Johnsongrass mosaic virus Contributes to Maize Lethal Necrosis in East Africa
| Autor: | Saranga Wijeratne, Theodore Asiimwe, Andrew Kiggundu, Deogracious Massawe, Margaret G. Redinbaugh, Lucy R. Stewart, Charles L. Niblett, Kristen Willie |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Potyvirus Plant Science Polymerase Chain Reaction Zea mays 01 natural sciences Virus Crop 03 medical and health sciences parasitic diseases medicine Plant Diseases biology food and beverages Maize dwarf mosaic virus Africa Eastern biology.organism_classification Johnsongrass mosaic virus medicine.disease Virology Titer 030104 developmental biology Sugarcane mosaic virus Coinfection Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Plant Disease. 101:1455-1462 |
| ISSN: | 1943-7692 0191-2917 |
| Popis: | Maize lethal necrosis (MLN), a severe virus disease of maize, has emerged in East Africa in recent years with devastating effects on production and food security where maize is a staple subsistence crop. In extensive surveys of MLN-symptomatic plants in East Africa, sequences of Johnsongrass mosaic virus (JGMV) were identified in Uganda, Kenya, Rwanda, and Tanzania. The East African JGMV is distinct from previously reported isolates and infects maize, sorghum, and Johnsongrass but not wheat or oat. This isolate causes MLN in coinfection with Maize chlorotic mottle virus (MCMV), as reported for other potyviruses, and was present in MLN-symptomatic plants in which the major East African potyvirus, Sugarcane mosaic virus (SCMV), was not detected. Virus titers were compared in single and coinfections by quantitative reverse transcription-polymerase chain reaction. MCMV titer increased in coinfected plants whereas SCMV, Maize dwarf mosaic virus, and JGMV titers were unchanged compared with single infections at 11 days postinoculation. Together, these results demonstrate the presence of an East African JGMV that contributes to MLN in the region. |
| Databáze: | OpenAIRE |
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