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Effect of 6-azauracil on infection with tobacco mosaic virus
Authors:Jeanne Dijkstra  J. J. S. van Rensen
Affiliation:(1) Laboratory of Virology, Agricultural University, Wageningen;(2) Present address: Laboratory of Plant Physiological Research, Agricultural University, Wageningen
Abstract:6-Azauracil caused a marked reduction in the number and size of local lesions on excisedNicotiana glutinosa leaves or leaf discs inoculated with tobacco mosaic virus or its nucleic acid. The amount of infectivity recovered from tobacco (N. tabacum lsquoWhite Burleyrsquo) leaf discs floated on the pyrimidine analogue solution and subsequently ground and assayed 24, 48, 72, and 96 h after inoculation with intact virus was reduced in the 24, 48, and 72 h series but reached the same level as that of the water-treated control discs in the 96 h series.By contrast, the amount of infectivity in stripped epidermal tissue ofN. glutinosa leaves inoculated with nucleic acid was not reduced in strips floated on the analogue for 24, 50, and 70 h as compared with water-floated controls. The analogue had no effect on infectivity of the virus in vitro and did not act as an inhibitor of infection.Part of this paper was presented at the International Symposium on Plant Pathology, held in New Delhi from December 27, 1966 till January 1, 1967. A summary will be published in the symposium volume entitled ldquoPlant disease problemsrdquo.
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