Abstract
Single isolates of 21 ectomycorrhizal fungi of conifers were assessed for their ability to utilize 26 carbon sources. In the absence of added glucose the fungi utilized from 12 to 21 carbon sources showing best growth on D -glucose, D -mannose, fructose, cellobiose, trehalose, sucrose, dextrin, glycogen, starch and pectin. After glucose supplementation fungi showed adaptive growth on 0–11 carbon sources. Pisolithus tinctorius (Pers.) Coker & Couch, Rhizopogon luteolus Fr. and Nordh., R. roseolus (Corda.) T. M. Fr., Thelephora laciniata Pers., T. terrestris (Ehrh.) Fr., Xerocomus subtomentosus (L. ex Fr.) Quel, and five unidentified mycorrhizal fungi of Pinus utilized and grew adaptively on the largest number of carbon sources. It is suggested that the fungi which are the dominant mycorrhiza formers in forest nurseries, together with certain unidentified species common in plantations, are less fastidious in their carbon nutrition than many better known fungi.
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