Regulation of Auxin Response by the Protein Kinase PINOID

Arabidopsis plants carrying mutations in the PINOID ( PID) gene have a pleiotropic shoot phenotype that mimics that of plants grown on auxin transport inhibitors or of plants mutant for the auxin efflux carrier PINFORMED ( PIN), with defects in the formation of cotyledons, flowers, and floral organs...

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Bibliographic Details
Published in:Cell 2000-02, Vol.100 (4), p.469-478
Main Authors: Christensen, Sioux K, Dagenais, Nicole, Chory, Joanne, Weigel, Detlef
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Arabidopsis
Arabidopsis - enzymology
Arabidopsis - genetics
Arabidopsis Proteins
auxins
Base Sequence
Biomarkers
DNA, Plant
Gene Expression
Indoleacetic Acids - metabolism
Meristem
Molecular Sequence Data
PINFORMED gene
PINOID protein
Protein-Serine-Threonine Kinases - genetics
Protein-Serine-Threonine Kinases - metabolism
protein-serine/threonine kinase
Space life sciences
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Summary:Arabidopsis plants carrying mutations in the PINOID ( PID) gene have a pleiotropic shoot phenotype that mimics that of plants grown on auxin transport inhibitors or of plants mutant for the auxin efflux carrier PINFORMED ( PIN), with defects in the formation of cotyledons, flowers, and floral organs. We have cloned PID and find that it is transiently expressed in the embryo and in initiating floral anlagen, demonstrating a specific role for PID in promoting primordium development. Constitutive expression of PID causes a phenotype in both shoots and roots that is similar to that of auxin-insensitive plants, implying that PID, which encodes a serine-threonine protein kinase, negatively regulates auxin signaling.
ISSN:0092-8674
1097-4172
DOI:10.1016/S0092-8674(00)80682-0