Influence of rice straw-derived dissolved organic matter on lactic acid fermentation by Rhizopus oryzae
| Autor: | Tian-Ao Zhang, Yiyun Xue, Yiu Fai Tsang, Hongsheng Zhang, Jiajun Hu, Xingxuan Chen, Yuhao Li, Min-Tian Gao, Xiahui Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
animal structures Rhizopus oryzae Bioengineering 010501 environmental sciences Polysaccharide 01 natural sciences Applied Microbiology and Biotechnology Hydrolysate chemistry.chemical_compound Rhizopus Polysaccharides 010608 biotechnology Food science Biomass Lactic Acid Organic Chemicals 0105 earth and related environmental sciences chemistry.chemical_classification biology Plant Extracts food and beverages Polyphenols Oryza biology.organism_classification Lactic acid Glucose chemistry Solubility Polyphenol Fermentation Lactic acid fermentation Biotechnology |
| Zdroj: | Journal of bioscience and bioengineering. 125(6) |
| ISSN: | 1347-4421 |
| Popis: | Rice straw can be used as carbon sources for lactic acid fermentation. However, only a small amount of lactic acid is produced even though Rhizopus oryzae can consume glucose in rice straw-derived hydrolysates. This study correlated the inhibitory effect of rice straw with rice straw-derived dissolved organic matter (DOM). Lactic acid fermentations with and without DOM were conducted to investigate the effect of DOM on lactic acid fermentation by R. oryzae. Fermentation using control medium with DOM showed a similar trend to fermentation with rice straw-derived hydrolysates, showing that DOM contained the major inhibitor of rice straw. DOM assay indicated that it mainly consisted of polyphenols and polysaccharides. The addition of polyphenols and polysaccharides derived from rice straw confirmed that lactic acid fermentation was promoted by polysaccharides and significantly inhibited by polyphenols. The removal of polyphenols also improved lactic acid production. However, the loss of polysaccharides during the removal of polyphenols resulted in low glucose consumption. This study is the first to investigate the effects of rice straw-derived DOM on lactic acid fermentation by R. oryzae. The results may provide a theoretical basis for identifying inhibitors and promoters associated with lactic acid fermentation and for establishing suitable pretreatment methods. |
| Databáze: | OpenAIRE |
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