棉角斑病細菌のバクテリオフアーヂュに關する研究 : II 變異菌とフアーヂュの關係に就て

概要

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Thirty-two colony variants were obtained from the two different strains of Bacterium malvacearum which were isolated from the angular spots of cotton at Taihoku, viz. 9 variants (A-I in fig. 1) from culture strain 427 and 23 variants (A-W in pl. II) from culture strain 450. All the variants derived from the former are resistant to the phage which was isolated from the diseased leaves by MATSUMOTO and HUZIOKA, while any of the latter are susceptible to it, though some what different in susceptibility and size of plaque produced, generally more susceptible variants producing larger plaques (table 6). The plaques produced on the cultures of variants E, J, and M enlarge to a great extent with the increase of the incubation period (table 6). The phage in question proved to beconsisted of at least two elemental phages. The one is active against all the variants, and the other is only active against those except E, J, M, O, and P variants (tables 7-8). The size and number of plaques are more or less decreased with the increase of the amount of bacteria used (table 11). The same is the with the temperature within a certain limit, although in this case the effect is more remarkable on the number of pactues. Resistant strains developed from the phage-bacterial cultures are not apparently different in morphological characters from their original susceptible bacteria.
日本植物病理学会の論文
1938-12-25