Potential of Carotenoids in Aquatic Yeasts as a Phylogenetically Reliable Marker and Natural Colorant for Aquaculture

Abstract

Apart from Xanthophyllomyces dendrorhous, pink colony-forming yeasts have not been examined as a pigmentation source in captive animals. In this study, aquatic yeasts were screened with a view to abundances of carotenoids. Phylogenetic analyses of these caroetnoid-rich yeasts based on large subunit ribosomal RNA gene (LSU rDNA) partial sequences showed that all belonged to the order Sporidiobolales. Both the qualitative and the quantitative differences in carotenoids between the yeasts appeared to be consistent with their phylogenetic affiliations. This information might be useful in the selection of pigment-rich yeasts containing specific carotenoids from a large number of strains. We also found, for the first time, the potential of a pigmentrich Rhodotorula strain as a colorant for aquaculture. The integuments of tilapia and carp fed the alkalitreated cells of strain Rhodotorula dairenensis Sag 17 were pigmented after 3 months of cultivation. The fish integuments retained the yeast carotenes shortly after the start of feeding, and were converted to the fishspecific xanthophylls in vivo.

Yeast Rhodoturula glutinis as a modulator of innate immune and oxidative stress-related genes in Oreochromis niloticus cultured in a Biofloc system

“…Yeasts, in addition, are considered part of the normal microbiota of both wild and farmed fish (Caruffo et al 2015, Ceseña et al 2021. In addition, its ability for artificial colonization of the intestinal host has been demonstrated (Ueno et al 2011, Navarrete & Tovar-Ramírez 2014. Therefore, numerous studies have evaluated the effects of live yeast or its subcomponents and derivatives alone or in combination on the growth of aquatic animals (Navarrete & Tovar-Ramírez 2014, Chen et al 2019, Ge et al 2021.…”

“…It has been reported as part of the normal microbiota of wild and farmed fish cultures (Gatesoupe 2007, Kot et al 2016, Gerelmaa et al 2018, Chen et al 2019. Strains belonging to this genus have been used in aquaculture to promote immune response, antioxidant capacity, disease resistance, and increase pigmentation in species such as salmon, sea cucumber, and tilapia (Ueno et al 2011, 2019.…”

Effects of Rhodotorula mucilaginosa on the Immune Function and Gut Microbiota of Mice

“…A1-1, A1-2, A1-3, A1-4, and A1-5 indicate that group A1 was sequenced three times; B1-1, B1-2, B1-3, B1-4, and B1-5 indicate that group B1 was sequenced three times. (Ueno et al, 2011).…”

“…It has nutritive functions, immunity-promoting effects, antioxidant functions, and high tinting strength for animals. Production of microecologics with Rhodotorula can have a broad market and bring great economic benefits (Ueno et al, 2011 ).…”

Microalgae, Seaweeds and Aquatic Bacteria, Archaea, and Yeasts: Sources of Carotenoids with Potential Antioxidant and Anti-Inflammatory Health-Promoting Actions in the Sustainability Era

“…Many aquatic yeasts can accumulate intracellularly high levels of carotenoids [ 225 ]; thus, they can be considered a natural and renewable source for carotenoid production.…”