Differential effects of root exudates and extracts from tomato cultivars on Fusarium oxysporum f.sp. lycopersici in relation to their disease reaction

Mandal, N. C.; Sinha, A. K.

Root exudates from 3 cultivars differing in reaction to vascular wilt had differential effects on the pathogen, their in vitro toxicity showing a direct relation to host resistance. Exudate from the susceptible Patharkuchi, which develops severe symptoms and shows extensive vascular colonization by the pathogen, stimulated both spore germination and hyphal growth, whereas that from the resistant Pusa Ruby, showing limited symptoms and restricted colonization, was inhibitory.