VlbZIP30 of grapevine functions in dehydration tolerance via the abscisic acid core signaling pathway

Abstract

Crop genetics: drought tolerance gene found in grape Researchers in China have identified a key gene involved in drought resistance in grapes. After exposing grape plants to drought, Xiping Wang’s team at Northwest A&F University observed increased expression of the VlbZIP30 gene. VlbZIP30 expression also increased in response to the plant hormone ABA, a known regulator of stress response. Further investigation demonstrated that VlbZIP30 probably regulates ABA signaling, though its precise activity remains unclear. The researchers discovered a genetic sequence consistently present in the promoters of genes activated by VlbZIP30. They also identified over 30 genes regulated by VlbZIP30. While many of these genes are probably involved in drought tolerance, more work will be needed to clarify their functions. These findings may serve to guide efforts to breed or engineer grape varieties with improved drought tolerance.