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trachydiscus guangdongensis sp nov a new member of eustigmatophyceae stramenopiles isolated from china morphology phylogeny fatty acid profile pigment and cell wall composition

descriptionPublicationkeyboard_double_arrow_right Article 07 Mar 2019Publisher:Springer Science and Business Media LLCJournal:Hydrobiologia, volume 835, pages 37-47 (issn: 0018-8158, eissn: 1573-5117,

Authors: Baoyan Gao; Luodong Huang; Feifei Wang; Chengwu Zhang;

doi: 10.1007/s10750-019-3925-8

trachydiscus guangdongensis sp nov a new member of eustigmatophyceae stramenopiles isolated from china morphology phylogeny fatty acid profile pigment and cell wall composition

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Abstract

The microalgal strain, JNU5, was isolated downriver from the Hengshishui River of the Guangdong Province, China. The morphology of JNU5 revealed that it was a spherical, unicellular organism with a smooth cell wall. The cell contained a large vacuole and prominent, reddish globule. The pigment composition revealed that chlorophyll a was the only chlorophyll, and violaxanthin was the predominant carotenoid along with vaucheriaxanthin-ester and β-carotene. The fatty acid profile of JNU5 mainly consisted of myristic acid, palmic acid, linoleic acid, and eicosapentaenoic acid (EPA). Moreover, the EPA content consisted of up to 40% of total fatty acids. Phylogeny was determined using the 18S rDNA sequences suggested that JNU5 was a member of Eustigmatophyceae, belonging to Clade IIa and was close to Trachydiscus minutus. T. minutus and JNU5 were easily distinguished by cell shape and size. This indicates that JNU5 is a new species, and thus, we have named it, Trachydiscus guangdongensis sp. nov.. Meanwhile, the cell wall composition of JNU5 was analyzed and was found to be mainly composed of galactose (66%) with some glucose and mannose present. The water-soluble polysaccharide (WSP) of the cell wall was primarily composed of galactose, which accounted for 90% of total sugar.

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University of Jinan
China (People's Republic of)

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Red-shifted light-harvesting system of freshwater eukaryotic alga Trachydiscus minutus (Eustigmatophyta, Stramenopila)
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Stanovení optimálních podmínek pro růst buněk a akumulaci zásobních lipidů řasy Trachydiscus minutus
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Effect of nitrogen and phosphorus starvation on the polyunsaturated triacylglycerol composition, including positional isomer distribution, in the alga Trachydiscus minutus
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Trachydiscus minutus, a new biotechnological source of eicosapentaenoic acid
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RESPONSE OF TRACHYDISCUS MINUTUS (XANTHOPHYCEAE) TO TEMPERATURE AND LIGHT¹
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Fields of Science

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basic medicine

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trachydiscus guangdongensis sp nov a new member of eustigmatophyceae stramenopiles isolated from china morphology phylogeny fatty acid profile pigment and cell wall composition

trachydiscus guangdongensis sp nov a new member of eustigmatophyceae stramenopiles isolated from china morphology phylogeny fatty acid profile pigment and cell wall composition

6 Research products, page 1 of 1

Způsob kultivace kmenů mikrořas

Red-shifted light-harvesting system of freshwater eukaryotic alga Trachydiscus minutus (Eustigmatophyta, Stramenopila)

Stanovení optimálních podmínek pro růst buněk a akumulaci zásobních lipidů řasy Trachydiscus minutus

Effect of nitrogen and phosphorus starvation on the polyunsaturated triacylglycerol composition, including positional isomer distribution, in the alga Trachydiscus minutus

Trachydiscus minutus, a new biotechnological source of eicosapentaenoic acid

RESPONSE OF TRACHYDISCUS MINUTUS (XANTHOPHYCEAE) TO TEMPERATURE AND LIGHT1

RESPONSE OF TRACHYDISCUS MINUTUS (XANTHOPHYCEAE) TO TEMPERATURE AND LIGHT¹