Biology

Transporter-mediated depletion of extracellular proline directly contributes to plant pattern-triggered immunity against a bacterial pathogen

C. J. Rogan, Y. Pang, et al.

Discover how plant-exuded proline serves as a strategic signal and nutrient for the bacterial pathogen *Pseudomonas syringae*. This groundbreaking research conducted by Conner J. Rogan and colleagues reveals the critical role of extracellular proline depletion in enhancing plant immunity, showcasing a potential new avenue for crop protection.

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Abstract

This study reveals that plant-exuded proline acts as a virulence-inducing signal and nutrient for the bacterial pathogen *Pseudomonas syringae*. MAMP-induced depletion of extracellular proline in Arabidopsis leaves directly contributes to pattern-triggered immunity (PTI) against *P. syringae*, a process requiring the amino acid transporter Lysine_Histidine_Transporter 1 (LHT1). Depletion of this single extracellular metabolite effectively limits pathogen growth, suggesting a broadly applicable plant defense mechanism.

Publisher

Nature Communications

Published On

Aug 15, 2024

Authors

Conner J. Rogan, Yin-Yuin Pang, Sophie D. Mathews, Sydney E. Turner, Alexandra J. Weisberg, Silke Lehmann, Doris Rentsch, Jeffrey C. Anderson

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