An investigation of chemotaxis in the insect parasitic nematode Heterorhabditis bacteriophora.

摘要: We tested the chemotactic responses of dauer juvenile stages (DJs) insect parasitic nematode Heterorhabditis bacteriophora to a variety compounds that are known be highly attractive or repellent Caenorhabditis elegans. While H. DJs respond alcohols and some aromatic as well host metabolites such uric acid CO2, most notable difference in these two nematodes is unresponsive large number which C. elegans finds attractive. The latter typical by-products bacterial metabolism include aldehydes, esters, ketones short-chain alcohols. long-chain (e.g. 1-heptanol 1-octanol) attractive, strongly attracted 1-heptanol, 1-octanol 1-nonanol find only slightly Parasitic-stage show very weak response volatile molecules Our results suggest that, associated with adoption mode life by Heterorhabditis, there was an adaptive change behaviour infective stages, resulting decreased sensitivity increased towards other insect-specific volatiles possibly also herbivore-induced plant volatiles.