报告题目𓀐😚：Closing the deal: Arabidopsis LORELEI is required for pollen tube reception by the female gametophyte

报告人💷：Ravi Palanivelu, School of Plant Sciences, University of Arizona, Tucson, Arizona(http://cals.arizona.edu/research/ravilab/)

主持人：李超 研究员

报告时间：2017年10月27日 14:30-15:30

报告地点🔱：闵行生科院534报告厅

主办单位：天美娱乐，科技处

 

报告人简介🚐： RAVISHANKAR PALANIVELU教授⚠，植物生殖发育专家，美国亚利桑那大学植物科学天美副教授。1998年在美国佐治亚大学博士毕业，1999年至2005年在美国芝加哥大学Daphne Preuss 实验室进行博士后研究👸，2006年至2012年为美国亚利桑那大学助理教授🐇，2012年起成为美国亚利桑那大学副教授👩🏽‍🎤。在Cell, Plant Cell, Plos Genetics, Plant Physiology等著名国际期刊发表论文30余篇。

 

报告摘要：Double fertilization, uniquely observed in plants, requires successful sperm cell delivery by the male gametophyte (pollen tube) to the female gametophyte (embryo sac), followed by migration, recognition and fusion of the two sperm cells with two female gametic cells. The female gametophyte regulates these steps that culminate in double fertilization. Yet, very little is known about the female gametophyte-expressed genes that regulate these essential events during plant reproduction. In a screen for genes critical for reproduction, we isolated a null allele of LORELEI, which encodes a putative glycosylphosphatidylinositol (GPI)-anchored protein and implicated it in inducing pollen tubes to arrest growth in the female gametophyte prior to releasing the sperm cells. I will provide an update on a variety of molecular, genetic, and cell biological approaches that were used to understand the role of LORELEI in inducing pollen tube reception, a very important signaling step that is also a critical pre-zygotic barrier in inter-specific crosses. These studies will address a long-standing but poorly understood essential question in plant reproductive biology: how the female gametophyte controls double fertilization.