Effects of fungal culture filtrates of Verticillium lecanii (Lecanicillium spp.) hybrid strains on Heterodera glycines eggs and juveniles

Journal of Invertebrate Pathology
Ryoji ShinyaMasanori Koike

Abstract

Many nematode-antagonistic fungi produce secondary metabolites and enzymes that demonstrate toxicity against plant-parasitic nematodes. The objective of this study was to evaluate the effects of fungal culture filtrates of Verticillium lecanii hybrid strains on mature eggs, embryonated eggs (eggs fertilized but without development of juveniles), and second-stage juveniles (J2) of Heterodera glycines and to compare these effects with those of their parental strains. The fungal culture filtrates of certain hybrid strains inhibited egg hatch of mature eggs. Furthermore, the fungal culture filtrates of two hybrid strains, AaF23 and AaF42, exhibited high toxicity against embryonated eggs of H. glycines. However, most of the fungal culture filtrates of V. lecanii did not inactivate J2. These results suggested that enzymes or other active compounds produced by the fungal culture filtrates of V. lecanii exhibit activity against specific stages in the H. glycines life cycle. In addition, based on a visual assessment of the morphological changes in eggs caused by filtrates of each strain, there were differences between the hybrid strains and their respective parental strains with regard to the active substances produced by V. lecanii aga...Continue Reading

Citations

Jul 1, 2015·Archives of Microbiology·Neha ChadhaAjit Varma
Aug 21, 2013·Journal of Experimental Botany·R DaneshkhahJ Hofmann
Dec 29, 2020·Mitochondrial DNA. Part B, Resources·Yong-Jie ZhangShu Zhang
Apr 22, 2008·Journal of Invertebrate Pathology·Mark S GoettelJacques Brodeur

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