The chromatin-remodelling factor PICKLE interacts with CONSTANS to promote flowering in Arabidopsis

作  者:Jing YJ*, Guo Q, Zha P, Lin RC*
影响因子:5.624
刊物名称:Plant Cell and Environment
出版年份:2019
卷:42  期:8  页码:2495-2507

论文摘要:

In many flowering plants, successful reproductive development depends on the plant's ability to sense seasonal photoperiodic changes and adjust its vegetative growth accordingly. In Arabidopsis thaliana, the daylengthdependent accumulation of CONSTANS (CO) is crucial for the rhythmic activation of FLOWERING LOCUS T (FT) expression at dusk under long days. However, the regulation of photoperioddependent changes of the diurnal FTexpression pattern at the chromatin level is largely unknown. In this study, we show that the ATPasedependent chromatinremodelling factor PICKLE (PKL) acts through the COFT regulatory module and contributes to FT activation in leaf vasculature. PKL physically interacts with CO, and this interaction facilitates their binding to the common regions of FT chromatin in response to photoperiod. Longday signal triggers the FT chromatin switch between the active state at dusk and the inactive state at night, and PKL is responsible for the diurnal state switch. Thus, our study reveals that PKL activates FTtranscription likely through facilitating access of CO to FT chromatin at dusk to synchronize flowering time in response to environmental cues.

全文链接:https://onlinelibrary.wiley.com/doi/full/10.1111/pce.13557