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Endophytic Fungal Strains of Soybean for Lipid Production

机译：大豆内生真菌菌株的脂质生产

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摘要

Lipids created via microbial biosynthesis are a potential raw material to replace plant-based oil for biodiesel production. Oleaginous microbial species currently available are capable of accumulating high amount of lipids in their cell biomass, but rarely can directly utilize lignocellulosic biomass as substrates. Thus this research focused on the screening and selection of new fungal strains that generate both lipids and hydrolytic enzymes. To search for oleaginous fungal strains in the soybean plant, endophytic fungi and fungi close to the plant roots were studied as a microbial source. Among 33 endophytic fungal isolates screened from the soybean plant, 13 have high lipid content (>20 % dry biomass weight); among 38 fungal isolates screened from the soil surrounding the soybean roots, 14 have high lipid content. Also, five fungal isolates with both high lipid content and promising biomass production were selected for further studies on their cell growth, oil accumulation, lipid content and profile, utilization of various carbon sources, and cellulase production. The results indicate that most strains could utilize different types of carbon sources and some strains accumulated >40 % of the lipids based on the dry cell biomass weight. Among these promising strains, some Fusarium strains specifically showed considerable production of cellulase, which offers great potential for biodiesel production by directly utilizing inexpensive lignocellulosic material as feedstock.
机译：通过微生物生物合成产生的脂质是一种潜在的原料，可以代替植物油生产生物柴油。当前可获得的含油微生物物种能够在其细胞生物质中积累大量脂质，但很少能直接利用木质纤维素生物质作为底物。因此，本研究集中于筛选和选择同时产生脂质和水解酶的新真菌菌株。为了在大豆植物中寻找油性真菌菌株，研究了内生真菌和植物根附近的真菌作为微生物来源。从大豆植物中筛选出的33种内生真菌分离株中，有13种具有较高的脂质含量（> 20％的干生物质干重）;从大豆根部周围土壤筛选出的38种真菌分离物中，有14种具有较高的脂质含量。此外，选择了五个具有高脂质含量和有前途的生物质生产能力的真菌分离株，以进一步研究它们的细胞生长，油脂积累，脂质含量和特性，各种碳源的利用以及纤维素酶的生产。结果表明，大多数菌株可以利用不同类型的碳源，并且根据干细胞生物量的重量，一些菌株积累了超过40％的脂质。在这些有前景的菌株中，某些镰刀菌菌株特别显示出纤维素酶的大量生产，这通过直接利用廉价的木质纤维素材料作为原料为生物柴油生产提供了巨大的潜力。

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  • 来源
    《Bioenergy research》 |2014年第1期|353-361|共9页
  • 作者

    Yan Yang; Mi Yan; Bo Hu;

  • 作者单位

    1.Department of Bioproducts and Biosystems Engineering University of Minnesota 1390 Eckles Avenue Saint Paul MN 55108-6005 USA;

    1.Department of Bioproducts and Biosystems Engineering University of Minnesota 1390 Eckles Avenue Saint Paul MN 55108-6005 USA;

    1.Department of Bioproducts and Biosystems Engineering University of Minnesota 1390 Eckles Avenue Saint Paul MN 55108-6005 USA;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Oleaginous fungus Lignocellulosic utilization Cellulase Biodiesel production;

    机译：油脂性真菌木质纤维素利用纤维素酶生物柴油的生产;

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