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Plant and Cell Physiology, 1985, Vol. 26, No. 7 1241-1249
© 1985

Article

Effects of Light and Inhibitors of Photosynthesis and Respiration on the Multiplication of Tobacco Mosaic Virus in Tobacco Protoplasts

Hiromi Kano

National Institute of Agro-Biological Resources, Tsukuba Science City Yatabe, Ibaraki 305, Japan

The multiplication rate of tobacco mosaic virus (TMV) in tobacco protoplasts in light was several times than in the dark. 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (DCMU) at 10–5M completely antagonized this illumination effect. KCN at 10–4 M and antimycin A at 10–5 M, which prevented the protoplasts from surviving in the dark, did not block TMV multiplication in light. Inhibitor experiments showed that photosynthesis and respiration were indirectly associated with the TMV multiplication. Either of them was found to be necessary for TMV multiplication but neither was indispensable. They play complementary roles in the supply of energy and materials required for virus production.

(Received August 2, 1984; Accepted July 9, 1985)
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