干旱地区农业研究2025，Vol.43Issue(5)：79-86,8.DOI:10.7606/j.issn.1000-7601.2025.05.08
外源γ-氨基丁酸对盐胁迫下诸葛菜幼苗生长生理特性的影响
Effects of exogenous γ-aminobutyric on physiological characteristics of Orychophragmus violaceus seedlings under salt stress
摘要
Abstract
A pot experiment,which simulated the natural growth environment,was conducted to investigate whether exogenous γ-aminobutyric acid(GABA)could alleviate salt damage to ground cover plant Orychophragmus violaceus.Under the stress of 50 mmol·L-1 NaCl solution,different concentration gradients of γ-aminobutyric acid treatment solution(0.2,0.4,0.8,and 1.6 mmol·L-1)were applied to the seedlings of O.violaceus.Morphologi-cal indexes(root length,plant height,leaf width,and stem diameter)and physiological indexes(contents of chlo-rophyll,soluble protein,and MDA,and activities of SOD and POD)were measured on the 5th,10th,and 15th days of the experiment.Meanwhile,the cell structure of O.violaceus seedlings was observed by paraffin section technique,and the effect of exogenous application of GABA on the growth and physiology of O.violaceus seedlings under salt stress was investigated.The results showed that with the increase of exogenous GABA concentration,un-der different treatment days,the growth indictors of the seadlings showed a trend of increasing first and then decrea-sing.The net growth production of the plant height,leaf width,and stem diameter of O.violaceus were the highest under 0.4 mmol·L-1 GABA treatment,with an increase of 73.63％,66.55％,and 6.83％,respectively,and the MDA content was the lowest at 2.66 nmol·g-1.The 0.4 mmol·L-1 GABA treatment made the soluble protein con-tent,POD activity,SOD activity,and chlorophyll content of O.violaceus the highest,which were 17.34 mg·g-1,103.03 U·g-1·min-1,338.75 nmol·g-1,and 54.3(SPAD value),respectively.关键词
诸葛菜/盐胁迫/外源γ-氨基丁酸/生长生理特性/细胞组织结构Key words
O. violaceus/salt stress/exogenous γ-aminobutyric acid/growth physiological properties/cell tissue structure分类
农业科技引用本文复制引用
刘宏..外源γ-氨基丁酸对盐胁迫下诸葛菜幼苗生长生理特性的影响[J].干旱地区农业研究,2025,43(5):79-86,8.基金项目
中铁建设集团-青岛农业大学校企合作项目(JC23-04b) （JC23-04b）
