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Gao Y, Zhao X, Liu X, Liu C, Zhang K, Zhang X, Zhou J, Dong G, Wang Y, Huang J, Yang Z, Zhou Y, Yao Y. OsRAV1 Regulates Seed Vigor and Salt Tolerance During Germination in Rice. RICE (NEW YORK, N.Y.) 2024; 17:56. [PMID: 39218839 PMCID: PMC11366736 DOI: 10.1186/s12284-024-00734-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2024] [Accepted: 08/22/2024] [Indexed: 09/04/2024]
Abstract
Seed vigor is a complex trait encompassing seed germination, seedling emergence, growth, seed longevity, and stress tolerance, all are crucial for direct seeding in rice. Here, we report that the AP2/ERF transcription factor OsRAV1 (RELATED TO ABI3 AND VP1) positively regulates seed germination, vigor, and salt tolerance. Additionally, OsRAV1 was differently expressed in embryo and endosperm, with the OsRAV1 localized in the nucleus. Transcriptomic analysis revealed that OsRAV1 modulates seed vigor through plant hormone signal transduction and phenylpropanoid biosynthesis during germination. Haplotype analysis showed that rice varieties carrying Hap3 displayed enhanced salt tolerance during seed germination. These findings suggest that OsRAV1 is a potential target in breeding rice varieties with high seed vigor suitable for direct seeding cultivation.
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Affiliation(s)
- Yingbo Gao
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Xinyi Zhao
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Xin Liu
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Chang Liu
- Guangling College, Yangzhou University, Yangzhou, 225000, China
| | - Kunming Zhang
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Xiaoxiang Zhang
- Jiangsu Lixiahe District Institute of Agricultural Sciences, Yangzhou, 225007, China
| | - Juan Zhou
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Guichun Dong
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Youping Wang
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Jianye Huang
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Zefeng Yang
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China.
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China.
| | - Yong Zhou
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China.
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China.
| | - Youli Yao
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009, China.
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China.
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Guo S, Ai J, Zheng N, Hu H, Xu Z, Chen Q, Li L, Liu Y, Zhang H, Li J, Pan Q, Chen F, Yuan L, Fu J, Gu R, Wang J, Du X. A genome-wide association study uncovers a ZmRap2.7-ZCN9/ZCN10 module to regulate ABA signalling and seed vigour in maize. PLANT BIOTECHNOLOGY JOURNAL 2024; 22:2472-2487. [PMID: 38761386 PMCID: PMC11331778 DOI: 10.1111/pbi.14362] [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: 12/05/2023] [Revised: 03/20/2024] [Accepted: 03/24/2024] [Indexed: 05/20/2024]
Abstract
Seed vigour, including rapid, uniform germination and robust seedling establishment under various field conditions, is becoming an increasingly essential agronomic trait for achieving high yield in crops. However, little is known about this important seed quality trait. In this study, we performed a genome-wide association study to identify a key transcription factor ZmRap2.7, which regulates seed vigour through transcriptionally repressing expressions of three ABA signalling genes ZmPYL3, ZmPP2C and ZmABI5 and two phosphatidylethanolamine-binding genes ZCN9 and ZCN10. In addition, ZCN9 and ZCN10 proteins could interact with ZmPYL3, ZmPP2C and ZmABI5 proteins, and loss-of-function of ZmRap2.7 and overexpression of ZCN9 and ZCN10 reduced ABA sensitivity and seed vigour, suggesting a complex regulatory network for regulation of ABA signalling mediated seed vigour. Finally, we showed that four SNPs in ZmRap2.7 coding region influenced its transcriptionally binding activity to the downstream gene promoters. Together with previously identified functional variants within and surrounding ZmRap2.7, we concluded that the distinct allelic variations of ZmRap2.7 were obtained independently during maize domestication and improvement, and responded separately for the diversities of seed vigour, flowering time and brace root development. These results provide novel genes, a new regulatory network and an evolutional mechanism for understanding the molecular mechanism of seed vigour.
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Affiliation(s)
- Shasha Guo
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Junmin Ai
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Nannan Zheng
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Hairui Hu
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Zhuoyi Xu
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Quanquan Chen
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Li Li
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Yunjun Liu
- Institute of Crop Science, Chinese Academy of Agricultural SciencesBeijingChina
| | - Hongwei Zhang
- Institute of Crop Science, Chinese Academy of Agricultural SciencesBeijingChina
| | - Jieping Li
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, National Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijingChina
| | - Qingchun Pan
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, National Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijingChina
| | - Fanjun Chen
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, National Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijingChina
| | - Lixing Yuan
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, National Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijingChina
| | - Junjie Fu
- Institute of Crop Science, Chinese Academy of Agricultural SciencesBeijingChina
| | - Riliang Gu
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
- Joint Research Institute of China Agricultural University in AksuAksuChina
| | - Jianhua Wang
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
| | - Xuemei Du
- State Key Laboratory of Maize Bio‐breeding, Beijing Innovation Center for Crop Seed Technology (MOA), College of Agronomy and BiotechnologyChina Agricultural UniversityBeijingChina
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Li G, Xie J, Zhang W, Meng F, Yang M, Fan X, Sun X, Zheng Y, Zhang Y, Wang M, Chen Q, Wang S, Jiang H. Integrated examination of the transcriptome and metabolome of the gene expression response and metabolite accumulation in soybean seeds for seed storability under aging stress. FRONTIERS IN PLANT SCIENCE 2024; 15:1437107. [PMID: 39040511 PMCID: PMC11261460 DOI: 10.3389/fpls.2024.1437107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 06/25/2024] [Indexed: 07/24/2024]
Abstract
Soybean quality and production are determined by seed viability. A seed's capacity to sustain germination via dry storage is known as its seed life. Thus, one of the main objectives for breeders is to preserve genetic variety and gather germplasm resources. However, seed quality and germplasm preservation have become significant obstacles. In this study, four artificially simulated aging treatment groups were set for 0, 24, 72, and 120 hours. Following an aging stress treatment, the transcriptome and metabolome data were compared in two soybean lines with notable differences in seed vigor-R31 (aging sensitive) and R80 (aging tolerant). The results showed that 83 (38 upregulated and 45 downregulated), 30 (19 upregulated and 11 downregulated), 90 (52 upregulated and 38 downregulated), and 54 (25 upregulated and 29 downregulated) DEGs were differentially expressed, respectively. A total of 62 (29 upregulated and 33 downregulated), 94 (49 upregulated and 45 downregulated), 91 (53 upregulated and 38 downregulated), and 135 (111 upregulated and 24 downregulated) differential metabolites accumulated. Combining the results of transcriptome and metabolome investigations demonstrated that the difference between R31 and R80 responses to aging stress was caused by genes related to phenylpropanoid metabolism pathway, which is linked to the seed metabolite caffeic acid. According to this study's preliminary findings, the aging-resistant line accumulated more caffeic acid than the aging-sensitive line, which improved its capacity to block lipoxygenase (LOX) activity. An enzyme activity inhibition test was used to demonstrate the effect of caffeic acid. After soaking seeds in 1 mM caffeic acid (a LOX inhibitor) for 6 hours and artificially aging them for 24 hours, the germination rates of the R31 and R80 seeds were enhanced. In conclusion, caffeic acid has been shown to partially mitigate the negative effects of soybean seed aging stress and to improve seed vitality. This finding should serve as a theoretical foundation for future research on the aging mechanism of soybean seeds.
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Affiliation(s)
- Guang Li
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Jianguo Xie
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Wei Zhang
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Fanfan Meng
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Mingliang Yang
- Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Xuhong Fan
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Xingmiao Sun
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Yuhong Zheng
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Yunfeng Zhang
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Mingliang Wang
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Qingshan Chen
- Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Shuming Wang
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
| | - Hongwei Jiang
- Jilin Academy of Agricultural Sciences (China Agricultural Science and Technology Northeast Innovation Center), Soybean Research Institute, Changchun, China
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Kamble NU, Ghosh S, Petla BP, Achary RK, Gautam S, Rao V, Salvi P, Hazra A, Varshney V, Majee M. PROTEIN L-ISOASPARTYL METHYLTRANSFERASE protects enolase dysfunction by repairing isoaspartyl-induced damage and is positively implicated in agronomically important seed traits. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 119:413-431. [PMID: 38625788 DOI: 10.1111/tpj.16771] [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: 10/04/2023] [Revised: 03/27/2024] [Accepted: 03/31/2024] [Indexed: 04/18/2024]
Abstract
The protein-repairing enzyme (PRE) PROTEIN L-ISOASPARTYL METHYLTRANSFERASE (PIMT) influences seed vigor by repairing isoaspartyl-mediated protein damage in seeds. However, PIMTs function in other seed traits, and the mechanisms by which PIMT affects such seed traits are still poorly understood. Herein, through molecular, biochemical, and genetic studies using overexpression and RNAi lines in Oryza sativa and Arabidopsis thaliana, we demonstrate that PIMT not only affects seed vigor but also affects seed size and weight by modulating enolase (ENO) activity. We have identified ENO2, a glycolytic enzyme, as a PIMT interacting protein through Y2H cDNA library screening, and this interaction was further validated by BiFC and co-immunoprecipitation assay. We show that mutation or suppression of ENO2 expression results in reduced seed vigor, seed size, and weight. We also proved that ENO2 undergoes isoAsp modification that affects its activity in both in vivo and in vitro conditions. Further, using MS/MS analyses, amino acid residues that undergo isoAsp modification in ENO2 were identified. We also demonstrate that PIMT repairs such isoAsp modification in ENO2 protein, protecting its vital cellular functions during seed maturation and storage, and plays a vital role in regulating seed size, weight, and seed vigor. Taken together, our study identified ENO2 as a novel substrate of PIMT, and both ENO2 and PIMT in turn implicate in agronomically important seed traits.
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Affiliation(s)
- Nitin Uttam Kamble
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Shraboni Ghosh
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Bhanu Prakash Petla
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Rakesh Kumar Achary
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Shikha Gautam
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Venkateswara Rao
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Prafull Salvi
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Abhijit Hazra
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Vishal Varshney
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
| | - Manoj Majee
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, Delhi, 110067, New Delhi, India
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Ding Y, Hou D, Yin Y, Chen K, He J, Yan S, Li H, Xiong Y, Zhou W, Li M. Genetic dissection of Brassica napus seed vigor after aging. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2024; 137:141. [PMID: 38789698 DOI: 10.1007/s00122-024-04648-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/10/2024] [Indexed: 05/26/2024]
Abstract
KEY MESSAGE Stable and novel QTLs that affect seed vigor under different storage durations were discovered, and BnaOLE4, located in the interval of cqSW-C2-3, increased seed vigor after aging. Seed vigor is an important trait in crop breeding; however, the underlying molecular regulatory mechanisms governing this trait in rapeseed remain largely unknown. In the present study, vigor-related traits were analyzed in seeds from a doubled haploid (DH) rapeseed (Brassica napus) population grown in 2 different environments using seeds stored for 7, 5, and 3 years under natural storage conditions. A total of 229 quantitative trait loci (QTLs) were identified and were found to explain 3.78%-17.22% of the phenotypic variance for seed vigor-related traits after aging. We further demonstrated that seed vigor-related traits were positively correlated with oil content (OC) but negatively correlated with unsaturated fatty acids (FAs). Some pleiotropic QTLs that collectively regulate OC, FAs, and seed vigor, such as uq.A8, uq.A3-2, uq.A9-2, and uq.C3-1, were identified. The transcriptomic results from extreme pools of DH lines with distinct seed vigor phenotypes during accelerated aging revealed that various biological pathways and metabolic processes (such as glutathione metabolism and reactive oxygen species) were involved in seed vigor. Through integration of QTL analysis and RNA-Seq, a regulatory network for the control of seed vigor was constructed. Importantly, a candidate (BnaOLE4) from cqSW-C2-3 was selected for functional analysis, and transgenic lines overexpressing BnaOLE4 showed increased seed vigor after artificial aging. Collectively, these results provide novel information on QTL and potential candidate genes for molecular breeding for improved seed storability.
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Affiliation(s)
- Yiran Ding
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Dalin Hou
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Yongtai Yin
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Kang Chen
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Jianjie He
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Shuxiang Yan
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Huaixin Li
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Yiyi Xiong
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Weixian Zhou
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China
| | - Maoteng Li
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Wuhan, 430074, China.
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Gao W, Jiang Y, Yang X, Li T, Zhang L, Yan S, Cao J, Lu J, Ma C, Chang C, Zhang H. Functional analysis of a wheat class III peroxidase gene, TaPer12-3A, in seed dormancy and germination. BMC PLANT BIOLOGY 2024; 24:318. [PMID: 38654190 PMCID: PMC11040755 DOI: 10.1186/s12870-024-05041-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 04/18/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND Class III peroxidases (PODs) perform crucial functions in various developmental processes and responses to biotic and abiotic stresses. However, their roles in wheat seed dormancy (SD) and germination remain elusive. RESULTS Here, we identified a wheat class III POD gene, named TaPer12-3A, based on transcriptome data and expression analysis. TaPer12-3A showed decreasing and increasing expression trends with SD acquisition and release, respectively. It was highly expressed in wheat seeds and localized in the endoplasmic reticulum and cytoplasm. Germination tests were performed using the transgenic Arabidopsis and rice lines as well as wheat mutant mutagenized with ethyl methane sulfonate (EMS) in Jing 411 (J411) background. These results indicated that TaPer12-3A negatively regulated SD and positively mediated germination. Further studies showed that TaPer12-3A maintained H2O2 homeostasis by scavenging excess H2O2 and participated in the biosynthesis and catabolism pathways of gibberellic acid and abscisic acid to regulate SD and germination. CONCLUSION These findings not only provide new insights for future functional analysis of TaPer12-3A in regulating wheat SD and germination but also provide a target gene for breeding wheat varieties with high pre-harvest sprouting resistance by gene editing technology.
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Affiliation(s)
- Wei Gao
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Yating Jiang
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Xiaohu Yang
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Ting Li
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Litian Zhang
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Shengnan Yan
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Jiajia Cao
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Jie Lu
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Chuanxi Ma
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China
| | - Cheng Chang
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China.
| | - Haiping Zhang
- College of Agronomy, Anhui Agricultural University, Key Laboratory of Wheat Biology and Genetic Improvement on Southern Yellow & Huai River Valley, Ministry of Agriculture and Rural Affairs, Hefei, Anhui, 230036, China.
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7
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Zheng Q, Teng Z, Zhang J, Ye N. ABA Inhibits Rice Seed Aging by Reducing H 2O 2 Accumulation in the Radicle of Seeds. PLANTS (BASEL, SWITZERLAND) 2024; 13:809. [PMID: 38592812 PMCID: PMC10976155 DOI: 10.3390/plants13060809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/05/2024] [Accepted: 03/10/2024] [Indexed: 04/11/2024]
Abstract
The seed, a critical organ in higher plants, serves as a primary determinant of agricultural productivity, with its quality directly influencing crop yield. Improper storage conditions can diminish seed vigor, adversely affecting seed germination and seedling establishment. Therefore, understanding the seed-aging process and exploring strategies to enhance seed-aging resistance are paramount. In this study, we observed that seed aging during storage leads to a decline in seed vigor and can coincide with the accumulation of hydrogen peroxide (H2O2) in the radicle, resulting in compromised or uneven germination and asynchronous seedling emergence. We identified the abscisic acid (ABA) catabolism gene, abscisic acid 8'-hydroxylase 2 (OsABA8ox2), as significantly induced by aging treatment. Interestingly, transgenic seeds overexpressing OsABA8ox2 exhibited reduced seed vigor, while gene knockout enhanced seed vigor, suggesting its role as a negative regulator. Similarly, seeds pretreated with ABA or diphenyleneiodonium chloride (DPI, an H2O2 inhibitor) showed increased resistance to aging, with more robust early seedling establishment. Both OsABA8ox2 mutant seeds and seeds pretreated with ABA or DPI displayed lower H2O2 content during aging treatment. Overall, our findings indicate that ABA mitigates rice seed aging by reducing H2O2 accumulation in the radicle. This study offers valuable germplasm resources and presents a novel approach to enhancing seed resistance against aging.
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Affiliation(s)
- Qin Zheng
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (Q.Z.); (Z.T.)
| | - Zhenning Teng
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (Q.Z.); (Z.T.)
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin 999077, Hong Kong
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen 518057, China
| | - Jianhua Zhang
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin 999077, Hong Kong
- Department of Biology, Hong Kong Baptist University, Kowloon 999077, Hong Kong
| | - Nenghui Ye
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (Q.Z.); (Z.T.)
- Department of Biology, Hong Kong Baptist University, Kowloon 999077, Hong Kong
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Zheng X, Yuan Z, Yu Y, Yu S, He H. OsCSD2 and OsCSD3 Enhance Seed Storability by Modulating Antioxidant Enzymes and Abscisic Acid in Rice. PLANTS (BASEL, SWITZERLAND) 2024; 13:310. [PMID: 38276765 PMCID: PMC10818270 DOI: 10.3390/plants13020310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 01/13/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
Seed deterioration during storage poses a significant challenge to rice production, leading to a drastic decline in both edible quality and viability, thereby impacting overall crop yield. This study aimed to address this issue by further investigating candidate genes associated with two previously identified QTLs for seed storability through genome association analysis. Among the screened genes, two superoxide dismutase (SOD) genes, OsCSD2 (Copper/zinc Superoxide Dismutase 2) and OsCSD3, were selected for further study. The generation of overexpression and CRISPR/Cas9 mutant transgenic lines revealed that OsCSD2 and OsCSD3 play a positive regulatory role in enhancing rice seed storability. Subsequent exploration of the physiological mechanisms demonstrated that overexpression lines exhibited lower relative electrical conductivity, indicative of reduced cell membrane damage, while knockout lines displayed the opposite trend. Furthermore, the overexpression lines of OsCSD2 and OsCSD3 showed significant increases not only in SOD but also in CAT and POD activities, highlighting an augmented antioxidant system in the transgenic seeds. Additionally, hormone profiling indicated that ABA contributed to the improved seed storability observed in these lines. In summary, these findings provide valuable insights into the regulatory mechanisms of OsCSDs in rice storability, with potential applications for mitigating grain loss and enhancing global food security.
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Affiliation(s)
- Xiaohai Zheng
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.Z.); (Z.Y.); (Y.Y.); (S.Y.)
| | - Zhiyang Yuan
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.Z.); (Z.Y.); (Y.Y.); (S.Y.)
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Yuye Yu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.Z.); (Z.Y.); (Y.Y.); (S.Y.)
- Beijing Bio Huaxing Gene Technology Co., Ltd., Beijing 102260, China
| | - Sibin Yu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.Z.); (Z.Y.); (Y.Y.); (S.Y.)
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Hanzi He
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.Z.); (Z.Y.); (Y.Y.); (S.Y.)
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
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Yang S, Chen N, Qi J, Salam A, Khan AR, Azhar W, Yang C, Xu N, Wu J, Liu Y, Liu B, Gan Y. OsUGE2 Regulates Plant Growth through Affecting ROS Homeostasis and Iron Level in Rice. RICE (NEW YORK, N.Y.) 2024; 17:6. [PMID: 38212485 PMCID: PMC10784444 DOI: 10.1186/s12284-024-00685-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 01/04/2024] [Indexed: 01/13/2024]
Abstract
BACKGROUND The growth and development of rice (Oryza sativa L.) are affected by multiple factors, such as ROS homeostasis and utilization of iron. Here, we demonstrate that OsUGE2, a gene encoding a UDP-glucose 4-epimerase, controls growth and development by regulating reactive oxygen species (ROS) and iron (Fe) level in rice. Knockout of this gene resulted in impaired growth, such as dwarf phenotype, weakened root growth and pale yellow leaves. Biochemical analysis showed that loss of function of OsUGE2 significantly altered the proportion and content of UDP-Glucose (UDP-Glc) and UDP-Galactose (UDP-Gal). Cellular observation indicates that the impaired growth may result from decreased cell length. More importantly, RNA-sequencing analysis showed that knockout of OsUGE2 significantly influenced the expression of genes related to oxidoreductase process and iron ion homeostasis. Consistently, the content of ROS and Fe are significantly decreased in OsUGE2 knockout mutant. Furthermore, knockout mutants of OsUGE2 are insensitive to both Fe deficiency and hydrogen peroxide (H2O2) treatment, which further confirmed that OsUGE2 control rice growth possibly through Fe and H2O2 signal. Collectively, these results reveal a new pathway that OsUGE2 could affect growth and development via influencing ROS homeostasis and Fe level in rice.
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Affiliation(s)
- Shuaiqi Yang
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Nana Chen
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Jiaxuan Qi
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Abdul Salam
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Ali Raza Khan
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Wardah Azhar
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Chunyan Yang
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Nuo Xu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Junyu Wu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China
| | - Yihua Liu
- College of Agriculture and Forestry Sciences, Linyi University, Linyi, 276000, Shandong, China
| | - Bohan Liu
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
| | - Yinbo Gan
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310000, China.
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10
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Mao X, Zheng X, Sun B, Jiang L, Zhang J, Lyu S, Yu H, Chen P, Chen W, Fan Z, Li C, Liu Q. MKK3 Cascade Regulates Seed Dormancy Through a Negative Feedback Loop Modulating ABA Signal in Rice. RICE (NEW YORK, N.Y.) 2024; 17:2. [PMID: 38170405 PMCID: PMC10764673 DOI: 10.1186/s12284-023-00679-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 12/19/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND With the increasing frequency of climatic anomalies, high temperatures and long-term rain often occur during the rice-harvesting period, especially for early rice crops in tropical and subtropical regions. Seed dormancy directly affects the resistance to pre-harvest sprouting (PHS). Therefore, in order to increase rice production, it is critical to enhance seed dormancy and avoid yield losses to PHS. The elucidation and utilization of the seed dormancy regulation mechanism is of great significance to rice production. Preliminary results indicated that the OsMKKK62-OsMKK3-OsMPK7/14 module might regulate ABA sensitivity and then control seed dormancy. The detailed mechanism is still unclear. RESULTS The overexpression of OsMKK3 resulted in serious PHS. The expression levels of OsMKK3 and OsMPK7 were upregulated by ABA and GA at germination stage. OsMKK3 and OsMPK7 are both located in the nucleus and cytoplasm. The dormancy level of double knockout mutant mkk3/mft2 was lower than that of mkk3, indicating that OsMFT2 functions in the downstream of MKK3 cascade in regulating rice seeds germination. Biochemical results showed that OsMPK7 interacted with multiple core ABA signaling components according to yeast two-hybrid screening and luciferase complementation experiments, suggesting that MKK3 cascade regulates ABA signaling by modulating the core ABA signaling components. Moreover, the ABA response and ABA responsive genes of mpk7/14 were significantly higher than those of wild-type ZH11 when subjected to ABA treatment. CONCLUSION MKK3 cascade mediates the negative feedback loop of ABA signal through the interaction between OsMPK7 and core ABA signaling components in rice.
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Affiliation(s)
- Xingxue Mao
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Xiaoyu Zheng
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Bingrui Sun
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Liqun Jiang
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Jing Zhang
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Shuwei Lyu
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Hang Yu
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Pingli Chen
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Wenfeng Chen
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Zhilan Fan
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China
| | - Chen Li
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China.
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China.
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China.
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China.
| | - Qing Liu
- Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China.
- Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China (Co-Construction By Ministry and Province), Ministry of Agriculture and Rural Affairs, Guangzhou, 510640, China.
- Guangdong Key Laboratory of New Technology in Rice Breeding, Guangzhou, 510640, China.
- Guangdong Rice Engineering Laboratory, Guangzhou, 510640, China.
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11
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Yi K, Yue J, Yang S, Jiang Y, Hong L, Zeng H, Wei K, Mao P, Sun Y, Dou L, Li M. Germination of aged oat seeds associated with changes in antioxidant enzyme activity and storage compounds mobilization. PHYSIOLOGIA PLANTARUM 2023; 175:e14020. [PMID: 37882312 DOI: 10.1111/ppl.14020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 08/26/2023] [Accepted: 08/29/2023] [Indexed: 10/27/2023]
Abstract
Germination of aged seeds may be associated with specific metabolic changes. The objective of this study was to examine physiological and metabolic alterations before and after germination of control and aged oat (Avena sativa) seeds. The activity of antioxidant enzymes and the level of storage compounds were measured in the embryo and endosperm at 0, 4, 16, and 32 h of imbibition for control seeds and 0, 4, 16, 32, and 60 h of imbibition for medium vigor seeds after artificially accelerated aging; metabolomic changes were determined in embryos at 16 and 32 h of seed imbibition. In aged oat seeds, superoxide dismutase activity and catalase activity increased in the late imbibition stage. The content of soluble sugars decreased significantly in the later stages of imbibition, while the content of proteins increased in 32 h of seed imbibition eventually producing mannitol and proline. The mobilization of fat in deteriorated seeds was mainly through the sphingolipid metabolic pathway generated by cell growth-promoting dihydrosphingosine-1-phosphate. Ascorbic acid, avenanthramide and proline levels increased significantly at 60 h of imbibition, playing an important role in the germination of aged oat seeds.
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Affiliation(s)
- Kun Yi
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Jiaming Yue
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Shuangfeng Yang
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Yiwei Jiang
- Department of Agronomy, Purdue University, West Lafayette, Indiana, USA
| | - Liu Hong
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Hanguo Zeng
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Kai Wei
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Peisheng Mao
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Yan Sun
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Liru Dou
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Manli Li
- Forage Seed Laboratory, College of Grassland Science and Technology, China Agricultural University, Beijing, China
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12
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Luo Y, Zhang Y, Le J, Li Q, Mou J, Deng S, Li J, Wang R, Deng Z, Liu J. Full-Length Transcriptome Sequencing Reveals the Molecular Mechanism of Metasequoia glyptostroboides Seed Responding to Aging. Antioxidants (Basel) 2023; 12:1353. [PMID: 37507893 PMCID: PMC10376015 DOI: 10.3390/antiox12071353] [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: 05/03/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
Metasequoia glyptostroboides, Hu and W. C. Cheng, as the only surviving relict species of the Taxodiaceae Metasequoia genus, is a critically endangered and protected species in China. There is a risk of extinction due to the low vigor of M. glyptostroboides seeds, and the physiological mechanism of seed aging in M. glyptostroboides is not yet clear. In order to investigate the physiological and molecular mechanisms underlying the aging process of M. glyptostroboides seeds, we analyzed the antioxidant system and transcriptome at 0, 2, 4, 6, and 8 days after artificial accelerated aging treatment at 40 °C and 100% relative humidity. It was found that the germination percentage of fresh dried M. glyptostroboides seeds was 54 ± 5.29%, and significantly declined to 9.33 ± 1.88% after 6 days of aging, and then gradually decreased until the seed died on day 8. Superoxide dismutase (SOD) activity, ascorbic acid (AsA), glutathione (GSH) content and superoxide anion (O2·-) content and production rate significantly decreased, while malondialdehyde (MDA) and hydrogen peroxide (H2O2) content and glutathione peroxidase (GPX) and catalase (CAT) activity gradually increased during the aging process. A total of 42,189 unigenes were identified in the whole transcriptome, and 40,446 (95.86%) unigenes were annotated in at least one protein database. A total of 15,376 differentially expressed genes (DEGs) were obtained; KEGG enrichment analysis results revealed that seed aging may be mainly involved in the protein-processing pathways in endoplasmic reticulum, oxidative phosphorylation, and ascorbate and aldarate metabolism. Weighted gene co-expression network analysis (WGCNA) revealed that the dark magenta, orange, and medium purple modules were highly correlated with physiological indicators such as SOD, CAT, and GSH and further identified 40 hub genes such as Rboh, ACO, HSF, and CML as playing important roles in the antioxidant network of M. glyptostroboides seeds. These findings provide a broader perspective for studying the regulatory mechanism of seed aging and a large number of potential target genes for the breeding of other endangered gymnosperms.
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Affiliation(s)
- Yongjian Luo
- Hubei Key Laboratory of Biologic Resources Protection and Utilization, Hubei Minzu University, Enshi 445000, China
- Guangdong Key Laboratory for Crop Germplasm Resources Preservation and Utilization, Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Research Center for Germplasm Engineering of Characteristic Plant Resources in Enshi Prefecture, Hubei Minzu University, Enshi 445000, China
- The Plant Germplasm Resources Laboratory, School of Forestry and Horticulture, Hubei Minzu University, Enshi 445000, China
| | - Yixin Zhang
- Guangdong Key Laboratory for Crop Germplasm Resources Preservation and Utilization, Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Jingyu Le
- Hubei Key Laboratory of Biologic Resources Protection and Utilization, Hubei Minzu University, Enshi 445000, China
- Research Center for Germplasm Engineering of Characteristic Plant Resources in Enshi Prefecture, Hubei Minzu University, Enshi 445000, China
- The Plant Germplasm Resources Laboratory, School of Forestry and Horticulture, Hubei Minzu University, Enshi 445000, China
| | - Qing Li
- Guangdong Key Laboratory for Crop Germplasm Resources Preservation and Utilization, Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Jiaolin Mou
- Hubei Key Laboratory of Biologic Resources Protection and Utilization, Hubei Minzu University, Enshi 445000, China
- Research Center for Germplasm Engineering of Characteristic Plant Resources in Enshi Prefecture, Hubei Minzu University, Enshi 445000, China
- The Plant Germplasm Resources Laboratory, School of Forestry and Horticulture, Hubei Minzu University, Enshi 445000, China
| | - Shiming Deng
- Hubei Key Laboratory of Biologic Resources Protection and Utilization, Hubei Minzu University, Enshi 445000, China
- Research Center for Germplasm Engineering of Characteristic Plant Resources in Enshi Prefecture, Hubei Minzu University, Enshi 445000, China
- The Plant Germplasm Resources Laboratory, School of Forestry and Horticulture, Hubei Minzu University, Enshi 445000, China
| | - Jitao Li
- Hubei Key Laboratory of Biologic Resources Protection and Utilization, Hubei Minzu University, Enshi 445000, China
- Research Center for Germplasm Engineering of Characteristic Plant Resources in Enshi Prefecture, Hubei Minzu University, Enshi 445000, China
- The Plant Germplasm Resources Laboratory, School of Forestry and Horticulture, Hubei Minzu University, Enshi 445000, China
| | - Ru Wang
- Hubei Key Laboratory of Biologic Resources Protection and Utilization, Hubei Minzu University, Enshi 445000, China
- Research Center for Germplasm Engineering of Characteristic Plant Resources in Enshi Prefecture, Hubei Minzu University, Enshi 445000, China
- The Plant Germplasm Resources Laboratory, School of Forestry and Horticulture, Hubei Minzu University, Enshi 445000, China
| | - Zhijun Deng
- Hubei Key Laboratory of Biologic Resources Protection and Utilization, Hubei Minzu University, Enshi 445000, China
- Research Center for Germplasm Engineering of Characteristic Plant Resources in Enshi Prefecture, Hubei Minzu University, Enshi 445000, China
- The Plant Germplasm Resources Laboratory, School of Forestry and Horticulture, Hubei Minzu University, Enshi 445000, China
| | - Jun Liu
- Guangdong Key Laboratory for Crop Germplasm Resources Preservation and Utilization, Agro-Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
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Pagano A, Kunz L, Dittmann A, Araújo SDS, Macovei A, Shridhar Gaonkar S, Sincinelli F, Wazeer H, Balestrazzi A. Changes in Medicago truncatula seed proteome along the rehydration-dehydration cycle highlight new players in the genotoxic stress response. FRONTIERS IN PLANT SCIENCE 2023; 14:1188546. [PMID: 37409306 PMCID: PMC10319343 DOI: 10.3389/fpls.2023.1188546] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/24/2023] [Indexed: 07/07/2023]
Abstract
Introduction Several molecular aspects underlying the seed response to priming and the resulting vigor profile are still poorly understood. Mechanisms involved in genome maintenance deserve attention since the balance between stimulation of germination and DNA damage accumulation versus active repair is a key determinant for designing successful seed priming protocols. Methods Changes in the Medicago truncatula seed proteome were investigated in this study, using discovery mass spectrometry and label-free quantification, along the rehydration-dehydration cycle of a standard vigorization treatment (hydropriming plus dry-back), and during post-priming imbibition. Resuts and discussion From 2056 to 2190 proteins were detected in each pairwise comparison, among which six were differentially accumulated and 36 were detected only in one condition. The following proteins were selected for further investigation: MtDRP2B (DYNAMIN-RELATED PROTEIN), MtTRXm4 (THIOREDOXIN m4), and MtASPG1 (ASPARTIC PROTEASE IN GUARD CELL 1) showing changes in seeds under dehydration stress; MtITPA (INOSINE TRIPHOSPHATE PYROPHOSPHORYLASE), MtABA2 (ABSCISIC ACID DEFICIENT 2), MtRS2Z32 (SERINE/ARGININE-RICH SPLICING FACTOR RS2Z32), and MtAQR (RNA HELICASE AQUARIUS) that were differentially regulated during post-priming imbibition. Changes in the corresponding transcript levels were assessed by qRT-PCR. In animal cells, ITPA hydrolyses 2'-deoxyinosine triphosphate and other inosine nucleotides, preventing genotoxic damage. A proof of concept was performed by imbibing primed and control M. truncatula seeds in presence/absence of 20 mM 2'-deoxyinosine (dI). Results from comet assay highlighted the ability of primed seeds to cope with dI-induced genotoxic damage. The seed repair response was assessed by monitoring the expression profiles of MtAAG (ALKYL-ADENINE DNA GLYCOSILASE) and MtEndoV (ENDONUCLEASE V) genes that participate in the repair of the mismatched I:T pair in BER (base excision repair) and AER (alternative excision repair) pathways, respectively.
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Affiliation(s)
- Andrea Pagano
- Department of Biology and Biotechnology ‘L. Spallanzani’, University of Pavia, Pavia, Italy
| | - Laura Kunz
- Functional Genomics Center Zurich (FGCZ), University of Zurich/Eidgenossische Technische Hochschule (ETH) Zurich, Zurich, Switzerland
| | - Antje Dittmann
- Functional Genomics Center Zurich (FGCZ), University of Zurich/Eidgenossische Technische Hochschule (ETH) Zurich, Zurich, Switzerland
| | - Susana De Sousa Araújo
- Association BLC3 - Campus of Technology and Innovation, Centre BIO R&D Unit | North Delegation, Macedo de Cavaleiros, Portugal
| | - Anca Macovei
- Department of Biology and Biotechnology ‘L. Spallanzani’, University of Pavia, Pavia, Italy
- National Biodiversity Future Center (NBFC), Palermo, Italy
| | | | - Federico Sincinelli
- Department of Biology and Biotechnology ‘L. Spallanzani’, University of Pavia, Pavia, Italy
| | - Hisham Wazeer
- Department of Biology and Biotechnology ‘L. Spallanzani’, University of Pavia, Pavia, Italy
| | - Alma Balestrazzi
- Department of Biology and Biotechnology ‘L. Spallanzani’, University of Pavia, Pavia, Italy
- National Biodiversity Future Center (NBFC), Palermo, Italy
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Transcriptome Analyses Reveal the Role of Light in Releasing the Morphological Dormancy of Celery Seed by Integrating Plant Hormones, Sugar Metabolism and Endosperm Weakening. Int J Mol Sci 2022; 23:ijms231710140. [PMID: 36077537 PMCID: PMC9456436 DOI: 10.3390/ijms231710140] [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: 08/03/2022] [Revised: 08/20/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
Celery seed is known to be difficult to germinate due to its morphological dormancy. Light is the key signal to release morphological dormancy and promote seed germination. However, this mechanism has rarely been studied. We performed physiological, transcriptome analyses on celery seed exposed to light and dark to decipher the mechanism by which light promotes germination of celery seed. The results showed that light significantly enhanced the expression of gibberellin synthesis genes and abscisic acid degradation genes and inhibited the expression of abscisic acid synthesis genes and gibberellin degradation genes. Moreover, gibberellin synthesis inhibitor could completely inhibit the germination capacity of celery seed, indicating that gibberellin is indispensable in the process of celery seed germination. Compared with dark, light also increased the activity of α-amylase and β-amylase and the expression of related coding genes and promoted the degradation of starch and the increase of soluble sugar content, suggesting that light enhanced the sugar metabolism of celery seed. In addition, transcriptome analysis revealed that many genes related to endosperm weakening (cell wall remodeling enzymes, extension proteins) were up-regulated under light. It was also found that light promoted the accumulation of hydrogen peroxide in the radicle, which promoted the endosperm weakening process of celery seed. Our results thus indicated that light signal may promote the release of morphological dormancy through the simultaneous action of multiple factors.
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15
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Gong D, He F, Liu J, Zhang C, Wang Y, Tian S, Sun C, Zhang X. Understanding of Hormonal Regulation in Rice Seed Germination. LIFE (BASEL, SWITZERLAND) 2022; 12:life12071021. [PMID: 35888110 PMCID: PMC9324290 DOI: 10.3390/life12071021] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/01/2022] [Accepted: 07/02/2022] [Indexed: 01/06/2023]
Abstract
Seed germination is a critical stage during the life cycle of plants. It is well known that germination is regulated by a series of internal and external factors, especially plant hormones. In Arabidopsis, many germination-related factors have been identified, while in rice, the important crop and monocot model species and the further molecular mechanisms and regulatory networks controlling germination still need to be elucidated. Hormonal signals, especially those of abscisic acid (ABA) and gibberellin (GA), play a dominant role in determining whether a seed germinates or not. The balance between the content and sensitivity of these two hormones is the key to the regulation of germination. In this review, we present the foundational knowledge of ABA and GA pathways obtained from germination research in Arabidopsis. Then, we highlight the current advances in the identification of the regulatory genes involved in ABA- or GA-mediated germination in rice. Furthermore, other plant hormones regulate seed germination, most likely by participating in the ABA or GA pathways. Finally, the results from some regulatory layers, including transcription factors, post-transcriptional regulations, and reactive oxygen species, are also discussed. This review aims to summarize our current understanding of the complex molecular networks involving the key roles of plant hormones in regulating the seed germination of rice.
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Affiliation(s)
- Diankai Gong
- Liaoning Rice Research Institute, Shenyang 110115, China; (D.G.); (C.Z.); (Y.W.); (S.T.); (C.S.)
| | - Fei He
- Tianjin Key Laboratory of Crop Genetics and Breeding, Tianjin Crop Research Institute, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China; (F.H.); (J.L.)
| | - Jingyan Liu
- Tianjin Key Laboratory of Crop Genetics and Breeding, Tianjin Crop Research Institute, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China; (F.H.); (J.L.)
| | - Cheng Zhang
- Liaoning Rice Research Institute, Shenyang 110115, China; (D.G.); (C.Z.); (Y.W.); (S.T.); (C.S.)
| | - Yanrong Wang
- Liaoning Rice Research Institute, Shenyang 110115, China; (D.G.); (C.Z.); (Y.W.); (S.T.); (C.S.)
| | - Shujun Tian
- Liaoning Rice Research Institute, Shenyang 110115, China; (D.G.); (C.Z.); (Y.W.); (S.T.); (C.S.)
| | - Chi Sun
- Liaoning Rice Research Institute, Shenyang 110115, China; (D.G.); (C.Z.); (Y.W.); (S.T.); (C.S.)
| | - Xue Zhang
- Liaoning Rice Research Institute, Shenyang 110115, China; (D.G.); (C.Z.); (Y.W.); (S.T.); (C.S.)
- Correspondence: ; Tel.: +86-150-4020-6835
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Liu F, Li N, Yu Y, Chen W, Yu S, He H. Insights into the Regulation of Rice Seed Storability by Seed Tissue-Specific Transcriptomic and Metabolic Profiling. PLANTS 2022; 11:plants11121570. [PMID: 35736721 PMCID: PMC9231264 DOI: 10.3390/plants11121570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/11/2022] [Accepted: 06/12/2022] [Indexed: 11/26/2022]
Abstract
Non-dormant seeds are continuously aging and deteriorating during storage, leading to declining seed vigor, which is a challenge for the rice seed industry. Improving the storability of seeds is of great significance to ensure the quality of rice and national food security. Through a set of chromosome segment substitution lines population constructed using japonica rice NIP as donor parent and indica rice ZS97 as recurrent parent, we performed seed storability QTL analysis and selected four non-storable NILs to further investigate the storability regulatory mechanisms underlying it. The seeds were divided into four tissues, which were the embryo, endosperm, aleurone layer, and hull, and tissue-specific transcriptome and metabolome analyses were performed on them. By exploring the common differentially expressed genes and differentially accumulated metabolites, as well as the KEGG pathway of the four non-storable NILs, we revealed that the phenylpropanoid biosynthesis pathway and diterpenoid biosynthesis pathway played a central role in regulating seed storability. Integrated analysis pinpointed 12 candidate genes that may take part in seed storability. The comprehensive analysis disclosed the divergent and synergistic effect of different seed tissues in the regulation of rice storability.
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Affiliation(s)
- Fangzhou Liu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (F.L.); (N.L.); (Y.Y.); (W.C.); (S.Y.)
| | - Nannan Li
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (F.L.); (N.L.); (Y.Y.); (W.C.); (S.Y.)
- Weizhai Town Agricultural Comprehensive Service Station, Fuyang 236418, China
| | - Yuye Yu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (F.L.); (N.L.); (Y.Y.); (W.C.); (S.Y.)
- Glbizzia Bioinformatics Institute, Beijing 102629, China
| | - Wei Chen
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (F.L.); (N.L.); (Y.Y.); (W.C.); (S.Y.)
| | - Sibin Yu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (F.L.); (N.L.); (Y.Y.); (W.C.); (S.Y.)
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Hanzi He
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (F.L.); (N.L.); (Y.Y.); (W.C.); (S.Y.)
- Correspondence:
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Zhou S, Huang K, Zhou Y, Hu Y, Xiao Y, Chen T, Yin M, Liu Y, Xu M, Jiang X. Degradome sequencing reveals an integrative miRNA-mediated gene interaction network regulating rice seed vigor. BMC PLANT BIOLOGY 2022; 22:269. [PMID: 35650544 PMCID: PMC9158300 DOI: 10.1186/s12870-022-03645-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 05/11/2022] [Indexed: 05/14/2023]
Abstract
BACKGROUND It is well known that seed vigor is essential for agricultural production and rice (Oryza sativa L.) is one of the most important crops in the world. Though we previously reported that miR164c regulates rice seed vigor, but whether and how other miRNAs cooperate with miR164c to regulate seed vigor is still unknown. RESULTS Based on degradome data of six RNA samples isolated from seeds of the wild-type (WT) indica rice cultivar 'Kasalath' as well as two modified lines in 'Kasalath' background (miR164c-silenced line [MIM164c] and miR164c overexpression line [OE164c]), which were subjected to either no aging treatment or an 8-day artificial aging treatment, 1247 different target transcripts potentially cleaved by 421 miRNAs were identified. The miRNA target genes were functionally annotated via GO and KEGG enrichment analyses. By STRING database assay, a miRNA-mediated gene interaction network regulating seed vigor in rice was revealed, which comprised at least four interconnected pathways: the miR5075-mediated oxidoreductase related pathway, the plant hormone related pathway, the miR164e related pathway, and the previously reported RPS27AA related pathway. Knockout and overexpression of the target gene Os02g0817500 of miR5075 decreased and enhanced seed vigor, respectively. By Y2H assay, the proteins encoded by five seed vigor-related genes, Os08g0295100, Os07g0633100, REFA1, OsPER1 and OsGAPC3, were identified to interact with Os02g0817500. CONCLUSIONS miRNAs cooperate to regulate seed vigor in rice via an integrative gene interaction network comprising miRNA target genes and other functional genes. The result provided a basis for fully understanding the molecular mechanisms of seed vigor regulation.
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Affiliation(s)
- Shiqi Zhou
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
| | - Kerui Huang
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, Changsha, 410081, China
- College of Life and Environmental Sciences, Hunan University of Arts and Science, Changde, 415000, China
| | - Yan Zhou
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
| | - Yingqian Hu
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
| | - Yuchao Xiao
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
| | - Ting Chen
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
| | - Mengqi Yin
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
| | - Yan Liu
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
| | - Mengliang Xu
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, Changsha, 410081, China
| | - Xiaocheng Jiang
- College of Life Sciences, Hunan Normal University, Changsha, 410081, China.
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, Changsha, 410081, China.
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Zhou H, Wang Y, Zhang Y, Xiao Y, Liu X, Deng H, Lu X, Tang W, Zhang G. Comparative Analysis of Heat-Tolerant and Heat-Susceptible Rice Highlights the Role of OsNCED1 Gene in Heat Stress Tolerance. PLANTS 2022; 11:plants11081062. [PMID: 35448790 PMCID: PMC9026844 DOI: 10.3390/plants11081062] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/27/2022] [Accepted: 03/28/2022] [Indexed: 11/16/2022]
Abstract
To elucidate the mechanism underlying the response of rice to heat stress (HS), the transcriptome profile of panicles was comparatively analyzed between the heat-tolerant line 252 (HTL252) and heat-susceptible line 082 (HSL082), two rice recombinant inbred lines (RILs). Our differentially expressed gene (DEG) analysis revealed that the DEGs are mainly associated with protein binding, catalysis, stress response, and cellular process. The MapMan analysis demonstrated that the heat-responsive (HR) genes for heat shock proteins, transcription factors, development, and phytohormones are specifically induced in HTL252 under HS. Based on the DEG analysis, the key gene OsNCED1 (Os02g0704000), which was induced under HS, was selected for further functional validation. Moreover, 9-cis-epoxycarotenoid dioxygenase (NCED) is a key rate-limiting enzyme in the ABA biosynthetic pathway. Overexpression of OsNCED1 improved the HS tolerance of rice at the heading and flowering stage. OsNCED1-overexpression plants exhibited significant increases in pollen viability, seed setting rate, superoxide dismutase (SOD) and peroxidase (POD) activities, while significantly lower electrolyte leakage and malondialdehyde (MDA) content relative to the wild type (WT). These results suggested that OsNCED1 overexpression can improve the heat tolerance of rice by enhancing the antioxidant capacity. Overall, this study lays a foundation for revealing the molecular regulatory mechanism underlying the response of rice to prolonged HS.
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Affiliation(s)
- Huang Zhou
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
| | - Yingfeng Wang
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
| | - Yijin Zhang
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
| | - Yunhua Xiao
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
| | - Xiong Liu
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
| | - Huabing Deng
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
| | - Xuedan Lu
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
| | - Wenbang Tang
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Centre, Changsha 410125, China
- Correspondence: (W.T.); (G.Z.)
| | - Guilian Zhang
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China; (H.Z.); (Y.W.); (Y.Z.); (Y.X.); (X.L.); (H.D.); (X.L.)
- Hunan Provincial Key Laboratory of Rice and Rapeseed Breeding for Disease Resistance, Hunan Agricultural University, Changsha 410128, China
- Correspondence: (W.T.); (G.Z.)
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