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. 2015 Jul 30;17(3):412–426. doi: 10.1111/mpp.12290

Figure 7.

figure

Proposed model of lipid transfer protein 3 (LTP3) modulation of abscisic acid (ABA) in the Arabidopsis–P seudomonas syringae pv. tomato interaction. Pathogen‐associated molecular patterns (PAMPs) induce PAMP‐triggered immunity (PTI) in the plant; specific avirulent effectors are recognized by immune receptors (R proteins) to induce effector‐triggered immunity (ETI). Salicylic acid (SA) plays an important role in the activation of plant general defence; pathogen‐modulated ABA signalling antagonizes SA‐mediated defences. LTP3 might be targeted by virulent effectors to promote ABA biosynthesis through AAO3, and thus down‐regulate the SA pathway. A positive regulatory loop exists between ABA and LTP3. LTP3 also negatively modulates SA through an ABA‐independent way.