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Diversity of marine yeasts with high protein content and evaluation of their nutritive compositions

Published online by Cambridge University Press:  08 July 2008

Zhenming Chi ,
Kuiran Yan ,
Lingmei Gao ,
Jing Li ,
Xianghong Wang  and
Lin Wang
Zhenming Chi*
Affiliation:
Unesco Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No.5, Qingdao, China
Kuiran Yan
Affiliation:
Unesco Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No.5, Qingdao, China
Lingmei Gao
Affiliation:
Unesco Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No.5, Qingdao, China
Jing Li
Affiliation:
Unesco Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No.5, Qingdao, China
Xianghong Wang
Affiliation:
Unesco Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No.5, Qingdao, China
Lin Wang
Affiliation:
Unesco Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No.5, Qingdao, China
*
Correspondence should be addressed to: Zhenming Chi, Unesco Chinese Center of Marine Biotechnology, Ocean University of China, Yushan Road, No.5, Qingdao, China email: [email protected]
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Abstract

A total of 327 yeast strains from seawater, sediments, mud of salterns, guts of the marine fish and marine algae were obtained. After crude protein of the yeasts was estimated by the method of Kjehldahl, we found that eight strains of the marine yeasts grown in the medium with 20 g l−1 glucose contained more than 30.4 g protein per 100 g of cell dry weight. The results of routine identification and molecular methods show that they belong to Metschnikowa reukaui, Cryptococcus aureus, Aureobasidium pullulan, Yarrowia lipolytica and Hanseniaspora uvarum, respectively. With the exception of Aureobasidium pullulans 4#2 with nucleic acid of 7.7% (w/w), all other yeast strains contained less than 5.0% (w/w) of nucleic acid. Analysis of fatty acids shows that all the yeast strains tested had a large amount of C18:0 and C18:1 fatty acids while analysis of amino acids indicates that the yeast strains tested had a large amount of essential amino acids, especially lysine and leucine which are very important nutritive components for marine animals.

Keywords

diversitymarine yeastshigh protein contentnutritive composition
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Issue 7 , November 2008 , pp. 1347 - 1352
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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