著者

岸 国平 田中 彰一

出版者

日本植物病理学会

雑誌

日本植物病理學會報 (ISSN:00319473)

巻号頁・発行日

vol.29, no.3, pp.142-148, 1964-05-30

被引用文献数

1

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1. Twenty-seven species of non-leguminous herbaceous plants known to be susceptible to virus diseases were selected from twelve families including Cruciferae, Chenopodiaceae, Cucurbitaceae, Solanaceae, Compositae, Amarantaceae, and others. They were inoculated with the sap from the young shoots of Satsuma orange affected by Satsuma dwarf. Among them only sesame (Sesamum indicum L.) proved to be susceptible to this disease, showing local lesions on the inoculated leaves, and also vein clearing, vein necrosis, curling and malformation on the upper leaves. 2. Cross inoculations between sesame and Blackeye cowpea or between sesame and Chashiroingen, a variety of kidney bean were positive. Therefore the virus in the infected sesame plants, is apparently the Satsuma dwarf virus which has been transmitted by sap-inoculation to leguminous plants as previously reported by the authors. 3. Sesame proved to be susceptible to Satsuma dwarf virus, but non susceptible to tristeza and vein enation viruses which are commonly carried in Satsuma orange plants. 4. Among three varieties of sesame tested, White sesame (Shiro-goma) was the most susceptible. Brown sesame (Cha-goma) was somewhat less susceptible whereas Black sesame (Kuro-goma) was infected systemically showing no local lesions. 5. No significant difference in susceptibility to the present virus was shown at different growing stages of individual sesame plant. However, plants inoculated at the first or second true leaf stage developed the most distinct symptoms and such young plants proved to be the most suitable indicator for Satsuma dwarf virus. 6. Sesame plants are much more heat-tolerant than most of the Leguminous plants, and the former is useful as an indicator for the present virus even in the midsummer season. 7. When sesame plants were exposed in a higher temperature than 34℃ immediately after inoculation, they usually showed no symptoms, but sometimes systemic infection appeared ten days after inoculation. On the other hand, when the inoculated sesame plants were kept more than eight hours at 25℃, they showed striking symptoms even if they were later exposed to temperature shigher than 36℃. 8. When sesame seedlings were inoculated with the sap from shoots of affected Satsuma orange, adjusted to different pH by McIlvaine buffer, infection was obtained with inocula at pH 5-8, with the optimum at 7-8.