作物研究2024，Vol.38Issue(2)：79-83,103,6.
γ-氨基丁酸响应和缓解水稻镉胁迫的效应研究
Investigating the Response of γ-Aminobutyric Acid and Its Alleviating Effects on Cadmium Stress in Rice
摘要
Abstract
To explore the role of γ-aminobutyric acid(GABA)in mitigating cadmium(Cd)stress in rice,this study a-ssessed the growth of rice seedlings under Cd stress,measured plant Cd and GABA levels,analyzed the expression of key genes in the GABA synthesis pathway,and observed changes in plant height following exogenous application of GABA.The experiments were conducted using the japonica rice cultivar'Zhonghua 11'as the test material.The results demonstrate that treatments with 0.5,5,25,and 50 μmol/L of Cd all inhibited the growth of rice,with an increasing concentration lea-ding to a gradual increase in Cd accumulation in both roots and shoots.The ratio of GABA content between shoots and roots decreased gradually with increasing Cd concentration.Gene expression analysis revealed that one betaine aldehyde dehydro-genase coding gene in the roots was upregulated by 1.83-fold under Cd treatment,while the expression of three arginine decarboxylase coding genes in the roots was upregulated by more than 4.00-fold under Cd treatment.These genes likely play pivotal roles in regulating GABA synthesis under Cd stress conditions.Moreover,exogenous application of GABA re-sulted in a significant increase in GABA accumulation in rice plants.Remarkably,GABA treatment at optimal concentra-tions effectively mitigated Cd stress in rice,highlighting its potential as a promising strategy for alleviating Cd-induced tox-icity.These findings offer a reference for conducting a more comprehensive study on the role of GABA in Cd stress.关键词
水稻/γ-氨基丁酸/镉胁迫/响应Key words
rice/GABA/cadmium stress/response分类
农业科技引用本文复制引用
万国凤,杨威,孟栓..γ-氨基丁酸响应和缓解水稻镉胁迫的效应研究[J].作物研究,2024,38(2):79-83,103,6.基金项目
湖南省自然科学基金(2022JJ30284) （2022JJ30284）
湖南省教育厅科技项目(23A0184) （23A0184）
湖南农业大学研究生科研创新项目(2022XC036). （2022XC036）
