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Gong F, Zhang T, Lu Y, Govindan V, Liu R, Liu J, Wang X, Liu D, Zheng Y, Huang L, Wu B. Overexpression of TdNACB improves the drought resistance of rice. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 216:109157. [PMID: 39369649 DOI: 10.1016/j.plaphy.2024.109157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2024] [Revised: 09/23/2024] [Accepted: 09/25/2024] [Indexed: 10/08/2024]
Abstract
Drought stress greatly affects disrupts the productivity, ecological structure, physiological and biochemical activities of wheat at different growth stages. However, drought stress tolerance is a complex quantitative trait and involves multiple metabolic pathways. We found that a wild emmer introgression line BAd7-209 had stronger drought resistance compared with drought resistant wheat Zhongmai 175. The transcriptome analysis found 14,284, 22,383 and 21,451 genes had expression corresponding responsed to drought stress at 24h, 48h, 120h, respectively and significantly enriched in 'Arginine and proline metabolism' and 'Peroxisome' in BAd7-209. 1666 transcription factors (TFs) related responsed to drought stress in which TdNACB showed high expression at 24h, 48h and 120h and had the closest relationship with TaNAC48 and OsNAC6 in phylogenetic analysis. Overexpression of TdNACB significantly enhanced drought resistance in rice and overexpression lines had significantly higher CAT, POD and SOD activity, Pro content and lower MDA content than those of the WT under drought stress. The result demonstrated that TdNACB positively regulates drought resistance through increasing proline content and enhancing activity of enzyme related to ROS scavenging. The results of this study provides candidate genes for improving wheat drought resistance and guide as reference for studying the molecular mechanisms of wheat drought resistance.
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Affiliation(s)
- Fangyi Gong
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China; Vegetable Germplasm Innovation and Variety Improvement Key Laboratory of Sichuan Province, Horticulture Institute, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, China
| | - Tian Zhang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yusen Lu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Velu Govindan
- International Maize and Wheat Improvement Center (CIMMYT), Apdo Postal 6-641, Mexico DF, 06600, Mexico
| | - Ruiqin Liu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jia Liu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiangquan Wang
- Neijiang Academy of Agricultural Sciences, Neijiang, 641000, China
| | - Dengcai Liu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Youliang Zheng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lin Huang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
| | - Bihua Wu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China.
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Yu S, Lian Z, Yu L, Guo W, Zhang C, Zhang Y. Gamma-aminobutyric acid elicits H 2O 2 signalling and promotes wheat seed germination under combined salt and heat stress. PeerJ 2024; 12:e17907. [PMID: 39308802 PMCID: PMC11416083 DOI: 10.7717/peerj.17907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 07/22/2024] [Indexed: 09/25/2024] Open
Abstract
Background In the realm of wheat seed germination, abiotic stresses such as salinity and high temperature have been shown to hinder the process. These stresses can lead to the production of reactive oxygen species, which, within a certain concentration range, may actually facilitate seed germination. γ-aminobutyric acid (GABA), a non-protein amino acid, serves as a crucial signaling molecule in the promotion of seed germination. Nevertheless, the potential of GABA to regulate seed germination under the simultaneous stress of heat and salinity remains unexplored in current literature. Methods This study employed observational methods to assess seed germination rate (GR), physiological methods to measure H2O2 content, and the activities of glutamate decarboxylase (GAD), NADPH oxidase (NOX), superoxide dismutase (SOD), and catalase (CAT). The levels of ABA and GABA were quantified using high-performance liquid chromatography technology. Furthermore, quantitative real-time PCR technology was utilized to analyze the expression levels of two genes encoding antioxidant enzymes, MnSOD and CAT. Results The findings indicated that combined stress (30 °C + 50 mM NaCl) decreased the GR of wheat seeds to about 21%, while treatment with 2 mM GABA increased the GR to about 48%. However, the stimulatory effect of GABA was mitigated by the presence of ABA, dimethylthiourea, and NOX inhibitor, but was strengthened by H2O2, antioxidant enzyme inhibitor, fluridone, and gibberellin. In comparison to the control group (20 °C + 0 mM NaCl), this combined stress led to elevated levels of ABA, reduced GAD and NOX activity, and a decrease in H2O2 and GABA content. Further investigation revealed that this combined stress significantly suppressed the activity of superoxide dismutase (SOD) and catalase (CAT), as well as downregulated the gene expression levels of MnSOD and CAT. However, the study demonstrates that exogenous GABA effectively reversed the inhibitory effects of combined stress on wheat seed germination. These findings suggest that GABA-induced NOX-mediated H2O2 signalling plays a crucial role in mitigating the adverse impact of combined stress on wheat seed germination. This research holds significant theoretical and practical implications for the regulation of crop seed germination by GABA under conditions of combined stress.
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Affiliation(s)
- Song Yu
- Department of Agronomy and Crop Sciences, College of Agriculture, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang Province, China
| | - Zhihan Lian
- Department of Agronomy and Crop Sciences, College of Agriculture, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang Province, China
| | - Lihe Yu
- Department of Agronomy and Crop Sciences, College of Agriculture, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang Province, China
- Key Laboratory of Low-carbon Green Agriculture in Northeastern China, Ministry of Agriculture and Rural Affairs, Daqing, Heilongjiang Province, China
| | - Wei Guo
- Department of Agronomy and Crop Sciences, College of Agriculture, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang Province, China
- Key Laboratory of Low-carbon Green Agriculture in Northeastern China, Ministry of Agriculture and Rural Affairs, Daqing, Heilongjiang Province, China
| | - Chunyu Zhang
- Department of Agronomy and Crop Sciences, College of Agriculture, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang Province, China
- Key Laboratory of Low-carbon Green Agriculture in Northeastern China, Ministry of Agriculture and Rural Affairs, Daqing, Heilongjiang Province, China
| | - Yifei Zhang
- Department of Agronomy and Crop Sciences, College of Agriculture, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang Province, China
- Key Laboratory of Low-carbon Green Agriculture in Northeastern China, Ministry of Agriculture and Rural Affairs, Daqing, Heilongjiang Province, China
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Perez-Piñar T, Hartmann A, Bössow S, Gnad H, Mock HP. Metabolic changes during wheat microspore embryogenesis induction using the highly responsive cultivar Svilena. JOURNAL OF PLANT PHYSIOLOGY 2024; 294:154193. [PMID: 38422632 DOI: 10.1016/j.jplph.2024.154193] [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: 10/03/2023] [Revised: 02/08/2024] [Accepted: 02/08/2024] [Indexed: 03/02/2024]
Abstract
Androgenetically-derived haploids can be obtained by inducing embryogenesis in microspores. Thus, full homozygosity is achieved in a single generation, oppositely to conventional plant breeding programs. Here, the metabolite profile of embryogenic microspores of Triticum aestivum was acquired and integrated with transcriptomic existing data from the same samples in an effort to identify the key metabolic processes occurring during the early stages of microspore embryogenesis. Primary metabolites and transcription profiles were identified at three time points: prior to and immediately following a low temperature pre-treatment given to uninuclear microspores, and after the first nuclear division. This is the first time an integrative -omics analysis is reported in microspore embryogenesis in T. aestivum. The key findings were that the energy produced during the pre-treatment was obtained from the tricarboxylic acid (TCA) cycle and from starch degradation, while starch storage resumed after the first nuclear division. Intermediates of the TCA cycle were highly demanded from a very active amino acid metabolism. The transcription profiles of genes encoding enzymes involved in amino acid synthesis differed from the metabolite profiles. The abundance of glutamine synthetase was correlated with that of glutamine. Cytosolic glutamine synthetase isoform 1 was found predominantly after the nuclear division. Overall, energy production was shown to represent a major component of the de-differentiation process induced by the pre-treatment, supporting a highly active amino acid metabolism.
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Affiliation(s)
- Teresa Perez-Piñar
- Department of Physiology and Cell Biology, Applied Biochemistry, Leibniz Institute of Plant Genetics and Crop Plant Research, 06466 Seeland/OT Gatersleben, Germany.
| | - Anja Hartmann
- Department of Physiology and Cell Biology, Molecular Plant Nutrition, Leibniz Institute of Plant Genetics and Crop Plant Research, 06466 Seeland/OT Gatersleben, Germany.
| | - Sandra Bössow
- Saaten-Union Biotec GmbH, Am Schwabepan 6, 06466 Seeland/OT Gatersleben, Germany.
| | - Heike Gnad
- Saaten-Union Biotec GmbH, Am Schwabepan 6, 06466 Seeland/OT Gatersleben, Germany.
| | - Hans-Peter Mock
- Department of Physiology and Cell Biology, Applied Biochemistry, Leibniz Institute of Plant Genetics and Crop Plant Research, 06466 Seeland/OT Gatersleben, Germany.
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Zepeda B, Marcelis LFM, Kaiser E, Verdonk JC. Petunia as a model for MYB transcription factor action under salt stress. FRONTIERS IN PLANT SCIENCE 2023; 14:1286547. [PMID: 38155855 PMCID: PMC10753185 DOI: 10.3389/fpls.2023.1286547] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/20/2023] [Indexed: 12/30/2023]
Abstract
Salinity is a current and growing problem, affecting crops worldwide by reducing yields and product quality. Plants have different mechanisms to adapt to salinity; some crops are highly studied, and their salinity tolerance mechanisms are widely known. However, there are other crops with commercial importance that still need characterization of their molecular mechanisms. Usually, transcription factors are in charge of the regulation of complex processes such as the response to salinity. MYB-TFs are a family of transcription factors that regulate various processes in plant development, and both central and specialized metabolism. MYB-TFs have been studied extensively as mediators of specialized metabolism, and some are master regulators. The influence of MYB-TFs on highly orchestrated mechanisms, such as salinity tolerance, is an attractive research target. The versatility of petunia as a model species has allowed for advances to be made in multiple fields: metabolomic pathways, quality traits, stress resistance, and signal transduction. It has the potential to be the link between horticultural crops and lab models, making it useful in translating discoveries related to the MYB-TF pathways into other crops. We present a phylogenetic tree made with Petunia axillaris and Petunia inflata R2R3-MYB subfamily sequences, which could be used to find functional conservation between different species. This work could set the foundations to improve salinity resistance in other commercial crops in later studies.
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Affiliation(s)
| | | | | | - Julian C. Verdonk
- Horticulture and Product Physiology, Department of Plant Sciences, Wageningen University & Research, Wageningen, Netherlands
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Da Ros L, Bollina V, Soolanayakanahally R, Pahari S, Elferjani R, Kulkarni M, Vaid N, Risseuw E, Cram D, Pasha A, Esteban E, Konkin D, Provart N, Nambara E, Kagale S. Multi-omics atlas of combinatorial abiotic stress responses in wheat. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 116:1118-1135. [PMID: 37248640 DOI: 10.1111/tpj.16332] [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: 05/01/2022] [Revised: 05/10/2023] [Accepted: 05/26/2023] [Indexed: 05/31/2023]
Abstract
Field-grown crops rarely experience growth conditions in which yield can be maximized. Environmental stresses occur in combination, with advancements in crop tolerance further complicated by its polygenic nature. Strategic targeting of causal genes is required to meet future crop production needs. Here, we employed a systems biology approach in wheat (Triticum aestivum L.) to investigate physio-metabolic adjustments and transcriptome reprogramming involved in acclimations to heat, drought, salinity and all combinations therein. A significant shift in magnitude and complexity of plant response was evident across stress scenarios based on the agronomic losses, increased proline concentrations and 8.7-fold increase in unique differentially expressed transcripts (DETs) observed under the triple stress condition. Transcriptome data from all stress treatments were assembled into an online, open access eFP browser for visualizing gene expression during abiotic stress. Weighted gene co-expression network analysis revealed 152 hub genes of which 32% contained the ethylene-responsive element binding factor-associated amphiphilic repression (EAR) transcriptional repression motif. Cross-referencing against the 31 DETs common to all stress treatments isolated TaWRKY33 as a leading candidate for greater plant tolerance to combinatorial stresses. Integration of our findings with available literature on gene functional characterization allowed us to further suggest flexible gene combinations for future adaptive gene stacking in wheat. Our approach demonstrates the strength of robust multi-omics-based data resources for gene discovery in complex environmental conditions. Accessibility of such datasets will promote cross-validation of candidate genes across studies and aid in accelerating causal gene validation for crop resiliency.
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Affiliation(s)
- Letitia Da Ros
- Aquatic and Crop Resource Development, National Research Council Canada, Saskatoon, Saskatchewan, Canada
- Summerland Research and Development Centre, Agriculture and Agri-Food Canada, Summerland, British Columbia, Canada
| | - Venkatesh Bollina
- Aquatic and Crop Resource Development, National Research Council Canada, Saskatoon, Saskatchewan, Canada
| | - Raju Soolanayakanahally
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, Saskatchewan, Canada
| | - Shankar Pahari
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, Saskatchewan, Canada
| | - Raed Elferjani
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, Saskatchewan, Canada
| | - Manoj Kulkarni
- Aquatic and Crop Resource Development, National Research Council Canada, Saskatoon, Saskatchewan, Canada
| | - Neha Vaid
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Eddy Risseuw
- Aquatic and Crop Resource Development, National Research Council Canada, Saskatoon, Saskatchewan, Canada
| | - Dustin Cram
- Aquatic and Crop Resource Development, National Research Council Canada, Saskatoon, Saskatchewan, Canada
| | - Asher Pasha
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - Eddi Esteban
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - David Konkin
- Aquatic and Crop Resource Development, National Research Council Canada, Saskatoon, Saskatchewan, Canada
| | - Nicholas Provart
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - Eiji Nambara
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - Sateesh Kagale
- Aquatic and Crop Resource Development, National Research Council Canada, Saskatoon, Saskatchewan, Canada
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Han H, Qu Y, Wang Y, Zhang Z, Geng Y, Li Y, Shao Q, Zhang H, Ma C. Transcriptome and Small RNA Sequencing Reveals the Basis of Response to Salinity, Alkalinity and Hypertonia in Quinoa ( Chenopodium quinoa Willd.). Int J Mol Sci 2023; 24:11789. [PMID: 37511549 PMCID: PMC10380837 DOI: 10.3390/ijms241411789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
Quinoa (Chenopodium quinoa Willd.) is a dicotyledonous cereal that is rich in nutrients. This important crop has been shown to have significant tolerance to abiotic stresses such as salinization and drought. Understanding the underlying mechanism of stress response in quinoa would be a significant advantage for breeding crops with stress tolerance. Here, we treated the low-altitude quinoa cultivar CM499 with either NaCl (200 mM), Na2CO3/NaHCO3 (100 mM, pH 9.0) or PEG6000 (10%) to induce salinity, alkalinity and hypertonia, respectively, and analyzed the subsequent expression of genes and small RNAs via high-throughput sequencing. A list of known/novel genes were identified in quinoa, and the ones responding to different stresses were selected. The known/novel quinoa miRNAs were also identified, and the target genes of the stress response ones were predicted. Both the differently expressed genes and the targets of differently expressed miRNAs were found to be enriched for reactive oxygen species homeostasis, hormone signaling, cell wall synthesis, transcription factors and some other factors. Furthermore, we detected changes in reactive oxygen species accumulation, hormone (auxin and ethylene) responses and hemicellulose synthesis in quinoa seedlings treated with stresses, indicating their important roles in the response to saline, alkaline or hyperosmotic stresses in quinoa. Thus, our work provides useful information for understanding the mechanism of abiotic stress responses in quinoa, which would provide clues for improving breeding for quinoa and other crops.
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Affiliation(s)
- Huanan Han
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Yusen Qu
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Yingcan Wang
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Zaijie Zhang
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Yuhu Geng
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Yuanyuan Li
- CAS Center for Excellence in Molecular Plant Sciences, Fenglin Road 300, Shanghai 200032, China
| | - Qun Shao
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Hui Zhang
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
| | - Changle Ma
- College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China
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Shen J, Liu J, Yuan Y, Chen L, Ma J, Li X, Li J. The mechanism of abscisic acid regulation of wild Fragaria species in response to cold stress. BMC Genomics 2022; 23:670. [PMID: 36162976 PMCID: PMC9513977 DOI: 10.1186/s12864-022-08889-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 09/12/2022] [Indexed: 11/16/2022] Open
Abstract
Background Abiotic stresses have increasingly serious effects on the growth and yield of crops. Cold stress, in particular, is an increasing problem. In this study, Fragaria daltoniana and F. vesca were determined to be cold-resistant and cold-sensitive species, respectively. Integrated transcriptomics and metabolomics methods were used to analyze the regulatory mechanism of abscisic acid (ABA) in F. daltoniana and F. vesca in their response to low temperature stress. Results F. daltoniana and F. vesca increased their ABA content under low temperature stress by upregulating the expression of the ABA biosynthetic pathway gene NCED and downregulating the expression of the ABA degradative gene CYP707A. Both types of regulation increased the accumulation of glucose and fructose, resulting in a reduction of damage under low temperature stress. Twelve transcription factors were found to be involved in the ABA regulatory pathway. The strong cold tolerance of F. daltoniana could be owing to its higher levels of ABA that accumulated compared with those in F. vesca under low temperature stress. In addition, the gene ABF2, which is related to the transduction of glucose signaling, was significantly upregulated in the leaves of F. daltoniana, while it was downregulated in the leaves of F. vesca under low temperature stress. This could contribute to the higher levels of glucose signal transduction in F. daltoniana. Thus, this could explain the higher peroxidase activity and lower damage to cell membranes in the leaves of F. daltoniana compared with F. vesca under low temperature stress, which endows the former with stronger cold tolerance. Conclusions Under low temperature stress, the differences in the accumulation of ABA and the expression trends of ABF2 and ABF4 in different species of wild strawberries may be the primary reason for their differences in cold tolerance. Our results provide an important empirical reference and technical support for breeding resistant cultivated strawberry plants. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-022-08889-8.
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Affiliation(s)
- Jincheng Shen
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China.,College of Life Science and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, China.,Department of Plant and Environmental Sciences, University of Copenhagen, 1871, Frederiksberg C, Denmark
| | - Jie Liu
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China
| | - Yongge Yuan
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China
| | - Luxi Chen
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China
| | - Junxia Ma
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China
| | - Xin Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China
| | - Junmin Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China.
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Wang S, He J, Deng M, Wang C, Wang R, Yan J, Luo M, Ma F, Guan Q, Xu J. Integrating ATAC-seq and RNA-seq Reveals the Dynamics of Chromatin Accessibility and Gene Expression in Apple Response to Drought. Int J Mol Sci 2022; 23:11191. [PMID: 36232500 PMCID: PMC9570298 DOI: 10.3390/ijms231911191] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/19/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
Drought resistance in plants is influenced by multiple signaling pathways that involve various transcription factors, many target genes, and multiple types of epigenetic modifications. Studies on epigenetic modifications of drought focus on DNA methylation and histone modifications, with fewer on chromatin remodeling. Changes in chromatin accessibility can play an important role in abiotic stress in plants by affecting RNA polymerase binding and various regulatory factors. However, the changes in chromatin accessibility during drought in apples are not well understood. In this study, the landscape of chromatin accessibility associated with the gene expression of apple (GL3) under drought conditions was analyzed by Assay for Transposase Accessible Chromatin with high-throughput sequencing (ATAC-seq) and RNA-seq. Differential analysis between drought treatment and control identified 23,466 peaks of upregulated chromatin accessibility and 2447 peaks of downregulated accessibility. The drought-induced chromatin accessibility changed genes were mainly enriched in metabolism, stimulus, and binding pathways. By combining results from differential analysis of RNA-seq and ATAC-seq, we identified 240 genes with higher chromatin accessibility and increased gene expression under drought conditions that may play important functions in the drought response process. Among them, a total of nine transcription factor genes were identified, including ATHB7, HAT5, and WRKY26. These transcription factor genes are differentially expressed with different chromatin accessibility motif binding loci that may participate in apple response to drought by regulating downstream genes. Our study provides a reference for chromatin accessibility under drought stress in apples and the results will facilitate subsequent studies on chromatin remodelers and transcription factors.
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Affiliation(s)
- Shicong Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Jieqiang He
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Mengting Deng
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Caixia Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Ruifeng Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Jinjiao Yan
- College of Forestry, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Minrong Luo
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Qingmei Guan
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
| | - Jidi Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest Agricultural and Forestry University, Yangling, Xianyang 712100, China
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Bapela T, Shimelis H, Tsilo TJ, Mathew I. Genetic Improvement of Wheat for Drought Tolerance: Progress, Challenges and Opportunities. PLANTS (BASEL, SWITZERLAND) 2022; 11:1331. [PMID: 35631756 PMCID: PMC9144332 DOI: 10.3390/plants11101331] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/27/2022] [Accepted: 05/04/2022] [Indexed: 06/01/2023]
Abstract
Wheat production and productivity are challenged by recurrent droughts associated with climate change globally. Drought and heat stress resilient cultivars can alleviate yield loss in marginal production agro-ecologies. The ability of some crop genotypes to thrive and yield in drought conditions is attributable to the inherent genetic variation and environmental adaptation, presenting opportunities to develop drought-tolerant varieties. Understanding the underlying genetic, physiological, biochemical, and environmental mechanisms and their interactions is key critical opportunity for drought tolerance improvement. Therefore, the objective of this review is to document the progress, challenges, and opportunities in breeding for drought tolerance in wheat. The paper outlines the following key aspects: (1) challenges associated with breeding for adaptation to drought-prone environments, (2) opportunities such as genetic variation in wheat for drought tolerance, selection methods, the interplay between above-ground phenotypic traits and root attributes in drought adaptation and drought-responsive attributes and (3) approaches, technologies and innovations in drought tolerance breeding. In the end, the paper summarises genetic gains and perspectives in drought tolerance breeding in wheat. The review will serve as baseline information for wheat breeders and agronomists to guide the development and deployment of drought-adapted and high-performing new-generation wheat varieties.
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Affiliation(s)
- Theresa Bapela
- African Centre for Crop Improvement, University of Kwa-Zulu Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa; (H.S.); (I.M.)
- Agricultural Research Council—Small Grain, Bethlehem 9700, South Africa;
| | - Hussein Shimelis
- African Centre for Crop Improvement, University of Kwa-Zulu Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa; (H.S.); (I.M.)
| | - Toi John Tsilo
- Agricultural Research Council—Small Grain, Bethlehem 9700, South Africa;
| | - Isack Mathew
- African Centre for Crop Improvement, University of Kwa-Zulu Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa; (H.S.); (I.M.)
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PtrMYB3, a R2R3-MYB Transcription Factor from Poncirus trifoliata, Negatively Regulates Salt Tolerance and Hydrogen Peroxide Scavenging. Antioxidants (Basel) 2021; 10:antiox10091388. [PMID: 34573020 PMCID: PMC8466168 DOI: 10.3390/antiox10091388] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/17/2022] Open
Abstract
MYB transcription factors are widely present in plants and play significant roles in abiotic stresses. However, most MYB genes have not been identified in plants and their functions in abiotic stresses are still unknown. In this study, one MYB gene, designated as PtrMYB3, was cloned from trifoliate orange (Poncirus trifoliata (L.) Raf.), and its function in salt tolerance was investigated. PtrMYB3 contains a conserved R2R3-MYB domain, which is the typical property of R2R3-MYB subfamily proteins. Expression profiling under abiotic stresses indicated that PtrMYB3 could be induced by salt, dehydration and cold stresses. PtrMYB3 was found to be localized to the nucleus and possessed transactivation activity. Overexpression of PtrMYB3 by genetic transformation in tobacco impaired its salt tolerance, whereas silencing of PtrMYB3 by VIGS (virus-induced gene silencing) in trifoliate orange conferred significantly enhanced salt tolerance, indicating that PtrMYB3 negatively regulates salt tolerance. Furthermore, a peroxidase gene (PtrPOD) was found to be greatly upregulated in PtrMYB3-silenced trifoliate orange, and a dual LUC (luciferase) assay confirmed that PtrMYB3 could suppress the expression of PtrPOD. The hydrogen peroxide (H2O2) accumulation in PtrMYB3 transgenic tobacco plants after salt stress was higher than the wild type (WT), further confirming that overexpression of PtrMYB3 inhibited PtrPOD-mediated H2O2 scavenging. Taken together, these results demonstrate that PtrMYB3 negatively regulates salt tolerance, at least in part, due to the excess accumulation of H2O2.
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11
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Wang Y, Zhang Y, Fan C, Wei Y, Meng J, Li Z, Zhong C. Genome-wide analysis of MYB transcription factors and their responses to salt stress in Casuarina equisetifolia. BMC PLANT BIOLOGY 2021; 21:328. [PMID: 34238224 PMCID: PMC8265015 DOI: 10.1186/s12870-021-03083-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/01/2021] [Indexed: 05/25/2023]
Abstract
BACKGROUND MYB transcription factors are a kind of DNA binding protein that can specifically interact with the promoter region. Members of MYB TFs are widely involved in plant growth and development, secondary metabolism, stress response, and hormone signal transduction. However, there is no report of comprehensive bioinformatics analysis on the MYB family of Casuarina equisetifolia. RESULTS In this study, bioinformatics methods were used to screen out 182 MYB transcription factors from the Casuarina equisetifolia genome database, including 69 1R-MYB, 107 R2R3-MYB, 4 R1R2R3-MYB, and 2 4R-MYB. The C. equisetifolia R2R3-MYB genes were divided into 29 groups based on the phylogenetic topology and the classification of the MYB superfamily in Arabidopsis thaliana, while the remaining MYB genes (1R-MYB, R1R2R3-MYB, and 4R-MYB) was divided into 19 groups. Moreover, the conserved motif and gene structure analysis shown that the members of the CeqMYBs were divided into the same subgroups with mostly similar gene structures. In addition, many conserved amino acids in the R2 and R3 domains of CeqMYBs by WebLogo analysis, especially tryptophan residues (W), with 3 conserved W in R2 repeat and 2 conserved W in R3 repeat. Combining promoter and GO annotation analysis, speculated on the various biological functions of CeqMYBs, thus 32 MYB genes were selected to further explore its response to salt stress by using qPCR analysis technique. Most CeqMYB genes were differentially regulated following multiple salt treatments. CONCLUSIONS Seven genes (CeqMYB164, CeqMYB4, CeqMYB53, CeqMYB32, CeqMYB114, CeqMYB71 and CeqMYB177) were assigned to the "response to salt stress" by GO annotation. Among them, the expression level of CeqMYB4 was up-regulated under various salt treatments, indicating CeqMYB4 might participated in the response to salt stress. Our results provide important information for the biological function of C. equisetifolia, as well as offer candidate genes for further study of salt stress mechanism.
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Affiliation(s)
- Yujiao Wang
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Yong Zhang
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China.
| | - Chunjie Fan
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Yongcheng Wei
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Jingxiang Meng
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Zhen Li
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Chonglu Zhong
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
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12
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Yang Y, Zheng C, Zhong C, Lu T, Gul J, Jin X, Zhang Y, Liu Q. Transcriptome analysis of Sonneratia caseolaris seedlings under chilling stress. PeerJ 2021; 9:e11506. [PMID: 34141477 PMCID: PMC8180195 DOI: 10.7717/peerj.11506] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/03/2021] [Indexed: 12/28/2022] Open
Abstract
Sonneratia caseolaris is a native mangrove species found in China. It is fast growing and highly adaptable for mangrove afforestation, but suffered great damage by chilling event once introduced to high latitude area. To understand the response mechanisms under chilling stress, physiological and transcriptomic analyses were conducted. The relative electrolyte conductivity, malondialdehyde (MDA) content, soluble sugar content and soluble protein content increased significantly under chilling stress. This indicated that S. caseolaris suffered great damage and increased the levels of osmoprotectants in response to the chilling stress. Gene expression comparison analysis of S. caseolaris leaves after 6 h of chilling stress was performed at the transcriptional scale using RNA-Seq. A total of 168,473 unigenes and 3,706 differentially expressed genes (DEGs) were identified. GO and KEGG enrichment analyses showed that the DEGs were mainly involved in carbohydrate metabolism, antioxidant enzyme, plant hormone signal transduction, and transcription factors (TFs). Sixteen genes associated with carbohydrate metabolism, antioxidant enzyme, phytohormones and TFs were selected for qRT-PCR verification, and they indicated that the transcriptome data were reliable. Our work provided a comprehensive review of the chilling response of S. caseolaris at both physiological and transcriptomic levels, which will prove useful for further studies on stress-responses in mangrove plants.
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Affiliation(s)
- Yong Yang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China
| | - Chunfang Zheng
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, China
| | - Cairong Zhong
- Hainan Academy of Forestry, Hainan Mangrove Research Institute, Haikou, Hainan, China
| | - Tianxi Lu
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China
| | - Juma Gul
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China
| | - Xiang Jin
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China
| | - Ying Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China
| | - Qiang Liu
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China
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13
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Almutairi MM, Alrajhi AA. Prediction of gene expression under drought stress in spring wheat using codon usage pattern. Saudi J Biol Sci 2021; 28:4000-4004. [PMID: 34220257 PMCID: PMC8241893 DOI: 10.1016/j.sjbs.2021.04.015] [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: 11/11/2020] [Revised: 04/06/2021] [Accepted: 04/06/2021] [Indexed: 11/17/2022] Open
Abstract
Spring wheat (Triticum aestivum) is a staple food providing sources of essential proteins for human. In fact, gene expressions of wheat play an important role in growth and productivity that are affected by drought stress. The objective of this work focused on analysis gene feature on spring wheat represented by nucleotide and gene expressions under drought stress. It was found that the higher codon adaptation index was in both wheat root and L-galactono-1, 4-lactone dehydrogenase. It was also found that guanine and cytosine content were high (55.56%) in wheat root. Whereas, guanine and cytosine content were low (41.28%) in L-galactono-1, 4-lactone dehydrogenase. Moreover, the higher relative synonymous codon usage value was observed in codon CAA (1.20), GAA (1.33), GAT (1.00), and ATG (1.00) in wheat root and thus about 62.95% of the total variation in relative synonymous codon was explained by principal component analysis. Additionally, high averages frequency number of codon were (above 15.76) in Met, Lys, Ala, Gly, Phe, Asp, Glu, His, and Tyr; whereas, low averages were in remaining amino acids and majority (90%) of modified relative codon bias values was between 0.40 and 0.90. Shortly, calculations and analysis of codon usage pattern under drought stress would help for genetic engineering, molecular evolution, and gene prediction in wheat studies for developing varieties that associate with drought tolerance.
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Affiliation(s)
- Meshal M Almutairi
- National Center of Agricultural Technology, King Abdulaziz City for Science and Technology KACST, Box 6086, Riyadh 11442, Saudi Arabia
| | - Abdullah A Alrajhi
- National Center of Agricultural Technology, King Abdulaziz City for Science and Technology KACST, Box 6086, Riyadh 11442, Saudi Arabia
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14
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Li X, Zhang X, Liu G, Tang Y, Zhou C, Zhang L, Lv J. The spike plays important roles in the drought tolerance as compared to the flag leaf through the phenylpropanoid pathway in wheat. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 152:100-111. [PMID: 32408177 DOI: 10.1016/j.plaphy.2020.05.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/22/2020] [Accepted: 05/01/2020] [Indexed: 05/27/2023]
Abstract
The spike photosynthesis plays a curial role in wheat photosynthesis under drought stress. However, the mechanism of drought tolerance in the spike is still unclear. Our study compared the gas exchange parameters, antioxidant system, and phenylpropanoid pathway between the wheat flag leaf and spike in response to drought stress. Compared with the flag leaf, the spike organs exhibited lower reductions in the net photosynthetic rate (Pn), relative water content (RWC), and chlorophyll content (Chl) under drought stress. The activities of phenylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), and 4-coumarate-coenzyme A ligase (4CL) enzymes, and the total contents of phenolics and flavonoids (TPC and TFC, respectively) were enhanced much more percentages in the spike organs than that in the flag leaf under drought stress. Drought also induced the expression of structural genes (TaPAL, TaC4H, Ta4CL, TaCHS, TaCHI, TaFNS, TaF3H, TaFLS, TaDFR, and TaANS) involved in the phenylpropanoid pathway of the spike organs during the middle and late grain filling periods. The spike organs also showed much smaller accumulations of O2.-, hydrogen peroxide (H2O2), and malondialdehyde (MDA) in treated wheat. Higher activities of antioxidant enzymes (superoxide dismutase, SOD; peroxidase, POD; and catalase, CAT) and more proline content were observed in the spike organs as compared to the flag leaf under drought stress. All these results indicated that the enhanced tolerance to drought stress in spike organs was related to the elevated phenylpropanoid pathway. It could make the spike maintain a better water status and further lead to the relatively higher photosynthesis and lower membrane damage.
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Affiliation(s)
- Xiaorui Li
- College of Life Sciences, Northwest A & F University, 712100, Yangling, China
| | - Xu Zhang
- College of Life Sciences, Northwest A & F University, 712100, Yangling, China
| | - Guangping Liu
- College of Chemistry & Pharmacy, Northwest A & F University, 712100, Yangling, China
| | - Yan Tang
- College of Life Sciences, Northwest A & F University, 712100, Yangling, China
| | - Chunju Zhou
- College of Life Sciences, Northwest A & F University, 712100, Yangling, China
| | - Lixin Zhang
- College of Life Sciences, Northwest A & F University, 712100, Yangling, China
| | - Jinyin Lv
- College of Life Sciences, Northwest A & F University, 712100, Yangling, China.
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15
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An R1R2R3 MYB Transcription Factor, MnMYB3R1, Regulates the Polyphenol Oxidase Gene in Mulberry ( Morus notabilis). Int J Mol Sci 2019; 20:ijms20102602. [PMID: 31137877 PMCID: PMC6567046 DOI: 10.3390/ijms20102602] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 12/23/2022] Open
Abstract
The aim of this study was to determine how the mulberry (Morus notabilis) polyphenol oxidase 1 gene (MnPPO1) is regulated during plant stress responses by exploring the interaction between its promoter region and regulatory transcription factors. First, we analyzed the cis-acting elements in the MnPPO1 promoter. Then, we used the MnPPO1 promoter region [(1268 bp, including an MYB3R-binding cis-element (MSA)] as a probe to capture proteins in DNA pull-down assays. These analyses revealed that the MYB3R1 transcription factor in M. notabilis (encoded by MnMYB3R1) binds to the MnPPO1 promoter region. We further explored the interaction between the MnPPO1 promoter and MYB3R1 with the dual luciferase reporter, yeast one-hybrid, and chromatin immunoprecipitation assays. These analyses verified that MnMYB3R1 binds to the MSA in the MnPPO1 promoter region. The overexpression of MnMYB3R1 in tobacco upregulated the expression of the tobacco PPO gene. This observation as well as the quantitative real-time PCR results implied that MnMYB3R1 and PPO are involved in the abscisic acid-responsive stress response pathway.
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16
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Wu J, Jiang Y, Liang Y, Chen L, Chen W, Cheng B. Expression of the maize MYB transcription factor ZmMYB3R enhances drought and salt stress tolerance in transgenic plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 137:179-188. [PMID: 30798172 DOI: 10.1016/j.plaphy.2019.02.010] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 05/25/2023]
Abstract
MYB proteins are major transcription factors that play significant roles in plant defenses against various stresses. However, available information regarding stress-related MYB genes in maize is minimal. Herein, a maize MYB gene, ZmMYB3R, was cloned and functionally characterized. Subcellular localisation analysis showed that ZmMYB3R is localised to the nucleus. Yeast one-hybrid results revealed that ZmMYB3R has trans-activation activity, and a minimal activation domain at the C-terminus spanning residues 217-563. Gene expression analysis suggested that ZmMYB3R was induced by drought, salt and abscisic acid (ABA). Transgenic Arabidopsis plants overexpressing ZmMYB3R displayed enhanced growth performance and higher survival rates, elevated catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) enzyme activities, increased sensitivity to ABA, and regulation of the stomatal aperture, suggesting that ZmMYB3R enhances tolerance to drought and salt stress. qRT-PCR assays revealed elevated expression levels of stress/ABA genes in transgenic plants following stress treatments. Moreover, transgenic plants accumulated higher ABA content than wild-type plants under drought and salt stress conditions. Collectively, these results indicate that ZmMYB3R is a positive transcription factor that enhances tolerance to drought and salt stress via an ABA-dependent pathway. The findings may prove useful for engineering economically important crops.
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Affiliation(s)
- Jiandong Wu
- National Engineering Laboratory of Crop Stress Resistance, College of Life Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Yingli Jiang
- National Engineering Laboratory of Crop Stress Resistance, College of Life Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Yani Liang
- National Engineering Laboratory of Crop Stress Resistance, College of Life Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Long Chen
- National Engineering Laboratory of Crop Stress Resistance, College of Life Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Weijun Chen
- National Engineering Laboratory of Crop Stress Resistance, College of Life Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Beijiu Cheng
- National Engineering Laboratory of Crop Stress Resistance, College of Life Science, Anhui Agricultural University, Hefei, Anhui, 230036, China.
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17
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Zhou Y, He R, Guo Y, Liu K, Huang G, Peng C, Liu Y, Zhang M, Li Z, Duan L. A novel ABA functional analogue B2 enhances drought tolerance in wheat. Sci Rep 2019; 9:2887. [PMID: 30814574 PMCID: PMC6393525 DOI: 10.1038/s41598-019-39013-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 01/11/2019] [Indexed: 12/21/2022] Open
Abstract
Drought stress negatively affects wheat growth and yield. Application of drought agent is an effective way to improve crop drought tolerance, therefore increasing crop yield. Based on the structure of abscisic acid (ABA), Pyrabactin and coronatine (COR), we designed the target compound B2. To investigate the function of B2 in alleviating drought stress on wheat, the drought-resistant variety ND212 and drought-sensitive variety LX99 were used under hydroponic conditions. The results showed that B2 had a similar function with ABA, especially 0.01 μmol·L−1 B2. Under drought stress conditions, 0.01 μmol·L−1 B2 increased the water content of wheat, enhanced the osmotic adjustment ability of leaves, and reduced the toxicity of reactive oxygen species on cells. What’s more, 0.01 μmol·L−1 B2 improved the expression level of ABA-responsive genes TaSnRK2.4 and TaMYB3R1. It also improved the expression level of drought-responsive genes TaSRHP and TaERF3. Taken together, B2 enhanced drought tolerance in wheat by activating ABA signaling pathway.
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Affiliation(s)
- Yuyi Zhou
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Rui He
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Yuling Guo
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Keke Liu
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Guanmin Huang
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Chuanxi Peng
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Yiguo Liu
- College of Agronomy, Qingdao Agricultural University, Qingdao, 266109, China
| | - Mingcai Zhang
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Zhaohu Li
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China
| | - Liusheng Duan
- State Key Laboratory of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing, 100193, China.
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18
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Li W, Qiang XJ, Han XR, Jiang LL, Zhang SH, Han J, He R, Cheng XG. Ectopic Expression of a Thellungiella salsuginea Aquaporin Gene, TsPIP1;1, Increased the Salt Tolerance of Rice. Int J Mol Sci 2018; 19:ijms19082229. [PMID: 30061546 PMCID: PMC6122036 DOI: 10.3390/ijms19082229] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/24/2018] [Accepted: 07/26/2018] [Indexed: 11/25/2022] Open
Abstract
Aquaporins play important regulatory roles in the transport of water and small molecules in plants. In this study, a Thellungiella salsuginea TsPIP1;1 aquaporin was transformed into Kitaake rice, and three transgenic lines were evaluated by profiling the changes of the physiological metabolism, osmotic potential, and differentially expressed genes under salt stress. The TsPIP1;1 protein contains six transmembrane domains and is localized in the cytoplasm membrane. Overexpression of the TsPIP1;1 gene not only increased the accumulation of prolines, soluble sugars and chlorophyll, but also lowered the osmotic potential and malondialdehyde content in rice under salt stress, and alleviated the amount of salt damage done to rice organs by regulating the distribution of Na/K ions, thereby promoting photosynthetic rates. Transcriptome sequencing confirmed that the differentially expressed genes that are up-regulated in rice positively respond to salt stimulus, the photosynthetic metabolic process, and the accumulation profiles of small molecules and Na/K ions. The co-expressed Rubisco and LHCA4 genes in rice were remarkably up-regulated under salt stress. This data suggests that overexpression of the TsPIP1;1 gene is involved in the regulation of water transport, the accumulation of Na/K ions, and the translocation of photosynthetic metabolites, thus conferring enhanced salt tolerance to rice.
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Affiliation(s)
- Wei Li
- Lab of Plant Nutrition Molecular Biology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Xiao-Jing Qiang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Xiao-Ri Han
- College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.
| | - Lin-Lin Jiang
- Lab of Plant Nutrition Molecular Biology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Shu-Hui Zhang
- College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.
| | - Jiao Han
- College of Life Science, Shanxi Normal University, Linfen 041004, China.
| | - Rui He
- College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.
| | - Xian-Guo Cheng
- Lab of Plant Nutrition Molecular Biology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Abhinandan K, Skori L, Stanic M, Hickerson NMN, Jamshed M, Samuel MA. Abiotic Stress Signaling in Wheat - An Inclusive Overview of Hormonal Interactions During Abiotic Stress Responses in Wheat. FRONTIERS IN PLANT SCIENCE 2018; 9:734. [PMID: 29942321 PMCID: PMC6004395 DOI: 10.3389/fpls.2018.00734] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 05/15/2018] [Indexed: 05/19/2023]
Abstract
Rapid global warming directly impacts agricultural productivity and poses a major challenge to the present-day agriculture. Recent climate change models predict severe losses in crop production worldwide due to the changing environment, and in wheat, this can be as large as 42 Mt/°C rise in temperature. Although wheat occupies the largest total harvested area (38.8%) among the cereals including rice and maize, its total productivity remains the lowest. The major production losses in wheat are caused more by abiotic stresses such as drought, salinity, and high temperature than by biotic insults. Thus, understanding the effects of these stresses becomes indispensable for wheat improvement programs which have depended mainly on the genetic variations present in the wheat genome through conventional breeding. Notably, recent biotechnological breakthroughs in the understanding of gene functions and access to whole genome sequences have opened new avenues for crop improvement. Despite the availability of such resources in wheat, progress is still limited to the understanding of the stress signaling mechanisms using model plants such as Arabidopsis, rice and Brachypodium and not directly using wheat as the model organism. This review presents an inclusive overview of the phenotypic and physiological changes in wheat due to various abiotic stresses followed by the current state of knowledge on the identified mechanisms of perception and signal transduction in wheat. Specifically, this review provides an in-depth analysis of different hormonal interactions and signaling observed during abiotic stress signaling in wheat.
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Affiliation(s)
| | | | | | | | | | - Marcus A. Samuel
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
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20
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Zhai Y, Li P, Mei Y, Chen M, Chen X, Xu H, Zhou X, Dong H, Zhang C, Jiang W. Three MYB genes co-regulate the phloem-based defence against English grain aphid in wheat. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:4153-4169. [PMID: 28922762 DOI: 10.1093/jxb/erx204] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Plant phloem-based defence (PBD) against phloem-feeding insects is characteristic of the sieve occlusion by phloem lectins and β-1,3-glucan callose, both of which are produced under regulation by ethylene and MYB transcription factors. Wheat PBD requires β-1,3-glucan synthase-like proteins GSL2, GSL10, and GSL12, and may also require insect-resistant mannose-binding lectins Hfr-1 and Wci-1, which can accumulate in the phloem upon aphid feeding. This study elucidates whether any of the 73 MYB genes identified previously in the common wheat Triticum aestivum genome plays a role in wheat PBD activation with regard to the GSLs and lectins. Wheat MYB genes TaMYB19, TaMYB29, and TaMYB44 are highly activated in response to infestation of English grain aphid, and their silencing facilitates aphid feeding on wheat phloem and represses wheat PBD responses. Repressed PBD is shown to decrease aphid-induced callose deposition in wheat leaf epidermis and decrease aphid-induced expression of genes GSL2, GSL10, GSL12, Hfr-1, and Wci-1 in wheat leaf tissues. Based on single gene silencing effects, TaMYB19, TaMYB29, and TaMYB44 contribute 55-82% of PBD responses. However, the contributions of TaMYB genes to PBD are eliminated by ethylene signalling inhibitors, while simultaneous silencing of the three TaMYB genes cancels the tested PBD responses. Therefore, TaMYB19, TaMYB29, and TaMYB44 are co-regulators of wheat PBD and execute this function through crosstalk with the ethylene signalling pathway.
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Affiliation(s)
- Yan Zhai
- Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
| | - Ping Li
- National Ministry of Education Key Laboratory of Integrated Management of Crop Diseases and Insect Pests, Nanjing 210095, China
| | - Yu Mei
- Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
| | - Mingye Chen
- Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaochen Chen
- National Ministry of Education Key Laboratory of Integrated Management of Crop Diseases and Insect Pests, Nanjing 210095, China
| | - Heng Xu
- National Ministry of Education Key Laboratory of Integrated Management of Crop Diseases and Insect Pests, Nanjing 210095, China
| | - Xuan Zhou
- Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
| | - Hansong Dong
- National Ministry of Education Key Laboratory of Integrated Management of Crop Diseases and Insect Pests, Nanjing 210095, China
| | - Chunling Zhang
- Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
| | - Weihua Jiang
- National Ministry of Education Key Laboratory of Integrated Management of Crop Diseases and Insect Pests, Nanjing 210095, China
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Wu YH, Wang T, Wang K, Liang QY, Bai ZY, Liu QL, Pan YZ, Jiang BB, Zhang L. Comparative Analysis of the Chrysanthemum Leaf Transcript Profiling in Response to Salt Stress. PLoS One 2016; 11:e0159721. [PMID: 27447718 PMCID: PMC4957832 DOI: 10.1371/journal.pone.0159721] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 07/07/2016] [Indexed: 11/18/2022] Open
Abstract
Salt stress has some remarkable influence on chrysanthemum growth and productivity. To understand the molecular mechanisms associated with salt stress and identify genes of potential importance in cultivated chrysanthemum, we carried out transcriptome sequencing of chrysanthemum. Two cDNA libraries were generated from the control and salt-treated samples (Sample_0510_control and Sample_0510_treat) of leaves. By using the Illumina Solexa RNA sequencing technology, 94 million high quality sequencing reads and 161,522 unigenes were generated and then we annotated unigenes through comparing these sequences to diverse protein databases. A total of 126,646 differentially expressed transcripts (DETs) were identified in leaf. Plant hormones, amino acid metabolism, photosynthesis and secondary metabolism were all changed under salt stress after the complete list of GO term and KEGG enrichment analysis. The hormone biosynthesis changing and oxidative hurt decreasing appeared to be significantly related to salt tolerance of chrysanthemum. Important protein kinases and major transcription factor families involved in abiotic stress were differentially expressed, such as MAPKs, CDPKs, MYB, WRKY, AP2 and HD-zip. In general, these results can help us to confirm the molecular regulation mechanism and also provide us a comprehensive resource of chrysanthemum under salt stress.
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Affiliation(s)
- Yin-Huan Wu
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Tong Wang
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ke Wang
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qian-Yu Liang
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Zhen-Yu Bai
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qing-Lin Liu
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
- * E-mail:
| | - Yuan-Zhi Pan
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Bei-Bei Jiang
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Lei Zhang
- Department of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China
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Zhao P, Liu P, Yuan G, Jia J, Li X, Qi D, Chen S, Ma T, Liu G, Cheng L. New Insights on Drought Stress Response by Global Investigation of Gene Expression Changes in Sheepgrass (Leymus chinensis). FRONTIERS IN PLANT SCIENCE 2016; 7:954. [PMID: 27446180 PMCID: PMC4928129 DOI: 10.3389/fpls.2016.00954] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 06/15/2016] [Indexed: 05/09/2023]
Abstract
Water is a critical environmental factor that restricts the geographic distribution of plants. Sheepgrass [Leymus chinensis, (Trin.) Tzvel] is an important forage grass in the Eurasia Steppe and a close germplasm for wheat and barley. This native grass adapts well to adverse environments such as cold, salinity, alkalinity and drought, and it can survive when the soil moisture may be less than 6% in dry seasons. However, little is known about how sheepgrass tolerates water stress at the molecular level. Here, drought stress experiment and RNA-sequencing (RNA-seq) was performed in three pools of RNA samples (control, drought stress, and rewatering). We found that sheepgrass seedlings could still survive when the soil water content (SWC) was reduced to 14.09%. Differentially expressed genes (DEGs) analysis showed that 7320 genes exhibited significant responses to drought stress. Of these DEGs, 2671 presented opposite expression trends before and after rewatering. Furthermore, ~680 putative sheepgrass-specific water responsive genes were revealed that can be studied deeply. Gene ontology (GO) annotation revealed that stress-associated genes were activated extensively by drought treatment. Interestingly, cold stress-related genes were up-regulated greatly after drought stress. The DEGs of MAPK and calcium signal pathways, plant hormone ABA, jasmonate, ethylene, brassinosteroid signal pathways, cold response CBF pathway participated coordinatively in sheepgrass drought stress response. In addition, we identified 288 putative transcription factors (TFs) involved in drought response, among them, the WRKY, NAC, AP2/ERF, bHLH, bZIP, and MYB families were enriched, and might play crucial and significant roles in drought stress response of sheepgrass. Our research provided new and valuable information for understanding the mechanism of drought tolerance in sheepgrass. Moreover, the identification of genes involved in drought response can facilitate the genetic improvement of crops by molecular breeding.
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Affiliation(s)
- Pincang Zhao
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
- College of Life Sciences, University of Chinese Academy of SciencesBeijing, China
| | - Panpan Liu
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
- College of Life Sciences, University of Chinese Academy of SciencesBeijing, China
| | - Guangxiao Yuan
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
- College of Life Sciences, University of Chinese Academy of SciencesBeijing, China
| | - Junting Jia
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
- College of Life Sciences, University of Chinese Academy of SciencesBeijing, China
| | - Xiaoxia Li
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Dongmei Qi
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Shuangyan Chen
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Tian Ma
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Gongshe Liu
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Liqin Cheng
- Key Laboratory of Plant Resources, Institute of Botany, The Chinese Academy of SciencesBeijing, China
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Gul A, Ahad A, Akhtar S, Ahmad Z, Rashid B, Husnain T. Microarray: gateway to unravel the mystery of abiotic stresses in plants. Biotechnol Lett 2015; 38:527-43. [PMID: 26667130 DOI: 10.1007/s10529-015-2010-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
Abstract
Environmental factors, such as drought, salinity, extreme temperature, ozone poisoning, metal toxicity etc., significantly affect crops. To study these factors and to design a possible remedy, biological experimental data concerning these crops requires the quantification of gene expression and comparative analyses at high throughput level. Development of microarrays is the platform to study the differential expression profiling of the targeted genes. This technology can be applied to gene expression studies, ranging from individual genes to whole genome level. It is now possible to perform the quantification of the differential expression of genes on a glass slide in a single experiment. This review documents recently published reports on the use of microarrays for the identification of genes in different plant species playing their role in different cellular networks under abiotic stresses. The regulation pattern of differentially-expressed genes, individually or in group form, may help us to study different pathways and functions at the cellular and molecular level. These studies can provide us with a lot of useful information to unravel the mystery of abiotic stresses in important crop plants.
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Affiliation(s)
- Ambreen Gul
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Ammara Ahad
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Sidra Akhtar
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Zarnab Ahmad
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan
| | - Bushra Rashid
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan.
| | - Tayyab Husnain
- Centre of Excellence in Molecular Biology, University of the Punjab Lahore, 87 W Canal Bank Road, Thokar Niaz Baig, Lahore, 53700, Pakistan
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Cai H, Tian S, Dong H, Guo C. Pleiotropic effects of TaMYB3R1 on plant development and response to osmotic stress in transgenic Arabidopsis. Gene 2015; 558:227-34. [PMID: 25560188 DOI: 10.1016/j.gene.2014.12.066] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 11/02/2014] [Accepted: 12/29/2014] [Indexed: 11/25/2022]
Abstract
In a previous study, we isolated and characterized TaMYB3R1, a MYB3R gene, from wheat (Triticum aestivum L.). In vitro assays showed that the TaMYB3R1 protein is localized to the nucleus, and functions as an MSA-binding transcriptional activator. Expression of TaMYB3R1 is induced by exogenous abscisic acid (ABA) and abiotic stress, which encouraged us to further investigate its function in planta. In the present study, we generated transgenic Arabidopsis plants overexpressing TaMYB3R1. Compared with wild-type plants, the transgenic lines produced more rosette leaves, and thus more inflorescences, but the plants showed delayed development at the reproductive stage. The TaMYB3R1 protein also functions in the osmotic stress response. Transgenic Arabidopsis plants showed enhanced tolerance to drought and salt stresses, and the tolerance phenotype was conveyed by limiting transpiration through increasing stomatal closure as well as reducing water loss. In addition, TaMYB3R1 influenced the expression of both ABA-dependent and ABA-independent responsive genes, implicating TaMYB3R1 in diverse osmotic stress-response mechanisms in Arabidopsis. Our study sheds light on novel functions of a plant MYB3R protein.
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Affiliation(s)
- Hongsheng Cai
- Key Laboratory of Molecular and Cytogenetics of Heilongjiang Province, College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Shan Tian
- Ministry of Agriculture of PR China Key Laboratory of Monitoring and Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing 210095, China
| | - Hansong Dong
- Ministry of Agriculture of PR China Key Laboratory of Monitoring and Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing 210095, China.
| | - Changhong Guo
- Key Laboratory of Molecular and Cytogenetics of Heilongjiang Province, College of Life Science and Technology, Harbin Normal University, Harbin 150025, China.
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25
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Li JB, Luan YS, Yin YL. SpMYB overexpression in tobacco plants leads to altered abiotic and biotic stress responses. Gene 2014; 547:145-51. [PMID: 24971506 DOI: 10.1016/j.gene.2014.06.049] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 05/16/2014] [Accepted: 06/23/2014] [Indexed: 11/30/2022]
Abstract
The MYB transcription factors are involved in various plant biochemistry and physiology processes and play a central role in plant defense response. In the present study, a full-length cDNA sequence of a MYB gene, designated as SpMYB, was isolated from tomato. SpMYB encodes the R2R3-type protein consisting of 328 amino acids. The expression level of SpMYB was strongly induced by fungal pathogens. Transgenic tobacco plants overexpressing SpMYB had an enhanced salt and drought stress tolerance compared with wild-type plants, and showed significantly improved resistance to Alternaria alternate. Further analysis revealed that transgenic tobaccos exhibited less accumulation of malondialdehyde (MDA) and more accumulation of superoxide dismutase (SOD), peroxidase (POD) and phenylalanine ammonia-lyase (PAL) after inoculation with A. alternate. Meanwhile, changes in some photosynthetic parameters, such as photosynthetic rate (Pn), transpiration rate (Tr) and intercellular CO2 concentration (Ci) were also found in the transgenic tobaccos. Furthermore, transgenic tobaccos constitutively accumulated higher levels of pathogenesis-related (PR) gene transcripts, such as PR1 and PR2. The results suggested that the tomato SpMYB transcription factor plays an important role in responses to abiotic and biotic stress.
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Affiliation(s)
- Jing-Bin Li
- School of Life science and Biotechnology, Dalian University of Technology, Dalian 116024, China
| | - Yu-Shi Luan
- School of Life science and Biotechnology, Dalian University of Technology, Dalian 116024, China.
| | - Ya-Li Yin
- School of Life science and Biotechnology, Dalian University of Technology, Dalian 116024, China
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26
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Alvarez S, Roy Choudhury S, Pandey S. Comparative quantitative proteomics analysis of the ABA response of roots of drought-sensitive and drought-tolerant wheat varieties identifies proteomic signatures of drought adaptability. J Proteome Res 2014; 13:1688-701. [PMID: 24475748 DOI: 10.1021/pr401165b] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Wheat is one of the most highly cultivated cereals in the world. Like other cultivated crops, wheat production is significantly affected by abiotic stresses such as drought. Multiple wheat varieties suitable for different geographical regions of the world have been developed that are adapted to different environmental conditions; however, the molecular basis of such adaptations remains unknown in most cases. We have compared the quantitative proteomics profile of the roots of two different wheat varieties, Nesser (drought-tolerant) and Opata (drought-sensitive), in the absence and presence of abscisic acid (ABA, as a proxy for drought). A labeling LC-based quantitative proteomics approach using iTRAQ was applied to elucidate the changes in protein abundance levels. Quantitative differences in protein levels were analyzed for the evaluation of inherent differences between the two varieties as well as the overall and variety-specific effect of ABA on the root proteome. This study reveals the most elaborate ABA-responsive root proteome identified to date in wheat. A large number of proteins exhibited inherently different expression levels between Nesser and Opata. Additionally, significantly higher numbers of proteins were ABA-responsive in Nesser roots compared with Opata roots. Furthermore, several proteins showed variety-specific regulation by ABA, suggesting their role in drought adaptation.
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Affiliation(s)
- Sophie Alvarez
- Donald Danforth Plant Science Center , 975 North Warson Road, St. Louis, Missouri 63132, United States
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27
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Identification of 30 MYB transcription factor genes and analysis of their expression during abiotic stress in peanut (Arachis hypogaea L.). Gene 2014; 533:332-45. [DOI: 10.1016/j.gene.2013.08.092] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 08/26/2013] [Accepted: 08/28/2013] [Indexed: 01/06/2023]
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28
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Drought tolerance in modern and wild wheat. ScientificWorldJournal 2013; 2013:548246. [PMID: 23766697 PMCID: PMC3671283 DOI: 10.1155/2013/548246] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 04/03/2013] [Indexed: 11/18/2022] Open
Abstract
The genus Triticum includes bread (Triticum aestivum) and durum wheat (Triticum durum) and constitutes a major source for human food consumption. Drought is currently the leading threat on world's food supply, limiting crop yield, and is complicated since drought tolerance is a quantitative trait with a complex phenotype affected by the plant's developmental stage. Drought tolerance is crucial to stabilize and increase food production since domestication has limited the genetic diversity of crops including wild wheat, leading to cultivated species, adapted to artificial environments, and lost tolerance to drought stress. Improvement for drought tolerance can be achieved by the introduction of drought-grelated genes and QTLs to modern wheat cultivars. Therefore, identification of candidate molecules or loci involved in drought tolerance is necessary, which is undertaken by "omics" studies and QTL mapping. In this sense, wild counterparts of modern varieties, specifically wild emmer wheat (T. dicoccoides), which are highly tolerant to drought, hold a great potential. Prior to their introgression to modern wheat cultivars, drought related candidate genes are first characterized at the molecular level, and their function is confirmed via transgenic studies. After integration of the tolerance loci, specific environment targeted field trials are performed coupled with extensive analysis of morphological and physiological characteristics of developed cultivars, to assess their performance under drought conditions and their possible contributions to yield in certain regions. This paper focuses on recent advances on drought related gene/QTL identification, studies on drought related molecular pathways, and current efforts on improvement of wheat cultivars for drought tolerance.
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29
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Wendelboe-Nelson C, Morris PC. Proteins linked to drought tolerance revealed by DIGE analysis of drought resistant and susceptible barley varieties. Proteomics 2013; 12:3374-85. [PMID: 23001927 DOI: 10.1002/pmic.201200154] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 08/13/2012] [Accepted: 09/10/2012] [Indexed: 01/01/2023]
Abstract
Drought is a major threat to world agriculture. In order to identify proteins associated with plant drought tolerance, barley varieties bred in the UK (Golden Promise) and Iraq (Basrah) were compared. The variety Basrah showed physiological adaptations to drought when compared to Golden Promise, for example relative water content of roots and shoots after 1 week of drought was much higher for Basrah than for Golden Promise. DIGE analysis was carried out on proteins from roots and leaves under control and drought conditions. Twenty-four leaf and 45 root proteins were identified by MALDI-TOF MS. The relative expression patterns of the identified proteins fell into a number of distinct classes. The variety Basrah is characterised by constitutive expression or higher drought-induced expression levels of proteins regulating ROS production and protein folding. Photosynthetic enzymes, by contrast, were downregulated in Basrah. Enzyme assays showed a good correlation between DIGE-derived protein abundance estimates and enzyme activity in extracts. Overall, this study shows that the enhanced drought tolerance of variety Basrah is driven by an enhanced regulation of ROS under drought.
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Wang CS, Hsu SW, Hsu YF. New insights into desiccation-associated gene regulation by Lilium longiflorum ASR during pollen maturation and in transgenic Arabidopsis. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2013; 301:37-94. [PMID: 23317817 DOI: 10.1016/b978-0-12-407704-1.00002-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
LLA23, a member of the abscisic acid-, stress-, and ripening-induced (ASR) protein family, was previously isolated from lily (Lilium longiflorum) pollen. The lily ASR is induced through desiccation-associated ABA signaling transduction in the pollen. ASRs are highly hydrophilic and intrinsically unstructured proteins with molecular masses generally less than 18 kDa. LLA23 is abundant in the cytoplasm and nuclei of both vegetative and generative cells of pollen grains. The protein in the nucleus and in the cytoplasm is partly regulated by dehydration. A dual role is proposed for LLA23, as a regulator and a protective molecule, upon exposure to water deficits. This chapter reviews the current state of literature on Asr genes, protein structure, function, and their responses to various stresses. In a study, a genome-wide microarray was used to monitor the expression of LLA23-regulated genes, focusing on the relationship between ASR-, glucose-, and drought-inducible genes, and outlined the difference and cross talk of gene expression among these signaling networks. A strong association was observed in the expression of stress-responsive genes and found 25 genes that respond to all three treatments. Highly inducible genes were also found in each specific stress treatment. Promoter sequence analysis of LLA23-inducible genes enabled us not only to identify possible known cis-acting elements in the promoter regions but also to expect the existence of novel cis-acting elements involved in ASR-responsive gene expression. ASR can be used to improve crops and economically important plants against various environmental stresses.
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Affiliation(s)
- Co-Shine Wang
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, Taiwan.
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31
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Genomic associations for drought tolerance on the short arm of wheat chromosome 4B. Funct Integr Genomics 2012; 12:447-64. [PMID: 22476619 DOI: 10.1007/s10142-012-0276-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Revised: 03/06/2012] [Accepted: 03/19/2012] [Indexed: 02/07/2023]
Abstract
Drought is a major constraint to maintaining yield stability of wheat in rain fed and limited irrigation agro-ecosystems. Genetic improvement for drought tolerance in wheat has been difficult due to quantitative nature of the trait involving multiple genes with variable effects and lack of effective selection strategies employing molecular markers. Here, a framework molecular linkage map was constructed using 173 DNA markers randomly distributed over the 21 wheat chromosomes. Grain yield and other drought-responsive shoot and root traits were phenotyped for 2 years under drought stress and well-watered conditions on a mapping population of recombinant inbred lines (RILs) derived from a cross between drought-sensitive semidwarf variety "WL711" and drought-tolerant traditional variety "C306". Thirty-seven genomics region were identified for 10 drought-related traits at 18 different chromosomal locations but most of these showed small inconsistent effects. A consistent genomic region associated with drought susceptibility index (qDSI.4B.1) was mapped on the short arm of chromosome 4B, which also controlled grain yield per plant, harvest index, and root biomass under drought. Transcriptome profiling of the parents and two RIL bulks with extreme phenotypes revealed five genes underlying this genomic region that were differentially expressed between the parents as well as the two RIL bulks, suggesting that they are likely candidates for drought tolerance. Syntenic genomic regions of barley, rice, sorghum, and maize genomes were identified that also harbor genes for drought tolerance. Markers tightly linked to this genomic region in combination with other important regions on group 7 chromosomes may be used in marker-assisted breeding for drought tolerance in wheat.
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Ma J, He Y, Hu Z, Xu W, Xia J, Guo C, Lin S, Cao L, Chen C, Wu C, Zhang J. Characterization and expression analysis of AcSERK2, a somatic embryogenesis and stress resistance related gene in pineapple. Gene 2012; 500:115-23. [PMID: 22465534 DOI: 10.1016/j.gene.2012.03.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 03/04/2012] [Indexed: 10/28/2022]
Abstract
The isolation and characterization of AcSERK2, another somatic embryogenesis receptor-like kinase (SERK) gene homolog, confirmed that there was a SERK gene family in pineapple. AcSERK2 shared high similarity to AcSERK1 and other SERKs, containing all the characteristic domains of the SERK family. The expressed recombinant protein of pET-AcSERK2 was soluble. AcSERK2 expression was effectively induced by 2,4-dichlorophenoxyacetic acid (2,4-D) and maintained in high level at the early stage of somatic embryogenesis (SE). The results of in situ hybridization showed that AcSERK2 expressed at high level in the competent cells under the induction of 2, 4-D and at low level during the development of meristematic center to globular embryo. This indicated that AcSERK2 could be used as a potential marker gene to monitor the acquisition of embryogenic competence. However, AcSERK2 expression was also detected in all the tested organs and the expression level decreased along with the development of calyx, ovule and ovary. These results suggested that AcSERK2 maybe play a broader role in organ development. AcSERK2 transcription could be induced by exogenous hormones and abiotic stress. It was deduced that AcSERK2 may participate in response to exogenous hormones and abiotic stress regulation in pineapple. The expression pattern of AcSERK2 during SE differed from that of AcSERK1, and this indicated that the SERK genes may be non-redundant in somatic embryogenesis.
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Affiliation(s)
- Jun Ma
- Horticultural Biotechnology College of South China Agricultural University, Guangzhou, Guangdong, China.
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