Hormone profiles in microalgae: Gibberellins and brassinosteroids
Open accessAbstract
Endogenous gibberellins and brassinosteroids were quantified in 24 axenic microalgae strains from the Chlorophyceae, Trebouxiophyceae, Ulvophyceae and Charophyceae microalgae strains after 4 days in culture. This is the first report of endogenous gibberellins being successfully detected in microalgae. Between 18 and 20 gibberellins were quantified in all strains with concentrations ranging from 342.7 pg mg(-1) DW in Raphidocelis subcapitata MACC 317-4746.1 pg mg(-)(1) DW in Scotiellopsis terrestris MACC 44. Slower growing strains (S. terrestris MACC 44, Gyoerffyana humicola MACC 334, Nautococcus mamillatus MACC 716 and Chlorococcum ellipsoideum MACC 712) exhibited the highest gibberellin contents while lowest levels of gibberellins were found in faster growing strains (R. subcapitata MACC 317 and Coelastrum excentrica MACC 504). In all strains, the active gibberellin detected in the highest concentration was GA6, the predominant intermediates were GA15 and GA53 and the main biosynthetic end products were GA13 and GA51. Gibberellin profiles were similar in all strains except for the presence/absence of GA12 and GA12ald. To date this is the second report of endogenous brassinosteroids in microalgae. Brassinosteroids were detected in all 24 strains with concentrations ranging from 117.3 pg mg(-)(1) DW in R. subcapitata MACC 317-977.8 pg mg(-)(1) DW in Klebsormidium flaccidum MACC 692. Two brassinosteroids, brassinolide and castasterone were determined in all the strains. Generally, brassinolide occurred in higher concentrations than castasterone.
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In 24 microalgae strains, cis-zeatin is the most common cytokinin.
“Concentrations of auxins and cytokinins were analyzed in 24 microalgae strains with cis-zeatin as the most common cytokinin [124].”
From A Holistic Approach to Circular Bioeconomy Through the Sustainable Utilization of Microalgal Biomass for Biofuel and Other Value-Added Products (2024) · cites this paper as [124]
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- Authors
- Stirk, W. A., Bálint, P., Tarkowská, D., Novák, O., Strnad, M., Ördög, V., & van Staden, J.
- Affiliations
- University of KwaZulu-Natal (ZA)
- University of Sopron (HU)
- Czech Academy of Sciences, Institute of Experimental Botany (CZ)
- Centre of the Region Haná for Biotechnical and Agricultural Research (CZ)
- Corresponding author
- Stirk, W.A.
- Venue
- Plant Physiology and Biochemistry
- Publisher
- Elsevier BV
- Published
- 2013-09
- Volume
- 70
- Pages
- 348-353
- ISSN
- 0981-9428 (ISSN-L)
- OpenAlex
- W1994428179
- Cited by
- 166
- References
- 25
- Citations by year
- 2026: 7 · 2025: 20 · 2024: 22 · 2023: 22 · 2022: 16 · 2021: 15 · 2020: 19 · 2019: 15 · 2018: 6 · 2017: 4 · 2016: 4 · 2015: 6 · 2014: 6 · 2013: 4
- FWCI
- 2.98
- Type
- journal article
- Language
- en
- Open access
- green
- hdl.handle.net
- Licence
- public-domain
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- Locations
- Plant Physiology and Biochemistry (publishedVersion)
- PubMed (publishedVersion)
- ASEP (submittedVersion, public-domain)
- Funders
- University of KwaZulu-Natal
- National Research Foundation
- EU funding Operational Program Research and Development for Innovations (ED0007/01/01)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant biochemistry and biosynthesis
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Growth Enhancement Techniques
- Keywords
- gibberellin, brassinosteroids, microalgae, endogenous plant hormones, Chlorophyceae, Trebouxiophyceae, Ulvophyceae, Charophyceae, brassinolide, castasterone, Raphidocelis subcapitata, Klebsormidium flaccidum, growth rate
- MeSH terms
- Chlorophyta, Cholestanols, Gibberellins, Plant Growth Regulators, Steroids, Heterocyclic, Charophyceae, Microalgae, Brassinosteroids
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