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- Title
EFFECTS IMPOSED BY EXOGENOUS SALICYLIC ACID ON THE PHYSIOLOGICAL CONDITIONS AND MEMBRANE DAMAGE OF Rhodiola algida SEEDLING UNDER STRESS OF LOW TEMPERATURE.
- Authors
LING-FA MA; SHU-LING HE; FENG-RUI LI; KEN-TIAN ZHAO; JING-JUN YANG; YU WEI CHANG
- Abstract
The study was conducted to investigate the influence of the exogenous salicylic acid (SA) on the physiological and membrane damage in Rhodiola algida seedlings under low temperature stress. With Rhodiola algida seeding as experimental material to study the effects of exogenous SA on three antioxidant enzyme activities (CAT, SOD, POD), malondialdehyde (MDA) content and membrane damage of Rhodiola algida seeding under low temperature of 0oC. The results showed: under the condition of 0°C low temperature stress, Rhodiola algida seedlings leaves, treated with exogenous SA, the activities of antioxidative enzymes such as catalase (CAT), peroxidase (POD) superoxide dismutase (SOD) increased in different degrees compared with the control. However, the content of MDA decreased significantly. Ca2+-ATP and Mg2+-ATP enzyme activity of chloroplast membrane had been enhanced in different degrees. Exogenous SA reducing the membrane lipid oxidation product of MDA by increasing antioxidant enzyme activity and anti-oxidising substance content; and reduced the damage of cell membranes, resulted in improving the tolerance of Rhodiola algida seedlings to chilling stress by enhancing Ca2+-ATP and Mg2+-ATP enzyme activity of chloroplast membrane; concentration of exogenous substances SA that improved cold tolerance of Rhodiola algida was 0.1-0.3 mg/l, and the optimum concentration was 0.3 mg/l.
- Subjects
SALICYLIC acid; SEEDLINGS; LOW temperature (Weather); PLANT physiology; PLANT membranes
- Publication
Oxidation Communications, 2016, Vol 39, Issue 2, p1300
- ISSN
0209-4541
- Publication type
Article