侵入阻害剤処理イネいもち病菌およびメラニン欠損変異株のメラニン前駆体による付着器侵入能の回復

DOI NDLデジタルコレクション 日本農学文献記事索引 Web Site Web Site 被引用文献3件
  • 千田 常明
    Kureha Chemical Industry Co., Ltd., Nishiki Research Laboratories
  • SISLER Hugh D.
    Department of Botany, University of Maryland, College Park

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タイトル別名
  • Restoration of Appressorial Penetration Ability by Melanin Precursors in <i>Pyricularia oryzae</i> Treated with Antipenetrants and in Melanin-Deficient Mutants
  • 侵入阻害剤処理イネいもち病菌およびメラニン欠損変異株のメラニン前駆体による付着器侵入能の回復〔英文〕
  • シンニュウ ソガイザイ ショリ イネ イモチビョウキン オヨビ メラニン ケッ

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抄録

The capacity of Pyricularia oryzae appressoria to penetrate onion epidermal walls was lost in an albino mutant or in wild type strains treated with melanin biosynthesis inhibitors, cerulenin, fthalide and tricyclazole. Melanization and penetration ability of cerulenin treated wild type or untreated albino mutant appressoria were restored with scytalone or 1, 8-dihydroxynaphthalene (1, 8-DHN). Fthalide or tricyclazole nullified the restoration by scytalone, but not by 1, 8-DHN. Penetration ability of wild type appressoria treated with 0.1μg/ml of fthalide or tricyclazole was restored by 1, 8-DHN, but was not well restored in appressoria treated with 1 or 10μg/ml of these inhibitors unless cerulenin was also present. This investigation indicates that blocking of the melanin biosynthesis pathway by fthalide or tricyclazole leads to two mechanisms of antipenetrant action (1) interference with melanin synthesis (2) accumulation of inhibitory metabolites. The latter mechanism, which may operate concomitantly with former, is nullified in the presence of cerulenin.

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