Cultivation of carotenogenic yeasts in the presence of biological stress induced by selected strains of autotrophic microalgae

abstrakt

angličtina

The study dealt mainly with biological and nutritional stress in cultivations of carotenogenic yeasts and green microalgae. The increase in biomass was monitored depending on the cultivation environment, production of metabolites (mainly carotenoids and chlorophylls), and production of lipids and lipophilic substances. All types of these stresses tended to lead to an increase in production of both biomass and monitored metabolites. The experiments aimed on studying the production of biomass, carotenoids, chlorophylls, coenzyme Q, sterols, and lipidic substances. Biological stress was induced by co-cultivation of the algae a yeast within one medium. In the case of nutritional stress, it was about cultivation, when the medium was increased by a certain amount of specific macro elements or waste oil was added to the medium. The studied yeasts were Rhodosporidium toruloides, Rhodotorula kratochvilovae and Sporobolomyces pararoseus. Representatives of microalgae were Desmodesmus acutus, Desmodesmus armatus, Scenedesmus obliquus, Desmodesmus velitaris, Desmodesmus communis, Coccomyxa sp. Chlamydomonas reinhardtii and Chlorella minutissima. In general, the most successful co-cultivation multicultivator experiments are those with the yeast R. kratochvilovae. In the case of cultivations on waste oils, they were the best producers of biomass and metabolites co-cultivation experiments with the yeast R. toruloides. In microalgae experiments, it was found that nutritional stress in the form of added glycerol to the medium had inhibitory effect on the growth and metabolism of microalgae.

yeast, microalgae, waste substrates, carotenoids, free fatty acids, microorganism, food waste valorisation

SIKOROVÁ, P.; SZOTKOWSKI, M.; MÁROVÁ, I.

18. 5. 2023

Smolenice

1336-4839

34th Annual Conference on Yeasts, Book of abstracts

Slovenská republika

62

62

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