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Effect of Drought Stress on Enzymes of Different Soybean Strains(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2009年03期
Page:
445-449
Research Field:
Publishing date:

Info

Title:
Effect of Drought Stress on Enzymes of Different Soybean Strains
Author(s):
GUO Shu-jinLI Gui-quan
Agricultural College,Shanxi Agricultural University,Taigu 030801,Shanxi,China
Keywords:
Soybean strainsEnzymeDrought stressDrought resistance
PACS:
s565.1;s312
DOI:
10.11861/j.issn.1000-9841.2009.03.0445
Abstract:
The objective of this study is to discuss effect of drought stress on changes of enzymes in different soybean strains.Four strains from the same cross were selected,these strains were 73-1(sharp leaves and white flowers),73-2(round leaves and purple flowers),73-3(round leaves and white flowers),73-4(sharp leaves and purple flowers).During seedling and flower-podding periods,two conditions of normal water supply and drought stress were set,and drought-relevant enzyme indexes such as POD,SOD and CAT,were determined.Simultaneously,electrophoresis analysis for SOD isoenzyme and Esterase in the period of flower-podding was conducted.Also,integrated analysis of agronomic traits such as plant weight,plant height,seed quantity,individual seed weight,100-seed weight,and so on were applied.Different strains were comprehensively assessed and their drought-resistant classes were divided by subordinate function value.Activities of POD,SOD,and CAT all increased under drought stress during the flower-podding period.The order of drought-resistance was 73-2>73-1>73-3> 73-4,and the most drought-resistant strains possessed highest enzyme activity.Under drought stress,all strains increase their protective enzyme activity to eliminate internal free radicals,protect integrity of plasmalemma,thus improving their drought resistance.The increasing extent of enzyme activity was distinct in different periods.In addition,activities of enzymes were significantly positively correlated with the values of the drought-resistant subordinate function.Therefore,activities of enzymes are able to be utilized as indexes for evaluating drought resistance.

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Last Update: 2014-09-25