光信号途径组分HEMERA调控拟南芥的花药发育  

HEMERA,a Component of Light Signaling Pathway,Regulates Anther Development in Arabidopsis thaliana

作　　者：王静雅 尚雪莹 李梦雨 马红 常芳 WANG Jingya;SHANG Xueying;LI Mengyu;MA Hong;CHANG Fang(Institute of Plant Biology,School of Life Sciences,Fudan University,Shanghai 200438,China)

机构地区：[1]复旦大学生命科学学院植物科学研究所

出　　处：《复旦学报（自然科学版）》2020年第1期11-19,共9页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金（31670316）

摘　　要：雄蕊是植物的雄性生殖器官,对植物繁衍及作物的产量至关重要.光信号影响拟南芥生殖发育过程,但作用机制知之甚少.HEMERA(HMR)是拟南芥光敏色素途径的主要成员之一,通过介导光敏色素B(PhyB)的定位及光信号途径重要转录因子PIF的降解而在植物光形态建成过程中发挥重要作用,但其在生殖发育中的功能尚不清楚.本研究利用hmr突变体及转基因恢复植物进行研究发现:HMR功能缺失导致花药变小、花粉数目减少、花粉萌发率显著降低,绒毡层部分空泡化并提前降解;并且,其转基因功能互补能恢复这些育性问题,说明HMR可能通过参与绒毡层降解过程而调节植物雄性育性.Stamens,the male reproductive organs of plants,are essential to plant reproduction and crop yield.Although light signals affect reproductive development of Arabidopsis thaliana,little is known about its mechanism.HEMERA(HMR)is one of the key members of phytochrome signaling pathways.It plays an important role in the photomorphogenesis process by mediating the subcellular localization of phytochrome B(PhyB)and the degradation of PIFs.However,whether it is required for reproductive development is still not clear.In this study,we showed that the hmr mutant exhibited decreased anther size and pollen number,reduced pollen germination rate,and partial vacuolizated tapetum cells.In addition,the HMR-HA transgenic plants restored all these fertility defects and presented phenotype similar to the wildtype.

关 键 词：拟南芥 雄蕊发育 绒毡层降解 光信号 HEMERA 

分 类 号：Q945[生物学—植物学]