The effect of UVA radiation on the production of photoprotective compounds and carotenoids in terrestrial cyanobacteria strains
DOI:
https://doi.org/10.24221/jeap.10.4.2025.7170.276-283Keywords:
anti-UV, Atlantic Forest, bioactive, scytonemin, secondary metabolitesAbstract
Cyanobacteria constitute a diverse group of photosynthetic prokaryotes with significant metabolic complexity, capable of synthesizing bioactive pigments and compounds with potential applications as natural bioproducts, including carotenoids, scytonemin, and mycosporine-like amino acids (MAAs). So, this study aims to explore and investigate the potential of terrestrial cyanobacteria isolated from the Brazilian Atlantic Forest in producing photoprotective (anti-UV) substances and the effect of UVA radiation on this production. Six strains of terrestrial cyanobacteria were isolated from the Brazilian Atlantic Forest and subjected to 24-hour UV-A irradiation. Afterward, the output of photoprotectors (scytonemim and MAAs) and carotenoids was evaluated through extraction by maceration with 100% acetone and 20% methanol, then measured using a spectrophotometry method. The investigation revealed significant production of scytonemin under UV-A irradiation in the Aphanothece sp. CCIBt 3609 and Plectolyngbya sp. CCAPE 79 strains. This study provides unprecedented data on scytonemin production in the genus Plectolyngbya and solidifies Aphanothece as a potential source of the anti-UV compound scytonemin.Downloads
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