Mutation of the gene encoding the PHD-type transcription factor SAB23 confers submergence tolerance in rice
文献类型： 外文期刊
作者： Duan, Ao 1 ; Liu, Rui 1 ; Liu, Changchang 1 ; Wu, Fei 1 ; Su, Hang 1 ; Zhou, Shuangzhen 1 ; Huang, Min 1 ; Tian, Xiaohai 2 ; Jia, Haitao 3 ; Liu, Ya 4 ; Li, Manfei 1 ; Du, Hewei 1 ;
作者机构： 1.Yangtze Univ, Coll Life Sci, Jingzhou 434025, Hubei, Peoples R China
2.Yangzte Univ, Hubei Collaborat Innovat Ctr Grain Crops, Jingzhou 434025, Peoples R China
3.Hubei Acad Agr Sci, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improvem, Wuhan 430064, Hubei, Peoples R China
4.Beijing Acad Agr & Forestry Sci, Maize Res Inst, Beijing 100097, Peoples R China
关键词： GA13ox; GA(4); gibberellin; plant homeodomain; rice (Oryza sativa); submergence tolerance; transcription factor
期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.9； 五年影响因子：8.0 ）
ISSN： 0022-0957
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Submergence is a major constraint on rice production in South and Southeast Asia. In this study, we determined that a gene of the Sub1A-binding protein family, SAB23, encodes a plant homeodomain (PHD)-type transcription factor that has a novel function of negatively regulating submergence tolerance in rice. The T-DNA insertion mutant sab23 displayed reduced plant height, delayed seed maturation, and lower percentage seed set. Importantly, this mutant also exhibited enhanced submergence tolerance. In addition, CRISPR/Cas9 knock out of SAB23 resulted in a significant reduction in the content of the gibberellin GA(4) and a dramatic increase in the content of GA(1) in the plants. SAB23 binds to the promoter of CYTOCHROME P450 714B2 (CYP714B2), which encodes a GA13-oxidase that catalyses the conversion of GA(53) to GA(19). Disruption of SAB23 function led to increased CYP714B2 transcription, and overexpression of CYP714B2 produced phenotypes similar to those of the SAB23-knockout plants. Taken together, our results reveal that SAB23 negatively regulates rice submergence tolerance by modulating CYP714B2 expression, which has significant potential for use in future breeding.
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