Interspecific Allelopathy of Houttuynia cordata and Potato
Allelochemical 1-decanol released by intercropping Houttuynia cordata exhibited significant nematocidal activity against potato cyst nematodes in potato both in vivo and in vitro by damaging surface structure, inducing cell apoptosis, and disrupting oxidative stress balance in nematodes. Multiple-omics analyses revealed that 1-decanol induced reallocating resources to growth by suppressing defense metabolism of potato, and inhibited harmful pathogens and enhanced beneficial functional microbiota in soils. Resultantly, yield of potato was effectively promoted by intercropping of H. cordata under infection of nematodes.