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<p>The purpose of this study was to screen the presence of UV protective compounds (MAAs and Scytonemin) in six species of cyanobacteria (<i>Oscillatoria pseudogeminata</i>, <i>Oscillatoria boryana</i>, <i>Phormidium tenue</i>, <i>Phormidium bohneri</i>, <i>Lyngbya majuscula</i> and <i>Lyngbya martensiana</i>) isolated from Odisha coast, India. The organisms were exposed to UV-B (280–315&#xa0;nm wavelength) light for different time intervals (0–60&#xa0;min) and then maintained in natural culture conditions. The amount of photoprotective compounds (MAAs and scytonemin) in test species was gradually increased in response to increased time duration of UV-B, depicting a peak value at 45&#xa0;min followed by decrease at 60&#xa0;min. Among the species of <i>Lyngbya</i>, <i>L. majuscula</i> was found to have maximum value of phtoprotectants compared to <i>L. martensiana</i> and followed by <i>Oscillatoria</i> sp. and <i>Phormidium</i> sp. The lowest amount of MAAs and scytonemin was found in <i>P. tenue</i>. Subsequently, the LC-MS analysis of two potential cyanobacterial species, <i>L. majuscula</i> and <i>L. martensiana</i>, was performed using tyramine hydrochloride as an internal standard. The UV-B protective compounds such as shinorine, palythine, porphyra-334, palythenic acid, palythinol, and asterina were detected in mass spectrometry. These compounds were identified based on their mass-to-charge (m/z) ratios in a specific mass spectrum range and their retention times in the chromatogram peaks. The result of this study thus concludes that the cyanobacteria isolated from the Odisha coast are a promising source of UV absorbing pigments that can be explored for commercial production of UV sunscreen compounds.</p>

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Characterization of Photoprotective Sunscreen Molecules from Cyanobacteria of Odisha Coast

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • Satyabrata Dash,
  • Shubham Pradhan,
  • Bijayananda Sahoo,
  • Biswajit Rath

摘要

The purpose of this study was to screen the presence of UV protective compounds (MAAs and Scytonemin) in six species of cyanobacteria (Oscillatoria pseudogeminata, Oscillatoria boryana, Phormidium tenue, Phormidium bohneri, Lyngbya majuscula and Lyngbya martensiana) isolated from Odisha coast, India. The organisms were exposed to UV-B (280–315 nm wavelength) light for different time intervals (0–60 min) and then maintained in natural culture conditions. The amount of photoprotective compounds (MAAs and scytonemin) in test species was gradually increased in response to increased time duration of UV-B, depicting a peak value at 45 min followed by decrease at 60 min. Among the species of Lyngbya, L. majuscula was found to have maximum value of phtoprotectants compared to L. martensiana and followed by Oscillatoria sp. and Phormidium sp. The lowest amount of MAAs and scytonemin was found in P. tenue. Subsequently, the LC-MS analysis of two potential cyanobacterial species, L. majuscula and L. martensiana, was performed using tyramine hydrochloride as an internal standard. The UV-B protective compounds such as shinorine, palythine, porphyra-334, palythenic acid, palythinol, and asterina were detected in mass spectrometry. These compounds were identified based on their mass-to-charge (m/z) ratios in a specific mass spectrum range and their retention times in the chromatogram peaks. The result of this study thus concludes that the cyanobacteria isolated from the Odisha coast are a promising source of UV absorbing pigments that can be explored for commercial production of UV sunscreen compounds.