Plants grow on brassinosteroids

Curr Opin Plant Biol. 2011 Oct;14(5):530-7. doi: 10.1016/j.pbi.2011.05.004. Epub 2011 Jul 27.

Abstract

Brassinosteroids (BRs) are plant steroid hormones known mainly for promoting organ growth through their combined effect on cell expansion and division. In addition, BRs regulate a broad spectrum of plant developmental and physiological responses, including plant architecture, vascular differentiation, male fertility, flowering, senescence, photomorphogenesis and tolerance to biotic and abiotic stresses. Recently, a complete core BR signaling pathway was defined in which BR signals are conveyed from the cell surface to the nucleus through sequential signaling modules. A major challenge now is to understand precisely how this signaling pathway controls the different BR-regulated actions. The current identification of direct targets of BRASSINAZOLE-RESISTANT1 (BRZ1) and BR-INSENSITIVE-EMS-SUPPRESSOR1 (BES1)/BZR2 transcription factors suggests that BR signaling pathway controls growth and interacts with other signaling pathways mainly at the transcriptional level.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Arabidopsis Proteins / metabolism
  • Brassinosteroids / metabolism*
  • DNA-Binding Proteins
  • Nuclear Proteins / metabolism
  • Plant Development*
  • Plant Growth Regulators / metabolism*
  • Plants / metabolism
  • Signal Transduction
  • Transcription Factors / metabolism

Substances

  • Arabidopsis Proteins
  • BZR1 protein, Arabidopsis
  • Brassinosteroids
  • DNA-Binding Proteins
  • Nuclear Proteins
  • Plant Growth Regulators
  • Transcription Factors