Effect of NaCl salinity on the growth, metabolites, and antioxidant system ofMicrocystis aeruginosa
| Autor: | Qiu-Jin Xu, Ya-Li Zhang, Bei-Dou Xi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Antioxidant
biology medicine.medical_treatment Aquatic Science Malondialdehyde biology.organism_classification Salinity Superoxide dismutase chemistry.chemical_compound chemistry Biochemistry Catalase Chlorophyll biology.protein medicine Osmotic pressure Microcystis aeruginosa Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of Freshwater Ecology. 28:477-487 |
| ISSN: | 2156-6941 0270-5060 |
| DOI: | 10.1080/02705060.2013.782579 |
| Popis: | The physiological and biochemical adaptations of the cyanobacterium Microcystis aeruginosa, grown in a saline environment, were estimated. M11 cultures were exposed to variable salt concentrations (0.5, 1.0, 2.0, and 4.0 g NaCl L−1). The cell density and chlorophyll contents decreased with increasing salinity. The carbohydrate and protein contents were enhanced under lower salinities. The data demonstrated that M. aeruginosa could endure an osmotic potential of 4.0 g NaCl L−1, whereas growth was inhibited under hypersaline conditions above 2.0 g NaCl L−1. The antioxidant activities were evaluated, with salt stress exacerbating membrane lipid peroxidation as indicated by an increasing malondialdehyde (MDA) content. Obvious alterations in the antioxidant enzymes were diverse between the hypo and hypersalinities. Under the hyposaline treatments, high contents of superoxide dismutase (SOD) and catalase (CAT) were detected, whereas hypersaline treatments induced a decrease compared to the control. Accordingly,... |
| Databáze: | OpenAIRE |
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