Antioxidant and anti-proliferative properties of extracts from heterotrophic cultures of .

This study explores the possibility to use the extremophilic microalga (strain 064) as a source of natural biomolecules with beneficial and protective effects on human health. was cultivated in heterotrophy conditions and cells extracts for their antioxidant and anti-proliferative properties were tested. extracts showed high antioxidant power tested through ABTS assay and revealed high glutathione and phycocyanin contents.

Determination of Reduced and Total Glutathione Content in Extremophilic Microalga .

Glutathione is an important molecule involved in the primary and secondary metabolism of all organisms. The Glutathione redox status is an indicator of the cellular redox state. Therefore, it is important to have precise methods on hand to determine the glutathione redox status in the cell.

Impact of Sulfur Starvation in Autotrophic and Heterotrophic Cultures of the Extremophilic Microalga Galdieria phlegrea (Cyanidiophyceae).

In plants and algae, sulfate assimilation and cysteine synthesis are regulated by sulfur (S) accessibility from the environment. This study reports the effects of S deprivation in autotrophic and heterotrophic cultures of Galdieria phlegrea (Cyanidiophyceae), a unicellular red alga isolated in the Solfatara crater located in Campi Flegrei (Naples, Italy), where H2S is the prevalent form of gaseous S in the fumarolic fluids and S is widespread in the soils near the fumaroles. This is the first report on the effects of S deprivation on a sulfurous microalga that is also able to grow heterotrophically in the dark.

Sulfur Deprivation Results in Oxidative Perturbation in Chlorella sorokiniana (211/8k).

Sulfur deficiency in plant cells has not been considered as a potential abiotic factor that can induce oxidative stress. We studied the antioxidant defense system of Chlorella sorokiniana cultured under sulfur (S) deficiency, imposed for a maximum period of 24 h, to evaluate the effect of an S shortage on oxidative stress. S deprivation induced an immediate (30 min) but transient increase in the intracellular H2O2 content, which suggests that S limitation can lead to a temporary redox disturbance.