Impact of elevated temperature on immunity-related hormone signaling in tomato plants

Abstract

Molecular mechanisms governing the plant-pathogen-environment "disease triangle" are starting to emerge, although less so in agriculturally important species like tomato (Solanum lycopersicum). Here we analyzed defence hormone responses of tomato plants infected with the bacterial pathogen Pseudomonas syringae pv. tomato (Pst) DC3000 under two different temperatures. Our results showed that tomato plants exhibited temperature-sensitive expression of marker genes associated with salicylic acid (SA), jasmonic acid (JA) and abscisic acid (ABA) pathways, but not ethylene (ET). Our findings highlight the complexity of plant- microbe interactions and the importance of considering environmental conditions when studying plant defence responses.