Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it>
<p>Abstract</p> <p>Background</p> <p>Biochemical conversion of lignocellulose hydrolysates remains challenging, largely because most microbial processes have markedly reduced efficiency in the presence of both hexoses and pentoses. Thus, identification of microorganisms...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2011-08-01
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| Series: | Biotechnology for Biofuels |
| Online Access: | http://www.biotechnologyforbiofuels.com/content/4/1/25 |
| _version_ | 1811256449136852992 |
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| author | Jin Guojie Wang Qian Wu Siguo Hu Cuimin Shen Hongwei Zhao Zongbao K |
| author_facet | Jin Guojie Wang Qian Wu Siguo Hu Cuimin Shen Hongwei Zhao Zongbao K |
| author_sort | Jin Guojie |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Biochemical conversion of lignocellulose hydrolysates remains challenging, largely because most microbial processes have markedly reduced efficiency in the presence of both hexoses and pentoses. Thus, identification of microorganisms capable of efficient and simultaneous utilization of both glucose and xylose is pivotal to improving this process.</p> <p>Results</p> <p>In this study, we found that the oleaginous yeast strain <it>Trichosporon cutaneum </it>AS 2.571 assimilated glucose and xylose simultaneously, and accumulated intracellular lipid up to 59 wt% with a lipid coefficient up to 0.17 g/g sugar, upon cultivation on a 2:1 glucose/xylose mixture in a 3-liter stirred-tank bioreactor. In addition, no classic pattern of diauxic growth behavior was seen; the microbial cell mass increased during the whole culture process without any lag periods. In shake-flask cultures with different initial glucose:xylose ratios, glucose and xylose were consumed simultaneously at rates roughly proportional to their individual concentrations in the medium, leading to complete utilization of both sugars at the same time. Simultaneous utilization of glucose and xylose was also seen during fermentation of corn-stover hydrolysate with a lipid content and coefficient of 39.2% and 0.15 g/g sugar, respectively. The lipid produced had a fatty-acid compositional profile similar to those of conventional vegetable oil, indicating that it could have potential as a raw material for biodiesel production.</p> <p>Conclusion</p> <p>Efficient lipid production with simultaneous consumption of glucose and xylose was achieved in this study. This process provides an exciting opportunity to transform lignocellulosic materials into biofuel molecules, and should also encourage further study to elucidate this unique sugar-assimilation mechanism.</p> |
| first_indexed | 2024-04-12T17:40:14Z |
| format | Article |
| id | doaj.art-36da638b29854663a6a0b1ce4bb484a9 |
| institution | Directory Open Access Journal |
| issn | 1754-6834 |
| language | English |
| last_indexed | 2024-04-12T17:40:14Z |
| publishDate | 2011-08-01 |
| publisher | BMC |
| record_format | Article |
| series | Biotechnology for Biofuels |
| spelling | doaj.art-36da638b29854663a6a0b1ce4bb484a92022-12-22T03:22:49ZengBMCBiotechnology for Biofuels1754-68342011-08-01412510.1186/1754-6834-4-25Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it>Jin GuojieWang QianWu SiguoHu CuiminShen HongweiZhao Zongbao K<p>Abstract</p> <p>Background</p> <p>Biochemical conversion of lignocellulose hydrolysates remains challenging, largely because most microbial processes have markedly reduced efficiency in the presence of both hexoses and pentoses. Thus, identification of microorganisms capable of efficient and simultaneous utilization of both glucose and xylose is pivotal to improving this process.</p> <p>Results</p> <p>In this study, we found that the oleaginous yeast strain <it>Trichosporon cutaneum </it>AS 2.571 assimilated glucose and xylose simultaneously, and accumulated intracellular lipid up to 59 wt% with a lipid coefficient up to 0.17 g/g sugar, upon cultivation on a 2:1 glucose/xylose mixture in a 3-liter stirred-tank bioreactor. In addition, no classic pattern of diauxic growth behavior was seen; the microbial cell mass increased during the whole culture process without any lag periods. In shake-flask cultures with different initial glucose:xylose ratios, glucose and xylose were consumed simultaneously at rates roughly proportional to their individual concentrations in the medium, leading to complete utilization of both sugars at the same time. Simultaneous utilization of glucose and xylose was also seen during fermentation of corn-stover hydrolysate with a lipid content and coefficient of 39.2% and 0.15 g/g sugar, respectively. The lipid produced had a fatty-acid compositional profile similar to those of conventional vegetable oil, indicating that it could have potential as a raw material for biodiesel production.</p> <p>Conclusion</p> <p>Efficient lipid production with simultaneous consumption of glucose and xylose was achieved in this study. This process provides an exciting opportunity to transform lignocellulosic materials into biofuel molecules, and should also encourage further study to elucidate this unique sugar-assimilation mechanism.</p>http://www.biotechnologyforbiofuels.com/content/4/1/25 |
| spellingShingle | Jin Guojie Wang Qian Wu Siguo Hu Cuimin Shen Hongwei Zhao Zongbao K Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it> Biotechnology for Biofuels |
| title | Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it> |
| title_full | Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it> |
| title_fullStr | Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it> |
| title_full_unstemmed | Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it> |
| title_short | Simultaneous utilization of glucose and xylose for lipid production by <it>Trichosporon cutaneum</it> |
| title_sort | simultaneous utilization of glucose and xylose for lipid production by it trichosporon cutaneum it |
| url | http://www.biotechnologyforbiofuels.com/content/4/1/25 |
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