SECONDARY CAROTENOID ACCUMULATION IN SCENEDESMUS KOMAREKII (CHLOROPHYCEAE, CHLOROPHYTA)
Abstract
As Scenedesmus komarekii Hegewald was cultured under high light intensity and nitrogen limitation, the color of cells progressed from green to brown, and finally through orange to brick red. The secondary carotenoids astaxanthin and canthaxanthin, as well as apolar carotenoids, were detected in the brown and orange cells. These carotenoids were contained in lipoidal globules that were first formed at the periphery of the cell and progressively propagated toward its inside, eventually filling most of it. The chloroplast was single and parietal in the green cells. As the cells turned brown, the chloroplast divided into several small lobes and was pushed toward the interior by the accumulating lipoidal globules. Sometimes the outer layer of the wall of the brown cell developed one or two diametrically opposed swellings. Once the cells became orange or red, neither lipoidal globules nor any major organelles were distinguishable. The cell wall in the orange cells became thick because of the formation of electron‐dense granules between its outer and inner layers. The mode of the secondary carotenoid accumulation in S. komarekii differs from that of Haematococcus, an alga well known for its ability to accumulate secondary carotenoids, but resembles that of “Chlorella”zofingiensis (=Mychonastes zofingiensis (Dönz) Kalina et Punčochářová).
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Scenedesmus komareckii and aplanospores of D. salina enhance the accumulation of canthaxanthin.
“Some other microalgae, such as Scenedesmus komareckii (Hanagata, 1999) and aplanospores of D. salina (Borowitzka and Huisman, 1993) enhance the accumulation of canthaxanthin.”
From Microalgae Metabolites: A Rich Source for Food and Medicine (2019) · cites this paper as Hanagata, 1999
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- Authors
- Hanagata, N., & Dubinsky, Z.
- Affiliations
- Research Center for Advanced Science and Technology, The University of Tokyo (JP)
- Bar-Ilan University (IL)
- Venue
- Journal of Phycology
- Publisher
- Wiley
- Published
- 1999-10
- Volume
- 35
- Issue
- 5
- Pages
- 960-966
- ISSN
- 0022-3646 (ISSN-L)
- 1529-8817
- OpenAlex
- W2036036862
- Cited by
- 43
- References
- 0
- Citations by year
- 2025: 3 · 2024: 1 · 2021: 1 · 2020: 5 · 2019: 5 · 2018: 4 · 2017: 1 · 2016: 2 · 2015: 4 · 2014: 3 · 2013: 1
- FWCI
- 0.88
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Phycology (publishedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant biochemistry and biosynthesis
- Keywords
- secondary carotenoids, astaxanthin, canthaxanthin, nitrogen limitation, high light, chloroplast division, cell wall thickening, Haematococcus, Chlorella
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