TOBACCO MOSAIC TOBAMOVIRUS DOES NOT REQUIRE CONCOMITANT SYNTHESIS OF MOVEMENT PROTEIN DURING VASCULAR TRANSPORT

A tobacco mosaic tobamovirus (TMV) mutant, which is defective in cell-to-cell transport, moved long-distance through parts of grafted plants that do not express TMV movement protein, MP(-), Long-distance movement of the TMV mutant in vascular tissue from MP(-) tobacco was as efficient as wild-type TMV, The data indicate that once in the phloem, presumably the sieve elements, long-distance movement of TMV does not require concomitant synthesis of MP.