FERONIA receptor kinase-regulated reactive oxygen species mediate self-incompatibility in Brassica rapa
文献类型： 外文期刊
作者： Zhang, Lili 1 ; Huang, Jiabao 1 ; Su, Shiqi 1 ; Wei, Xiaochun 4 ; Yang, Lin 1 ; Zhao, Huanhuan 1 ; Yu, Jianqiang 1 ; Wang 1 ;
作者机构： 1.Shandong Agr Univ, State Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China
2.Shandong Agr Univ, China Coll Hort Sci & Engn, Tai An 271018, Shandong, Peoples R China
3.Rutgers State Univ, Sch Arts & Sci, New Brunswick, NJ 08901 USA
4.Henan Acad Agr Sci, Inst Hort, Zhengzhou 450002, Henan, Peoples R China
5.Univ Massachusetts, Dept Biochem & Mol Biol, Mol Cell Biol & Plant Biol Programs, Amherst, NY 01003 USA
6.9220 Enfield Dr, Johnston, IA 50131 USA
7.Corteva Agrisci, Trait Discovery, Johnston, IA 50131 USA
期刊名称：CURRENT BIOLOGY （ 影响因子：10.834； 五年影响因子：11.713 ）
ISSN： 0960-9822
年卷期： 2021 年 31 卷 14 期
页码：
收录情况： SCI
摘要： Most plants in the Brassicaceae evolve self-incompatibility (SI) to avoid inbreeding and generate hybrid vigor. Self-pollen is recognized by the S-haplotype-specific interaction of the pollen ligand S-locus protein 11 (SP11) (also known as S-locus cysteine-rich protein [SCR]) and its stigma-specific S-locus receptor kinase (SRK). However, mechanistically much remains unknown about the signaling events that culminate in self pollen rejection. Here, we show that self-pollen triggers high levels of reactive oxygen species (ROS) in stigma papilla cells to mediate SI in heading Chinese cabbage (Brassica rapa L. ssp. pekinensis). We found that stigmatic ROS increased after self-pollination but decreased after compatible(CP)-pollination. Reducing stigmatic ROS by scavengers or suppressing the expression of respiratory burst oxidase homologs (Rbohs), which encode plant NADPH oxidases that produce ROS, both broke down SI. On the other hand, increasing the level of ROS inhibited the germination and penetration of compatible pollen on the stigma, mimicking an incompatible response. Furthermore, suppressing a B. rapa FERONIA (FER) receptor kinase homolog or Rac/ Rop guanosine triphosphatase (GTPase) signaling effectively reduced stigmatic ROS and interfered with SI. Our results suggest that FER-Rac/Rop signaling-regulated, NADPH oxidase-produced ROS is an essential SI response leading to self-pollen rejection.
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