Deciphering the Stigmatic Transcriptional Landscape of Compatible and Self-Incompatible Pollinations in Brassica napus Reveals a Rapid Stigma Senescence Response Following Compatible Pollination

作     者：Subramanian Sankaranarayanan[a],, Muhammad Jamshed[a],, Srijani Deb[a], Kate Chatfield-Reed[b], Eun-Joo Gina Kwon[b], Gordon Chua[b], Marcus A. Samuel[a], 

作者机构：[a] Department of Biological Sciences University of Calgary 2500 University Drive NW Calgary AB T2N 1N4 Canada[b] Institute of Biocomplexity and Informatics Department of Biological Sciences University of Calgary Calgary AB Canada 

出 版 物：《Molecular Plant》 (分子植物（英文版）)

年 卷 期：2013年第6卷第6期

页      面：1988-1991页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 09[农学] 071007[理学-遗传学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

基　　金：supported by Natural Sciences and Engineering Research Council of Canada grants and start-up funds from University of Calgary to M.A.S. and G.C 

主　　题：Self-incompatibility (SI) Brassica napus 

摘      要：Dear Editor, Self-incompatibility （SI） is a genetic mechanism through which flowering plants prevent self-pollination to ensure out- crossing and genetic diversity. In Brassica sp., this mechanism is controlled by the self-incompatibility （S） locus, in which, the stigmatic ＇S-locus receptor kinase （SRK）＇ recognizes the ＇S-locus cysteine rich protein （SCR）＇ from the self-pollen to elicit an active rejection response. This results in blocking of compatibil- ity factors from being delivered to the site of pollen attachment leading to self-pollen rejection （Chapman and Goring, 2010）. In contrast, following recognition of compatible signals from the cross-pollen or compatible pollen （CP）, the stigma releases its resources such as water and nutrients to the dry pollen so that the pollen tube can germinate and penetrate the stigmatic cuticle leading to successful fertilization. Thus, an incompatible or self-pollen is fully capable of eliciting a compatible response, but is actively rejected before compatible responses can occur.