Ob. Hidalgo et al., Phytotoxic effect of culture filtrate from Fusarium subglutinans the causal agent of fusariose of pineapple (Ananas comosus (L.) Merr, EUPHYTICA, 104(2), 1998, pp. 73-77
Two pineapple varieties differing in resistance to fusariose were examined
for the phytotoxic effect of Fusarium subglutinans culture filtrate. The cu
ltivars were Perolera (more resistant to pathovars of Fusarium subglutinans
) and Smooth Cayenne (more susceptible). The phytotoxic effect of culture f
iltrate was assessed in tissue culture pineapple plantlets (by electrolyte
leakage and placing the culture filtrate on wound leaf segments) and callus
(inhibition of growth). Smooth Cayenne proved to be the most sensitive cul
tivar in each test, whereas Perolera showed resistance to the culture filtr
ate and its callus grew in the presence of high concentrations of culture f
iltrate that were completely toxic to Smooth Cayenne. These results show th
at plants can display cellular resistance to the culture filtrate.