Effects of different carboyhydrate sources on the growth of Tuber borchii Vittad. mycelium strains in pure culture

The influence of carbohydrate utilisation on the growth of three strains of Vittad. mycelium (1BO, 17BO and 10RA) in culture was assessed using cultur e media containing glucose (control), mannose or mannitol. Mannose was the best substrate for growth of the strains and this was particularly evident for strain 17BO. Mannitol instead was metabolized only by 10RA and 1BO. In order to explain the different growth trends, analyses of enzyme levels, ki netic parameters, protein patterns and the morphology of the three strains were carried out. Our results show that these strains of mycelium were affe cted by the substrates used in the media. The aim of the present work was t o optimise the in vitro production of T. borchii mycelium for use in experi ments which require the fungus in precise and reproducible conditions, such as mycorrhizal synthesis or protein and nucleic acid extractions.