Response of growth, photosynthetic pigments, laser-induced pigment fluorescence, antioxidant enzymes and lipid peroxidation to ultraviolet-B radiation in two cyanobacteria
| Autor: | J. K. Pandey, Shanthy Sundaram, Ram Gopal, Md. Akhlaqur Rahman |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Cyanobacteria
Antioxidant biology medicine.medical_treatment Synechocystis Plant physiology Plant Science biology.organism_classification Photosynthesis Photochemistry Light-harvesting complex Lipid peroxidation Superoxide dismutase chemistry.chemical_compound chemistry Biochemistry medicine biology.protein bacteria Agronomy and Crop Science |
| Zdroj: | Indian Journal of Plant Physiology. 20:240-248 |
| ISSN: | 0974-0252 0019-5502 |
| Popis: | Cyanobacteria, Anabaena cylindrica and Synechocystis PCC 6803 grown in batch culture were used to assess the effect of UV-B radiation on growth, photosynthetic pigments, photosynthetic excitation energy transfer by laser induced fluorescence, antioxidant activities, lipid peroxidation, proline and protein content. The photosynthetic apparatus, photosynthetic pigments along with excitation energy transfer are the main targets of UV-B radiation. UV-B radiation was found to inhibit the growth, photosynthetic pigments and excitation energy transfer in both cyanobacterial species. The activities of superoxide dismutase, catalase and peroxidase were significantly increased in both Anabaena cylindrica and Synechocystis PCC 6803. Malondialdehyde content was increased more than two folds in both the cyanobacterial species under prolonged incubation with UV light. In Anabaena cylindrica protein content decreased continuously with increasing duration of UV-B radiation. On the other hand in Synechocystis PCC 6803 the protein content increased up to 48 h UV-B treatment and decreased subsequently for 60 and 72 h UV-B exposure. The results indicate that UV-B radiation causes damage in cyanobacteria at several levels. |
| Databáze: | OpenAIRE |
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