Cross-protection between strains of apple mosaic virus

CROSS-PROTECTION BETWEEN DIFFERENT PATHOTYPES OF Pepino mosaic virus REPRESENTING CHILEAN 2 GENOTYPE

Viral cross-protection in plants is a phenomenon, where a mild virus isolate can protect plants against damage caused by a severe challenge isolate of the same virus. It has been used on a large scale in cases where no resistant plants are available. We examined differences in cross-protection between pathotypes of Pepino mosaic virus representing Chilean 2 genotype. The potential of a mild Pep...

Cross-protection among strains of barley yellow dwarf virus.

ELISA, cDNA dot blot hybridization and transmission by vector aphids were used to investigate the occurrence and degree of cross-protection produced in oat plants by virus isolates representing five strains or serotypes of barley yellow dwarf virus, namely PAV, MAV, SGV, RPV and RMV. Generally, the degree of cross-protection was positively correlated with the serological relatedness between the...

Comparison of barley stripe mosaic virus strains.

BSMV (barley stripe mosaic virus) particles were obtained in a pure state from infected host plant tissues of Hordeum vulgare. The three genomic parities (alpha, beta and gamma) were amplified by PCR using specific primers for each particle; each was cloned. Partial sequence of the alpha, beta and gamma segments was determined for the Egyptian isolate of barley stripe mosaic virus (BSMV AE1). A...

Study of resistance to cucumber mosaic virus watermelon mosaic virus and zucchini yellow mosaic virus in melon cultivars

The action of carboxypeptidase on strains of tobacco mosaic virus.

In studies on the chemistry of virus mutation, thirteen strains of tobacco mosaic virus (TMV) have been characterized with respect to their protein and nucleic acid constituents (14). A possible chemical basis for virus mutation was provided by the finding that mutant strains of TMV can differ in amino acid content, whereas they seem not to differ in the composition of their nucleic acids. Howe...