Journal Article

Auxin Regulation of Embryonic Root Formation

Saiko Yoshida, Shunsuke Saiga and Dolf Weijers

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 54, issue 3, pages 325-332
Published in print March 2013 | ISSN: 0032-0781
Published online December 2012 | e-ISSN: 1471-9053 | DOI:
Auxin Regulation of Embryonic Root Formation

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry


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The plant hormone auxin was initially identified as the bioactive substance that induces roots in plant tissue culture. In the past decades, mechanisms for auxin action, including its transport and response, have been described in detail. However, a molecular and cellular description of its role in root initiation is far from complete. In this review, we discuss recent advances in our understanding of auxin-dependent embryonic root formation. During this process, a root meristem is initiated in a precise and predictable position, and at a stage when the organism consists of relatively few cells. Recent studies have revealed mechanisms for local control of auxin transport, for cellular differences in auxin response components and cell type-specific chromatin regulation. The recent identification of biologically relevant target genes for auxin regulation during embryonic root initiation now also allows dissection of auxin-activated cellular processes. Finally, we discuss the potential for hormonal cross-regulation in embryonic root formation.

Keywords: Auxin

Journal Article.  5518 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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