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Trends Plant Sci. 2013 Aug;18(8):450-8. doi: 10.1016/j.tplants.2013.04.006. Epub 2013 May 20.

Lateral root development in Arabidopsis: fifty shades of auxin.

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Institut de Recherche pour le Développement (IRD), UMR DIADE (IRD/UM2), 911 Avenue Agropolis, 34394 Montpellier cedex 5, France.


The developmental plasticity of the root system represents a key adaptive trait enabling plants to cope with abiotic stresses such as drought and is therefore important in the current context of global changes. Root branching through lateral root formation is an important component of the adaptability of the root system to its environment. Our understanding of the mechanisms controlling lateral root development has progressed tremendously in recent years through research in the model plant Arabidopsis thaliana (Arabidopsis). These studies have revealed that the phytohormone auxin acts as a common integrator to many endogenous and environmental signals regulating lateral root formation. Here, we review what has been learnt about the myriad roles of auxin during lateral root formation in Arabidopsis.

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