数字农科院2.0

The ABA synthesis enzyme allele OsNCED2T promotes dryland adaptation in upland rice

文献类型： 外文期刊

作者： Huang, Liyu;Bao, Yachong;Qin, Shiwen;Ning, Min;Li, Qinyan;Li, Qingmao;Zhang, Shilai;Huang, Guangfu;Zhang, Jing;Wang, Wensheng;Fu, Binying;Hu, Fengyi

作者机构：

关键词： Upland rice;Dryland adaptation;ABA;Root development;Drought tolerance

期刊名称： CROP JOURNAL

ISSN： 2095-5421

年卷期： 2024 年 12 卷 1 期

页码：

收录情况： SCIE（2024版） ; ; CSCD（2023-2024年度） ; ; 科技核心（2024版） ; ; 农林核心（2020版）

摘要： Upland rice shows dryland adaptation in the form of a deeper and denser root system and greater drought resistance than its counterpart, irrigated rice. Our previous study revealed a difference in the frequency of the OsNCED2 gene between upland and irrigated populations. A nonsynonymous mutation (C to T, from irrigated to upland rice) may have led to functional variation fixed by artificial selection, but the exact biological function in dryland adaptation is unclear. In this study, transgenic and association analysis indicated that the domesticated fixed mutation caused functional variation in OsNCED2, increasing ABA levels, root development, and drought tolerance in upland rice under dryland conditions. OsNCED2-overexpressing rice showed increased reactive oxygen species-scavenging abilities and transcription levels of many genes functioning in stress response and development that may regulate root development and drought tolerance. OsNCED2T-NILs showed a denser root system and drought resistance, promoting the yield of rice under dryland conditions. OsNCED2T may confer dryland adaptation in upland rice and may find use in breeding dryland-adapted, water-saving rice. (c) 2023 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NCND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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