ダウンロード数 : ?
ファイル
言語
日本語
著者
Miyake, Kazuhiro
本田 雄一
野津 幹雄
内容記述(抄録等)
The anti-fungal substance(s) were isolated from the "Sekiguchi lesion" formed on rice cv. Sekiguchi-asahi by Pyricularia oryzae infection. These substance(s) were partially purified by silica gel column chromatography. Although spore germination of P. oryzae was completely inhibited in solution of the anti-fungal substance(s) at concentrations of 0.1-2.5 mg/ml, but that of Bipolaris oryzae was not. When a spore suspension of P. oryzae was inoculated to inner surface of rice leaf-sheaths which had been pre-treated with the solution of 0.5- 2.5 mg/ml of the anti-fungal substance(s) for 24 hr, penetration and hyphal growth were significantly inhibited. The same phenomenon was also observed in B. oryzae infection at the concentration of 0.5 and 1.0 mg/ml of the anti-fungal substance(s). However, phenomena associated with anti-fungal substance-induced resistance such as inhibition of penetration and hyphal growth disappeared within 24 hr after removal of the anti-fungal substance(s). Further, inhibitive effect was not observed in thermal-treated sheaths before the treatment of the anti-fungal substance(s). These results suggest that the anti-fungal substance(s) isolated from the "Sekiguchi lesion" have two biological activities; one is direct effect to the pathogens such as inhibition of spore germination and another is indirect effect to the plants such as induction of disease resistance.
掲載誌名
島根大学農学部研究報告
27
開始ページ
7
終了ページ
14
ISSN
0370940X
発行日
1993-12-20
NCID
AN00108015
出版者
島根大学農学部
出版者別表記
Shimane University, Faculty of Agriculture
資料タイプ
紀要論文
部局
生物資源科学部
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