Volume 10 Part 1 Article 29
Title: Influence of Bacterial Metabolites on the Growth of Agaricus bisporus in Submerged Cultures
Authors: A. Grappelli, I. Cacciari, D. Lippi and W. Pietrosanti
It is well known that some microorganisms influence the growth of mycelium and the fructification of mushrooms (Curto, Favilli, 1971; Eger, 1972; Giovannozzi et al., 1976; Hayes et al., 1969; Nair and Fahy, 1976; Olivier and Guillaumes, 1976; Park and Agnihotri, 1969; Visscher, 1975). In our previous researches, we evidenced in an Arthrobacter strain the ability to produce phythormones-like substances (Grappelli et al., 1972; Grappelli and Pietrosanti, 1975) and the stimulatory effect of these microorganism metabolites on sporophore formation of Agaricus bisporus in a natural environment (Giovannozzi et al., 1976). During this study (Giovannozzi et al., 1976), it was also observed that the bacterial inoculum in the compost largely stimulated the growth of the mycelium as compared with the uninoculated control.
For many years much interest has been devoted to cultivate mushroom mycelium in liquid media and to study physical and cultural factors that regulate the growth (Dijkstra et al., 1972; Szabo et al., 1972). Therefore in the present study, to get further insight into the influence of Arthrobacter giacomelloi on the growth of Agaricus bisporus mycelium, we cultured the fungus in submerged cultures in different media supplemented with bacterial metabolites.
Since our previous results indicated that the stimulatory effect could be due to indolacetic acid we also cultured our Arthrobacter strain in the basal medium supplemented with different amounts of tryptophan, that is known to be a precursor of IAA.Please login to download the PDF for this proceeding.