we
intended to heterologously expressVHb in P. lilacinusACSS.After optimizing the vgb gene, we fused it with
a selection marker gene nptII, a promoter PgpdA and a terminator TtrpC. The complete expression cassette
PgpdA-nptII-vgb-TtrpC was transferred into P. lilacinus ACSS by Agrobacterium tumefaciens-mediated
transformation. Consequently, we successfully screened an applicable fungus strain PNVT8 which effi-
ciently expressed VHb. The submerged fermentation experiments demonstrated that the expression of
VHb not only increased the production traits of P. lilacinus such as biomass and spore production, but
also improved the beneficial product quality and application value, due to the secretion of more protease
and chitinase. It can be speculated that the recombinant strain harboring vgb gene will have a growth
advantage over the original strain under anaerobic conditions in soil and therefore will possess higher
biocontrol efficiency against plant-parasitic nematodes.