Soybean waste is a good substrate for biomass production, and the expression of amylolytic, xylanolytic and proteolytic enzymes, by selected mushroom fungi. Considerable potential exists for converting soybean wastes into added-value products using systems based on these fungi.
Biomass and hydrolytic and oxidative enzymes production by fungal growth on wheat milling by-products
β Scribed by Quaglia, G. B. ;Di Lena, Gabriella
- Book ID
- 102217171
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 364 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0027-769X
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β¦ Synopsis
Wheat bran and shorts, by-products of the milling process, were submitted to bioconversion by the white-rot Basidiomycete Lentinus edodes. The extracellular polyphenol oxidase, endo-cellulase and phytase productions by the mycelium growing in a solid-state condition on the two substrates were studied. The best results in terms of polyphenol oxidase and endo-cellulase activity yields were obtained in shorts cultures, while no relevant difference was noticed between the two substrates for phytase production. The in uitro dry matter enzyme digestibility (IVDMED) and total nitrogen gain of the substrates during biotransformation were also evaluated. Besides an increment in total nitrogen, the IVDMED of both substrates appeared to be reduced by the biotreatment.
Zusammenfassung
Biomassegewinnung und Produktion von hydrolytischen und oxidierenden Enzymen durch Schimmelpilzkultur in Nebenprodukten der Vermahlung von Weizen Weizenkleie und Kleiemehl, Nebenprodukte der Weizenvermahlung werden einer Biokonversion mit dem ,,white-rot" Basidiomyces Lentinus edodes unterzogen. Dabei wird die extracellulare Polyphenoloxidase-, Endozellulase-und Phytaseproduktion des Myzeliums untersucht, die emers auf den beiden Festsubstanzen angezogen werden. Die hochsten Ausbeuten an Polyphenoloxidase-und Endozellulaseaktivitiit werden im Kleienmehl nachgewiesen, wahrend die Phytasebildung keine erheblichen Unterschiede bei den angewendeten Nahrboden aufweist. Die in uitro-Verdaulichkeit der Trockenmasse und die Zunahme an Gesamtstickstoff wahrend der Biotransformation werden ausgewertet. Neben einem Gewinn an Gesamtstickstoff ergibt sich eine Verringerung der Verdaulichkeit der Trockenmasse in beiden Nahrboden.
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