ArticleScientific reports2019
Fungal canker pathogens trigger carbon starvation by inhibiting carbon metabolism in poplar stems.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 37 citations in OpenAlex.
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- A Zinc Polyphenolic Compound Increases Maize Resistance Against Infection byPlants (Basel, Switzerland) · 2024Article
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- Infection mechanism of Botryosphaeria dothidea and the disease resistance strategies of Chinese hickory (Carya cathayensis).BMC plant biology · 2024Article
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- Editing Metabolism, Sex, and Microbiome: How Can We Help Poplar Resist Pathogens?International journal of molecular sciences · 2024Review
- Changes in the Histology of Walnut (International journal of molecular sciences · 2023Article
- Interaction of drought- and pathogen-induced mortality in Norway spruce and Scots pine.Plant, cell & environment · 2022Article
- Stem canker pathogenFrontiers in plant science · 2022Article
- Defense mechanisms promoting tolerance to aggressiveFrontiers in plant science · 2022Article
- Pathophysiology and transcriptomic analysis ofFrontiers in plant science · 2022Article
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- Effects of Mycorrhizal Colonization on Transcriptional Expression of the Responsive FactorFrontiers in plant science · 2021Article
- New insights into the evolution of host specificity of threeVirulence · 2020Article
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Authors and funding
8 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Carbon starvation is the current leading hypothesis of plant mortality mechanisms under drought stress; recently, it is also used to explain tree die-off in plant diseases. However, the molecular biology of the carbon starvation pathway is unclear. Here, using a punch inoculation system, we conducted transcriptome and physiological assays to investigate pathogen response in poplar stems at the early stages of Botryosphaeria and Valsa canker diseases. Transcriptome assays showed that the majority of differentially expressed genes (DEGs) in stem phloem and xylem, such as genes involved in carbon metabolism and transportation, aquaporin genes (in xylem) and genes related to the biosynthesis of secondary metabolites and the phenylpropanoid pathway (related to lignin synthesis), were downregulated at 7 days after inoculation (DAI). Results also showed that the expression of the majority of disease-resistance genes upregulated in poplar stems, which may be connected with the downregulation expression of the majority of WRKY family genes. Physiological assays showed that transpiration rate decreased but WUE (water use efficiency) increased the 3 and 7 DAI, while the net photosynthetic rate decreased at 11 DAI in Botryosphaeria infected poplars (ANOVA, P < 0.05). The NSC (non-structural carbohydrates) content assays showed that the soluble sugar content of stem phloem samples increased at 3, 7, and 11 DAI that might due to the impede of pathogen infection. However, soluble sugar content of stem xylem and root samples decreased at 11 DAI; in contrast, the starch content unchanged. Therefore, results revealed a chronological order of carbon related molecular and physiological performance: declination of genes involved in carbon and starch metabolism first (at least at 7 DAI), declination of assimilation and carbon reserve (at 11 DAI) second. Results implied a potential mechanism that affects the host carbon reserve, by directly inhibiting the expression of genes involved in carbon metabolism and transport.
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