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UV-B radiation and high light induced oxidative damage in <i>Phormidium corium</i> may cause bleaching to associated coral reefs

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Title UV-B radiation and high light induced oxidative damage in Phormidium corium may cause bleaching to associated coral reefs
 
Creator Bhandari, Rupali R.
Sharma, Prabhat K.
 
Subject antioxidant enzymes
coral bleaching
cyanobacteria
lipid peroxidation
mycosporine like amino acids
reactive oxygen species
UV-B
 
Description 423-428
Effect
of UV-B and photosynthetic active radiation (PAR) flux at 30oC in Phormidium corium (Agardh) Gomont, a cyanobacterium isolated from coral, Porites lutea (Milne-Edwards and Haime)
on the Kavaratti reef of the Lakshawdeep Island, (11o N; 71oE),
India had been examined.   Exposure of P. corium to UV-B and PAR decreased
photosynthetic efficiency and increased oxidative damage measured as Fv/Fm
ratio and lipid peroxidation of cell membrane. Data indicate little activity of
superoxide dismutase (SOD) and ascorbate peroxidase (APX) in response to the
UV-B and PAR treatment. Activity to quench reactive oxygen species (ROS) was
much less in P. corium as compared to
other cyanobacteria and higher plants. Though mycosporine like amino acids
(MAAs) increased significantly as a result of UV-B treatment, PAR caused
decrease in the MAAs content, thus neutralizing the beneficial effect of MAAs. Present study suggest that one of the factors of
bleaching of coral reefs off the Lakshawdeep Island, may be due to oxidative
damage caused to it by production of ROS as P.
corium lacks efficient antioxidant system.
 
Date 2010-11-19T11:29:10Z
2010-11-19T11:29:10Z
2010-09
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/10678
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.39(3) [September 2010]