Hormonal cross-talk in plant development and stress responses

Abstract

In contrast to animals, plants can continuously cease and resumegrowth. This flexibility in their architecture and growth patterns ispartly achieved by the action of plant hormones. Plant hormonesare structurally diverse compounds that act usually at nanomolarconcentrations and include five groups of the so-called "clas-sic" hormones, namely auxins, cytokinins, gibberellins, abscisicacid, and ethylene. Jasmonates, salicylates, strigolactones, brassi-nosteroids, polyamines, and some peptides were recognized asnew families of plant hormones. Hormones build a signalingnetwork and mutually regulate several signaling and metabolicsystems, which are essential both for plant development and plantresponses to biotic and abiotic stresses. Although earlier workgreatly advanced our knowledge of how hormones affect plantgrowth and development and stress responses focusing on a singlecompound, it is now evident that physiological processes are reg-ulated in a complex way by the cross-talk of several hormones.In this Research Topic, we aim at collecting a comprehensiveset of original research and review papers focused on hormonalcrosstalk in plants.