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Effect of different stresses on trehalose levels in Rhizopus oryzae
Author(s) -
Uyar Ebru Ozer,
Hamamci Haluk,
Türkel Sezai
Publication year - 2010
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.200900339
Subject(s) - trehalose , rhizopus oryzae , osmotic shock , chemistry , rhizopus , food science , stress (linguistics) , biochemistry , fermentation , linguistics , philosophy , gene
Rhizopus oryzae accumulates and degrades trehalose in response to environmental stress conditions such as heat, osmotic stress, nitrogen starvation and pH. When heat stress was applied to R. oryzae , the trehalose content of the cells was increased from 0.9 to 4.8 mg/g dw and when the stress was relieved it decreased back to 1.1 mg/g dw. Under osmotic stress and nitrogen starvation, trehalose content was increased by 3.5 and 3 fold, respectively. The decrease in external pH increased trehalose level up to 2.6 mg/g dw from 1.1 mg/g dw. Increased trehalose level decreased back to normal after pH stress was relieved. These results indicate that trehalose accumulates and acts as a stress protectant in R. oryzae . (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)