Abstract
Polar transport of the signaling molecule auxin is critical for plant development and depends on both the polar distribution of auxin efflux carriers, which pump auxin out of the cell and the alignment of these polarized cells. Two papers in this issue of Cell (Michniewicz et al., 2007; Jaillais et al., 2007) address how polar transport of these carriers occurs and describe the endosomal pathways involved.
MeSH terms
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Arabidopsis / embryology
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Arabidopsis / enzymology
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Arabidopsis / genetics
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Arabidopsis / growth & development
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Arabidopsis / metabolism*
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Arabidopsis Proteins / genetics
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Arabidopsis Proteins / metabolism*
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Carrier Proteins / metabolism
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Cell Differentiation
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Cell Polarity*
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Cell Proliferation
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Endosomes / metabolism
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Genotype
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Guanine Nucleotide Exchange Factors / metabolism
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Indoleacetic Acids / metabolism*
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Membrane Transport Proteins / metabolism
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Meristem / enzymology
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Meristem / metabolism
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Mutation
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Phenotype
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Phosphoprotein Phosphatases / metabolism
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Phosphorylation
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Plants, Genetically Modified / embryology
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Plants, Genetically Modified / enzymology
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Plants, Genetically Modified / genetics
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Plants, Genetically Modified / growth & development
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Plants, Genetically Modified / metabolism*
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Protein Serine-Threonine Kinases / metabolism
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Protein Subunits / metabolism
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Protein Transport
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Seedlings / enzymology
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Seedlings / metabolism
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Signal Transduction
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Sorting Nexins
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Vesicular Transport Proteins / metabolism
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Xylem / metabolism
Substances
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Arabidopsis Proteins
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Carrier Proteins
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GNOM protein, Arabidopsis
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Guanine Nucleotide Exchange Factors
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Indoleacetic Acids
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Mag1 protein, Arabidopsis
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Membrane Transport Proteins
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PIN1 protein, Arabidopsis
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PIN2 protein, Arabidopsis
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PIN4 protein, Arabidopsis
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Protein Subunits
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Sorting Nexins
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Vesicular Transport Proteins
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PINOID protein, Arabidopsis
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Protein Serine-Threonine Kinases
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Phosphoprotein Phosphatases