ArticleThe New phytologist2019
Salicylic acid activates poplar defense against the biotrophic rust fungus Melampsora larici-populina via increased biosynthesis of catechin and proanthocyanidins.
Article in The New phytologist, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers.
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Who cites it
77 citing papers in PubMed, 167 citations in OpenAlex.
- Integrative Transcriptomic and Metabolomic Analysis Reveals the Molecular Regulatory Mechanisms of Leaf Rust Resistance inBiology · 2026Article
- Spatial control of anthocyanin and proanthocyanidin production in tomato fruits by competitive MBW complexes to promote seed dispersal.Plant communications · 2026Article
- Proanthocyanidins: structure, biosynthesis, regulation, and structure-activity relationships.aBIOTECH · 2026Review
- Plant-Specific PB1 Domain Complex Mediates Poplar Defence and Is Targeted by Rust Fungus Secreted Protein MlpSD1.Molecular plant pathology · 2026Article
- Insights into stress responsiveness of MusaANS promoter- an anthocyanidin synthase gene from banana.Protoplasma · 2026Article
- Genome-wide identification of AP2/ERF transcription factors in Populus trichocarpa: structural analysis, expression patterns, and response to Melampsora larici-populina.BMC plant biology · 2026Article
- Welcome Pathogens: Transient Heat Dampens Immune Responses to Acibenzolar-S-Methyl in Apple Plants.Plant, cell & environment · 2026Article
- Overexpression of Anthocyanidin Reductase Increases Flavonoids Content to Combat Fusarium Wilt in the Root Xylem of Vernicia montana.Molecular plant pathology · 2026Article
- Divergent functions of three Kunitz trypsin inhibitor (KTI) proteins in herbivore defense in poplar.BMC plant biology · 2025Article
- Application of quercetin enhances tobacco resistance to Phytophthora nicotianae.Functional & integrative genomics · 2025Article
- Tonoplast sucrose transporter SUT4-dependent sugar partitioning modulates phenological transitions and reproductive success in poplar.The Plant journal : for cell and molecular biology · 2025Article
- Physiological, Biochemical, and Molecular Mechanisms of Resistance ofPlants (Basel, Switzerland) · 2025Article
- Transcriptional responses of Eucalyptus to infection by an aggressive leaf blight pathogen reveal the role of host secondary metabolites during pathogen germination.Plant molecular biology · 2025Article
- Deciphering organ-specific chemical changes following insect herbivory in Populus nigra using comparative metabolomics.Plant biology (Stuttgart, Germany) · 2025Article
- Salicylic acid and jasmonic acid in plant immunity.Horticulture research · 2025Article
- Biosynthesis and Regulatory Mechanisms of Plant Flavonoids: A Review.Plants (Basel, Switzerland) · 2025Review
- Review
- A Fungal Endophyte Alters Poplar Leaf Chemistry, Deters Insect Feeding and Shapes Insect Community Assembly.Ecology letters · 2025Article
- PbrMYB14 Enhances Pear Resistance toInternational journal of molecular sciences · 2025Article
- Dressed Up to the Nines: The Interplay of Phytohormones Signaling and Redox Metabolism During Plant Response to Drought.Plants (Basel, Switzerland) · 2025Review
17 more citing papers are in PubMed but not listed here.
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Authors and funding
7 authors at 4 institutions in 4 countries.
Funding
Abstract
Poplar trees synthesize flavan-3-ols (catechin and proanthocyanidins) as a defense against foliar rust fungi, but the regulation of this defense response is poorly understood. Here, we investigated the role of hormones in regulating flavan-3-ol accumulation in poplar during rust infection. We profiled levels of defense hormones, signaling genes, and flavan-3-ol metabolites in black poplar leaves at different stages of rust infection. Hormone levels were manipulated by external sprays, genetic engineering, and drought to reveal their role in rust fungal defenses. Levels of salicylic acid (SA), jasmonic acid, and abscisic acid increased in rust-infected leaves and activated downstream signaling, with SA levels correlating closely with those of flavan-3-ols. Pretreatment with the SA analog benzothiadiazole increased flavan-3-ol accumulation by activating the MYB-bHLH-WD40 complex and reduced rust proliferation. Furthermore, transgenic poplar lines overproducing SA exhibited higher amounts of flavan-3-ols constitutively via the same transcriptional activation mechanism. These findings suggest a strong association among SA, flavan-3-ol biosynthesis, and rust resistance in poplars. Abscisic acid also promoted poplar defense against rust infection, but likely through stomatal immunity independent of flavan-3-ols. Jasmonic acid did not confer any apparent defense responses to the fungal pathogen. We conclude that SA activates flavan-3-ol biosynthesis in poplar against rust infection.
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