Speaker：Weitong Gao (高维通) Yupu Wang (王玉璞) Zhuoran Li (李卓然) Qiliang Lai (赖其梁)

Abstract:

An efficient and successful fertilization is important to flowering plants, which have limited time for fertilization and a restricted supply of water. The pollen tube of the male gametophyte includes a vegetative nucleus and two sperm cells. Sperm cells are non-motile, so they need to be delivered through the pollen tube to the egg cell in the ovule. The pollen tube grows through the pistil and reaches the ovule, where it invades the synergid cell and subsequently ruptures; this leads to the discharge of its cytoplasmic content, including the sperm cells, and double fertilization occurs.

So in the journal club, each of us will focus on one step of pollen tube growth, which are preovular guidance, pollen tube emergence, ovule guidance (main paper 1) and pollen tube rupture (main paper 2). We discuss about the phenomenon in pollen tube growth and analysis the molecular mechanisms beneath them.

Guest information:

Dr. Li-Jia Qu (PKU)

http://www.bio.pku.edu.cn/teacher_dis_oa.php?cid=146&&teaid=52

Recommend Literatures：

Review:

1. Mizuta, Y. & Higashiyama, T. Chemical signaling for pollen tube guidance at a glance. J. Cell Sci. 131, jcs208447 (2018).

Link：http://jcs.biologists.org/content/joces/131/2/jcs208447.full.pdf

Papers:

1. Wang, T. et al. A receptor heteromer mediates the male perception of female attractants in plants. Nature 531, 241–244 (2016).

Link: https://www.nature.com/articles/nature16975

2. Ge, Z. et al. Arabidopsis pollen tube integrity and sperm release are regulated by RALF-mediated signaling. Science (80-.). 358, 1596–1600 (2017).

Link: http://science.sciencemag.org/content/358/6370/1596.long