Untangling the role of ethylene beyond fruit development and ripening: A physiological and molecular perspective focused on the Monilinia-peach interaction

•Ethylene dictates fruit development/ripening and response to a/biotic stresses.•Ethylene arising from the peach-Monilinia spp. depends on the fruit developmental stage.•The species and virulence of Monilinia are key determining ethylene modulation/response.•Monilinia spp. produce ethylene under certain growing conditions.•An interplay exists between ethylene, ROS and polyamines during host-pathogen interactions.