PbCOL8 is a clock-regulated flowering time repressor in pear |
| |
Authors: | Peng Wang Zhe Liu Peng Cao Xueying Liu Xiaoping Wu Kaijie Qi Shaoling Zhang Juyou Wu |
| |
Institution: | 1.Centre of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture,Nanjing Agricultural University,Nanjing,China |
| |
Abstract: | The floral transition is controlled by diverse endogenous and exogenous cues. In many species, COL (CONSTANS-like) genes integrate light and circadian clock signals to regulate flowering time. However, little is known about COLs in perennial woody plants. Here, we identified 15 PbCOLs in pear (Pyrus bretschneideri). PbCOLs were classified into three groups by phylogenetic tree analysis using protein sequences. Multiple sequence alignment analysis revealed conserved B-box and CCT (CO, CO-like, and TOC1) domains in all PbCOL members. This result suggested that PbCOLs might possess conserved functions as other species. Six PbCOLs were found to be regulated by both circadian clock and photoperiod. Here, we showed that PbCOL8, a member of group 2, suppressed the flowering signal integrators FT and SOC1 and could repress flowering time. These findings will contribute to elucidation of the mechanism of floral initiation in pear. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|