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OsLTP47 may function in a lipid transfer relay essential for pollen wall development in rice

文献类型： 外文期刊

作者： Chen, Libin 1 ; Ji, Chonghui 1 ; Zhou, Degui 1 ; Gou, Xin 1 ; Tang, Jianian 1 ; Jiang, Yongjie 1 ; Han, Jingluan 1 ; Liu, Yao-Guang 1 ; Chen, Letian 1 ; Xie, Yongyao 1 ;

作者机构： 1.South China Agr Univ, Coll Life Sci, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Guangdong, Peoples R China

2.Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Guangdong, Peoples R China

3.Guangdong Acad Agr Sci, Rice Res Inst, Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Guangdong, Peoples R China

4.Fujian Agr & Forestry Univ, Fujian Prov Key Lab Plant Virol, Vector Borne Virus Res Ctr, Fuzhou 350002, Fujian, Peoples R China

关键词： Rice; Pollen wall; Lipid transfer protein; Male sterility

期刊名称：JOURNAL OF GENETICS AND GENOMICS （ 影响因子：5.723； 五年影响因子：5.755 ）

ISSN： 1673-8527

年卷期： 2022 年 49 卷 5 期

页码：

收录情况： SCI

摘要： In plants, lipid transfer proteins (LTPs) transport pollen wall constituents from the tapetum to the exine, a process essential for pollen wall development. However, the functional cooperation of different LTPs in pollen wall development is not well understood. In this study, we have identified and characterized a grass-specific LTP gene, OsLTP47, an important regulator of pollen wall formation in rice (Oryza sativa). OsLTP47 encodes a membrane-localized LTP and in vitro lipid-binding assays confirms that OsLTP47 has lipid-binding activity. Dysfunction of OsLTP47 causes disordered lipid metabolism and defective pollen walls, leading to male sterility. Yeast two-hybrid and pull-down assays reveal that OsLTP47 physically interacts with another LTP, OsC6. These findings suggest that the plasma membrane-localized OsLTP47 may function as a mediator in a lipid transfer relay through association with cytosolic and/or locular OsC6 for pollen wall development and that various LTPs may function in a coordinated manner to transport lipid molecules during pollen wall development. Copyright (C) 2022, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. All rights reserved.

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