Document Detail


Morphogenetic behavior of tropical marine yeast Yarrowia lipolytica in response to hydrophobic substrates.
MedLine Citation:
PMID:  18852507     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The morphogenetic behavior of a tropical marine Yarrowia lipolytica strain on hydrophobic substrates was studied. Media containing coconut oil or palm kernel oil (rich in lauric and myristic acids) prepared in distilled water or seawater at a neutral pH supported 95% of the cells to undergo a transition from the yeast form to the mycelium form. With potassium laurate, 51% of the cells were in the mycelium form, whereas with myristate, 32% were in the mycelium form. However, combinations of these two fatty acids in proportions that are present in coconut oil or palm kernel oil enhanced the mycelium formation to 65%. The culture also produced extracellular lipases during the morphogenetic change. The yeast cells were found to attach to the large droplets of the hydrophobic substrates during the transition, while the mycelia were associated with the aqueous phase. The alkane-grown yeast partitioned more efficiently in the hydrophobic phases when compared with the coconut oil-grown mycelia. A fatty acid analysis of the mycelial form revealed the presence of lauric acid in addition to the long-chain saturated and unsaturated fatty acids observed in the yeast form. The mycelia underwent a rapid transition to the yeast form with n-dodecane, a medium-chain aliphatic hydrocarbon. Thus, the fungus displayed a differential behavior towards the two types of saturated hydrophobic substrates.
Authors:
Smita S Zinjarde; Bhagyashree V Kale; Paresh V Vishwasrao; Ameeta R Kumar
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of microbiology and biotechnology     Volume:  18     ISSN:  1017-7825     ISO Abbreviation:  J. Microbiol. Biotechnol.     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-10-14     Completed Date:  2009-02-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9431852     Medline TA:  J Microbiol Biotechnol     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  1522-8     Citation Subset:  IM    
Affiliation:
Institute of Bioinformatics and Biotechnology, University of Pune, Pune 411007, India. smita@unipune.ernet.in
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MeSH Terms
Descriptor/Qualifier:
Alkanes / pharmacology*
Culture Media
Hydrophobicity
Lauric Acids / pharmacology
Lipase / metabolism
Mycelium / cytology*,  drug effects,  growth & development
Myristic Acid / pharmacology
Plant Oils / pharmacology*
Salinity
Yarrowia / cytology*,  drug effects*,  enzymology,  growth & development
Chemical
Reg. No./Substance:
0/Alkanes; 0/Culture Media; 0/Lauric Acids; 0/Plant Oils; 143-07-7/lauric acid; 544-63-8/Myristic Acid; EC 3.1.1.3/Lipase

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