Studies on the intraspecific groups in Fusarium solani

Abstract

The differentiation in utilization of carbon sources among the intraspecific groups of Fusarium solani was studied.Six forms and two races of Fusarium solani, i.e. f. cucurbitae, f. mori, f. xanthoxyli, f. phaseoli, f. pisi, f. radicicola race 1 and f. radicicola race 2 were used for the experiments.Of 44 carbon compounds tested, l-arabinose, d-xylose, d-glucose, d-mannose, d-galactose, d-fructote, l-rhamnose, maltose, sucrose, d-raffinose, dextrine, starch, inulin, pectin, ethanol and gluconate were utilizable for all the forms and races used. But acetone, methanol, adonitol, cyclohexanol, oxalate, adipate and maleate were not utilized or utilized only a little by all forms and races.The utilization of lactose, gum arabic, ethylene glycol, glycerol, erythritol, mannitol, sorbitol, dulcitol, inositol, malonate, succinate, fumarate, lactate, malate, tartrate, citrate and pyruvate was different among the intraspecific groups. γ group (f. radicicola race 1) utilized all of these compounds, and β group (f. pisi and f. radicicola race 2) utilized these compounds except citrate. The availabe kinds of carbon sources for α (f. cucurbitae, f. mori, and f. xanthoxyli) and δ (f. phaseoli) groups were less than the above mentioned kinds for γ and β groups, and the difference between α and δ group was recognlized in their ability to utilize tartrate.l-Sorbose, cellulose, n-propanol and n-butanol were utilizable for some strains tested, but the utilization of them did not correlate with the differentiation of the intraspecific groups.