数字农科院2.0

OsPLS4Is Involved in Cuticular Wax Biosynthesis and Affects Leaf Senescence in Rice

文献类型： 外文期刊

作者： Zhou Dahu ; Ting Li +; Yaolong Yang ; Ziyang Qu ; Linjuan Ouyang ; Zhishu Jiang ; Xiaoli Lin ; Changlan Zhu ; Liyuan Peng ; Junru Fu ; Xiaosong Peng ; Jianmin Bian ; Wenbang Tang *; Jie Xu *; Haohua He *

作者机构：

关键词： Chloroplast; Leaf Senescence; Cuticular Wax; Fatty Acid Synthesis; Chilling Stress; Oryza Sativa

期刊名称： FRONTIERS IN PLANT SCIENCE

ISSN： 1664-462X

年卷期： 2020 年 11 卷

页码：

收录情况： JCR（2021版）

摘要： Leaf senescence is one of the most common factors that affects the growth and yield of rice. Although numerous genes affecting leaf senescence have been identified, few involved in cuticular wax synthesis have been described for rice premature leaf senescence. Here, we cloned and characterizedPremature Leaf Senescence 4 (PLS4)in rice (Oryza sativa), which encodes a putative 3-oxoacyl-reductase in the fatty acid biosynthetic pathway. Subcellular localization of OsPLS4 was observed in the chloroplast. A single nucleotide substitution inOsPLS4reduced leaf cuticular wax, and the expression levels of most wax biosynthesis-associated genes were downregulated. TEM showed chloroplast development were defective in thepls4mutant. Further investigation revealed that the chlorophyll (Chl) content was reduced in thepls4mutant compared with the WT and that the photosynthesis rate was lower, which caused ROS dramatic accumulation at the heading stage. These results confirmed premature leaf senescence inpls4plants. Cold treatment indicated that the mutant was more sensitive than the WT was to cold stress. Together, all the above results indicate that theOsPLS4mutation affects cuticular wax biosynthesis and chloroplast development in rice, causing reduced cuticular wax and premature leaf senescence.

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