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Effects of temperature stress on membrane protective system of cucumber seedlings

Ma De

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Abstract

Temperature stress caused cucumber membrane lipid peroxidation. After treatment of chilling or heat,malondialdehyde (MDA) contents and production rates of superoxide anion radicals (O -· 2) in the leaves increased.And those were negative correlation with resistance to the stress.Both ascorbic acid (AsA) content and activities of \{peroxidase\} (POD) and catalase (CAT) decreased after 2 days treatment.Superoxide dismutase (SOD) activities of lines with high resistance to chilling increased after chilling stress,and those of the lines with low resistance decreased.SOD activity decreased after heat treatment.

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What this paper is about

Temperature stress caused cucumber membrane lipid peroxidation. After treatment of chilling or heat,malondialdehyde (MDA) contents and production rates of superoxide anion radicals (O -· 2) in the leaves increased.And those were negative correlation with resistance to the stress.Both ascorbic acid (AsA) content and activities of \{peroxidase\} (POD) and catalase (CAT) decreased after 2 days treatment.Superoxide dismutase (SOD) activities of lines with high resistance to chilling increased after chilling stress,and those of the lines with low resistance decreased.SOD activity decreased after heat treatment.

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Available abstract

Temperature stress caused cucumber membrane lipid peroxidation. After treatment of chilling or heat,malondialdehyde (MDA) contents and production rates of superoxide anion radicals (O -· 2) in the leaves increased.And those were negative correlation with resistance to the stress.Both ascorbic acid (AsA) content and activities of \{peroxidase\} (POD) and catalase (CAT) decreased after 2 days treatment.Superoxide dismutase (SOD) activities of lines with high resistance to chilling increased after chilling stress,and those of the lines with low resistance decreased.SOD activity decreased after heat treatment.

Key concepts: Malondialdehyde, Superoxide dismutase, Catalase, Peroxidase, Chemistry, Point of delivery, Lipid peroxidation, Superoxide

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