温州萎縮ウイルスに対する Citrus 属および近縁植物の感受性と病徴

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Seed1ings of 18 Citrus spp., 1 Poncirus sp., 1 Aeglopsis sp., and 7 hybrid varieties were tested for their reaction to the Satsuma dwarf virus (SDV). The tests, conducted under the greenhouse condition (15-30℃), showed that a11 of the seed1ings inoculated were susceptible and induced non-persistent mott1ing, and less frequently, some 1ines of the seed1ings (Table 3, Fig. 4, F and G) were accompanied by crink1ing l-2 months after bud-inoculation. The viru1iferous buds from the respective seed1ings whose fo1iar symptoms had disappeared incited the typical dwarf symptoms upon further transfer to virus-free Satsuma budlings. Mott11ng, being of either flecking or oak-1eaf-1ike pattern, was noticed shortly after inoculation. But there was consistent delay (3 months or more) in the formation of both leaf-bending and cupping (boat and spoon-shape) symptoms on the leaves of Satsuma seed1ings and bud1ings. A 1ime-reactive component, or tristeza virus (TV), was present as a consistently recoverable contaminant from the dwarfed trees in the field. The TV component was successfu11y separated from the SDV component by a prior passage through Poncirus trifoliata seed1ings, which, upon further transfer to West Indian 1ime seed1ings, manifested no 1ime reaction (Table 1 and 2; Fig. 1, B). This finding thus enabled the writer to observe the infectivity of the SDV component by itself to West Indian 1ime, which, otherwise, was too sensitive to the TV component. The inocula containing either SDV by itself or two components, that is, SDV and TV, caused no difference in the symptomatic expression of Satsuma nuce1lar seed1ings and bud1ings (Fig. 2). Out of 7 virus isolates used in this test, there were some noticeable differences in their respective virulence to various nuce11ar seed1ings. It is yet to be determined whether these differences are attributable to the presence of SDV strains or not.
日本植物病理学会の論文
1969-06-30

温州萎縮ウイルスに対する Citrus 属および近縁植物の感受性と病徴

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