Plant Pathogen Assay
Plant Pathogen Assay - Related Videos
08:45
Assay for Pathogen-Associated Molecular Pattern (PAMP)-Triggered Immunity (PTI) in Plants
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Cited by 23 •
2009
A cell death-based assay for PTI in Nicotiana benthamiana plants is described.
02:12
Co-Infiltration Assay for Screening Pathogen Effectors that Suppress Plant RNA Silencing
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2026
Source: Shi, J., et al. Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens. J. Vis. Exp. (2020)This video demonstrates a co-infiltration assay for identifying pathogen effector proteins that suppress RNA silencing in Nicotiana benthamiana 16c. A fluorescent reporter and a candidate effector gene are delivered into plant leaves via Agrobacterium. Normally, RNA silencing degrades reporter transcripts, reducing fluorescence. Suppressor effectors...
02:36
Single-Cell Analysis of Gene Expression from Plant-Extracted Pathogens
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2026
Source: Rufián, J. S., et al. Single-Cell Analysis of the Expression of Pseudomonas syringae Genes within the Plant Tissue. J. Vis. Exp. (2022).This video demonstrates a method for analyzing gene expression in plant-extracted pathogenic bacteria at the single-cell level using a fluorescently tagged transcription factor. Confocal imaging reveals heterogeneity in virulence gene expression, highlighting functional diversity within a clonal bacterial population.
11:42
Genetic Manipulation of the Plant Pathogen Ustilago maydis to Study Fungal Biology and Plant Microbe Interactions
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Cited by 32 •
2016
We describe a robust gene replacement strategy to genetically manipulate the smut fungus Ustilago maydis. This protocol explains how to generate deletion mutants to investigate infection phenotypes. It can be extended to modify genes in any desired way, e.g., by adding a sequence encoding a fluorescent protein tag.
13:37
Generation of Composite Plants in Medicago truncatula used for Nodulation Assays
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Cited by 7 •
2011
We demonstrate how hairy root composite plants can be used to study plant-rhizobium interactions and nodulation in the difficult-to-transform species Medicago truncatula.
FAQs
Culture-based testing depends on pathogen growth, whereas antibody-based assays recognize molecules associated with the pathogen. Nucleic acid assays instead amplify pathogen-specific sequences. These approaches examine different biological features, so the target organism and assay design determine which strategy is appropriate. Together, they provide complementary ways to detect or identify disease-causing organisms in plants and associated samples.
Assay design determines which pathogen feature is examined and what kind of result can be obtained. A test may support detection, identification, or measurement of pathogen abundance, depending on its target and analytical approach. Matching the design to the research question helps distinguish simple presence from distribution or abundance patterns relevant to diagnosis, epidemiology, or disease management.
The assay provides evidence about whether a disease-causing organism is present in the plant or an associated sample. This evidence can be compared with observed plant stress to evaluate whether infection is involved rather than assuming that every symptom has the same cause. Such distinctions improve diagnosis and help guide disease-management decisions.
Researchers first identify the diagnostic or experimental question, then select a suitable sample and assay strategy based on the target and design. The chosen approach may involve pathogen growth, antibody recognition, or amplification of pathogen-specific nucleic acid sequences. Results are then used to assess detection, identity, distribution, abundance, or host response in the relevant biological context.
These assays support a wide range of decisions, from diagnosing disease to studying pathogen distribution in epidemiological investigations. They also contribute to crop protection, breeding programs focused on resistance, quarantine decisions, and development of control strategies. Their value comes from connecting pathogen evidence with practical questions about prevention, management, and the spread of plant disease.
Measuring pathogen presence or abundance allows researchers to relate the organism to patterns of disease and distribution, while assessing host responses adds information about how the plant reacts. Considering both components strengthens studies of plant-pathogen interactions. This combined perspective can support epidemiology, evaluation of resistance in breeding, and investigation of strategies intended to control disease.