The Small Key to the Treasure Chest: Endogenous Plant Peptides Involved in Symbiotic Interactions

Plants use tiny signaling molecules called peptides to communicate with beneficial soil organisms like nitrogen-fixing bacteria and fungi. These peptides act like chemical messengers that help plants decide when to allow these microbes to enter their roots and form helpful relationships. The review identifies over a dozen peptide families that control nodule formation, nutrient uptake, and immune responses, revealing how plants have evolved sophisticated mechanisms to balance protection against harmful pathogens while welcoming beneficial partners.