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| Content Provider | Springer Nature Link |
|---|---|
| Author | Bhandari, Rupali R. Sharma, Prabhat Kumar |
| Copyright Year | 2010 |
| Abstract | We report the effect of UV-B radiation (0.8 ± 0.1 mW cm$^{−2}$) and UV-B radiation supplemented with low-intensity PAR (∼80 μmol photons m$^{−2}$ s$^{−1}$) on the photosynthesis, photosynthetic pigments, phosphoglycolipids, oxidative damage, enzymatic antioxidants, and UV-absorbing compounds in Phormidium tenue, a marine cyanobacterium. UV-B radiation resulted in a decline in photosynthesis and photosynthetic pigments leading to lower biomass. P. tenue synthesized UV-absorbing compounds like mycosporine-like amino acids (MAAs) and scytonemin in response to UV-B radiation. Quantity of MAAs and scytonemin was higher when UV-B was supplemented with low-level PAR. UV-B treatment also resulted in quantitative changes in phosphoglycolipids of the membrane. The UV-B treatment resulted in a slight increase in the level of peroxidation of cell membrane and very little increase in the activity of superoxide dismutase (SOD). Results indicate that UV-B affected photosynthesis and that the main protective system was the synthesis of MAAs and scytonemin-like compounds rather than antioxidant enzymes such as SOD. |
| Starting Page | 283 |
| Ending Page | 292 |
| Page Count | 10 |
| File Format | |
| ISSN | 09218971 |
| Journal | Journal of Applied Phycology |
| Volume Number | 23 |
| Issue Number | 2 |
| e-ISSN | 15735176 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2010-11-20 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Chlorophyll fluorescence Cyanobacteria Lipids MDA formation Mycosporine-like amino acids Pigments Phycobilisomes Scytonemin Superoxide dismutase UV-B Plant Physiology Plant Sciences Freshwater & Marine Ecology Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Aquatic Science |
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