Pathogen Interactions in Legume Root Systems
Summary
Legumes are fundamental to sustainable agriculture owing to their capacity to establish nitrogen-fixing symbioses, yet their roots remain susceptible to a complex array of soil-borne pathogens. Fungi and oomycetes such as Fusarium, Phoma and Pythium invade through the root epidermis, colonise cortical tissues and disrupt vascular function, leading to impaired water and nutrient uptake and significant yield losses. Host roots respond through physical barriers, including cell-wall reinforcement, and through biochemical defences such as reactive oxygen species production and the secretion of antimicrobial compounds. These local defences are coordinated with systemic signalling initiated by recognition of pathogen-associated molecular patterns and effectors. Concurrently, beneficial rhizosphere microbes can prime root immunity and outcompete pathogens, underscoring the importance of the wider soil microbiome. Integrating insights from molecular genetics, metabolomics and microbial ecology is vital for breeding resistant cultivars and for developing integrated disease-management practices that support food security on a global scale.
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Pathogen Interactions in Legume Root Systems publication trend
The graph below shows the total number of articles in pathogen interactions in legume root systems across all publications each year (not limited to Nature Index journals).
Technical terms
Rhizosphere: The soil region immediately surrounding plant roots, rich in microbial interactions and chemical exchanges.
Necrotroph: A pathogen that kills host tissue and derives nutrients from the resulting dead cells.
Transcriptome: The entire set of RNA molecules transcribed from the genome under specific conditions.
Quantitative trait locus (QTL): A segment of DNA associated with variation in a measurable trait, such as disease resistance.
Receptor-like kinase: A membrane-bound protein that detects external signals and initiates intracellular defence responses.
References
- Virulent Fusarium isolates with diverse morphologies show similar invasion and colonization strategies in alfalfa. Frontiers in Plant Science (2024).
- Transcriptome analysis of resistant and susceptible Medicago truncatula genotypes in response to spring black stem and leaf spot disease. BMC Plant Biology (2024).
- Alfalfa Spring Black Stem and Leaf Spot Disease Caused by Phoma medicaginis: Epidemic Occurrence and Impacts. Microorganisms (2024).
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