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2007•Acta Agriculturae Boreali-SinicaRequires access

Effects of Heat Stress on Several Physiological and Biochemical Indexes of Wheat

Lanhao Liu

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Abstract

Under the condition of high temperature(22℃(CK),32,36,40℃)and the atmospheric relative humidity was 40%,physiological and biochemical indexes including the chlorophyll content,the Superoxide dismutase(SOD) activity,the Malondialdehyde(MDA) content and the soluble sugar content were studied by collecting the first leaves of wheat Yannong 19 when the wheat is in double leaves period.As the result shows:with the extension of stress,the content of chlorophyll drops quickly,furthermore,with the rising of temperature,the rate of degradation of chlorophyll will increase.Total activity of SOD and the content of MDA rise first then drop,while the soluble sugar content rises all along.

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What this paper is about

Under the condition of high temperature(22℃(CK),32,36,40℃)and the atmospheric relative humidity was 40%,physiological and biochemical indexes including the chlorophyll content,the Superoxide dismutase(SOD) activity,the Malondialdehyde(MDA) content and the soluble sugar content were studied by collecting the first leaves of wheat Yannong 19 when the wheat is in double leaves period.As the result shows:with the extension of stress,the content of chlorophyll drops quickly,furthermore,with the rising of temperature,the rate of degradation of chlorophyll will increase.Total activity of SOD and the content of MDA rise first then drop,while the soluble sugar content rises all along.

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Available abstract

Under the condition of high temperature(22℃(CK),32,36,40℃)and the atmospheric relative humidity was 40%,physiological and biochemical indexes including the chlorophyll content,the Superoxide dismutase(SOD) activity,the Malondialdehyde(MDA) content and the soluble sugar content were studied by collecting the first leaves of wheat Yannong 19 when the wheat is in double leaves period.As the result shows:with the extension of stress,the content of chlorophyll drops quickly,furthermore,with the rising of temperature,the rate of degradation of chlorophyll will increase.Total activity of SOD and the content of MDA rise first then drop,while the soluble sugar content rises all along.

Key concepts: Malondialdehyde, Sugar, Chemistry, Superoxide dismutase, Chlorophyll, Food science, Relative humidity, Horticulture

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