Response of Endolithic Chroococcidiopsis Strains From the Polyextreme Atacama Desert to Light Radiation.

ABSTRACT: Cyanobacteria exposed to high solar radiation make use of a series of defense mechanisms, including avoidance, antioxidant systems, and the production of photoprotective compounds such as scytonemin. Two cyanobacterial strains of the genus Chroococcidiopsis from the Atacama Desert - which has one of the highest solar radiation levels on Earth- were examined to determine their capacity to protect themselves from direct photosynthetically active (PAR) and ultraviolet radiation (UVR): the UAM813 strain, originally isolated from a cryptoendolithic microhabitat within halite (NaCl), and UAM816 strain originally isolated from a chasmoendolithic microhabitat within calcite (CaCO₃). The oxidative stress induced by exposure to PAR or UVR + PAR was determined to observe their short

SUBMITTER: Casero MC 

PROVIDER: S-EPMC7848079 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature