Solid-state fermentation (SSF) is a biotechnological process particularly suited to the cultivation of filamentous fungi on plant biomass, including the residual by-products of agriculture and forestry. FMS is of industrial interest for various markets such as food, green chemistry and cosmetics. FMS processes are relatively simple to set up at laboratory scale. However, scaling up presents a number of difficulties, notably linked to the presence of endogenous flora. Our study aimed to analyze the impact of endogenous flora on the colonization of the biomass by the fungal strain. We have chosen the fungus Polyporus brumalis, a high producer of ligno- and cellulolytic enzymes, and miscanthus, a model biomass whose cultivation does not impact the use of land for food agriculture. After 17 days of cultivation at 25°C, we observed that the endogenous flora did not prevent the growth of the fungus. On the other hand, Polyporus brumalis seemed to have an impact on the development of endogenous fungal flora.

Chaima Denhadji*, Isabelle Gimbert, Marie-Noëlle ROSSO ; UMR 1163 INRAE AMU – Fungal Biodiversity and Biotechnology, Faculté des sciences de Luminy – Bât Polytech – 163 avenue de Luminy, 13009 Marseille