ホウレンソウならびに家畜ビートの萎黄株から分離されたテンサイ萎黄ウイルスおよびテンサイ西部萎黄ウイルス

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Yellowing diseases of spinach (Stinacia oleracea) and fodder beet (Beta vulgaris Var. rapa) were found to occur in Kanto area. The diseases were shown to be caused by beet yellows virus (BYV) or beet western yellows virus (BWYV). BYV was not transmitted by sap inoculation, but was transmitted from diseased fodder beet to spinach, Swiss chard (B. vulgaris var. cicla), and three other plants by Myzus Persicae in a semi-persistent manner. Infected plants of spinach and Swiss chard showed vein-clearing on younger leaves and yellowing on older ones. In negatively stained preparations, BYV particles were very flexuous rods of approximately 12×1,450 nm. They showed helical symmetry with a pitch of 3.7 nm. Typical phloem necrosis was usually seen in thin sections of BYV-infected leaves of fodder beet and Swiss chard. BYV particles were observed only in phloem elements. Characteristic vesicles were also observed in these cells. BWYV was not mechanically transmitted but was transmitted by M. persicae in a persistent manner. Infected plants of spinach and Swiss chard showed mild yellowing on older leaves, but no vein-clearing on younger ones. In negatively stained preparations, BWYV particles were polyhedrons of approximately 27 nm in diameter. In thin sections of BWYV-infected leaves of spinach, the virus particles existed singly or as amorphous, sometimes crystalline, aggregates in degenerated cytoplasm and vacuoles of phloem cells. BWYV could be partially purified by chloroform-butanol treatment followed by differential centrifugaotion. The partially purified preparation was shown to retain high infectivity in membrane-feeding tests using M. Persicae.
日本植物病理学会の論文
1977-01-25

ホウレンソウならびに家畜ビートの萎黄株から分離されたテンサイ萎黄ウイルスおよびテンサイ西部萎黄ウイルス

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