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Individual and combined effects of physicochemical parameters on ellagitannin acyl hydrolase and ellagic acid production from ellagitannin by Aspergillus oryzae

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Abstract

The individual and interactive effects of physicochemical parameters on ellagitannin acyl hydrolase activity and ellagic acid production by Aspergillus oryzae using ellagitannins from acorn fringe of oak as substrate were studied. Ellagitannins concentration, incubation time were identified as important physicochemical parameters influencing the enzyme synthesis and the production accumulation, and the substrate concentration with initial pH was determined to has an interactive effect on the enzyme synthesis, while ellagitannins concentration and initial pH with incubation time were found to have interactions on the production accumulation. Furthermore, the parameters were optimized by quadratic programming. Under optimum condition, the fermentation run lasted 84 h with 4 g L−1 ellagitannins concentration, yielding 17.7% ellagic acid. However, the maximum enzyme activity was obtained in 96 h with 5 g L−1 substrate concentration. The research demonstrated a possible way to develop an efficient approach for recovery of higher added-value product (ellagic acid) from forestry byproduct (acorn fringe of oak).

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Acknowledgments

Financial support of this research was from the National Key Technologies R&D Program of China with grant no. 2001BA804A21. Sincere thanks are to Dr Jinshui Yang at China Agricultural University for providing the microbial culture and technical assistance in the experimental studies.

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Authors and Affiliations

  1. Department of Environmental Engineering, Peking University, Beijing, 100871, China

    Z. S. Li

  2. Institute for Nanobiomedical Technology and Membrane Biology, State Key Lab of Biotherapy of Human Diseases, Cancer Center, West China Hospital, West China Medical School, Sichuan University, Keyuan 4 Road No.1, Gaopeng Avenue, Chengdu, Gaoxin District, 610041, China

    W. Huang, G. H. Gong & H. Li

  3. Mathematical College, Sichuan University, 24, South Section 1, Yihuan Road, Chengdu, 610064, China

    H. Niu

  4. Key Laboratory of Transplant Engineering and Immunology Ministry of Health, West China Hospital, West China Medical School, Sichuan University, Keyuan 4th Road 1, Gaopeng Avenue, Chengdu, Gaoxin District, 610041, China

    Y. R. Lu

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  1. W. Huang
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  2. H. Niu
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  3. G. H. Gong
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  4. Y. R. Lu
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  5. Z. S. Li
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  6. H. Li
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Correspondence to Z. S. Li.

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Huang, W., Niu, H., Gong, G. et al. Individual and combined effects of physicochemical parameters on ellagitannin acyl hydrolase and ellagic acid production from ellagitannin by Aspergillus oryzae . Bioprocess Biosyst Eng 30, 281–288 (2007). https://doi.org/10.1007/s00449-007-0125-0

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  • DOI: https://doi.org/10.1007/s00449-007-0125-0

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