ArticlePlant signaling & behavior2015
The MeJA-inducible copper amine oxidase AtAO1 is expressed in xylem tissue and guard cells.
Article in Plant signaling & behavior, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 15 citations in OpenAlex.
- The tree of life of copper-containing amine oxidases.Frontiers in plant science · 2025Article
- Transcriptomic and co-expression network analyses on diverse wheat landraces identifies candidate master regulators of the response to early drought.Frontiers in plant science · 2023Article
- Distinct role of AtCuAOβ- and RBOHD-driven HFrontiers in plant science · 2023Article
- Article
- Plant Copper Amine Oxidases: Key Players in Hormone Signaling Leading to Stress-Induced Phenotypic Plasticity.International journal of molecular sciences · 2021Review
- Leaf-Wounding Long-Distance Signaling Targets AtCuAOβ Leading to Root Phenotypic Plasticity.Plants (Basel, Switzerland) · 2020Article
- iTRAQ-Based Quantitative Proteomic Analysis of the Arabidopsis MutantInternational journal of molecular sciences · 2020Article
- Genome-Wide Identification of Seven Polyamine Oxidase Genes inFrontiers in plant science · 2020Article
- The Copper Amine Oxidase AtCuAOδ Participates in Abscisic Acid-Induced Stomatal Closure in Arabidopsis.Plants (Basel, Switzerland) · 2019Article
- Antagonistic interaction between jasmonic acid and cytokinin in xylem development.Scientific reports · 2017Article
- Copper-Containing Amine Oxidases and FAD-Dependent Polyamine Oxidases Are Key Players in Plant Tissue Differentiation and Organ Development.Frontiers in plant science · 2016Review
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Authors and funding
8 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Copper amine oxidases oxidize the polyamine putrescine to 4-aminobutanal with the production of the plant signal molecule hydrogen peroxide (H2O2) and ammonia. The Arabidopsis (Arabidopsis thaliana) gene At4g14940 (AtAO1, previously referred to as ATAO1) encodes an apoplastic copper amine oxidase expressed in lateral root cap cells and developing xylem, especially in root protoxylem and metaxylem precursors. In our recent study, we demonstrated that AtAO1 expression is strongly induced in the root vascular tissues by the wound-signal hormone methyl jasmonate (MeJA). Furthermore, we also demonstrated that the H2O2 derived by the AtAO1-driven oxidation of putrescine, mediates the MeJA-induced early protoxylem differentiation in Arabidopsis roots. H2O2 may contribute to protoxylem differentiation by signaling developmental cell death and by acting as co-substrate in peroxidase-mediated cell wall stiffening and lignin polymerization. Here, by the means of AtAO1 promoter::green fluorescent protein-β-glucuronidase (AtAO1::GFP-GUS) fusion analysis, we show that a strong AtAO1 gene expression occurs also in guard cells of leaves and flowers. The high expression levels of AtAO1 in tissues or cell types regulating water supply and water loss may suggest a role of the encoded protein in water balance homeostasis, by modulating coordinated adjustments in anatomical and functional features of xylem tissue and guard cells during acclimation to adverse environmental conditions.
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