Chronic low-dose rate irradiation induces transient hormesis effect on cyanobacterium <i>Limnospira indica</i>.

ABSTRACT: Cultures of Limnospira indica were exposed to low-dose rate γ-irradiation for 8 weeks to simulate 2 months of a Mars transit irradiation. Two experiments were conducted: in the first, 5% v/v inoculations were used over 2-week batches; in the second, 25% v/v inoculations over 1-week batches. The cultures were continuously illuminated (45 μmol photons m^-2 s^-1, LEDs). A transient hormesis effect was observed in experiment 1, with irradiated cultures showing higher dry weight (1.88 ± 0.05 g L^-1) than controls (1.70 ± 0.06 g L^-1) on day 14. Irradiated cultures also had fewer pigments. Experiment 2 showed similar, though less pronounced, results. These findings suggest that Limnospira indica would not be negatively affected by cosmic radi

SUBMITTER: Fahrion J 

PROVIDER: S-EPMC11926712 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature