Study on the Changes of Polyphenol Oxidase in Soybean Varieties Leaves Infected by Cercospora sojina Hara

doi:10.3321/j.issn:1000-7091.2006.05.022

Abstract

Abstract: The polyphenol oxidase(PPO) activity in leaves of soybean varieties with different resistance to frog-eye leaf spot inoculated with 10 races of Cercospora sojina Hara was measured and the relationship between the changes of PPO activities in leaves and varieties resistance was discussed.The results showed that the changes of PPO activity in resistant varieties leaves increased at various time after inoculated with most of races of Cercospora sojina Hara,but that of susceptible varieties decreased.The PPO activities in leaves of all varieties tested increased.Therefore,the changes of PPO activity in varieties leaves can be a biochemical marker for identification of soybean resistance to frog-eye leaf spot.

Key words: Soybean, Cercospora sojina Hara, Polyphenol oxidase

CLC Number:

S565.1

ZHANG Li-juan, DU Jin-zhe, YANG Qing-kai. Study on the Changes of Polyphenol Oxidase in Soybean Varieties Leaves Infected by Cercospora sojina Hara[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(5): 91-95. doi: 10.3321/j.issn:1000-7091.2006.05.022.

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