Phytochrome B1-dependent control of SP5G transcription is the basis of the night break and red to far-red light ratio effects in tomato flowering

文献类型： 外文期刊

第一作者： Cao, Kai

作者： Cao, Kai;Xu, Dawei;Bao, Encai;Zou, Zhirong;Yan, Fei;Cao, Kai;Xu, Dawei;Ai, Kaiqi;Yu, Jie;Bao, Encai;Zou, Zhirong;Cao, Kai;Bao, Encai

作者机构：

关键词： Tomato; Red to far-red light ratio; Night break; Phytochrome B1; Flowering; SP5G

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2018 年 18 卷

页码：

收录情况： SCI

摘要： Background: Phytochromes are dimeric proteins with critical roles in perceiving day length and the environmental signals that trigger flowering. Night break (NB) and the red to far-red light ratio (R:FR) have been used extensively as tools to study the photoperiodic control of flowering. However, at the molecular level, little is known about the effect of NB and different R:FR values on flowering in day-neutral plants (DNPs) such as tomato. Results: Here, we show that tomato SP5G, SP5G2, and SP5G3 are homologs of Arabidopsis thaliana FLOWERING LOCUS T (FT) that repress flowering in Nicotiana benthamiana. NB every 2 h at intensities of 10 mu mol(-2) s(-1) or lower R:FR (e.g., 0.6) caused a clear delay in tomato flowering and promoted SP5G mRNA expression. The promoted SP5G mRNA expression induced by red light NB and low R:FR treatments was reversed by a subsequent FR light stimulus or a higher R:FR treatment. The tomato phyB1 mutation abolished the effects of NB and lower R:FR treatments on flowering and SP5G mRNA expression, indicating that the effects were mediated by phytochrome B1 in tomato. Conclusion: Our results strongly suggest that SP5G mRNA suppression is the principal cause of NB and lower R:FR effects on flowering in tomato.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序