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Enhancing astaxanthin yield in Phaffia rhodozyma: current trends and potential of phytohormones

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Abstract

Astaxanthin is an important ketocarotenoid with remarkable biological activities and high economic value. In recent times, natural astaxanthin production by microorganisms has attracted much attention particularly in pharmaceuticals, nutraceuticals, cosmetics, and food and feed industries. Though, currently, productivity is still low and has restricted scale-up application in the commercial market, microbial production of astaxanthin has enormous prospects as it is a greener alternative to the predominating chemical synthesis. Over the years, Phaffia rhodozyma has attracted immense interest particularly in the field of biovalorization and sustainable production of natural nutraceuticals as a promising source of natural astaxanthin since it is able to use agro-food waste as inexpensive nutrient source. Many research works have, thus, been devoted to improving the astaxanthin yield from this yeast. Considering that the yeast was first isolated from tree exudates, the use of phytohormones and plant growth stimulators as prospective stimulants of astaxanthin production in the yeast is promising. Besides, it has been shown in several studies that phytohormones could improve cell growth and astaxanthin production of algae. Nevertheless, this option is less explored for P. rhodozyma. The few studies that have examined the effect of phytohormones on the yeast and its astaxanthin productivity reported positive results, with phytohormones such as 6-benzylaminopurin and gibberellic acid resulting in increased expression of carotenogenesis genes. Although the evidence available is scanty, the results are promising.

Key points

Phaffia rhodozyma is a promising source of natural astaxanthin

For industrialization, astaxanthin productivity of P. rhodozyma still needs optimization

Phytohormones could potentially augment astaxanthin yield of P. rhodozyma

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Acknowledgements

The authors are grateful to K. L. Obydennov and T. A. Kalinina for their continuous support. The authors O.N.K. and E.G.K. acknowledge the financial support of the Russian Science Foundation (Grant 20-66-47017).

Funding

This work was partially supported by the Russian Science Foundation (Grant 20-66-47017).

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NC, ONK, and TVG conceptualized the idea; NC and ONK drafted the original manuscript; EGK and TVG reviewed and edited the manuscript for submission. All authors have read and agreed to the final version of the manuscript submited for publication.

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Correspondence to Osman N. Kanwugu.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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The authors declare no competing interests.

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Nutakor, C., Kanwugu, O.N., Kovaleva, E.G. et al. Enhancing astaxanthin yield in Phaffia rhodozyma: current trends and potential of phytohormones. Appl Microbiol Biotechnol 106, 3531–3538 (2022). https://doi.org/10.1007/s00253-022-11972-5

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  • DOI: https://doi.org/10.1007/s00253-022-11972-5

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