December
2014
, Volume
98
, Number
12
Pages
1,661
-
1,665
Authors
Katia Morales, United States Department of Agriculture–Agricultural Research Service (USDA-ARS) Corn, Soybean, and Wheat Quality Research Unit, Ohio Agricultural Research and Development Center, Wooster, OH;
Jose Luis Zambrano, Instituto Nacional Autónomo de Investigaciones Agropecuarias, INIAP, Programa Nacional de Maíz, Quito, Ecuador; and Ohio State University Department of Plant Pathology, Ohio Agricultural Research and Development Center, Wooster; and
Lucy R. Stewart, USDA-ARS Corn, Soybean, and Wheat Quality Research Unit and Ohio State University Department of Plant Pathology, Ohio Agricultural Research and Development Center
Affiliations
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Accepted for publication 24 April 2014.
Abstract
Abstract
Two major maize viruses have been reported in the United States: Maize dwarf mosaic virus (MDMV) and Maize chlorotic dwarf virus (MCDV). These viruses co-occur in regions where maize is grown, such that co-infections are likely. Co-infection of different strains of MCDV is also observed, and a synergistic enhancement of symptoms in co-infected plants was previously reported. Here, we examined the impact of co-infections of two strains of MCDV (MCDV-S and MCDV-M1, severe and mild, respectively), and co-infections of MCDV and MDMV in the sweet corn hybrid ‘Spirit’ in greenhouse experiments. Quantitative plant growth and development parameters were measured and virus accumulation was measured by reverse-transcriptase quantitative polymerase chain reaction. Virus symptoms were enhanced and plants showed no recovery over time in co-infections of MDMV-OH and MCDV-S but virus titers and quantitative growth parameters did not indicate synergy in co-infected plants. MCDV-M1 co-infections with either MDMV-OH or MCDV-S did not show symptom enhancement or evidence of synergism.
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ArticleCopyright
This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 2014.
