馬鈴薯バイラス病の免疫學的研究 : 第2報 所謂健全馬鈴薯におけるXバイラスの檢出
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概要
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From July to September of 1949 apparentlo healthy potato plants in various districts of Hokkaido were examined for potato virus X by serological tests and inoculation experiments. The tubers obtained from thirteen more localities of Hokkaido were later grown in the greenhouse and the plants were examined by the same methods during the months of February and March of 1950. The following are the results of experiments. In spite of a healthy appearance, the examined plants of the Irish Cobbler, Benimaru and Green Mountain were found to be affected as much as from 94 to 100 % with potato virus X. It is worthy of note that the first two varieties are the most widely grown in Hokkaido. The virus was found in 50 % and 83.3 % plants of the varieties Norin No. 1 and No. 2, respectively and the affected plants were fewer in numer in 5 varieties of the Shima Line which amount to 20 % in average. Another sixteen varieties tested showed a relatively high infection of 75 % in average. The virus was found in only 3.8 % of the plants raised from seed and it is probable that the newly bred varieties areal most free from virus for a few years. In most of the materials examined, the virus was found more frequently in the leaves than in the tubers. In the defection of the virus X, the precipitin reaction is more valuable than the inoculation experiment, because the former is more sensitive and the reaction occurs immediately. Unfortunately, the complement fixation is not quite so sensitive '1?o the present material, as the precipitin reaction owing to its strong anti-complementary properties. The slide flocculation method is also highly sensitive, but the precipitin reaction is considered to be more suitable, as it gives a more accurate result.
- 日本植物病理学会の論文
- 1951-04-20