<I>Xanthomonas tmnslucens</I> f. sp. <I>hordei</I> Hagborgによるオーチャードグラスの黄枯細菌病
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概要
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In June of 1966, a new bacterial disease was found causing brownish streaks on the foliage of orchardgrass (<I>Dactylis glomeruta</I>L.) in Japan. The causal organism was identified as <I>Xanthomonas translucens</I> f. sp. hordei Hagborg, considering its bacteriological characters, symptom on the leaf-blade showing the characteristic translucency and pathogenic specialization. It is the first time that <I>X. translucens</I> has been found to attack orchardgrass naturally and some of wheatgrasses (<I>Agropyron</I>spp.) artificially.<BR>The bacteriological characters of the pathogen are as follows: Cylindrical rods rounded at ends, Solitary or in pairs; 0.6×1.2-2.4μ in size, motile with a single flagellum; capsulate, Gram negative, no spores, aerobic. Superficial colonies, yellow, round, convex, smooth, shining, opaque, with entire margin. Liquefies gelatin slowly; digests milk slowly without coagulation; nitrates not reduced; hydrogen sulphide and ammonia produced, but not indol or acetoin; starch hydrolysed variable. Acid but no gass produced from arabinose, xylose, glucose, fructose, galactose, mannose, lactose, sucrose and glycerol: neither acid nor gas from rhamnose, maltose, raffinose, starch, inulin, dextrin, mannitol, sorbitol or salicin. Aesculin hydrolysed; oxidase-positive; lipolytic. According to Hugh-Leifsons method, acid produced aerobically from glucose. Optimum temperature 30°C.
- 日本細菌学会の論文