Gray, William D., 1912-||Grosklags, James H.||Lynch, Darrel L.
M.S. (Master of Science)
Department of Biological Sciences
Proximate composition analyses were made on the mycelia and spores of five species of fungi: Linderina pennispora, Aspergillus niger, Spicaria elegans, Penicillium claviforme and Penicillium roqueforti. The crude protein content of the mycelia and spores varied only slightly with the exception of those of Linderina pennispora in which the protein content of the spores was 55 per cent while that of the mycelium was 30 per cent. Caloric values of both mycelia and spores were found to be within the range of 4.1 to 4.6 k cal/g of dried material. Neither spores nor mycelia were consistently higher in caloric value—this varied with the species under examination. Crude lipid determinations indicated a range of 2.7 to 6.9 per cent of the dry weight to be lipid; mycelium of Penicillium roqueforti contained over twice as much lipid as the spores, but the spores of Linderina pennispora contained twice as much lipid as the mycelium. Carbohydrate values ranged from 9.9 to 46.3 per cent. In four of the five species of fungi, the carbohydrate content was higher in the mycelia than in the spores. The concentration of mineral elements in the spores and mycelia varied depending on the particular element in question. The amount of copper present was consistently higher in the spores than in the mycelia. The copper content was determined to be in the range of 36 to 521 micrograms per gram in the spores and 8 to 18 micrograms per gram in the mycelia. Zinc concentrations were higher in the mycelia than in the spores with the exception of Aspergillus niger. The ranges for zinc concentrations Were 162 to 1113 micrograms per gram in the mycelia and 96 to 651 micrograms per gram in the spores of the five species tested. Magnesium analyses again showed no general pattern. The concentration of magnesium was found to be higher in the mycelia than in the spores of all test species with the exception of Linderina pennispora. Concentrations of magnesium were found to range from 854 to 3631 micrograms per gram in the mycelia and from 407 to 974 micrograms per gram in the spores of the species tested. As with magnesium, potassium concentrations were found to vary considerably. The concentrations ranged from 10540 to 32965 micrograms per gram in the mycelia and from 20164 to 38144 micrograms per gram in the spores. Potassium concentrations were found to be higher in the spores than in the mycelia of three of the test species, while the reverse was true of the remaining two test species.
Dalby, David K., "Proximate composition of fungus mycelia and spores" (1972). Graduate Research Theses & Dissertations. 4577.
vii, 30 pages
Northern Illinois University
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