The effect of UVA radiation on the production of photoprotective compounds and carotenoids in terrestrial cyanobacteria strains
DOI:
https://doi.org/10.24221/jeap.10.4.2025.7170.276-283Palavras-chave:
anti-UV, Atlantic Forest, bioactive, scytonemin, secondary metabolitesResumo
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). The study aimed to explore the potential of terrestrial cyanobacteria isolated from the Brazilian Atlantic Forest to produce photoprotective (anti-UV) substances and to investigate the effect of UVA radiation on this production. Six strains of terrestrial cyanobacteria were isolated from the Brazilian Atlantic Forest and subjected to 24 hours of UV-A irradiation. Afterward, the output of photoprotectors (scytonemim and MAAs) and carotenoids was evaluated by maceration with 100% acetone and 20% methanol, then measured by spectrophotometry. 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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