ナス土壌伝染性病害における宿主内諸酵素活性と病害診断

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  • The Enzyme Activities in Eggplant Infected with the Soil-borne Diseases and Application to Diagnosis for Diseases.
  • ナス ドジョウ デンセンセイ ビョウガイ ニ オケル シュクシュナイ ショ コ

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The diagnosis at early stages of infection with soil-borne pathogens in eggplant was tried by the measurement of enzyme activities in leaves. The leaves of eggplants were inoculated with Verticillium dahliae, Fusarium oxysporum f. sp. melongenae and Pseudomonas solanacearum and the enzyme activities of peroxidase, polyphenol oxidase, phenylalanine ammonia lyase, β-1, 3-glucanase (Glc), superoxide dismutase (SOD), polygalacturonase, pectin methylesterase and amylase (Amy), were measured. The leaves of eggplant infected with V. dahliae showed higher activities of Glc and Amy than the healthy and the other diseased leaves. The Amy activity of the leaves infected with F. oxysporum was slightly higher than that of healthy leaves, but the difference between the Amy activities of the leaves infected with F. oxysporum and P. solanacearum was not clear. The leaves of eggplant infected with P. solanacearum showed higher activity of SOD. The usefulness of the measurement of enzyme activities for a rapid diagnosis for diseases was discussed.

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