Compétitions entre symbiotes sur jeunes noisetiers truffiers

Abstract

One-year-old hazel seedlings, infected with Tuber melanosporum, were transfered from a nursery substrate to pots filled with disinfected truffle-orchard soil in order to observe the development of T. melanosporum and other symbionts. The overall infection and the colonization by each type of symbionts were related to the development of the roots. Hazel seedlings with very extensive root systems were more affected by competitive symbionts than less developed plants. Colonization by some symbionts induced the exclusion of T. melanosporum. © Société botanique de France 1994.