Cellular responses to auxin: division versus expansion.
The phytohormone auxin is a major regulator of plant growth and development. Many aspects of these processes depend on the multiple controls exerted by auxin on cell division and cell expansion. The detailed mechanisms by which auxin controls these essential cellular responses are still poorly understood, despite recent progress in the identification of auxin receptors and components of auxin signaling pathways. The purpose of this review is to provide an overview of the present knowledge of the molecular mechanisms involved in the auxin control of cell division and cell expansion. In both cases, the involvement of at least two signaling pathways and of multiple targets of auxin action reflects the complexity of the subtle regulation of auxin-mediated cellular responses. In addition, it offers the necessary flexibility for generating differential responses within a given cell depending on its developmental context.
Perrot-Rechenmann
Catherine
C
Institut des Sciences du Végétal, UPR2355 CNRS, 1 Avenue de la Terrasse, 91198 Gif sur Yvette, Cedex, France. catherine.rechenmann@isv.cnrs-gif.fr
D002453:Cell Cycle / Q000502:physiology; D002455:Cell Division / Q000502:physiology*; D018506:Gene Expression Regulation, Plant / Q000502:physiology; D007210:Indoleacetic Acids / Q000378:metabolism*; D015398:Signal Transduction
D007210:Indoleacetic Acids
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