Bumblebee Venom Serine Protease Increases Fungal Insecticidal Virulence by Inducing Insect MelanizationReport as inadecuate




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Insect-killing entomopathogenic fungi have high potential for controlling agriculturally harmful pests. However, their pathogenicity is slow, and this is one reason for their poor acceptance as a fungal insecticide. The expression of bumblebee, Bombus ignitus, venom serine protease VSP by Beauveria bassiana ERL1170 induced melanization of yellow spotted longicorn beetles Psacothea hilaris as an over-reactive immune response, and caused substantially earlier mortality in beet armyworm Spodopetra exigua larvae when compared to the wild type. No fungal outgrowth or sporulation was observed on the melanized insects, thus suggesting a self-restriction of the dispersal of the genetically modified fungus in the environment. The research is the first use of a multi-functional bumblebee VSP to significantly increase the speed of fungal pathogenicity, while minimizing the dispersal of the fungal transformant in the environment.



Author: Jae Su Kim, Jae Young Choi, Joo Hyun Lee, Jong Bin Park, Zhenli Fu, Qin Liu, Xueying Tao, Byung Rae Jin, Margaret Skinner, Bruce

Source: http://plos.srce.hr/



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