Transmission characteristics of Southern rice black-streaked dwarf virus by rice planthoppers |
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| Institution: | 1. Laboratory of Genetics and Functional Genomics, Regional Center for Genomic Studies, Faculty of Exact Sciences, National University of La Plata, Bvd 120 y 62, 1900, La Plata, Buenos Aires, Argentina;2. Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, bloco D, Prédio do CCS, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil;3. Molecular Developmental Physiology and Signal Transduction, Division of Animal Physiology and Neurobiology, Zoological Institute, K.U. Leuven, Leuven, Belgium;4. Centre of Experimental and Applied Endocrinology, National University of La Plata, School of Medicine, 60 Street y 120, 1900, La Plata, Buenos Aires, Argentina;1. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;2. Department of Molecular Genetics, Center for Applied Plant Sciences, Center for RNA Biology, and Infectious Diseases Institute, Ohio State University, Columbus, OH 43210, USA;3. State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China;1. Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Box 102, Sundsvägen 14, 23053, Alnarp, Sweden;2. Neurobiology/Ethology, Department of Biology, Philipps University Marburg, Karl-von-Frisch-Straße 8, 35043, Marburg, Germany;3. Center for Functional and Comparative Insect Genomics, Department of Biology, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark;1. State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Province Key Laboratory of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China;2. Key Laboratory of Biopesticide and Chemical Biology of Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China;3. College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China;4. College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China |
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| Abstract: | Southern rice black-streaked dwarf virus (SRBSDV) is a recently proposed distinct species in the genus Fijivirus, family Reoviridae. During the past decade, SRBSDV has spread throughout southern China and northern Vietnam, and has become one of the greatest threats to rice production in these regions. We evaluated three common planthopper species affecting rice: white-backed planthopper (WBPH, Sogatella furcifera), brown planthopper (BPH, Nilaparvata lugens) and small brown planthopper (SBPH, Laodelphax striatellus) to determine their virus transmission abilities. It was confirmed that WBPH was an efficient persistent-transmitting vector for SRBSDV. Neither BPH nor SBPH were viral vectors, although a small proportion (3.7%) of tested SBPH acquired the virus from diseased rice. We characterized the virus transmission properties of WBPH. 83% of the tested insects fed on virus-infected rice plants became viruliferous. The minimum virus acquisition and inoculation access periods were 5 and 30 min, respectively, for both WBPH nymphs and adults. The circulative transmission periods of the virus in WBPH ranged from 6 to 14 days, and most viruliferous individuals transmitted the virus in intermittent periods ranging from 2 to 6 days. A single individual of WBPH could infect 8–25 rice plants with the virus in a 5-day period. WBPH could transmit SRBSDV from rice to maize seedlings, but it was barely able to acquire the virus from infected maize. These results improve our understanding of the epidemiology of SRBSDV, and will be useful for development of disease control strategies. |
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