Concentration of Maize Chlorotic Mottle Virus Increased in Mixed Infections with Maize Dwarf Mosaic Virus, Strain B

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Abstract
The concentration of maize chlorotic mottle virus (MCMV) was up to 5.4 times higher in plants [Zea mays] infected with both MCMV and maize dwarf mosaic virus, strain B (MDMV-B), than in plants infected with MCMV only. The concentration of MDMV-B was the same in doubly and singly infected plants. Plants infected with both viruses had a reduced level of chlorophyll and a lower than normal ratio of chloroplast to cytoplasmic rRNA. Purified MCMV had an extinction coefficient of 6.7 cm2 mg-1 at 260 nm, an absorption maximum at 258 nm, minimum at 240 nm, and 25% RNA.