Biodiversity of the oleaginous microorganisms in Tibetan Plateau

Li, Shi Lin; Lin, Qiang; Li, Xin Ran; 徐, 会連; Yang, Yun Xi; Qiao, Dai Rong; Cao, Yi

doi:10.1590/s1517-83822012000200026

Cited by 28 publications

(13 citation statements)

References 17 publications

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“…Moreover, two of the psycrotrophic isolates from Antarctica resulted oleaginous. This finding was not surprising since the presence of oleaginous yeasts and molds in extreme cold environments like the Tibetian plateau has already been reported [20]. Although many of the isolates were characterized as oleaginous, only four isolates were able to accumulate a significantly higher amount of intracellular lipids, with levels exceeding the 40% of cell dry weight.…”

Section: Discussionsupporting

confidence: 59%

Oleaginous Yeasts form Uruguay and Antarctica as Renewable Raw Material for Biodiesel Production

Pereyra¹

2014

AJBIO

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Abstract:In the present study a screening of oleaginous yeasts from different habitats nearby Montevideo, Uruguay, was carried out. Four yeast strains previously isolated from soil from Fildes Peninsula, in the Antarctic region, were also included in the study. More than 75% of the obtained isolates were characterized as oleaginous though only four of them (two from Antarctica and two from Uruguay) were able to accumulate lipids to levels exceeding the 40% of cell dry weight. One of the selected strains was identified as Rhodotorula graminis, which has been already recognized as an oleaginous species. However, the other three isolates belong to species, which have not been reported as oleaginous before. This work constitutes the first report of Cryptococcus phenolicus, Cystofilobasidium infirmominiatum and Leucosporidium scottii as oleaginous species. Three of the selected isolates were able to grow with glycerol as carbon source. According to lipid production in presence of glycerol, one isolate was selected for further studies. The ability to grow and accumulate intracellular lipids in presence of crude glycerol was assessed for the selected strain. In such conditions, a maximum concentration of 5.9 g L -1 of lipids with a suitable fatty acid profile according to the requirements established in our country for the raw material used in the production of biodiesel, was obtained.

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Section: Discussionsupporting

confidence: 59%

Oleaginous Yeasts form Uruguay and Antarctica as Renewable Raw Material for Biodiesel Production

Pereyra¹

2014

AJBIO

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“…The genotypic identification using the 18S rRNA gene sequencing confirmed that this isolate is related to F. solani. In a similar study, Li et al (2012) isolated several Fusarium strains from the Tibetan Plateau with lipid contents ranging from 15Á4 to 27Á6%. Also, Chahal et al (1979) reported that a strain of F. oxysporum could accumulate a lipid content of 24Á3%.…”

Section: Discussionmentioning

confidence: 99%

Direct transesterification of fatty acids produced by Fusarium solani for biodiesel production: effect of carbon and nitrogen on lipid accumulation in the fungal biomass

2019

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Aims The present work aims to explore a new oleaginous Fusarium isolate potential to accumulate lipids in its biomass from inexpensive substrates. In addition, impacts of carbon and nitrogen sources and their ratios on lipid production by the interested fungal isolate were also studied. Methods and Results Lipid was assayed by sulfo‐phospho‐vanillin colorimetric method. Among 11 Fusarium isolates obtained on potato dextrose agar from rhizosphereic soils, Fusarium RAS18 was selected as the highest producer that accumulates above 20% lipid. It was identified based on phenotypic characterization and the internal transcribed spacer sequence as Fusarium solani, that was recorded in the GenBank database under the accession number . The optimized lipid yield (34·5%) is obtained using glycerol (35 g l−1) and peptone (1·5 g l−1) as carbon and nitrogen sources respectively. The produced fatty acid methyl esters (biodiesel) is composed of linoleic acid (56·81%), palmitic acid (17·81%), oleic acid (11·81%) and stearic acid (11·12). The unsaturated fatty acids accounted for 69% and this is nearly similar to the plant oils commonly used in biodiesel production. Conclusions These findings suggest the applicability of F. solani RAS18 as a promising strain to accumulate lipids from glycerol as a feedstock for biodiesel production. Significance and Impact of the Study Fusarium solani RAS18 is a new oleaginous fungal isolate that is able to produce lipid (34·5%, g g−1) from glycerol. Glycerol is a cheap substrate and is formed as a byproduct from transesterification process and others industries. Thus, recyclation of glycerol for lipid production by micro‐organisms is an important point of economic view. Direct transesterification of the produced fatty acids indicated its similarity to the plant oil composition used in biodiesel production. So, F. solani RAS18 might be a potential lipid source as a feedstock for biodiesel production.

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“…(1) Selective cultivation of environmental 444 microbes that could continue growing for several generations in carbon-free medium using their own 445 stored lipids as the sole carbon source resulted in the discovery that Cryptococcus adeliensis is oleaginous 446 (Li et al , 2012).…”

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confidence: 99%

Oleaginous yeasts for biodiesel: Current and future trends in biology and production

Sitepu¹,

Garay²,

Sestric³

et al. 2014

Biotechnology Advances

390

217

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Production of biodiesel from edible plant oils is quickly expanding worldwide to fill a need for renewable, environmentally-friendly liquid transportation fuels. Due to concerns over use of edible commodities for fuels, production of biodiesel from non-edible oils including microbial oils is being developed. Microalgae biodiesel is approaching commercial viability, but has some inherent limitations such as requirements for sunlight. While yeast oils have been studied for decades, recent years have seen significant developments including discovery of new oleaginous yeast species and strains, greater understanding of the metabolic pathways that determine oleaginicity, optimization of cultivation processes for conversion of various types of waste plant biomass to oil using oleaginous yeasts, and development of strains with enhanced oil production. This review examines aspects of oleaginous yeasts not covered in depth in other recent reviews. Topics include the history of oleaginous yeast research, especially advances in the early 20th century; the phylogenetic diversity of oleaginous species, beyond the few species commonly studied; and physiological characteristics that should be considered when choosing yeast species and strains to be utilized for conversion of a given type of plant biomass to oleochemicals. Standardized terms are proposed for units that describe yeast cell mass and lipid production.

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Biodiversity of the oleaginous microorganisms in Tibetan Plateau

Cited by 28 publications

References 17 publications

Oleaginous Yeasts form Uruguay and Antarctica as Renewable Raw Material for Biodiesel Production

Oleaginous Yeasts form Uruguay and Antarctica as Renewable Raw Material for Biodiesel Production

Direct transesterification of fatty acids produced by Fusarium solani for biodiesel production: effect of carbon and nitrogen on lipid accumulation in the fungal biomass

Oleaginous yeasts for biodiesel: Current and future trends in biology and production

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