OsMS188 Is a Key Regulator of Tapetum Development and Sporopollenin Synthesis in Rice.
OsMS188 Is a Key Regulator of Tapetum Development and Sporopollenin Synthesis in Rice.
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OsMS188 是水稻绒毡层发育和孢粉质合成的关键调节因子
DOI:
10.1186/s12284-020-00451-y
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发表时间:
2021-01-06
期刊:
影响因子:
--
通讯作者:
Yang ZN
中科院分区:
文献类型:
--
作者:
Han Y;Zhou SD;Fan JJ;Zhou L;Shi QS;Zhang YF;Liu XL;Chen X;Zhu J;Yang ZN
BackgroundDuring anther development, the tapetum provides essential nutrients and materials for pollen development. In rice, multiple transcription factors and enzymes essential for tapetum development and pollen wall formation have been cloned from male-sterile lines.ResultsIn this study, we obtained several lines in which the MYB transcription factorOsMS188was knocked out through the CRISPR-Cas9 approach. Theosms188lines exhibited a male-sterile phenotype with aberrant development and degeneration of tapetal cells, absence of the sexine layer and defective anther cuticles.CYP703A3,CYP704B2,OsPKS1,OsPKS2,DPWandABCG15are sporopollenin synthesis and transport-related genes in rice. Plants with mutations in these genes are male sterile, with a defective sexine layer and anther cuticle. Further biochemical assays demonstrated that OsMS188 binds directly to the promoters of these genes to regulate their expression.UDT1,OsTDF1,TDR,bHLH142andEAT1are upstream regulators of rice tapetum development. Electrophoretic mobility shift assays (EMSAs) and activation assays revealed that TDR directly regulatesOsMS188expression. Additionally, protein interaction assays indicated that TDR interacts with OsMS188 to regulate downstream gene expression.ConclusionOverall, OsMS188 is a key regulator of tapetum development and pollen wall formation. The gene regulatory network established in this work may facilitate future investigations of fertility regulation in rice and in other crop species.
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