dc.contributor.author |
Bhandari, R. |
|
dc.contributor.author |
Sharma, P.K. |
|
dc.date.accessioned |
2015-06-04T03:02:03Z |
|
dc.date.available |
2015-06-04T03:02:03Z |
|
dc.date.issued |
2011 |
|
dc.identifier.citation |
Journal of Applied Phycology. 23(2); 2011; 283-292. |
en_US |
dc.identifier.uri |
http://dx.doi.org/10.1007/s10811-010-9621-8 |
|
dc.identifier.uri |
http://irgu.unigoa.ac.in/drs/handle/unigoa/2531 |
|
dc.description.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 (similar to 80 mu mol 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. |
en_US |
dc.publisher |
Springer Verlag (Germany) |
en_US |
dc.subject |
Botany |
en_US |
dc.title |
Photosynthetic and biochemical characterization of pigments and UV-absorbing compounds in Phormidium tenue due to UV-B radiation |
en_US |
dc.type |
Journal article |
en_US |
dc.identifier.impf |
y |
|