Leaf Morphology Genes SRL1 and RENL1 Co-Regulate Cellulose Synthesis and Affect Rice Drought Tolerance

文献类型： 外文期刊

第一作者： Liu, Dan

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;Qian, Qian;Zhang, Guangheng;Liu, Dan;Wang, Zi'an;Liu, Yiting;Hu, Songping;Zhao, Huibo;Zhu, Li;Qian, Qian;Zhang, Guangheng

作者机构：

关键词： cellulose; cell wall; drought tolerance; leaf morphology; rice

期刊名称：RICE SCIENCE （ 影响因子：4.8； 五年影响因子：5.5 ）

ISSN： 1672-6308

年卷期： 2024 年 31 卷 1 期

页码：

收录情况： SCI

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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