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2000•Unpublished venueRequires access

Effect of Salicylic Acid on Chilling Resistance of Cucumber Seedlings

Pang Jin

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Abstract

Chilling resistance of cucumber(Cucumis Sativus L.)pre treated with salicylic acid(SA)was measured,activities of the membrane protective enzymes and content of superoxide anion(O 2 .- )were also determined. Resistance of chilling increased much more after SA pre treated,and both the wilting rate and the death rate decreased.3 days after SA pre treatment,contents of malondialdehyde(MDA)and O 2 .- decreased,activities of peroxidase(POD) and super oxidase(SOD)increased,that of catalase(CAT) decreased.After chilling treatment,contents of MDA and O 2 .- increased less in seedings of SA pre treated than that in seedlings of SA non pretreated.And activities of the POD,SOD and CAT were higher in SA pretreated seedlings than that in SA non pretreated seedings.It indicated that activities of membrane protective enzymes kept higher were the main cause to chilling resistance of SA pretreated cucumber.

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What this paper is about

Chilling resistance of cucumber(Cucumis Sativus L.)pre treated with salicylic acid(SA)was measured,activities of the membrane protective enzymes and content of superoxide anion(O 2 .- )were also determined. Resistance of chilling increased much more after SA pre treated,and both the wilting rate and the death rate decreased.3 days after SA pre treatment,contents of malondialdehyde(MDA)and O 2 .- decreased,activities of peroxidase(POD) and super oxidase(SOD)increased,that of catalase(CAT) decreased.After chilling treatment,contents of MDA and O 2 .- increased less in seedings of SA pre treated than that in seedlings of SA non pretreated.And activities of the POD,SOD and CAT were higher in SA pretreated seedlings than that in SA non pretreated seedings.It indicated that activities of membrane protective enzymes kept higher were the main cause to chilling resistance of SA pretreated cucumber.

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Available abstract

Chilling resistance of cucumber(Cucumis Sativus L.)pre treated with salicylic acid(SA)was measured,activities of the membrane protective enzymes and content of superoxide anion(O 2 .- )were also determined. Resistance of chilling increased much more after SA pre treated,and both the wilting rate and the death rate decreased.3 days after SA pre treatment,contents of malondialdehyde(MDA)and O 2 .- decreased,activities of peroxidase(POD) and super oxidase(SOD)increased,that of catalase(CAT) decreased.After chilling treatment,contents of MDA and O 2 .- increased less in seedings of SA pre treated than that in seedlings of SA non pretreated.And activities of the POD,SOD and CAT were higher in SA pretreated seedlings than that in SA non pretreated seedings.It indicated that activities of membrane protective enzymes kept higher were the main cause to chilling resistance of SA pretreated cucumber.

Key concepts: Salicylic acid, Cucumis, Malondialdehyde, Catalase, Wilting, Peroxidase, Chemistry, Point of delivery

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