Plant-Microbe Interactions and Immunity

Plants are not passive hosts: they actively sense microorganisms through pattern recognition receptors that detect molecular signatures shared across pathogens, triggering layered defense responses that can spread systemically throughout the plant. The soil surrounding roots — the rhizosphere — is a dense arena of chemical negotiation, where root exudates shape microbial communities that include both pathogens and growth-promoting bacteria capable of priming plant immunity through hormonal pathways involving salicylate, jasmonate, and ethylene. Understanding how plants distinguish harmful from beneficial microbes, and how systemic acquired resistance is established and maintained, remains an active area of inquiry with direct consequences for developing crops that require fewer chemical inputs. Researchers are also working to clarify how soil microbial community composition feeds back on plant immune state — a question that sits at the intersection of ecology, molecular biology, and agronomy.

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Keywords

Plant ImmunityRhizosphere InteractionsMicrobial PathogensPattern Recognition ReceptorsSystemic Acquired ResistancePlant Growth-Promoting Bacteria