00228511

open access

Version of Record

ホウセンキン ノ キチナーゼ β 1 3 グルカナーゼ カッセイ ト キュウリ ツルワレビョウ ショキ カンセン ボウシ コウカ ショクブツ ボウエキガク

Chitin-Lytic and β-1, 3-Glucanase Activity of Actinomycetes and Their Effects for Preventing Fusarium-Wilt of Cucumber

Japanese (日本語)

神戸大学農学部研究報告

12(1)

41-48

神戸大学農学部

1976

2006-09-15

本文ファイルは、国立情報学研究所CiNiiより提供されたものです。

Actinomycetes were isolated from soils to which chitin, sea weed (Laminaria sp.), dried mycelium of Fusarium oxysporum f. cucumerinum, compost, rape cake, and peat had been added, and also from untreated soil. About 300 isolates were tested for their antifungal-, chitin-lytic-, hyphal wall-lytic-, and β-1,3-glucanase activities. These were classified into 6 groups according to the combination of antifungal-, chitin-lytic-, and β-1,3-glucanase activities. Several representatives from these groups were tested for their effects on preventing the initial infection of cucumber seedlings by Fusarium oxysporum f. cucumerinum. Only an isolate, N-62,which was isolated from untreated soil and possesses all of the three activities, was effective for preventing the wilt disease for 30 days after planting, whereas other isolates, even though isolated from chitin- or laminarin-enriched soils and possess one or two out of the three activities, were not effective at all or effective for not longer than 23 days. Results suggest that the reported effectiveness of the introduction of chitin and Laminaria-sea weeds into soil for preventing wilt diseases may be due not to a single antagonistic actinomycete species but to the combined activities of not a few microorganisms including bacteria and actinomycetes.

紀要論文