Torres A. auteur aut IRD Li S.M. auteur aut IRD Roussos Sevastianos auteur aut IRD Vert M. auteur aut IRD text journalArticle eng text/pdf reformatted digital access The ability of some microorganisms to use lactic acid stereocopolymers and copolymers with glycolic acid as sole carbon and energy sources was studied under controlled or natural conditions. First, 14 filamentous fungal strains were tested in liquid cultures, adopting total lactic acid consumption, nitrogen source exhaustion, and maximal biomass production as selection criteria. Two strains of Fusarium moniliforme and one strain of Penicillium roqueforti were able to totally assimilate DL-lactic acid, partially soluble racemic oligomers (Mw = 1,000) and the nitrogen source. Only one strain of F. moniliforme was able to grow on a poly(lactic acid) - glycolic acid copolymer (Mw = 150,000) after 2 months of incubation at 28°C on synthetic agar medium. Mycelium development was examined by scanning electron microscopy. F. moniliforme filaments were observed to grow not only at the copolymer surface but also through the bulk of the copolymer. In a second approach, plates made of a racemic poly(lactic acid) were buried in the soil before being incubated in petri dishes containing mineral agar medium under controlled conditions. Five strains of different filamentous fungi were isolated, and their ability to assimilate racemic poly(lactic acid) oligomers was tested in liquid cultures. (Résumé d'auteur) specialized FERMENTATION BIODEGRADATION ETUDE EXPERIMENTALE MILIEU DE CULTURE CHAMPIGNON ETUDE COMPARATIVE MICROSCOPIE ELECTRONIQUE A BALAYAGE POLYMERE ACIDE LACTIQUE 084FERMEN 62 7 2393-2397 1996 0099-2240 https://www.documentation.ird.fr/hor/fdi:010006522 0099-2240 [F B010006522] https://www.documentation.ird.fr/hor/fdi:010006522 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_45-46/010006522.pdf IRD - Base Horizon / Pleins textes 1996-08-20 2006-05-27 fdi:010006522 fre