Journal
MICROBIOLOGICAL RESEARCH
Volume 169, Issue 9-10, Pages 788-793Publisher
ELSEVIER GMBH
DOI: 10.1016/j.micres.2013.12.007
Keywords
Mucoromycotina; Glucose starvation stress; Acetate growth stress; Antioxidant system; Reserve carbohydrates
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Funding
- Spanish Ministry of Education and Science (FPI)
- Direccion General de Investigacion Cientifica y Tecnica (Scientific and Technical Research Council) of the Spanish Ministry of Science and Technology [AGL 2005-01793]
- Junta (Regional Government) of Castile and Leon [LE012A10]
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The objective of this study was to analyze the response of Phycomyces blakesleeanus to glucose starvation and acetate growth stress. At the onset of the exponential growth phase, the fungus shows a high tolerance to both stresses, being higher for the glucose starvation. In both stresses we have found higher activities of catalase and glutathione peroxidase, and a decrease of the pools of D-erythroascorbate (D-erythroascorbate + D-erythroascorbate monoglucoside) and glutathione (GSH + GSSG), while the intracellular GSH/GSSG redox balance becomes more reducing. Gallic acid was not detected under both stresses. Glycogen breakdown and the high levels of trehalose seem to be part of the stress response. Both stress, under the conditions of this study, seem to lead to a qualitatively similar response in P. blakesleeanus, with regard to the behavior of antioxidant system, the content of secondary metabolites and the role of the reserve carbohydrates. (C) 2014 Elsevier GmbH. All rights reserved.
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