ArticlePlant physiology2010
Auxin metabolism and function in the multicellular brown alga Ectocarpus siliculosus.
Article in Plant physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.
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44 citing papers in PubMed, 117 citations in OpenAlex.
- Tryptophanol enhances nitrogen assimilation in marine diatoms.Nature communications · 2026Article
- 3-D Growth: the diversity of strategies in brown algae.Annals of botany · 2025Review
- Phosphoinositide Signaling and Actin Polymerization Are Critical for Tip Growth in the Marine Red AlgaPlants (Basel, Switzerland) · 2025Article
- Harnessing photosynthetic microorganisms for enhanced bioremediation of microplastics: A comprehensive review.Environmental science and ecotechnology · 2024Review
- Cell-Autonomous and Non-Cell-Autonomous Mechanisms Concomitantly Regulate the Early Developmental Pattern in the KelpPlants (Basel, Switzerland) · 2024Article
- Phytohormone profiling in an evolutionary framework.Nature communications · 2024Article
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- Exchange or Eliminate: The Secrets of Algal-Bacterial Relationships.Plants (Basel, Switzerland) · 2024Review
- Genetic evidence for algal auxin production iniScience · 2024Article
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- The birth of a giant: evolutionary insights into the origin of auxin responses in plants.The EMBO journal · 2023Review
- Indole-3-acetic acid as a cross-talking molecule in algal-bacterial interactions and a potential driving force in algal bloom formation.Frontiers in microbiology · 2023Review
- Article
- The Active Phytohormone in Microalgae: The Characteristics, Efficient Detection, and Their Adversity Resistance Applications.Molecules (Basel, Switzerland) · 2021Review
- Evolution and diversity of the angiosperm anther: trends in function and development.Plant reproduction · 2021Review
- On the Evolutionary Origins of Land Plant Auxin Biology.Cold Spring Harbor perspectives in biology · 2021Review
- Article
- Review
- The Phylogeny of Class B Flavoprotein Monooxygenases and the Origin of the YUCCA Protein Family.Plants (Basel, Switzerland) · 2020Article
- Old Town Roads: routes of auxin biosynthesis across kingdoms.Current opinion in plant biology · 2020Review
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Authors and funding
11 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Ectocarpus siliculosus is a small brown alga that has recently been developed as a genetic model. Its thallus is filamentous, initially organized as a main primary filament composed of elongated cells and round cells, from which branches differentiate. Modeling of its early development suggests the involvement of very local positional information mediated by cell-cell recognition. However, this model also indicates that an additional mechanism is required to ensure proper organization of the branching pattern. In this paper, we show that auxin indole-3-acetic acid (IAA) is detectable in mature E. siliculosus organisms and that it is present mainly at the apices of the filaments in the early stages of development. An in silico survey of auxin biosynthesis, conjugation, response, and transport genes showed that mainly IAA biosynthesis genes from land plants have homologs in the E. siliculosus genome. In addition, application of exogenous auxins and 2,3,5-triiodobenzoic acid had different effects depending on the developmental stage of the organism, and we propose a model in which auxin is involved in the negative control of progression in the developmental program. Furthermore, we identified an auxin-inducible gene called EsGRP1 from a small-scale microarray experiment and showed that its expression in a series of morphogenetic mutants was positively correlated with both their elongated-to-round cell ratio and their progression in the developmental program. Altogether, these data suggest that IAA is used by the brown alga Ectocarpus to relay cell-cell positional information and induces a signaling pathway different from that known in land plants.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.