Different Auxin Response Machineries Control Distinct Cell Fates in the Early Plant Embryo

E.H. Rademacher, A.S. Lokerse, A. Schlereth, C.I. Llavata Peris, M. Bayer, M. Kientz, A. Freire Rios, J.W. Borst, W. Lukowitz, G. Juergens, D. Weijers

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101 Citations (Scopus)

Abstract

The cell types of the plant root are first specified early during embryogenesis and are maintained throughout plant life. Auxin plays an essential role in embryonic root initiation, in part through the action of the ARF5/MP transcription factor and its auxin-labile inhibitor IAA12/BDL. MP and BDL function in embryonic cells but promote auxin transport to adjacent extraembryonic suspensor cells, including the quiescent center precursor (hypophysis). Here we show that a cell-autonomous auxin response within this cell is required for root meristem initiation. ARF9 and redundant ARFs, and their inhibitor IAA10, act in suspensor cells to mediate hypophysis specification and, surprisingly, also to prevent transformation to embryo identity. ARF misexpression, and analysis of the short suspensor mutant, demonstrates that lineage-specific expression of these ARFs is required for normal embryo development. These results imply the existence of a prepattern for a cell-type-specific auxin response that underlies the auxin-dependent specification of embryonic cell types
LanguageEnglish
Pages211-222
JournalDevelopmental Cell
Volume22
Issue number1
DOIs
Publication statusPublished - 2012

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Indoleacetic Acids
Seeds
Pituitary Gland
Embryonic Development
Specifications
Plant Roots
Meristem
Transcription Factors
Embryonic Structures

Keywords

  • arabidopsis embryo
  • transcription factor
  • seed development
  • expression map
  • root-meristem
  • aux/iaa genes
  • proteins
  • monopteros
  • family
  • transformation

Cite this

Rademacher, E.H. ; Lokerse, A.S. ; Schlereth, A. ; Llavata Peris, C.I. ; Bayer, M. ; Kientz, M. ; Freire Rios, A. ; Borst, J.W. ; Lukowitz, W. ; Juergens, G. ; Weijers, D. / Different Auxin Response Machineries Control Distinct Cell Fates in the Early Plant Embryo. In: Developmental Cell. 2012 ; Vol. 22, No. 1. pp. 211-222.
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Different Auxin Response Machineries Control Distinct Cell Fates in the Early Plant Embryo. / Rademacher, E.H.; Lokerse, A.S.; Schlereth, A.; Llavata Peris, C.I.; Bayer, M.; Kientz, M.; Freire Rios, A.; Borst, J.W.; Lukowitz, W.; Juergens, G.; Weijers, D.

In: Developmental Cell, Vol. 22, No. 1, 2012, p. 211-222.

Research output: Contribution to journalArticleAcademicpeer-review

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