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Effect of UV-B Radiation and Desiccation Stress on Photoprotective Compounds Accumulation in Marine Leptolyngbya sp.

Devika, Joshi and Mohandass, C. and Mohan, A. Dhale (2018) Effect of UV-B Radiation and Desiccation Stress on Photoprotective Compounds Accumulation in Marine Leptolyngbya sp. Applied Biochemistry and Biotechnology, 184. pp. 35-47. ISSN 0273-2289

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Abstract

Increased awareness regarding the harmful effects of ultraviolet (UV)-B radiation has led to the search for new sources of natural UV-B protecting compounds. Mycosporinelike amino acids are one of such promising compounds found in several organisms. Cyanobacteria are ideal organisms for isolation of these compounds due to their compatibility and adaptability to thrive under harsh environmental conditions. In the following investigation, we report the production of shinorine in Leptolyngbya sp. isolated from the intertidal region. Based on the spectral characteristics and liquid chromatography-mass spectrometry analysis, the UV-absorbing compound was identified as shinorine. To the best of our knowledge, this is the first report on the occurrence of shinorine in Leptolyngbya sp. We also investigated the effect of artificial UV-B radiation and periodic desiccation on chlorophyll-a, total carotenoids, and mycosporine-like amino acids (MAAs) production. The UV-B radiation had a negative effect on growth and chlorophyll concentration, whereas it showed an inductive effect on the production of total carotenoids and MAAs. Desiccation along with UV-B radiation led to an increase in the concentration of photoprotective compounds. These results indicate that carotenoids and MAAs thus facilitate cyanobacteria to avoid and protect themselves from the deleterious effects of UV-B and desiccation.

Item Type: Article
Uncontrolled Keywords: Cyanobacteria . Desiccation .Mycosporine-like amino acids . Photoprotection .UV radiation
Subjects: 500 Natural Sciences and Mathematics > 07 Life Sciences > 04 Microbiology > 06 Marine Microbiology
600 Technology > 08 Food technology > 06 Preservation and Storage > 07 Radiation
Divisions: Food Microbiology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 18 Jan 2018 06:51
Last Modified: 18 Jan 2018 06:51
URI: http://ir.cftri.com/id/eprint/13306

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