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How Does Auxin Enhance Cell Elongation? Roles of Auxin‐Binding Proteins and Potassium Channels in Growth Control
Author(s) -
Christian M.,
Steffens B.,
Schenck D.,
Burmester S.,
Böttger M.,
Lüthen H.
Publication year - 2006
Publication title -
plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 1435-8603
DOI - 10.1055/s-2006-923965
Subject(s) - auxin , biology , microbiology and biotechnology , elongation , plant hormone , receptor , cell division , biophysics , cell , biochemistry , gene , materials science , ultimate tensile strength , metallurgy
Elongation growth and a several other phenomena in plant development are controlled by the plant hormone auxin. A number of recent discoveries shed light on one of the classical problems of plant physiology: the perception of the auxin signal. Two types of auxin receptors are currently known: the AFB/TIR family of F box proteins and ABP1. ABP1 appears to control membrane transport processes (H + secretion, osmotic adjustment) while the TIR/AFBs have a role in auxin‐induced gene expression. Models are proposed to explain how membrane transport (e.g., K + and H + fluxes) can act as a cross‐linker for the control of more complex auxin responses such as the classical stimulation of cell elongation.