OsCOL10, aCONSTANS-LikeGene, Functions as a Flowering Time Repressor Downstream ofGhd7in Rice

• DOI: 10.1093/pcp/pcw025
• Publication Date: 2016-02-13T11:36:59Z
• Authors: Junjie Tan; Mingna Jin; Jiachang Wang; Fuqing Wu; Peike Sheng; Zhijun Cheng; Jiulin Wang; Xiaoming Zheng; Liping Chen; Min Wang; Shanshan Zhu; Xiuping Guo; Xin Zhang; Xuanming Liu; Chunming Wang; Haiyang Wang; Chuanyin Wu; Jianmin Wan
• Keywords: Genetically modified rice

Flowering time, or heading date, is a critical agronomic trait that determines the cropping season and regional adaptability, ultimately grain yield in rice. A number of genes involved photoperiodic flowering have been cloned their roles modulating expression characterized to certain extent. However, much less known about pathway transmitting day length response signal(s) induce transition reproductive growth. Here, we report constitutive repressor OsCOL10 , which encodes member CONSTANS-like (COL) family. Transgenic rice plants overexpressing (driven by strong promoter fusing it activation domain VP64) showed delayed time under both short long days. affected circadian clock preferentially expressed leaf mesophyll cells; localized nucleus has transcriptional activity. Further studies show represses FT -like RFT1 Hd3a through Ehd1. Transcripts are more abundant carrying functional Ghd7 allele than -deficient plants, thus placing downstream Ghd7. Taking these findings together, conclude functions as links Ehd1