Transcriptomic and phosphoproteomic profiling and metabolite analyses reveal the mechanism of NaHCO₃-induced organic acid secretion in grapevine roots.

ABSTRACT:

Background

Organic acid secretion is a widespread physiological response of plants to alkalinity. However, the characteristics and underlying mechanism of the alkali-induced secretion of organic acids are poorly understood.

Results

Oxalate was the main organic acid synthesized and secreted in grapevine (a hybrid of Vitis amurensis, V. berlandieri and V. riparia) roots, while acetate synthesis and malate secretion were also promoted under NaHCO₃ stress. NaHCO₃ stress enhanced the H⁺ efflux rate of grapevine roots, which is related to the plasma membrane H⁺-ATPase activity. Transcriptomic profiling revealed that carbohydrate metabolism was the most significantly altered biological process under NaHCO₃ stress; a total of se

SUBMITTER: Xiang G 

PROVIDER: S-EPMC6724372 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature