New paper from Vlot lab.
Systemic acquired resistance networks amplify airborne defense cues.
Marion Wenig, Andrea Ghirardo, Jennifer H. Sales, Elisabeth S. Pabst, Heiko H. Breitenbach, Felix Antritter, Baris Weber, Birgit Lange, Miriam Lenk, Robin K. Cameron, Joerg-Peter Schnitzler, and A. Corina Vlot (2019).
Salicylic acid (SA)-mediated innate immune responses are activated in plants perceiving volatile monoterpenes. Here, we show that monoterpene-associated responses are propa- gated in feed-forward loops involving the systemic acquired resistance (SAR) signaling components pipecolic acid, glycerol-3-phosphate, and LEGUME LECTIN-LIKE PROTEIN1 (LLP1). In this cascade, LLP1 forms a key regulatory unit in both within-plant and between- plant propagation of immunity. The data integrate molecular components of SAR into sys- temic signaling networks that are separate from conventional, SA-associated innate immune mechanisms. These networks are central to plant-to-plant propagation of immunity, poten- tially raising SAR to the population level. In this process, monoterpenes act as microbe- inducible plant volatiles, which as part of plant-derived volatile blends have the potential to promote the generation of a wave of innate immune signaling within canopies or plant stands. Hence, plant-to-plant propagation of SAR holds significant potential to fortify future durable crop protection strategies following a single volatile trigger.
