High Constitutive Overexpression of Glycosyl Hydrolase Family 17 Delays Floral Transition by Enhancing FLC Expression in Transgenic Arabidopsis.

glycosyl hydrolase family 17 (VvGHF17) is a grape apoplasmic β-1,3-glucanase, which belongs to glycosyl hydrolase family 17 in grapevines. β-1,3-glucanase is not only involved in plant defense response but also has various physiological functions in plants. Although expression is negatively related to the length of inflorescence in grapevines, the physiological functions of are still uncertain. To clarify the physiological functions of , we conducted a phenotypic analysis of VvGHF17-overexpressing plants. VvGHF17-overexpressing plants showed short inflorescence, similar to grapevines. These results suggested that might negatively regulate the length of inflorescence in plants. expression induced a delay of floral transition in plants. The expression level of (), known as a floral repressor gene, in inflorescence meristem of transgenic plants were increased by approximately 10-fold as compared with wild plants. These results suggest that induces a delay of floral transition by enhancing expression and concomitantly decreases the length of plant inflorescence.