Programmed Cell Death in Stigmatic Papilla Cells Is Associated With Senescence-Induced Self-Incompatibility Breakdown in Chinese Cabbage and Radish
文献类型： 外文期刊
作者： Huang, Jiabao 1 ; Su, Shiqi 1 ; Dai, Huamin 1 ; Liu, Chen 2 ; Wei, Xiaochun 3 ; Zhao, Yanyan 3 ; Wang, Zhiyong 3 ; Zhang, 1 ;
作者机构： 1.Shandong Agr Univ, State Key Lab Crop Biol, Coll Hort Sci & Engn, Tai An, Shandong, Peoples R China
2.Shandong Acad Agr Sci, Inst Vegetables & Flowers, Jinan, Peoples R China
3.Henan Acad Agr Sci, Inst Hort, Zhengzhou, Peoples R China
4.Zhejiang Univ, Inst Vegetable Sci, Hangzhou, Peoples R China
5.Nanjing Agr Univ, Dept Hort, Nanjing, Peoples R China
6.Corteva Agrisci, Trait Discovery, Johnston, IA USA
7.Univ Massachusetts Amherst, Dept Biochem & Mol Biol, Amherst, MA USA
关键词： self-incompatibility; flower senescence; plant senescence; PCD; ethylene; Brassicaceae
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2020 年 11 卷
页码：
收录情况： SCI
摘要： Self-incompatibility (SI) is a genetic mechanism flowering plants adopted to reject self-pollen and promote outcrossing. In the Brassicaceae family plants, the stigma tissue plays a key role in self-pollen recognition and rejection. We reported earlier in Chinese cabbage (Brassica rapa) that stigma tissue showed upregulated ethylene responses and programmed cell death (PCD) upon compatible pollination, but not in SI responses. Here, we show that SI is significantly compromised or completely lost in senescent flowers and young flowers of senescent plants. Senescence upregulates senescence-associated genes in B. rapa. Suppressing their expression in young stigmas by antisense oligodeoxyribonucleotide abolishes compatible pollination-triggered PCD and inhibits the growth of compatible pollen tubes. Furthermore, ethylene biosynthesis genes and response genes are upregulated in senescent stigmas, and increasing the level of ethylene or inhibiting its response increases or decreases the expression of senescence-associated genes, respectively. Our results show that senescence causes PCD in stigmatic papilla cells and is associated with the breakdown of SI in Chinese cabbage and in radish.
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