Effects of light and inhibitors of photosynthesis and respiration on the multiplication of tobacco mosaic virus in tobacco nicotiana tabacum cultivar xanthi protoplasts

Kano, H.

Plant and Cell Physiology 26(7): 1241-1250


ISSN/ISBN: 0032-0781
Accession: 005311858

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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 10-5 M 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.