CONICET | Buscador de Institutos y Recursos Humanos

Brassinosteroids (BRs) are plant steroid hormones known mainly for promoting organgrowth through their combined effect on cell expansion and division. In addition, BRsregulate a broad spectrum of plant developmental and physiological responses, includingplant architecture, vascular differentiation, male fertility, flowering, senescence,photomorphogenesis and tolerance to biotic and abiotic stresses. Recently, a complete BRsignaling pathway has been defined in which BR signals are conveyed from the cellsurface to the nucleus through sequential signaling modules. A major challenge now is tounderstand precisely how such a linear signaling pathway controls the different BRregulatedactions. The current identification of direct targets of BRASSINAZOLERESISTANT1(BRZ1) and BR-INSENSITIVE-EMS-SUPPRESSOR1 (BES1)/BZR2transcription factors suggest that BR signaling pathway controls growth and interacts withother signaling pathways mainly at the transcriptional level.