COMPARATIVE STUDIES ON SOME ISOLATES OF TOBACCO MOSAIC VIRUSES

Four isolates of tobacco mosaic virus (TMV) were purified from the egg-plant,pepper,tomato and tobacco plant growing in the suburb of Shang-hai and Guang-Zhou. The results of the comparative studies on the relationships of the se-rology,molecular wight of coat pro-tein sub-unit,amino acid composi-tion as well as ~(125)I-labled peptide mapping of coat protein showed thatthe four isolates are the member or strains of the tobomoviruses with different ~(125)I-peptide mapping of the coat protein from that of the common of TMV and that of the Shang-hai of ribgrass mosaic virus. The autoradiogram of the peptide mapping of the coat protein is useful for the identification of the member or strain of TMV.