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Characterisation and bioprospecting of cold adapted yeast from water samples of Kongsfjord, Norwegian Arctic

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Title Characterisation and bioprospecting of cold adapted yeast from water samples of Kongsfjord, Norwegian Arctic
 
Creator Hatha, A A Mohamed
Rahiman, Mujeeb K M
Krishnan, K P
Saramma, A V
Saritha, G
Deepu, Lal
 
Subject Kongsfjord
Arctic
Marine yeast
Hydrolytic enzymes
 
Description 458-465
A total of 34 yeast isolates were
characterized from 4 water samples collected from Kongsfjord at Ny Alesund
region (79° N, 12° E) of Norwegian Arctic
during the Indian Arctic Summer Expedition of 2009. They were studied for the
effect of temperature and salt concentration on growth as well as for their
ability to produce various hydrolytic enzymes at two different temperatures. Result showed that 5 out of 8 genera were common
to all the stations. Cryptococcus was
the predominant genera (>30%) followed by Trichosporon and Rhodotorula.
Eighty two percentages of the yeast isolates were oxidative in nature and
except Filobasidium, all the isolates
used nitrate as a nitrogen source for growth. Yeast isolates from all the
stations showed growth at 4°C
and 20°C. These temperatures were chosen as most of the bacterial and yeast
isolates showed psychrotrophic than true psychrophilic nature. Ninety four
percentage of the yeast isolates showed growth at 2.0 M concentration of NaCl.
While all the isolates were capable of producing gelatinase and lipase at 20oC,
gelatinolytic (88%) and lipolytic activity (97%) were marginally less at 4oC.
None of the isolates produced amylase enzyme when incubated at 4°C and 20°C. The present study
highlights the wide tolerance of the psychrotrophic yeast isolates to
temperature and salinity as well as their potential in biotechnology.
 
Date 2013-09-02T12:17:31Z
2013-09-02T12:17:31Z
2013-08
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/20905
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.42(4) [August 2013]