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Related Concept Videos

Plant Hormones01:56

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Monitoring Plant Hormones During Stress Responses
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Phytohormone profiling in an evolutionary framework.

Vojtěch Schmidt1,2, Roman Skokan3, Thomas Depaepe4

  • 1Institute of Experimental Botany of the Czech Academy of Sciences, Rozvojová 263, 165 02, Prague 6, Czechia.

Nature Communications
|May 8, 2024
PubMed
Summary
This summary is machine-generated.

Phytohormones like auxin and cytokinins are widespread in green algae (Viridiplantae), challenging previous assumptions about their absence. This study reveals key differences in phytohormone profiles between algae and land plants.

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Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana
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Area of Science:

  • * Plant biology
  • * Biochemistry
  • * Evolutionary biology

Background:

  • * Charophyte green algae are closely related to land plants.
  • * Phytohormone regulation is typically absent in charophyte genomes.
  • * Endogenous phytohormone production has been sporadically reported in these algae.

Purpose of the Study:

  • * To comprehensively analyze multiple phytohormones in Viridiplantae, with a focus on charophytes.
  • * To investigate the presence and distribution of phytohormones across green algae and land plants.
  • * To understand phytohormone biosynthesis and metabolism in Streptophyta.

Main Methods:

  • * Analysis of multiple phytohormones in established algal cultures.
  • * Comparative analysis across Viridiplantae, focusing on charophytes and land plants.
  • * Phylogenetic guidance for data interpretation.

Main Results:

  • * Auxin, salicylic acid, ethylene, and cis-zeatin cytokinins are ubiquitous in Viridiplantae.
  • * Land plants possess trans-zeatin cytokinins and conjugates, absent in green algae.
  • * Charophytes produce jasmonates and abscisic acid occasionally; land plants consistently produce abscisic acid.
  • * Phytohormones like auxin, cytokinins, and salicylic acid are excreted into culture media.

Conclusions:

  • * Phytohormone biosynthesis and signaling pathways in angiosperms do not fully align with the observed capacities in Viridiplantae.
  • * The study provides insights into phytohormone evolution and metabolism across Streptophyta.
  • * Findings challenge the notion of phytohormone absence in early plant relatives.