Journal Article

Growth control: brassinosteroid activity gets context

Amar Pal Singh and Sigal Savaldi-Goldstein

in Journal of Experimental Botany

Volume 66, issue 4, pages 1123-1132
Published in print February 2015 | ISSN: 0022-0957
Published online February 2015 | e-ISSN: 1460-2431 | DOI:
Growth control: brassinosteroid activity gets context

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  • Plant Sciences and Forestry


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Brassinosteroid activity controls plant growth and development, often in a seemingly opposing or complex manner. Differential impact of the hormone and its signalling components, acting both as promoters and inhibitors of organ growth, is exemplified by meristem differentiation and cell expansion in above- and below-ground organs. Complex brassinosteroid-based control of stomata count and lateral root development has also been demonstrated. Here, mechanisms underlying these phenotypic outputs are examined. Among these, studies uncovering core brassinosteroid signalling components, which integrate with distinct peptide, hormone, and environmental pathways, are reviewed. Finally, the differential spatiotemporal context of brassinosteroid activity within the organ, as an important determinant of controlled growth, is discussed.

Keywords: Brassinosteroid signalling; growth coordination; meristem size; phytohormone; root growth; shoot growth.

Journal Article.  8475 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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