Chloroplast retrograde signal regulates flowering

作  者:Feng PQ, Guo HL, Chi W, Chai X, Sun XW, Xu XM, Ma JF, Rochaix JD, Leister D, Wang HY, Lu CM, Zhang LX*
影响因子:9.423
刊物名称:PNAS
出版年份:2016
卷:113  期:38  页码:10708-10713

论文摘要:

Light is a major environmental factor regulating flowering time, thus ensuring reproductive success of higher plants. In contrast to our detailed understanding of light quality and photoperiod mechanisms involved, the molecular basis underlying high light-promoted flowering remains elusive. Here we show that, in Arabidopsis, a chloroplast-derived signal is critical for high light-regulated flowering mediated by the FLOWERING LOCUS C (FLC). We also demonstrate that PTM, a PHD transcription factor involved in chloroplast retrograde signaling, perceives such a signal and mediates transcriptional repression of FLC through recruitment of FVE, a component of the histone deacetylase complex. Thus, our data suggest that chloroplasts function as essential sensors of high light to regulate flowering and adaptive responses by triggering nuclear transcriptional changes at the chromatin level.