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Abstract Detail


Stress Tolerance

el baroty, gamal [1], abdelbaky, hanaa [2].

Enhancement of antioxidant production in Spirulina plantensis under oxidative stress.

The present study examines the possibility of increasing the levels of some bioactive compounds in Spirulina plantensis cultivated in media containing various hydrogen peroxide concentrations (2, 4, 6 and 8 mM) as a model for environmental stress. Spirulina plantensis showed significant linear increase in antioxidant enzymes,ie., catalsae (CAT), peroxidase (PX), ascorbate peroxidase (APX) and superoxide dismutase (SOD), with increasing H2O2 levels. A pronounced decrease of an oxidative lesions indexes (thiobarbituric acid reactive substances (TBARs) and alkyl radical-PER signal). HPLC profile of carotenoids and tocopherols of treated algae reaveled that algae responded to change in H2O2 exposure by modifying their cellular contents and compositions. Significant positive correlation was observed between increase in H2O2 in media and increasing the amounts of astaxanthine, lutein and α-tocopherol. Also, hydrophilic antioxidant (glutathione and ascorbic acid content) was increased with increasing H2O2 concentration. These data reaveled that Spirulina plantensis might exhibit different strategies against H2O2 exposure which is dose dependent and strongly correlate with the activity of antioxidant enzymes and antioxidant compounds. Therefore, make Spirulina plantensis good candidates for successful cultivation in artificial open ponds under different environmental conditions as high value health foods, functional foods and as source of wide spectrum of nutrients.


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1 - Ciro univ., biochem, 89 elmalek fassel st elharm Egypt, 89 elmalek fassel st elharm Egypt, giza, 12026, Egypt
2 - cairo univ., plant biochem., 89 elmalek fassel st elharm Egypt, 8989 elmalek fassel st elharm Egypt, giza, 12026, Egypt

Keywords:
none specified

Presentation Type: Oral Paper:Papers for Topics
Session: CP47
Location: Williford C/Hilton
Date: Wednesday, July 11th, 2007
Time: 10:15 AM
Number: CP47005
Abstract ID:20


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