biology Article Antioxidant, Antimicrobial, and Bioactive Potential of Two New Haloarchaeal Strains Isolated from Odiel Salterns (Southwest Spain) Patricia Gómez-Villegas 1 , Javier Vigara 1 , Marta Vila 1, João Varela 2 , Luísa Barreira 2 and Rosa Léon 1,* 1 Laboratory of Biochemistry, Department of Chemistry, University of Huelva, Avda. de las Fuerzas Armadas s/n, 21071 Huelva, Spain;
[email protected] (P.G.-V.);
[email protected] (J.V.);
[email protected] (M.V.) 2 Centre of Marine Sciences, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal;
[email protected] (J.V.);
[email protected] (L.B.) * Correspondence:
[email protected]; Tel.: +34-95-921-9951 Received: 15 August 2020; Accepted: 17 September 2020; Published: 18 September 2020 Simple Summary: Halophilic archaea are microorganisms that inhabit in extreme environments for life, under salt saturation, high temperature and elevated UV radiation. The interest in these microorganisms lies on the properties of their molecules, that present high salt and temperature tolerance, as well as, antioxidant power, being an excellent source of compounds for several biotechnological applications. However, the bioactive properties from haloarcahaea remain scarcely studied compared to other groups as plants or algae, usually reported as good health promoters. In this work we describe the isolation and the molecular identification of two new haloarchaeal strains from Odiel salterns (SW Spain), and the antioxidant, antimicrobial and bioactive potential of their extracts. The results revealed that the extracts obtained with acetone presented the highest activities in the antioxidant, antimicrobial and anti-inflammatory assays, becoming a promising source of metabolites with applied interest in pharmacy, cosmetics and food industry.