<Emphasis Type="Italic">BRITTLE SHEATH1</Emphasis> encoding OsCYP96B4 is involved in secondary cell wall formation in rice |
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| Authors: | Xiaole Wang Zhijun Cheng Zhichao Zhao Lu Gan Ruizhen Qin Kunneng Zhou Weiwei Ma Baocai Zhang Jiulin Wang Huqu Zhai Jianmin Wan |
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| Institution: | 1.National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science,Chinese Academy of Agricultural Sciences,Beijing,China;2.National Key Laboratory for Crop Genetics and Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center,Nanjing Agricultural University,Nanjing,China;3.State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing,China |
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| Abstract: | Key message Mutation of BSH1 leads to brittle sheath phenotype and reduction of very-long-chain fatty acids and their derivatives in wax. AbstractThe cell wall plays an important role in plant mechanical strength. Several brittle culm mutants have been identified and characterized in rice. Here, we characterized an anther culture-derived rice brittle sheath mutant, named bsh1 and isolated BSH1 via map-based strategy. BSH1 encodes OsCYP96B4 protein, which was localized on ER membrane in the protoplast transient assay. BSH1 is mainly expressed in developing vascular tissues and the cells in which cell wall secondary thickening is occurring. Mutation in bsh1 causes changes in cell wall composition by affecting the expression of cell wall-related genes. Moreover, bsh1 shows reduced amounts of very-long-chain fatty acids and their derivatives in wax rather than the medium-chain fatty acids. In summary, BSH1 functions mainly in secondary cell wall formation, and probably in wax biosynthesis in an unidentified mechanism. |
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