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Effect of Drought Stress on Osmotic Adjustment Substance and Antioxidative Activity of Leymus chinensis(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年23期
Page:
71-75
Research Field:
Publishing date:

Info

Title:
Effect of Drought Stress on Osmotic Adjustment Substance and Antioxidative Activity of Leymus chinensis
Author(s):
ZOU Yuan-dong;HAN Zhen-qin;CHEN Xiu-xin;SHI Jin-chao
Beijing Vocational College of Agricultural,Beijing 102442
Keywords:
Leymus chinensisdrought stresscompletely randomantioxidant enzymes
PACS:
S 543.901
DOI:
-
Abstract:
With Leymus chinensis as experimental material,control was sustainable watering,this test adopted the two factors completely random design.The effect of drought stress on relative water content,osmotic adjustment substance and antioxidant enzymes activity were studied by pot experiment.The results showed that relative water content was decreased with aggravation of drought stress,reached about 20% after 2 weeks.Water retention of leaves was better,and with good drought tolerance.In the condition of natural dehydration the accumulation of MDA was increased gradually,particularly at later stages of drought,and plant was sensitive to drought.Pro content increased with the water stress time.A significant correlation existed between relative water content and Pro content(.R=-0.865,P=0.026<0.05).Accumulation of Pro content was a wound response for plant,and it was independent of drought resistance.Under drought stress soluble protein content increased at first but later decreased.SOD and CAT activity in control were lower than other treatments (P<0.05),and both of them played a common role in preventing drought.POD activity in control was extremely lower than other treatments (P<0.01).

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Last Update: 2014-08-18