Phytohormone profiling in an evolutionary framework

Vojtěch Schmidt, Roman Skokan (), Thomas Depaepe, Katarina Kurtović, Samuel Haluška, Stanislav Vosolsobě, Roberta Vaculíková, Anthony Pil, Petre Ivanov Dobrev, Václav Motyka, Dominique Straeten and Jan Petrášek ()
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Vojtěch Schmidt: Institute of Experimental Botany of the Czech Academy of Sciences
Roman Skokan: Institute of Experimental Botany of the Czech Academy of Sciences
Thomas Depaepe: Ghent University
Katarina Kurtović: Charles University
Samuel Haluška: Institute of Experimental Botany of the Czech Academy of Sciences
Stanislav Vosolsobě: Charles University
Roberta Vaculíková: Institute of Experimental Botany of the Czech Academy of Sciences
Anthony Pil: Ghent University
Petre Ivanov Dobrev: Institute of Experimental Botany of the Czech Academy of Sciences
Václav Motyka: Institute of Experimental Botany of the Czech Academy of Sciences
Dominique Straeten: Ghent University
Jan Petrášek: Institute of Experimental Botany of the Czech Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract The genomes of charophyte green algae, close relatives of land plants, typically do not show signs of developmental regulation by phytohormones. However, scattered reports of endogenous phytohormone production in these organisms exist. We performed a comprehensive analysis of multiple phytohormones in Viridiplantae, focusing mainly on charophytes. We show that auxin, salicylic acid, ethylene and tRNA-derived cytokinins including cis-zeatin are found ubiquitously in Viridiplantae. By contrast, land plants but not green algae contain the trans-zeatin type cytokinins as well as auxin and cytokinin conjugates. Charophytes occasionally produce jasmonates and abscisic acid, whereas the latter is detected consistently in land plants. Several phytohormones are excreted into the culture medium, including auxin by charophytes and cytokinins and salicylic acid by Viridiplantae in general. We note that the conservation of phytohormone biosynthesis and signaling pathways known from angiosperms does not match the capacity for phytohormone biosynthesis in Viridiplantae. Our phylogenetically guided analysis of established algal cultures provides an important insight into phytohormone biosynthesis and metabolism across Streptophyta.

Date: 2024
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DOI: 10.1038/s41467-024-47753-z

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