An ascomycota coculture in batch bioreactor is better than polycultures for cellulase production
Jazyk angličtina Země Spojené státy americké Médium print-electronic
Typ dokumentu časopisecké články
Grantová podpora
na
Fundación Banco Santander
261027
Consejo Nacional de Ciencia y Tecnología
M13 A02
ECOS NORD ANUIES CONACYT
PubMed
29423709
DOI
10.1007/s12223-018-0588-1
PII: 10.1007/s12223-018-0588-1
Knihovny.cz E-zdroje
- Klíčová slova
- Aspergillus, Endoglucanase, Exoglucanase, Filamentous fungi, Fusarium, Trichoderma, β-Glucosidase,
- MeSH
- Ascomycota enzymologie růst a vývoj izolace a purifikace metabolismus MeSH
- Aspergillus niger enzymologie růst a vývoj izolace a purifikace metabolismus MeSH
- biomasa MeSH
- bioreaktory mikrobiologie MeSH
- celulasy biosyntéza metabolismus MeSH
- celulosa metabolismus MeSH
- fermentace MeSH
- fungální proteiny biosyntéza metabolismus MeSH
- Fusarium enzymologie růst a vývoj izolace a purifikace metabolismus MeSH
- kokultivační techniky * MeSH
- mikrobiální interakce fyziologie MeSH
- průmyslová mikrobiologie metody MeSH
- Trichoderma enzymologie růst a vývoj izolace a purifikace metabolismus MeSH
- xylosidasy biosyntéza metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- celulasy MeSH
- celulosa MeSH
- fungální proteiny MeSH
- xylosidasy MeSH
Efficient hydrolysis of holocellulose depends on a proper balance between cellulase (endoglucanase, exoglucanase, β-glucosidase) and xylanase activities. The present study aimed to induce the production of cellulases and xylanases using liquid cultures (one, two, three, and four fungal strains on the same bioreactor) of wild strains of Trichoderma harzianum, Aspergillus niger, and Fusarium oxysporum. The strains were identified by amplification and analysis of the ITS rDNA region and the obtained sequences were deposited in Genbank. Enzymes (endoglucanase, exoglucansae, β-glucosidase, and xylanase activities) and the profile of extracellular protein isoforms (SDS-PAGE) produced by different fungal combinations (N = 14) were analyzed by Pearson's correlation matrix and principal component analysis (PCA). According to our results, induction of endoglucanase (19.02%) and β-glucosidase (6.35%) were obtained after 4 days when A. niger and F. oxysporum were cocultured. The combination of A. niger-T. harzianum produced higher endoglucanase in a shorter time than monocultures. On the contrary, when more than two strains were cultured in the same reactor, the relationships of competition were established, trending to diminish the amount of enzymes and the extracellular protein isoforms produced. The xylanase production was sensible to stress produced by mixed cultures, decreasing their activity. This is important when the aim is to produce cellulase-free xylanase. In addition, exoglucanase activity did not change in the combinations tested.
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