Abstract
A variant of the cucumber mosaic virus (CMV) was isolated. This variant causes yellow mosaic or yellow stripes and deformation and abortion of flowers in gladiola (Gladiolus grandiflorus Hort.) plants cultivated in the states of Puebla and Morelos, Mexico. This particular isolate caused intense yellow mosaic, ring spots, and severe deformation in plants of several species of Solanaceae that were inoculated by mechanical transmission. These symptoms were not caused by other common variants of CMV with which it was compared. The isolates of CMV obtained from gladiola probably belong to a yellow variant of CMV not previously reported in Mexico and which we preliminarily call CMV-Ys (“Yellow strain”). The characterization of this variant of CMV was verified by tests of mechanical transmission to differential and indicator host plants, by electronic microscopy, serology (ELISA and double diffusion in agar), by transmission by insect vectors, and by electrophoretic analysis of double-stranded RNA.
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