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J Gen Virol 8 (1970), 21-32; DOI 10.1099/0022-1317-8-1-21
© 1970 Society for General Microbiology
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A Comparative Study of Red Clover Vein Mosaic Virus and Some Other Plant Viruses

A. Varma*, A. J. Gibbs and R. D. Woods

Rothamsted Experimental Station, Harpenden, Herts, England

Red clover vein mosaic virus (RCVMV) was compared with other viruses, in particular white clover mosaic virus (WCMV) and clover yellow vein virus (CYVV). All three have filamentous particles, those of RCVMV are 645 nm. long and have a sedimentation coefficient of 160S, those of WCMV are 460 nm. long (119S), and those of CYVV between 700 nm. and 800 nm. long (about 140S). RCVMV and WCMV contain about 6% ribonucleic acid with nucleotide compositions of G31.5, A24.1, C22.7, U21.7 and G15.5, A31.8, C26.9 and U25.7% respectively. RCVMV is distantly serologically related to five viruses of the potato virus S group, CYVV to eight viruses of the potato virus Y group, and WCMV to potato virus X.

RCVMV is photoreactivable; after exposure to ultraviolet radiation, preparations of the virus caused more lesions in Chenopodium amaranticolor when the inoculated plants were kept in the light than in darkness; this is the first virus with seemingly rigid helically constructed particles to show photoreactivation.

* Present address: Division of Mycology and Plant Pathology, Indian Agricultural Research Institute New Delhi, India.

Received 24 October 1969; accepted 25 February 1970.




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Copyright © 1970 by the Society for General Microbiology.