Cited by 201Plant Molecular Biology ResearchAlgal biology and biofuel productionAquatic Ecosystems and Phytoplankton Dynamics

Auxin and cytokinin relationships in 24 microalgal strains 1

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Stirk, Wendy A., Ördög, Vince, Novák, Ondřej, Rolčík, Jakub, Strnad, Miroslav, Bálint, Péter, van Staden, Johannes·2013·Journal of Phycology

Abstract

Endogenous auxins and cytokinins were quantitated in 24 axenic microalgal strains from the Chlorophyceae, Trebouxiophyceae, Ulvophyceae, and Charophyceae. These strains were in an exponential growth phase, being harvested on day 4. Acutodesmus acuminatus Mosonmagyaróvár Algal Culture Collection‐41 ( MACC ) produced the highest biomass and Chlorococcum ellipsoideum MACC ‐712 the lowest biomass. The auxins, indole‐3‐acetic acid ( IAA ) and indole‐3‐acetamide ( IAM ) were present in all microalgal strains. No other auxin conjugates were detected. IAA and IAM concentrations varied greatly, ranging from 0.50 to 71.49 nmol IAA · g −1 DW and 0.18 to 99.83 nmol IAM · g −1 DW , respectively. In 19 strains, IAA occurred in higher concentrations than IAM . Nineteen cytokinins were identified in the microalgal strains. Total cytokinin concentrations varied, ranging from 0.29 nmol · g −1 DW in Klebsormidium flaccidum MACC ‐692 to 21.40 nmol · g −1 DW in Stigeoclonium nanum MACC ‐790. The general trend was that cis‐ zeatin types were the predominant cytokinins; isopentenyladenine‐type cytokinins were present in moderate concentrations, while low levels of trans‐ zeatin‐type and very low levels of dihydrozeatin‐type cytokinins were detected. Ribotides were generally the main cytokinin conjugate forms present with the cytokinin free bases and ribosides present in similar but moderate levels. The levels of O‐glucosides were low. Only one N‐glucoside was detected, being present in nine strains in very low concentrations. In 15 strains, the auxin content was 2‐ to 4‐fold higher than the cytokinin content.

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Crossref · 10.1111/jpy.12061

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Authors
Stirk, W. A., Ördög, V., Novák, O., Rolčík, J., Strnad, M., Bálint, P., & van Staden, J.
Affiliations
  • University of KwaZulu-Natal (ZA)
  • University of Sopron (HU)
  • Czech Academy of Sciences, Institute of Experimental Botany (CZ)
  • Laboratory of Growth Regulators Palacký University & Institute of Experimental Botany AS CR Šlechtitelů 11 Olomouc CZ‐783 71 Czech Republic
  • Centre of the Region Haná for Biotechnical and Agricultural Research (CZ)
  • Research Centre for Plant Growth and Development, School of Life Sciences University of KwaZulu‐Natal Pietermaritzburg P/Bag X01 Scottsville 3209 South Africa
Corresponding author
Stirk, Wendy A.
Venue
Journal of Phycology
Publisher
Wiley
Published
2013-04-03
Volume
49
Issue
3
Pages
459-467
ISSN
  • 0022-3646 (ISSN-L)
  • 1529-8817
OpenAlex
W2113514461
Cited by
201
References
39
Citations by year
2026: 8 · 2025: 18 · 2024: 18 · 2023: 37 · 2022: 22 · 2021: 25 · 2020: 18 · 2019: 13 · 2018: 11 · 2017: 7 · 2016: 6 · 2015: 6 · 2014: 6 · 2013: 5
FWCI
9.24
Type
journal article
Language
en
Open access
Locations
  • Journal of Phycology (publishedVersion)
  • PubMed (publishedVersion)
  • ASEP (publishedVersion, other-oa)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • 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
Keywords
auxin, cytokinins, microalgae, indole-3-acetic acid, indole-3-acetamide, zeatin, isopentenyladenine, O-glucosides, N-glucosides, Chlorophyceae, Trebouxiophyceae, Ulvophyceae, Charophyceae, auxin/cytokinin ratio

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