花粉管
多晶硅
胚珠
拟南芥
人类受精
花粉
细胞生物学
生物
拟南芥
受体
块(置换群论)
植物
胚胎
遗传学
突变体
基因
体外受精
授粉
几何学
数学
作者
Sheng Zhong,Ling Li,Zhijuan Wang,Zengxiang Ge,Qiyun Li,Andrea Bleckmann,Jizong Wang,Zihan Song,Yihao Shi,Tianxu Liu,Luhan Li,Huabin Zhou,Yanyan Wang,Li Zhang,Hen‐Ming Wu,Luhua Lai,Hongya Gu,Juan Dong,Alice Y. Cheung,Thomas Dresselhaus,Li‐Jia Qu
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2022-01-21
卷期号:375 (6578): 290-296
被引量:73
标识
DOI:10.1126/science.abl4683
摘要
Fertilization of an egg by multiple sperm (polyspermy) leads to lethal genome imbalance and chromosome segregation defects. In Arabidopsis thaliana, the block to polyspermy is facilitated by a mechanism that prevents polytubey (the arrival of multiple pollen tubes to one ovule). We show here that FERONIA, ANJEA, and HERCULES RECEPTOR KINASE 1 receptor-like kinases located at the septum interact with pollen tube-specific RALF6, 7, 16, 36, and 37 peptide ligands to establish this polytubey block. The same combination of RALF (rapid alkalinization factor) peptides and receptor complexes controls pollen tube reception and rupture inside the targeted ovule. Pollen tube rupture releases the polytubey block at the septum, which allows the emergence of secondary pollen tubes upon fertilization failure. Thus, orchestrated steps in the fertilization process in Arabidopsis are coordinated by the same signaling components to guarantee and optimize reproductive success.
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