Leafhopper transmits soybean stay-green associated virus to legume plants
Yin, J.; Hu, Z.; Xu, S.; Hong, X.; Qiu, Y.; Cheng, X.; Wang, L.; Sheng, W.; Zhi, H.; Li, K.; Xu, K.
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A novel geminivirus, soybean stay-green associated virus (SoSGV), was previously shown to cause soybean delayed senescence and is associated with the incidences of soybean stay-green syndrome. The transmission methods of SoSGV were not yet understood. We captured insects belonging to 24 distinct species in a soybean field with the SoSGV outbreak and detected the presence of SoSGV only in leafhoppers and bean bugs (Riptortus pedestris). Caged feeding experiments using captured leafhoppers and bean bugs from soybean fields showed that leafhoppers, but not bean bugs, are vectors transmitting SoSGV. The common brown leafhopper (Orosius orientalis) is identified as the dominant leafhopper species and can establish colonies feeding on soybean plants in experimental conditions. An investigation of SoSGV defective DNA revealed that soybean genomic DNA could be inserted into the SoSGV genome, while sequences from wild soybean, red bean, and cowpea were also identified. We further showed that the common brown leafhopper could transmit SoSGV to wild soybean and red bean plants, emphasizing the vector role of the leafhopper in the transmission of SoSGV in the field.
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