FIG 10.

Morphological and metabolic adaptation of wild-type A. oligospora on two media, CMA and PDA. In direct contact with nematodes, the fungus grown on CMA develops more traps than that grown on PDA; in nondirect contact with nematodes, the fungus grown on PDA develops more hyphal fusion than that grown on CMA. The fungus grown on CMA produced an attractant molecule, 2(5H)-furanone, while the fungus grown on PDA produced a nematicide metabolite, 5-methylfuran 2-carbaldehyde, as well as a stimulator, maltol, that increased trap numbers.