infection in the red alga Pyropia yezoensis using iTRAQ quantitative proteomics. BMC Genomics 2018; 19:842. [PMID: 30482156 PMCID: PMC6260746 DOI: 10.1186/s12864-018-5229-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 11/07/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Pyropia yezoensis is an important marine crop which, due to its high protein content, is widely used as a seafood in China. Unfortunately, red rot disease, caused by Pythium porphyrae, seriously damages P. yezoensis farms every year in China, Japan, and Korea. Proteomic methods are often used to study the interactions between hosts and pathogens. Therefore, an iTRAQ-based proteomic analysis was used to identify pathogen-responsive proteins following the artificial infection of P. yezoensis with P. porphyrae spores. RESULTS A total of 762 differentially expressed proteins were identified, of which 378 were up-regulated and 384 were down-regulated following infection. A large amount of these proteins were involved in disease stress, carbohydrate metabolism, cell signaling, chaperone activity, photosynthesis, and energy metabolism, as annotated in the KEGG database. Overall, the data showed that P. yezoensis resists infection by inhibiting photosynthesis, and energy and carbohydrate metabolism pathways, as supported by changes in the expression levels of related proteins. The expression data are available via ProteomeXchange with the identifier PXD009363. CONCLUSIONS The current data provide an overall summary of the red algae responses to pathogen infection. This study improves our understanding of infection resistance in P. yezoensis, and may help in increasing the breeding of P. porphyrae-infection tolerant macroalgae.
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Affiliation(s)
- Sohrab Khan
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
| | - Yunxiang Mao
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003 China
| | - Dong Gao
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
| | - Sadaf Riaz
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
| | - Zeeshan Niaz
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
| | - Lei Tang
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
| | - Sohaib Khan
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
| | - Dongmei Wang
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao, 266003 China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237 China
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Woldesemayat AA, Ntwasa M. Pathways and Network Based Analysis of Candidate Genes to Reveal Cross-Talk and Specificity in the Sorghum ( Sorghum bicolor (L.) Moench) Responses to Drought and It's Co-occurring Stresses. Front Genet 2018; 9:557. [PMID: 30515190 PMCID: PMC6255970 DOI: 10.3389/fgene.2018.00557] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Accepted: 10/31/2018] [Indexed: 12/01/2022] Open
Abstract
Drought alone or in combination with other stresses forms the major crop production constraint worldwide. Sorghum, one of the most important cereal crops is affected by drought alone or in combination with co-occurring stresses; notwithstanding, sorghum has evolved adaptive responses to combined stresses. Furthermore, an impressive number of sorghum genes have been investigated for drought tolerance. However, the molecular mechanism underling drought response remains poorly understood. We employed a systems biology approach to elucidate regulatory and broad functional features of these genes. Their interaction network would provide insight into understanding the molecular mechanisms of drought tolerance and underpinning signal pathways. Functional analysis was undertaken to determine significantly enriched genesets for pathways involved in drought tolerance. Analysis of distinct pathway cross-talk network was performed and drought-specific subnetwork was extracted. Investigation of various data sources such as gene expression, regulatory pathways, sorghumCyc, sorghum protein-protein interaction (PPI) and Gene Ontology (GO) revealed 14 major drought stress related hub genes (DSRhub genes). Significantly enriched genesets have shown association with various biological processes underlying drought-related responses. Key metabolic pathways were significantly enriched in the drought-related genes. Systematic analysis of pathways cross-talk and gene interaction network revealed major cross-talk pathway modules associated with drought tolerance. Further investigation of the major DSRhub genes revealed distinct regulatory genes such as ZEP, NCED, AAO, and MCSU and CYP707A1. These were involved in the regulation of ABA biosynthesis and signal transduction. Other protein families, namely, aldehyde and alcohol dehydrogenases, mitogene activated protein kinases (MAPKs), and Ribulose-1,5-biphosphate carboxylase (RuBisCO) were shown to be involved in the drought-related responses. This shows a diversity of complex functional features in sorghum to respond to various abiotic stresses. Finally, we constructed a drought-specific subnetwork, characterized by unique candidate genes that were associated with DSRhub genes. According to our knowledge, this is the first in sorghum drought investigation that introduces pathway and network-based candidate gene approach for analysis of drought tolerance. We provide novel information about pathways cross-talk and signaling networks used in further systems level analysis for understanding the molecular mechanism behind drought tolerance and can, therefore, be adapted to other model and non-model crops.
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Affiliation(s)
- Adugna Abdi Woldesemayat
- Department of Life and Consumer Sciences, College of Agriculture and Environmental Sciences, University of South Africa, Johannesburg, South Africa
| | - Monde Ntwasa
- Department of Life and Consumer Sciences, College of Agriculture and Environmental Sciences, University of South Africa, Johannesburg, South Africa
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45
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Kovinich N, Durkin P. Hormone deficient mutants have distinct flavonoid proportion fingerprints in response to abiotic stress. PLANT SIGNALING & BEHAVIOR 2018; 13:e1542241. [PMID: 30418081 PMCID: PMC6296356 DOI: 10.1080/15592324.2018.1542241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 10/23/2018] [Indexed: 06/01/2023]
Abstract
Distinct flavonoid profiles (a.k.a. 'fingerprints') are produced in the vegetative tissues of plants in response to different abiotic stresses, yet it remained unknown whether flavonoid levels or their relative their proportions are more tightly regulated in response to stress. Here we show that the relative proportions of 19 flavonoids were more stringently controlled compared to their levels in response to variety of abiotic stresses. We screened mutants that are deficient in the biosynthesis of the stress response hormones ABA, Eth, JA, and GA by growing them in an abiotic stress condition that induces the biosynthesis of a wide variety of flavonoids and found that mutants deficient in a particular hormone generally had a distinct flavonoid proportion fingerprint. Our results suggest that flavonoid proportion fingerprints of uncharacterized mutants could be used to predict gene involvement in particular hormone pathways that signal responses to abiotic stress.
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Affiliation(s)
- Nik Kovinich
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV, USA
| | - Paige Durkin
- Department of Biology, West Virginia University, Morgantown, WV, USA
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46
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Watanabe S, Sato M, Sawada Y, Tanaka M, Matsui A, Kanno Y, Hirai MY, Seki M, Sakamoto A, Seo M. Arabidopsis molybdenum cofactor sulfurase ABA3 contributes to anthocyanin accumulation and oxidative stress tolerance in ABA-dependent and independent ways. Sci Rep 2018; 8:16592. [PMID: 30413758 PMCID: PMC6226459 DOI: 10.1038/s41598-018-34862-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 10/18/2018] [Indexed: 01/05/2023] Open
Abstract
Arabidopsis ABA3 is an enzyme involved in the synthesis of the sulfurated form of the molybdenum (Mo) cofactor (MoCo), which is required for the enzymatic activity of so-called Mo enzymes such as aldehyde oxidase (AO) and xanthine dehydrogenase (XDH). It has been reported that AO and XDH are essential for the biosynthesis of the bioactive compounds, ABA and allantoin, respectively. However, aba3 mutants often exhibit pleiotropic phenotypes that are not explained by defects in ABA and/or allantoin biosynthesis, leading us to hypothesize that ABA3 regulates additional metabolic pathways. To reveal the currently unidentified functions of ABA3 we compared transcriptome and metabolome of the Arabidopsis aba3 mutant with those of wild type and a typical ABA-deficient mutant aba2. We found that endogenous levels of anthocyanins, members of the flavonoid group, were significantly lower in the aba3 mutant than in the wild type or the aba2 mutant under oxidative stress. In contrast, mutants defective in the AO and XDH holoenzymes accumulated significantly higher levels of anthocyanins when compared with aba3 mutant under the same conditions. Our findings shed light on a key role of ABA3 in the ABA- and allantoin-independent accumulation of anthocyanins during stress responses.
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Affiliation(s)
- Shunsuke Watanabe
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Muneo Sato
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Yuji Sawada
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Maho Tanaka
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Akihiro Matsui
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Yuri Kanno
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Masami Yokota Hirai
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
| | - Motoaki Seki
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Atsushi Sakamoto
- Department of Mathematics and Life Sciences, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Mitsunori Seo
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan.
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Ma H, Liu C, Li Z, Ran Q, Xie G, Wang B, Fang S, Chu J, Zhang J. ZmbZIP4 Contributes to Stress Resistance in Maize by Regulating ABA Synthesis and Root Development. PLANT PHYSIOLOGY 2018; 178:753-770. [PMID: 30126870 PMCID: PMC6181033 DOI: 10.1104/pp.18.00436] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 08/07/2018] [Indexed: 05/11/2023]
Abstract
In plants, bZIP (basic leucine zipper) transcription factors regulate diverse processes such as development and stress responses. However, few of these transcription factors have been functionally characterized in maize (Zea mays). In this study, we characterized the bZIP transcription factor gene ZmbZIP4 from maize. ZmbZIP4 was differentially expressed in various organs of maize and was induced by high salinity, drought, heat, cold, and abscisic acid treatment in seedlings. A transactivation assay in yeast demonstrated that ZmbZIP4 functioned as a transcriptional activator. A genome-wide screen for ZmbZIP4 targets by immunoprecipitation sequencing revealed that ZmbZIP4 could positively regulate a number of stress response genes, such as ZmLEA2, ZmRD20, ZmRD21, ZmRab18, ZmNHX3, ZmGEA6, and ZmERD, and some abscisic acid synthesis-related genes, including NCED, ABA1, AAO3, and LOS5 In addition, ZmbZIP4 targets some root development-related genes, including ZmLRP1, ZmSCR, ZmIAA8, ZmIAA14, ZmARF2, and ZmARF3, and overexpression of ZmbZIP4 resulted in an increased number of lateral roots, longer primary roots, and an improved root system. Increased abscisic acid synthesis by overexpression of ZmbZIP4 also can increase the plant's ability to resist abiotic stress. Thus, ZmbZIP4 is a positive regulator of plant abiotic stress responses and is involved in root development in maize.
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Affiliation(s)
- Haizhen Ma
- School of Life Sciences, Shandong University, Jinan 250100, Shandong, China
| | - Can Liu
- School of Life Sciences, Shandong University, Jinan 250100, Shandong, China
| | - Zhaoxia Li
- School of Life Sciences, Shandong University, Jinan 250100, Shandong, China
| | - Qijun Ran
- School of Life Sciences, Shandong University, Jinan 250100, Shandong, China
| | - Guangning Xie
- School of Life Sciences, Shandong University, Jinan 250100, Shandong, China
| | - Baomei Wang
- School of Life Sciences, Shandong University, Jinan 250100, Shandong, China
| | - Shuang Fang
- National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 100101 Beijing, China
| | - Jinfang Chu
- National Centre for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 100101 Beijing, China
| | - Juren Zhang
- School of Life Sciences, Shandong University, Jinan 250100, Shandong, China
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Jalakas P, Merilo E, Kollist H, Brosché M. ABA-mediated regulation of stomatal density is OST1-independent. PLANT DIRECT 2018; 2:e00082. [PMID: 31245747 PMCID: PMC6508810 DOI: 10.1002/pld3.82] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 07/16/2018] [Accepted: 07/24/2018] [Indexed: 05/05/2023]
Abstract
Stomata, small pores on the surfaces of leaves formed by a pair of guard cells, adapt rapidly to changes in the environment by adjusting the aperture width. As a long-term response, the number of stomata is regulated during stomatal development. The hormone abscisic acid (ABA) regulates both processes. In ABA mediated guard cell signaling the protein kinase OPEN STOMATA1 (OST1) has a central role, as stomatal closure in the ost1 mutant is impaired in response to ABA and to different environmental stimuli. We aimed to dissect the contribution of different ABA-related regulatory mechanisms in determining stomatal conductance, a combination of stomatal density and aperture width, and crossed the ost1 mutant with mutants that either decreased (aba3) or increased (cyp707a1/a3) the concentration of ABA in plants. The double mutant ost1 aba3 had higher stomatal conductance than either parent due to a combination of increased stomatal aperture width and higher stomatal density. In the triple mutant ost1 cyp707a1/a3, stomatal conductance was significantly lower compared to ost1-3 due to lower stomatal density. Further characterization of the single, double and triple mutants showed that responses to treatments that lead to stomatal closure were impaired in ost1 as well as ost1 aba3 and ost1 cyp707a1/a3 mutants, supporting a critical role for OST1 in stomatal aperture regulation. On the basis of our results, we suggest that two signaling pathways regulate water flux from leaves, that is, stomatal conductance: an ABA-dependent pathway that determines stomatal density independent of OST1; and an OST1-dependent pathway that regulates rapid changes in stomatal aperture.
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Affiliation(s)
- Pirko Jalakas
- Institute of TechnologyUniversity of TartuTartuEstonia
| | - Ebe Merilo
- Institute of TechnologyUniversity of TartuTartuEstonia
| | | | - Mikael Brosché
- Institute of TechnologyUniversity of TartuTartuEstonia
- Viikki Plant Science Centre, Organismal and Evolutionary Biology Research ProgrammeFaculty of Biological and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
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49
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Pan Y, Liu Z, Rocheleau H, Fauteux F, Wang Y, McCartney C, Ouellet T. Transcriptome dynamics associated with resistance and susceptibility against fusarium head blight in four wheat genotypes. BMC Genomics 2018; 19:642. [PMID: 30157778 PMCID: PMC6116500 DOI: 10.1186/s12864-018-5012-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 08/14/2018] [Indexed: 02/07/2023] Open
Abstract
Background Fusarium head blight (FHB) of wheat in North America is caused mostly by the fungal pathogen Fusarium graminearum (Fg). Upon exposure to Fg, wheat initiates a series of cellular responses involving massive transcriptional reprogramming. In this study, we analyzed transcriptomics data of four wheat genotypes (Nyubai, Wuhan 1, HC374, and Shaw), at 2 and 4 days post inoculation (dpi) with Fg, using RNA-seq technology. Results A total of 37,772 differentially expressed genes (DEGs) were identified, 28,961 from wheat and 8811 from the pathogen. The susceptible genotype Shaw exhibited the highest number of host and pathogen DEGs, including 2270 DEGs associating with FHB susceptibility. Protein serine/threonine kinases and LRR-RK were associated with susceptibility at 2 dpi, while several ethylene-responsive, WRKY, Myb, bZIP and NAC-domain containing transcription factors were associated with susceptibility at 4 dpi. In the three resistant genotypes, 220 DEGs were associated with resistance. Glutathione S-transferase (GST), membrane proteins and distinct LRR-RKs were associated with FHB resistance across the three genotypes. Genes with unique, high up-regulation by Fg in Wuhan 1 were mostly transiently expressed at 2 dpi, while many defense-associated genes were up-regulated at both 2 and 4 dpi in Nyubai; the majority of unique genes up-regulated in HC374 were detected at 4 dpi only. In the pathogen, most genes showed increased expression between 2 and 4 dpi in all genotypes, with stronger levels in the susceptible host; however two pectate lyases and a hydrolase were expressed higher at 2 dpi, and acetyltransferase activity was highly enriched at 4 dpi. Conclusions There was an early up-regulation of LRR-RKs, different between susceptible and resistant genotypes; subsequently, distinct sets of genes associated with defense response were up-regulated. Differences in expression profiles among the resistant genotypes indicate genotype-specific defense mechanisms. This study also shows a greater resemblance in transcriptomics of HC374 to Nyubai, consistent with their sharing of two FHB resistance QTLs on 3BS and 5AS, compared to Wuhan 1 which carries one QTL on 2DL in common with HC374. Electronic supplementary material The online version of this article (10.1186/s12864-018-5012-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Youlian Pan
- Digital Technologies Research Centre, NRC, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada.
| | - Ziying Liu
- Digital Technologies Research Centre, NRC, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
| | - Hélène Rocheleau
- Ottawa Research and Development Centre, AAFC, 960 Carling Ave, Ottawa, ON, K1A 0C6, Canada
| | - François Fauteux
- Digital Technologies Research Centre, NRC, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
| | - Yunli Wang
- Digital Technologies Research Centre, NRC, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
| | - Curt McCartney
- Morden Research and Development Centre, AAFC, 101 Route 100, Morden, MB, R6M 1Y5, Canada
| | - Thérèse Ouellet
- Ottawa Research and Development Centre, AAFC, 960 Carling Ave, Ottawa, ON, K1A 0C6, Canada.
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The Characterization of Arabidopsis mterf6 Mutants Reveals a New Role for mTERF6 in Tolerance to Abiotic Stress. Int J Mol Sci 2018; 19:ijms19082388. [PMID: 30110886 PMCID: PMC6121570 DOI: 10.3390/ijms19082388] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 08/06/2018] [Accepted: 08/11/2018] [Indexed: 12/29/2022] Open
Abstract
Exposure of plants to abiotic stresses, such as salinity, cold, heat, or drought, affects their growth and development, and can significantly reduce their productivity. Plants have developed adaptive strategies to deal with situations of abiotic stresses with guarantees of success, which have favoured the expansion and functional diversification of different gene families. The family of mitochondrial transcription termination factors (mTERFs), first identified in animals and more recently in plants, is likely a good example of this. In plants, mTERFs are located in chloroplasts and/or mitochondria, participate in the control of organellar gene expression (OGE), and, compared with animals, the mTERF family is expanded. Furthermore, the mutations in some of the hitherto characterised plant mTERFs result in altered responses to salt, high light, heat, or osmotic stress, which suggests a role for these genes in plant adaptation and tolerance to adverse environmental conditions. In this work, we investigated the effect of impaired mTERF6 function on the tolerance of Arabidopsis to salt, osmotic and moderate heat stresses, and on the response to the abscisic acid (ABA) hormone, required for plants to adapt to abiotic stresses. We found that the strong loss-of-function mterf6-2 and mterf6-5 mutants, mainly the former, were hypersensitive to NaCl, mannitol, and ABA during germination and seedling establishment. Additionally, mterf6-5 exhibited a higher sensitivity to moderate heat stress and a lower response to NaCl and ABA later in development. Our computational analysis revealed considerable changes in the mTERF6 transcript levels in plants exposed to different abiotic stresses. Together, our results pinpoint a function for Arabidopsis mTERF6 in the tolerance to adverse environmental conditions, and highlight the importance of plant mTERFs, and hence of OGE homeostasis, for proper acclimation to abiotic stress.
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