Journal of experimental botany 2016 18
The rice YABBY4 gene regulates plant growth and development through modulating the gibberellin pathway.
YABBY genes encode seed plant-specific transcription factors that play pivotal roles in diverse aspects of leaf, shoot, and flower development. Members of the YABBY gene family are primarily expressed in lateral organs in a polar manner and function to specify abaxial cell fate in dicotyledons, but this polar expression is not conserved in monocotyledons. The function of YABBY genes is therefore not well understood in monocotyledons. Here we shom' data-tid='321' href='#term-321'>w that overexpression of the rice (Oryza sativa L.) YABBY4 gene (OsYABBY4) leads to a semi-dwarf phenotype, abnormal development in the uppermost internode, an increased number of floral organs, and insensitivity to gibberellin (GA) treatment. We report on an important role for='326' href='#term-326'> OsYABBY4 in negata>ive control of the expression of a GA biosynthetic gene by binding to the promoter region of the gibberellin 20-oxidase 2 gene (GA20ox2), which is a direct target of SLR1 (the sole DELLA protein negatively controlling GA responses in rice). OsYABBY4 also suppresses the expression level of SLR1 and interacts with SLR1 protein. The interaction inhibits GA-dependent degradation of SLR1 and therefore leads to GA insensitivity. These data together suggest that OsYABBY4 serves as a DNA-binding intermediate protein for SLR1 and is associated with the GA signaling pathway regulating gene expression during plant growth and development.
|YABBY gene||Os07g0160100||Q7XIM7 B7EH95 A0A0P0X2Q2 A0A0N7KMZ0|
|w that||Os02g0643200||Q6H668 B7EZN7|
|m' data-||Os02g0643200||Q6H668 B7EZN7|
|pment in||Os02g0643200||Q6H668 B7EZN7|
|r OsYABB||Os02g0643200||Q6H668 B7EZN7|
|in negat||Os02g0643200||Q6H668 B7EZN7|