Nucleoporin Nup98 participates in flowering regulation in a CONSTANS-independent mode

文献类型： 外文期刊

第一作者： Jiang, Shanshan

作者： Jiang, Shanshan;Huang, Penghui;Cheng, Zhiyuan;Chen, Fulu;Fu, Yong-Fu;Zhang, Xiao-Mei;Xiao, Long;Chen, Qingshan;Miao, Yuchen

作者机构：

关键词： Nuclear pore complex; Nucleoporin; Nup98; Flowering; CONSTANS; FLOWERING LOCUS T; Arabidopsis

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2019 年 38 卷 10 期

页码：

收录情况： SCI

摘要： Key message Two redundant nucleoporin genes Nup98a and Nup98b bypass the CO-check point in photoperiodic signaling and integrated signals from multiple pathways to directly target FT for flowering control in Arabidopsis. Flowering regulation is an important and widely studied plant development event. Even though nucleoporin Nup98 has been proven to play pivotal roles in the growth and development of mammalian cells and yeast, it is still unknown if Nup98 participates in flowering control in plants. In this study, we investigated the function of two Nup98 homologs, Nup98a and Nup98b, in flowering regulation in Arabidopsis. The results showed that Nup98a and Nup98b redundantly inhibit flowering through multiple pathways including clock, photoperiod, and age pathways. Single mutants of nup98a and nup98b do not show any obvious abnormal phenotypes compared to wild-type plants; however, the nup98a1 nup98b1 double mutant displays early flowering. Significantly, Nup98a/Nup98b gate flowering in a CONSTANS (CO)-independent mode. Therefore, Nup98a/Nup98b bypasses the CO checkpoint in photoperiodic signaling and integrated signals from multiple pathways to directly target FLOWERING LOCUS T (FT) for flowering control. In addition, our results provide a line of genetic evidence for uncoupling the mechanism of flowering and senescence at Nup98a/Nup98b genes in Arabidopsis, which are classically recognized as two coupled developmental events.

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