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Your Position :Home->Past Journals Catalog->2008年45 No.6

Relationship between physical and chemical differences of tomato leaf and the resistance to Aculops lycopersici
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Key Words:tomato russet mite, resistance to mite, PPO, POD, ASP
Abstract:

The relationship between the leaf physical and chemical characters of three tomato varieties and tomato russet mites (Aculops lycopersici) was investigated. The results showed that the amount of mites on the multihair plants YZ618 was significantly lower than those on YZ504 and YZ413 with fewer hairs. The distribution of mites was different on three tomato varieties. Fewer mites were found on the upper part of YZ618, and the amount of mites on the upper part of YZ504 was obviously higher than those on the middle and lower part, while the amount of mites on the upper and middle part of YZ413 was higher than that on the lower part. The enzyme activities of polyphenol oxidase (PPO), peroxidase (POD) and ascorbic peroxidase (ASP) in leaves increased after infested by mites, and the miteresistant YZ618 was more sensitively.The correlation analysis indicated that PPO was the miteresistant biochemical factor induced by the mite  infection, and ASP was the original miteresistant biochemical factor. However, there was no significant relationship between SOD and mite-resistance.

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