The Relation Between the Resistance of the Cucumber Writ and the Activities of Several Enzyme in Defense System

doi:10.7668/hbnxb.2008.03.043

Abstract

Abstract: Using the six different resistant strains of the cucumber to Fusarium oxysporum,this paper studied the activity changes of superoxide dismutase(SOD),peroxidase dismutase(POD),polyphenol oxidase(PPO)and phenylalanine ammonia-lyase(PAL)in leaf tissue.The results showed that the activity of POD,SOD,PPO have two peaks and a single peak in the PAL.The first of the enzyme peak was significantly higher in resistant strains than that in susceptible strains,showing consistency.There was a significant positive correlation between the activity of SOD,PPO and resistance,and a notable positive correlation between the activity of POD,PAL and resistance.

Key words: Wilt disease of cucumber:SOD, POD, PPD, PAL

CLC Number:

S62.2

ZOU Fang-bin, SI Long-ting, LI Xin, WANG Li-li. The Relation Between the Resistance of the Cucumber Writ and the Activities of Several Enzyme in Defense System[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(3): 181-184. doi: 10.7668/hbnxb.2008.03.043.

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