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Biomass and carotenoid pigment production by patagonian native yeasts
Authors:Diego Libkind  María van Broock
Institution:(1) Laboratorio de Microbiología Aplicada y Biotecnología, Universidad Nacional del Comahue, Centro Regional Universitario Bariloche (CRUB) – CONICET (Consejo Nacional de Investigaciones Científicas y Tecnológicas), Quintral 1250, 8400 Bariloche, Río Negro, Argentina
Abstract:Summary New yeast isolates from unexplored Patagonian habitats were studied for the production of biomass and carotenoids as the first step towards the selection of hyper-producing strains and the design of a process optimization approach. Patagonian yeast isolates considered as potential biomass and carotenoid sources were studied using ammonium sulphate and urea as nitrogen sources in semi-synthetic medium (MMS), and agro-industrial byproducts (cane molasses, corn syrup, raw malt extract) as carbon sources. Maximum pigment production (300 μg g−1) was achieved by Rhodotorula mucilaginosa CRUB 0195 and by novel species Cryptococcus sp. CRUB 1046. β-carotene, torulene and torularhodin were the major carotenoids found.
Keywords:Agro-industrial byproducts  carotenoids  Patagonian natural environments  screening  yeast
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