|Table of Contents|

Effect of Simulated Drought Stress on Antioxidant Enzyme System of Four Native Species in the Ecotone Between the Minjiang Dry Valley and Mountain Forest(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2010 04
Page:
478-482
Research Field:
xpkx
Publishing date:

Info

Title:
Effect of Simulated Drought Stress on Antioxidant Enzyme System of Four Native Species in the Ecotone Between the Minjiang Dry Valley and Mountain Forest
Author(s):
CAI Haixia WU Fuzhong YANG Wanqin
(Sichuan Key Laboratory of Forestry Ecological Engineering, Sichuan Agricultural University, Ya’an 625014, Sichuan, China)
Keywords:
dry valley ecotone endemic species antioxidant enzyme activities drought stress
CLC:
Q945.78 : Q948.112.3
PACS:
DOI:
10.3724/SP.J.1145.2010.00478
DocumentCode:

Abstract:
To understand the resistibility of plant species in the ecotone between the Minjiang dry valley and mountain forest under drought stress, antioxidant enzyme activities, the contents of Pro and MDA, and the contents of chlorophyll and carotenoids were investigated using 4 native plants (Setaria viridis, Cupressus chengiana, Salix paraqplesia and Hippophae rhamnoides) under different drought stress conditions. Drought stress significantly reduced the contents of chlorophyll and carotenoids, but increased membrane permeability, the contents of Pro and MDA, and antioxidant enzyme activities (POD, SOD and CAT). Compared with C. chengiana and S. paraqplesia, S. viridis and H. rhamnoides showed higher drought-resistibility with higher Chl a/b and Pro contents, and POD, SOD and CAT activities. However, S. paraqplesia showed lower drought-resistibility with lower Chl a/b and Pro contents, and POD, SOD and CAT activities compared with the other species. The results could provide useful scientific evidences to the adaptation of plants with different life-types in ecotone ecosystem. Fig 2, Tab 2, Ref 26

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Last Update: 2010-08-25