|Table of Contents|

Effect of Exogenous SA on Physiological Conditions and Membrane Damage of Rhodiola kirilowii Seedling Under Stress of Low Temperature(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年17
Page:
61-65
Research Field:
Publishing date:

Info

Title:
Effect of Exogenous SA on Physiological Conditions and Membrane Damage of Rhodiola kirilowii Seedling Under Stress of Low Temperature
Author(s):
HE Shuling; MA Lingfa; YANG Jingjun; CHANG Yuwei
(Institute of Alpine Ecosystems,Gansu Normal University for Nationalities，Hezuo，Gansu 747000)
Keywords:
Rhodiola kirilowii; stress of low temperature; exogenous substance; membrane damage; physiological condition
PACS:
-
DOI:
10.11937/bfyy.201517016
Abstract:
Taking Rhodiola kirilowii seedlings as test material，under the low temperature at 0℃，the effect of exogenous SA on activities of three antioxidant enzymes including CAT，SOD and POD，MDA content and membrane damage of Rhodiola kirilowii were studied.The results showed that under stress of low temperature at 0℃，exogenous SA at different concentrations could elevate activities of CAT，POD and SOD in leaves of Rhodiola kirilowii seedling to some extents，decreased MDA content of leaves to some levels and enhanced activities of Ca2+-ATP enzyme and Mg2+-ATP enzyme in the chloroplast membrane at variable degrees.Under the stress of low temperature，exogenous SA would decrease production of MDA which was a kind of membrane lipid peroxidation product，enhance activities of Ca2+-ATP enzyme and Mg2+-ATP enzyme in the chloroplast membrane and ease damage to the cell membrane by enhancing activity of antioxidant enzyme，content of antioxidants and osmolytes，which could improve capabilities of Rhodiola kirilowii seedling to resist low temperature，where the appropriate concentrations of exogenous SA ranged from 0.1 mg/L to 0.3 mg/L and the most appropriate concentration of SA was 0.3 mg/L.

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Last Update: 2015-09-29