bioRxivPlant BiologyPreprint
The parasitic plant Phtheirospermum japonicum suppresses host immunity
Abstract
The parasitic plant Phtheirospermum japonicum invades the host root xylem to extract nutrients and water. We show that this invasion triggers a phosphate-starvation response in its host, Arabidopsis thaliana, causing systemic suppression of immunity, including defence responses against microbial pathogens. Consequently, plants infested by xylem-feeding parasitic plants were more susceptible to secondary infections, underscoring the need to consider multitrophic interactions when improving crop resilience to parasitic infestation.
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