PGL, encoding chlorophyllide a oxygenase 1, impacts leaf senescence and indirectly affects grain yield and quality in rice

文献类型： 外文期刊

第一作者： Yang, Yaolong

作者： Yang, Yaolong;Xu, Jie;Huang, Lichao;Leng, Yujia;Dai, Liping;Rao, Yuchun;Chen, Long;Wang, Yuqiong;Tu, Zhengjun;Hu, Jiang;Ren, Deyong;Zhang, Guangheng;Zhu, Li;Guo, Longbiao;Qian, Qian;Zeng, Dali;Yang, Yaolong;Xu, Jie

作者机构：

关键词： Chlorophyll b;chlorophyllide a oxygenase;leaf senescence;pale green leaf;rice

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.992； 五年影响因子：7.86 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Chlorophyll (Chl) b is a ubiquitous accessory pigment in land plants, green algae, and prochlorophytes. This pigment is synthesized from Chl a by chlorophyllide a oxygenase and plays a key role in adaptation to various environments. This study characterizes a rice mutant, pale green leaf (pgl), and isolates the gene PGL by using a map-based cloning approach. PGL, encoding chlorophyllide a oxygenase 1, is mainly expressed in the chlorenchyma and activated in the light-dependent Chl synthesis process. Compared with wild-type plants, pgl exhibits a lower Chl content with a reduced and disorderly thylakoid ultrastructure, which decreases the photosynthesis rate and results in reduced grain yield and quality. In addition, pgl exhibits premature senescence in both natural and dark-induced conditions and more severe Chl degradation and reactive oxygen species accumulation than does the wild-type. Moreover, pgl is sensitive to heat stress.

分类号： Q94

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