0000000001268182
AUTHOR
Carmen Lapadatescu
Influence of cell immobilization on the production of benzaldehyde and benzyl alcohol by the white-rot fungi Bjerkandera adusta, Ischnoderma benzoinum and Dichomitus squalens
International audience; Three white-rot basidiomycetes, Bjerkandera adusta, Ischnoderma benzoinum and Dichomitus squalens, were cultivated on a liquid medium supplemented with l-phenylalanine, a precursor for benzaldehyde (bitter almond aroma) and benzyl alcohol. Remarkable amounts of benzaldehyde (587 mg l−1) were found in cultures of B. adusta. Immobilization of this fungus on polyurethane foam cubes allowed an 8.3-fold increase of the production of benzaldehyde and a 15-fold increase of the productivity as compared with non-immobilized cells. Aryl-alcohol oxidase activity was only detected in B. adusta. This activity was also significantly enhanced in immobilized cells, suggesting that i…
Regulation of the synthesis of aryl metabolites by phospholipid sources in the white-rot fungus Bjerkandera adusta
The white-rot basidiomycete Bjerkandera adusta was cultivated in a liquid medium enriched with l-phenylalanine and various phospholipid sources (lecithin, egg yolk and asolectin). Three aromatic metabolites (benzaldehyde, benzyl alcohol and benzoic acid) were produced under these culture conditions. High concentrations of benzaldehyde (404 mg l–1) were obtained when the cultures were supplemented with 10 g lecithin l–1. Benzyl alcohol production was promoted when the strain was grown with 5 or 10 g lecithin l–1. In the absence of or with a low concentration of lecithin (2.5 g l–1), benzoic acid was the major aryl metabolite synthesized. The results presented here indicate that aryl alcohol …
Bacillus consortium positively impacts arbuscular mycorrhizal fungi community, plant phosphate nutrition and potato yield in Solanum tuberosum cv. Jazzy
Many agricultural soils are naturally poor in plant available phosphorus (P), although total P stocks can exceed plant requirements by more than 100-fold. The reason for such apparent contradiction is that P is complexed under organic and inorganic forms, but only free inorganic orthophosphate (Pi) ions are available to plants and soil organisms. The high immobility of Pi in soil, the low soil solution circulation associated with a rapid root absorption lead to the development of a depletion zone around the roots. As a consequence, P is frequently a limiting factor for plant growth and development.Arbuscular mycorrhizal (AM) fungi are estimated to colonize the vast majority of crop plants a…
Impact de l’inoculation au champ par Rhizophagus irregularis DAOM 197198 (AGTIV ®, Premier Tech, Canada) sur le rendement et la nutrition de 4 variétés de pommes de terre sur 3 parcelles aux propriétés édaphiques différentes
Différents services écosystémiques rendus par les champignons mycorhiziens à arbuscules (CMA) ont été mis en évidence dans des expériences menées sur différentes plantes, que ce soit en conditions contrôlées ou au champ. Les CMAs permettent par exemple, dans des conditions adéquates, d’améliorer la production de biomasse ainsi que le rendement, la qualité et les propriétés organoleptiques de nombreux produits d’intérêt pour l’industrie agro-alimentaire. Cependant, peu d’études se sont intéressées à l’impact de l’inoculation d’un CMA possédant une Autorisation de Mise sur le Marché au champ sur le rendement et la qualité des produits agricoles. Nous avons étudié l’impact de l’inoculation par…