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Effect of Drought Stress Simulated by PEG on Antioxidant Enzyme Activitiesand Antioxidant Capacity in Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2016年04期
Page:
616-619,636
Research Field:
Publishing date:

Info

Title:
Effect of Drought Stress Simulated by PEG on Antioxidant Enzyme Activitiesand Antioxidant Capacity in Soybean
Author(s):
GAO Xin-yu; LIU Li-jun; LIU Bo; MA Yu-ling; WANG Ｒui-qi; DONG Shou-kun
( College of Agriculture，Northeast Agricultural University，Harbin 150030，China)
Keywords:
Drought;  Soybean;  Antioxidant enzyme;  Antioxidant capacity
PACS:
S565. 1
DOI:
10.11861/j.issn.1000-9841.2016.04.0616
Abstract:
In this experiment，Heinong 44 ( HN44) and Heinong 65 ( HN65) soybean were used as tested materials，20%concentrations of PEG-6000 was used to simulate drought stress，thus to study the effect of drought stress on soybean leavesantioxidant enzyme activities and antioxidant capacity during anthesis. The results showed that with the treatment time prolonging，soybean leaves superoxide dismutase ( SOD) ，peroxidase ( POD) and catalase ( CAT) activity，total antioxidant capacity(T-AOC) ，superoxide anion scavenging capacity( SASC) and hydroxyl free radical scavenging capacity( HＲS) firstly increasedand then decreased with stress time prolong. In the processing period，the indexes of drought resistant varieties HN44were higher than that of the sensitive varieties HN65 in control and treatment group. Correlation analysis showed that the CATand SOD activity，SASC and CAT activity，HＲS and SOD activity，HＲS and SASC presented extremely remarkable positivecorrelation in HN44 and HN65. However，HＲS was significantly positive correlated with T-AOC in HN44 and HN65，in addition，the T-AOC and POD activity，SASC and POD activity，HＲS and CAT activity presented extremely remarkable positivecorrelation in drought resistant varieties HN44，while the sensitive varieties HN65 T-AOC and POD activity had significantpositive correlation，but the SASC and POD activity，HＲS and CAT activity were positively correlated，but there was not significantdifferent. There was significant positive correlation between SASC and SOD activity in HN44，but there was extremelyremarkable positive correlation in HN65. The degree of correlation between antioxidant enzymes and antioxidant capacity inHN44 is higher than that of sensitive HN65. Thus we concluded that drought resistant soybean varieties had strong antioxidantenzyme activities and antioxidant capacity.

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Last Update: 2016-08-22