KIRA1 and ORESARA1 terminate flower receptivity by promoting cell death in the stigma of Arabidopsis Journal Article


Author(s): Gao, Zhen; Daneva, Anna; Salanenka, Yuliya; Van Durme, Matthias; Huysmans, Marlies; Lin, Zongcheng; De Winter, Freya; Vanneste, Steffen; Karimi, Mansour; Van De Velde, Jan; Vandepoele, Klaas; Van De Walle, Davy; Dewettinck, Koen; Lambrecht, Bart N; Nowack, Moritz K
Article Title: KIRA1 and ORESARA1 terminate flower receptivity by promoting cell death in the stigma of Arabidopsis
Affiliation IST Austria
Abstract: Flowers have a species-specific functional life span that determines the time window in which pollination, fertilization and seed set can occur. The stigma tissue plays a key role in flower receptivity by intercepting pollen and initiating pollen tube growth toward the ovary. In this article, we show that a developmentally controlled cell death programme terminates the functional life span of stigma cells in Arabidopsis. We identified the leaf senescence regulator ORESARA1 (also known as ANAC092) and the previously uncharacterized KIRA1 (also known as ANAC074) as partially redundant transcription factors that modulate stigma longevity by controlling the expression of programmed cell death-associated genes. KIRA1 expression is sufficient to induce cell death and terminate floral receptivity, whereas lack of both KIRA1 and ORESARA1 substantially increases stigma life span. Surprisingly, the extension of stigma longevity is accompanied by only a moderate extension of flower receptivity, suggesting that additional processes participate in the control of the flower's receptive life span.
Journal Title: Nature Plants
Volume: 4
Issue 6
ISSN: 2055-0278
Publisher: Nature Publishing Group  
Date Published: 2018-05-28
Start Page: 365
End Page: 375
DOI: 10.1038/s41477-018-0160-7
Notes: We gratefully acknowledge funding from the Chinese Scholarship Council (CSC; project number 201206910025 to Z.G.), the Fonds Wetenschappelijk Onderzoek (FWO; project number G005112N to A.D.; fellowship number 12I7417N to Z.L.), the Belgian Federal Science Policy Office (BELSPO; to Y.S.), the Agency for Innovation by Science and Technology of Belgium (IWT; fellowship number 121110 to M.V.D.), the Hercules foundation (grant AUGE-09-029 to K.D.), and the ERC StG PROCELLDEATH (project number 639234 to M.K.N.).
Open access: no