タバコ・モザイク・ウイルスの1変異株, LN27における毒性回復について

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Atomato strain of tobacco mosaic virus, TMV-L, was treated with nitrous acid in the extract of infected tobacco 1eaf, and a mutant was isolated by transferring individua1 1oca1 1esions on Nicotiana glutinosa to tomato seed1ings. An isolate, designated as LN27, caused no symptoms on tomato, but when the extract of such symptomless leaves was inoculated on N. glutinosa, and extracts of single-1esions were further inoculated on tobacco plants, a portion of the tobacco plants developed mosaic symptoms after varying periods. Some of the plants which remained symptomless contained virus systemica11y, whi1e others only in inoculated leaves, or in no parts of the plants. The mosaic symptoms deve1oped on these plants were apparently similar to those caused by the parent virus TMV-L. Lesion productivities of the viruses contained in individua1 1esions of N. glutinosa were different. The viruses which produced many lesions caused mosaic symptoms on tobacco about 5 days after inoculation. Some of the viruses which produced only a few lesions (2-10 1esions per leaf) caused mosaic symptoms 12-41 days after inoculation, while others caused no symptoms at least during this period. When Xanthi nc tobacco was inoculated with the LN27-infected tomato extract, the leaves of the tobacco showed both distinctly 1arge and smal1 1esions. The viruses from the large lesions caused mosaic symptoms on tomato, while the viruses from the sma11 1esions caused no symptoms for two weeks or more after inoculation, deve1oping symptoms afterwards in a half to a third of them. Inoculation from the tomato which remained symptomless for some time and showed symptoms later gave rise to an increased number of large lesions. It was considered that a part of LN27 somehow recovered its virulence to tobacco and tomato during multip11cation.
日本植物病理学会の論文
1968-09-30

タバコ・モザイク・ウイルスの1変異株, LN27における毒性回復について

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