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

Autor: Marika Kientz, Alexandra Schlereth, Martin Bayer, Jan Willem Borst, Cristina I. Llavata-Peris, Dolf Weijers, Eike H. Rademacher, Annemarie S. Lokerse, Wolfgang Lukowitz, Alejandra Freire Rios, Gerd Jürgens
Jazyk: angličtina
Rok vydání: 2012
Předmět:
0106 biological sciences
family
Arabidopsis
01 natural sciences
Plant Roots
Biochemistry
Plant Growth Regulators
Gene Expression Regulation
Plant
Fluorescence Resonance Energy Transfer
In Situ Hybridization
transcription factor
chemistry.chemical_classification
0303 health sciences
EPS-1
food and beverages
root-meristem
Embryo
Plants
Genetically Modified
Cell biology
Meristem initiation
Seeds
Suspensor
seed development
Signal Transduction
expression map
Cell type
Biochemie
Biology
Genes
Plant
General Biochemistry
Genetics and Molecular Biology
03 medical and health sciences
Auxin
Botany
Cell Lineage
Molecular Biology
Transcription factor
030304 developmental biology
arabidopsis embryo
Indoleacetic Acids
Arabidopsis Proteins
transformation
Embryogenesis
fungi
aux/iaa genes
Cell Biology
Embryonic stem cell
proteins
chemistry
monopteros
ADP-Ribosylation Factor 1
010606 plant biology & botany
Developmental Biology
Zdroj: Developmental Cell, 22(1), 211-222
Developmental Cell 22 (2012) 1
ISSN: 1534-5807
Popis: SummaryThe 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.
Databáze: OpenAIRE
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