The investigation of media components for optimal metabolite production of Aspergillus terreus ATCC 20542.

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ID: 3806
2019
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Abstract
This study aimed to assess the effect of nitrogen, salt and pre-culture conditions on the production of lovastatin in A. terreus ATCC 20542.Different combinations of nitrogen sources, salts and pre-culture combinations were applied in the fermentation media and lovastatin yield was analysed chromatographically.The exclusion of MnSO ·5HO, CuSO·5HO and FeCl·6HO were shown to significantly improve lovastatin production (282%), while KHPO, MgSO·7HO, and NaCl and ZnSO·7HO were indispensable for good lovastatin production. Simple nitrogen source (ammonia) was unfavourable for morphology, growth and lovastatin production. In contrast, yeast extract (complex nitrogen source) produced the highest lovastatin yield (25.52 mg/L), while powdered soybean favoured the production of co-metabolites ((+)-geodin and sulochrin). Intermediate lactose: yeast extract (5:4) ratio produced the optimal lovastatin yield (12.33 mg/L) during pre-culture, while high (5:2) or low (5:6) lactose to yeast extract ratio produced significantly lower lovastatin yield (7.98 mg/L and 9.12 mg/L, respectively). High spore concentration, up to 10 spores/L was shown to be beneficial for lovastatin, but not for co-metabolite production, while higher spore age was shown to be beneficial for all of its metabolites.The findings from these investigations could be used for future cultivation of A. terreus in the production of desired metabolites.
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Authors Rahim, Muhamad Hafiz Abd;Lim, Elicia Jitming;Hasan, Hanan;Abbas, Ali;
Journal Journal of microbiological methods
Year 2019
DOI
S0167-7012(19)30510-X
URL
Keywords Keywords not found

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