The Rice Pentatricopeptide Repeat Gene TCD10 is Needed for Chloroplast Development under Cold Stress

文献类型： 外文期刊

第一作者： Wu, Lanlan

作者： Wu, Lanlan;Wu, Jun;Liu, Yanxia;Gong, Xiaodi;Lin, Dongzhi;Dong, Yanjun;Gong, Xiaodi;Xu, Jianlong

作者机构：

关键词： Albino phenotype;Chloroplast development;Cold stress;PPR protein;Rice

期刊名称：RICE （ 影响因子：4.783； 五年影响因子：5.23 ）

ISSN： 1939-8425

年卷期： 2016 年 9 卷

页码：

收录情况： SCI

摘要： Background: Chloroplast plays a vital role in plant development and growth. The pentatricopeptide repeat (PPR) gene family is one of the largest gene families in plants. In addition, cold stress affects a broad spectrum of cellular components, e.g. chloroplast, and metabolism in plants. However, the regulatory mechanism for rice PPR genes on chloroplast development still remains elusive under cold stress. Result: In this paper, we characterized a new rice PPR gene mutant tcd10 (thermo-sensitive chlorophyll-deficient mutant 10) that exhibits the albino phenotype, malformed chloroplast and could not survive after the 5-leaf stage when grown at 20 degrees C, but does the normal phenotype at 32 degrees C. Map-based cloning, followed by RNA interference and CRISPR/Cas9 genome editing techniques, revealed that TCD10 encoding a novel PPR protein, mainly localized to the chloroplasts, with 27 PPR motifs, is responsible for the mutant phenotype. In addition, TCD10 is specific expression in tissues. The disruption of TCD10 resulted in an evidently reduced expression of chloroplast-associated genes under cold stress (20 degrees C), whereas they did recovered to normal levels at high temperature (32 degrees C). These results showed an important role of TCD10 for chloroplast development under cold stress. Conclusions: The TCD10 encodes a novel rice PPR protein, mainly located in chloroplasts, which is important for chloroplast development, growth and the maintenance of photosynthetic electron transport and its disorder would lead to an aberrant chloroplast and abnormal expressions in these genes for chloroplast development and photosynthesis in rice under cold stress.

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