Deficiency of a triterpene pathway results in humidity-sensitive genic male sterility in rice

作  者:Xue ZY, Xu X, Zhou YA, Wang XN, Zhang YC, Liu D, Zhao BB, Duan LX, Qi XQ*
影响因子:12.124
刊物名称:Nature Communications
出版年份:2018
卷:9  期:  页码:604

论文摘要:

In flowering plants, the pollen coat protects the released male germ cells from desiccation and damage during pollination. However, we know little about the mechanism by which the chemical composition of the pollen coat prevents dehydration of pollen grains. Here we report that deficiency of a grass conserved triterpene synthase, OsOSC12/OsPTS1, in rice leads to failure of pollen coat formation. The mutant plants are male sterile at low relative humidity (RH < 60%), but fully male fertile at high relative humidity (>80%). The lack of three major fatty acids in the pollen coat results in rapid dehydration of pollen grains. We show that applying mixtures of linolenic acid and palmitic acid or stearic acid are able to prevent over-dehydration of mutant pollen grains. We propose that humidity-sensitive genic male sterility (HGMS) could be a desirable trait for hybrid breeding in rice, wheat, maize, and other crops.

 

全文链接:https://www.nature.com/articles/s41467-018-03048-8