数字农科院2.0

Pale Green Mutant Analyses Reveal The Importance Of Csglks In Chloroplast Developmental Regulation And Their Effects On Flavonoid Biosynthesis In Tea Plant

文献类型： 外文期刊

作者： Hao, XY; Zhang, WF; Liu, Y; Zhang, HJ; Ren, HZ; Chen, Y; Wang, L; Zeng, JM; Yang, YJ; Wang, XC

作者机构：

关键词： Leaf Color Variation; Mutant; Molecular Mechanism; Photosynthesis; Secondary Metabolism

期刊名称： PLANT PHYSIOLOGY AND BIOCHEMISTRY

ISSN： 0981-9428

年卷期： 2020 年 146 卷

页码：

收录情况： JCR（2021版）

摘要： Tea cultivars with leaf color variation have attracted increasing attention in tea production and research due to their unusual appearances and appealing flavors. However, the molecular mechanism underlying this variation is little known due to the unavailability of genetic transformation and a highly complex genome. Here, a natural tea plant mutant producing pale green branches (pgb) was discovered and characterized. Ultrastructural and biochemical analyses showed that the leaves of the pgb mutant had defective chloroplast structure and significantly lower pigment content than the normal control. Comprehensive expression detection of chloroplast-development-related genes further indicated that a significant downregulation of CsGLKs in the pgb mutant likely caused the chloroplast defect. Transcriptome analyses and polyphenolic compound determination highlighted a tight correlation between photosynthesis and secondary metabolite biosynthesis in tea plant. These results provide useful information illuminating the mechanism of chloroplast development and leaf color variation in tea plant.

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