Effect of Salicylic Acid on Chilling Resistance of Cucumber Seedlings

doi:10.3321/j.issn:1000-7091.2000.01.023

Abstract

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(O2.-)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 O2.-decreased,activities of peroxidase(POD) and super oxidase(SOD)increased,that of catalase(CAT) decreased.After chilling treatment,contents of MDA and O2.-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 words: Cucumber seedling, Chilling, Salicylic acid

CLC Number:

S642.201

PANG Jinan, MA Dehua, HUO Zhenrong, LI Shuju. Effect of Salicylic Acid on Chilling Resistance of Cucumber Seedlings[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2000, 15(1): 112-115. doi: 10.3321/j.issn:1000-7091.2000.01.023.

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