气候变化领域集成服务门户(CCPortal): DNA hypomethylation in tetraploid rice potentiates stress-responsive gene expression for salt tolerance

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DOI	10.1073/PNAS.2023981118
	DNA hypomethylation in tetraploid rice potentiates stress-responsive gene expression for salt tolerance
	Wang L.; Cao S.; Wang P.; Lu K.; Song Q.; Zhao F.-J.; Chen Z.J.
发表日期	2021
ISSN	00278424
卷号	118 期号:13
英文摘要	Polyploidy is a prominent feature for genome evolution in many animals and all flowering plants. Plant polyploids often show enhanced fitness in diverse and extreme environments, but the molecular basis for this remains elusive. Soil salinity presents challenges for many plants including agricultural crops. Here we report that salt tolerance is enhanced in tetraploid rice through lower sodium uptake and correlates with epigenetic regulation of jasmonic acid (JA)-related genes. Polyploidy induces DNA hypomethylation and potentiates genomic loci coexistent with many stress-responsive genes, which are generally associated with proximal transposable elements (TEs). Under salt stress, the stress-responsive genes including those in the JA pathway are more rapidly induced and expressed at higher levels in tetraploid than in diploid rice, which is concurrent with increased jasmonoyl isoleucine (JA-Ile) content and JA signaling to confer stress tolerance. After stress, elevated expression of stress-responsive genes in tetraploid rice can induce hypermethylation and suppression of the TEs adjacent to stress-responsive genes. These induced responses are reproducible in a recurring round of salt stress and shared between two japonica tetraploid rice lines. The data collectively suggest a feedback relationship between polyploidy-induced hypomethylation in rapid and strong stress response and stress-induced hypermethylation to repress proximal TEs and/or TE-associated stress-responsive genes. This feedback regulation may provide a molecular basis for selection to enhance adaptation of polyploid plants and crops during evolution and domestication. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	DNA methylation; Gene expression; Polyploidy; Salt tolerance; Transposons
语种	英语
scopus关键词	Article; controlled study; correlational study; diploidy; DNA methylation; gene expression; gene locus; genetic association; genetic regulation; information processing; nonhuman; plant stress; polyploidy; priority journal; rice; salt tolerance; signal transduction; sodium transport; tetraploidy; transposon
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180042
作者单位	State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China; Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	Wang L.,Cao S.,Wang P.,et al. DNA hypomethylation in tetraploid rice potentiates stress-responsive gene expression for salt tolerance[J],2021,118(13).
APA	Wang L..,Cao S..,Wang P..,Lu K..,Song Q..,...&Chen Z.J..(2021).DNA hypomethylation in tetraploid rice potentiates stress-responsive gene expression for salt tolerance.Proceedings of the National Academy of Sciences of the United States of America,118(13).
MLA	Wang L.,et al."DNA hypomethylation in tetraploid rice potentiates stress-responsive gene expression for salt tolerance".Proceedings of the National Academy of Sciences of the United States of America 118.13(2021).