ビワがんしゅ病に関する研究第2報 : ビワがんしゅ病菌の色素産生性と病原性による系統類別

概要

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One hundred and nine isolates of Pseudomonas eriobotryae (Takimoto) Dowson from canker infected loquat plants (Eriobotrya japonica Lind.) collected from various localities of Japan were classified into three strains on the basis of their pigment producibility on PSA medium and pathogenicity to leaves (mesophyll) of loquat plant as follows: Strain A: Pigment not produced and not pathogenic to leaves. Strain B: Pigment not produced and pathogenic to leaves. Strain C: Pigment produced and not pathogenic to leaves. The three strains differed each other in their distribution patterns corresponding with loquat cultivars. Strains A and C were widely distributed in Japan, while strain B was isolated only from leaves of the cultivar Mogi intensively cultivated in Nagasaki Prefecture. From the results of needle-prick inoculation tests, it was elucidated that the pethogenicity of each strain seems to be correlated with its origin. Strains A and C were pathogenic only to twig of both cultivars, Mogi and Tanaka, and ingeneral, the former was more virulent to the cultivar Mogi than to Tanaka while the latter did in the opposite way. Strain B was pathogenic to twigs and leaves of both cultivars, showing a higher virulence to the cultivar Mogi.
日本植物病理学会の論文
1978-01-25