Raman spectroscopic analysis of a desert cyanobacterium Nostoc sp. in response to UVB radiation

  • Wang G
  • Hao Z
  • Huang Z
 et al. 
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Cyanobacteria are capable of tolerating environmental extremes. To survive in extreme environments, cyanobacteria have developed the capability to adapt to a variety of stresses. For example, cyanobacteria have adopted a number of strategies with which to survive UV stress, including expression of UV-screening pigments and antioxidant systems. We have previously shown that several antioxidants are significantly expressed in Nostoc sp. by UVB irradiation. We report here that the content of UV-responsive biomarkers such as β-carotene and scytonemin can be easily detected by Fourier transform Raman spectroscopy with use of a small sample size and that the content of β-carotene is dependant on the UVB intensity and exposure time. Our results indicate that Raman spectroscopy may be a helpful tool to analyze UV-protective molecules of cyanobacterium in astrobiological studies without access to large sample sizes and complicated extractions, which are needed by other analytical techniques such as high-performance liquid chromatography and mass spectrometry. © Copyright 2010, Mary Ann Liebert, Inc. 2010.

Author-supplied keywords

  • 783-788.
  • Nostoc sp.-UVB-Raman spectra-b-carotene. Astrobiol

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  • G Wang

  • Z Hao

  • Z Huang

  • L Chen

  • X Li

  • C Hu

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