A naturally occurring conditional albino mutant in rice caused by defects in the plastid-localized OsABCI8 transporter
文献类型: 外文期刊
第一作者: Zeng, Xiuyu
作者: Zeng, Xiuyu;Tang, Ran;Guo, Herong;Ke, Shanwen;Xu, Zhenjiang;Xie, Xin-Ming;Zhang, Xiang-Qian;Teng, Bin;Hung, Yu-Hung;Hsieh, Tzung-Fu;Hung, Yu-Hung;Hsieh, Tzung-Fu
作者机构:
关键词: Rice;ABC transporter;Iron transport;Chloroplast development
期刊名称:PLANT MOLECULAR BIOLOGY ( 影响因子:4.076; 五年影响因子:4.89 )
ISSN:
年卷期:
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收录情况: SCI
摘要: A wide range of molecules are transported across membranes by the ATP binding cassette (ABC) transporters. Plants possess a collection of ABC proteins bearing similarities to the components of prokaryotic multi subunit ABC transporters, designed as ABC group I. However the functions of most of them are not well understood. Here, we characterized a naturally occurring rice mutant that exhibited albino phenotype under continuous rainy days in the field, but gradually recovered to normal green after the rainy season. Molecular and genetic analyses revealed that the phenotypes were caused by a mutation in the OsABCI8 that encoded a member of the ABCI family. Subcellular localization demonstrated that OsABCI8 is a chloroplast ABC transporter. Expression of OsABCI8 is significantly enhanced in rainy days compared to sunny days. Besides defects in chloroplast development and chlorophyll biosynthesis, the mutant phenotype is accompanied by a higher accumulation of iron, suggesting that OsABCI8 is involved in iron transportation and/or homeostasis in rice. Our results demonstrate that OsABCI8 represents a conserved ABCI protein involved in transition metals transportation and/or homeostasis and suggest an important role of the plastid-localized OsABCI8 for chloroplast development.
分类号: Q946
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