サンショウ胴枯病を起こす Nectria elegans と Hypomyces solani との比較

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The diagnosis of the trunk blight fungus of Xanthoxylum piperitum, Nectria elegans Yamamoto et Maeda, is as follows. Perithecia caespitose, superficial, astromate or hardly stromate, ovoid, apexpapillate, minutely ostiolate, outer wall irregularly warted, brightly reddish orange to red, 180〜300μdiam., 280〜390μheigh, perithecial wall 40〜50μ wide; asci clavate-cylindrical, apex obtuse or rounded, pedicellate, 8-spored, 80〜106×8〜11μ; ascospores ellipsoid, ends roundd, one-septate, smooth, hyaline, 9〜14×4.5〜6.5μ. Conidial stage, Fusarium elegans Yamamoto et Maeda, macroconidia on sporodochia falcate, slightly curved, apex subacute, pedicellate, 1-6-septate, mostly 3-5-septate, 16〜75×3〜5.5μ,mostly 29〜63×3.5〜5.5μ; microconidia in false heads, ellipsoid or subcylindrical, rarely slightly curved, continuous, rarely one-septate, hyaline, 6〜16×2.5〜5μ; chlamydospores terminal or intercalary, solitary or catenulate, 7〜11×5.5〜9.5μ; sclerotia sperse, globose to subglo-bose, cyano-black, 60-125×50〜120μ. The diagnosis of the saprogenous fungus on rotting potatoes, Nectriopsis solani (Rke. et Berth.) Booth=Hypomyces solani Rke. et Berth., is as follows. Perithecia gregarious, globose to subglobose, with a conical beak fringed with a short collar of hyphal tips, dark red, smooth-walled, 270〜400μ diam., perithecial wall 30〜36μ wide; asci clavate, apex rounded, 8-spored, 80〜98×10〜12μ; ascospores ellipsoid, one-septate, verrucose, light brown, 14〜17×7〜10μ. Conidial stage, Fusarium cuneiforne Sherb., macroconidia fusoid, sometimes pedicellate, 3-septate, hyaline, 24〜35×5〜8μ; microconidia absent; chlamydospores terminal or intercalary, solitary or catenulate, globose, thickwalled, 10〜12μ diam. Nectria elegans Yamamoto et Maeda and Nectriopsis solani (Rke. et Berth.) Booth mentioned above are difierent from each other in morphological characteristic as well as parasitism, which indicates that they are distinct species. However, the former fungus was mistakenly identified by Sakurai and Matuo as Hypomyces solani Rke. et Berth. emend Snyder et Hansen, and also named erroneously Hypomyces solani f. xanthoxyli Sakurai et Matuo (Fusarium solani f. xanthoxyli Sakurai et Matuo) by its pathogenicity.
日本植物病理学会の論文
1961-12-25

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山本和太郎
兵庫農科大学

サンショウ胴枯病を起こす Nectria elegans と Hypomyces solani との比較

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