Leaf Morphology Genes SRL1 and RENL1 Co-Regulate Cellulose Synthesis and Affect Rice Drought Tolerance
文献类型: 外文期刊
作者: Liu Dan;Zhao Huibo;Wang Zi'an;Xu Jing;Liu Yiting;Wang Jiajia;Chen Minmin;Liu Xiong;Zhang Zhihai;Cen Jiangsu;Zhu Li;Hu Jiang;Ren Deyong;Gao Zhenyu;Dong Guojun;Zhang Qiang;Shen Lan;Li Qing;Qian Qian;Hu Songping;Zhang Guangheng
作者机构:
关键词: cell wall;cellulose;drought tolerance;leaf morphology;rice
期刊名称: Rice Science
ISSN: 1672-6308
年卷期: 2024 年 31 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: The morphological development of rice (Oryza sativa L.) leaves is closely related to plant architecture, physiological activities, and resistance. However, it is unclear whether there is a co-regulatory relationship between the morphological development of leaves and adaptation to drought environment. In this study, a drought-sensitive, roll-enhanced, and narrow-leaf mutant (renl1) was induced from a semi-rolled leaf mutant (srl1) by ethyl methane sulfonate (EMS), which was obtained from Nipponbare (NPB) through EMS. Map-based cloning and functional validation showed that RENL1 encodes a cellulose synthase, allelic to NRL1/OsCLSD4. The RENL1 mutation resulted in reduced vascular bundles, vesicular cells, cellulose, and hemicellulose contents in cell walls, diminishing the water-holding capacity of leaves. In addition, the root system of the renl1 mutant was poorly developed and its ability to scavenge reactive oxygen species (ROS) was decreased, leading to an increase in ROS after drought stress. Meanwhile, genetic results showed that RENL1 and SRL1 synergistically regulated cell wall components. Our results revealed a theoretical basis for further elucidating the molecular regulation mechanism of cellulose on rice drought tolerance, and provided a new genetic resource for enhancing the synergistic regulation network of plant type and stress resistance, thereby realizing simultaneous improvement of multiple traits in rice.
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