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Effects of Exogenous γ-aminobutyric Acid （GABA） on Reactive Oxygen Species and Antioxidant System of Isatis indigotica Fort.Seedlings Under Salt Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2021年06
Page:
111-116
Research Field:
Publishing date:

Info

Title:
Effects of Exogenous γ-aminobutyric Acid （GABA） on Reactive Oxygen Species and Antioxidant System of Isatis indigotica Fort.Seedlings Under Salt Stress
Author(s):
HAN Duohong1; 2基; WANG Enjun1; ZHANG Yong1; LU Ruixia1; WANG Hongxia1; WANG Yan1
(1.College of Life Sciences and Engineering,Hexi University,Zhangye,Gansu 734000;2.Key Provincial Laboratory of Universities in Gansu Provincefor Characteristic Resources Utility in Hexi Corridor,Zhangye,Gansu 734000)
Keywords:
Isatis indigotica Fort.; γ-aminobutyric acid(GABA); salt stress; reactive oxygen species; antioxidant enzyme
PACS:
-
DOI:
10.11937/bfyy.20201151
Abstract:
Isatis indigotica Fort. was used as experimental materials，the seedlings were treated with 100 mmol?L-1基 基NaCl solution，the concentrations of 0,3,6,9,12 mmol?L-1基 exogenous γ-aminobutyric acid were sprayed on the leaves,the content of reactive oxygen species(ROS)and antioxidant enzyme activities were determined in the seedlings in order to provide reference for enhancing salt tolerance of Isatis indigotica Fort..The results showed that the O?[TX-*4]基2 productive rate and H2O2 content in seedlings under NaCl stress were significantly increased,increasing by 120.73% and 113.09% compared with the control group.Spraying on the leaf 9 mmol?L-1基 of exogenous γ-aminobutyric acid,the O?[TX-*4]基2 productive rate and H2O2 content in NaCl stress reduced by 30.69%,41.10%,superoxide dismutase (SOD),peroxidase(POD),catalase(CAT) and ascorbic acid peroxidase(APX) activity increased 83.47%,42.38%,34.80% and 76.91%.Under NaCl stress,exogenous γ-aminobutyric基 acid concentration was negatively correlated with O?[TX-*4]基2 productive rate and H2O2 content,exogenous γ-aminobutyric基 acid concentration was positively correlated with the activities of superoxide dismutase(SOD),peroxidase (POD),catalase(CAT) and ascorbic acid peroxidase(APX)activity.According to the comprehensive analysis,the effects of exogenous γ-aminobutyric acid on relieving NaCl stress was 9 mmol?L-1基>6 mmol?L-1基>12 mmol?L-1基>3 mmol?L-1基.

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Last Update: 2021-06-09