Ca Involved in GABA Signal Transduction for Phenolics Accumulation in Germinated Hulless Barley Under NaCl Stress

Overview

Journal Food Chem X

Date 2019 Aug 22

PMID 31432010

Citations 13

Authors

Yan Ma

Pei Wang

Zhenxin Gu

Yang Tao

Chang Shen

Yulin Zhou

Yongbin Han

Runqiang Yang

Affiliations

Soon will be listed here.

Abstract

In this study, in order to investigate the role of Ca in GABA signal transduction involved in phenolics accumulation in barley seedlings under NaCl stress, the seedlings were treated with exogenous GABA and its synthesis inhibitor, 3-mercaplopropionic acid (3-MP), as well as Ca channel blockers La, Ca chelator EGTA, and Ca release channel inhibitor 2-aminoethoxydiphenyl borate (2-APB). The results showed that GABA significantly enhanced phenolics, calcium and calmodulin content. It also induced Ca influx in barley root tips cells, and altered the distribution of Ca, making calcium precipitates more uniform and intensive. While, 3-MP treatment led to opposite changes, which suggested that GABA was essential for calcium content increase. In addition, accumulation of phenolics was inhibited by LaCl, EGTA and 2-APB treatments, and this inhibition could be alleviated partly by exogenous GABA. Taken together, Ca was involved in GABA signal transduction for phenolics accumulation in barley seedlings under NaCl stress.

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