Differential physiological and biochemical responses of two cyanobacteria Nostoc muscorum and Phormidium foveolarum against oxyfluorfen and UV-B radiation
| Autor: | Sheeba, Vijay Pratap Singh, Prabhat Kumar Srivastava, Sheo Mohan Prasad |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Cyanobacteria
Proline Ultraviolet Rays Health Toxicology and Mutagenesis Acid Phosphatase Ascorbic Acid Biology Nitrate reductase medicine.disease_cause Photosynthesis Nitrate Reductase Antioxidants Botany Halogenated Diphenyl Ethers medicine Nostoc muscorum Biomass Phormidium foveolarum Public Health Environmental and Occupational Health General Medicine Alkaline Phosphatase biology.organism_classification Pollution Oxidative Stress Biochemistry Alkaline phosphatase Oxidative stress |
| Zdroj: | Ecotoxicology and Environmental Safety. 74:1981-1993 |
| ISSN: | 0147-6513 |
| DOI: | 10.1016/j.ecoenv.2011.07.006 |
| Popis: | In the present study, degree of tolerance and tolerance strategies of two paddy field cyanobacteria viz. Nostoc muscorum and Phormidium foveolarum against oxyfluorfen (10 and 20 μg ml(-1)) and UV-B (7.2 kJ m(-2)d(-1)) stress were investigated. Oxyfluorfen and UV-B decreased growth, photosynthesis, nutrient uptake, nitrate reductase, acid and alkaline phosphatase activities, which accompanied with the increase in the level of oxidative stress. However, growth was more affected in N. muscorum than P. foveolarum. Antioxidants exhibited differential responses against oxyfluorfen and UV-B stress. Ascorbate and proline levels were higher in P. foveolarum. A protein of 66 kDa was expressed in N. muscorum, however, it was absent in P. foveolarum than those of N. muscorum. Besides this, a protein of 29 kDa appeared in P. foveolarum under all the treatments, but it was present only in control cells of N. muscorum cells. Overall results indicated resistant nature of P. foveolarum against oxyfluorfen and UV-B stress in comparison to N. muscorum. |
| Databáze: | OpenAIRE |
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