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Vernoux, Teva; Besnard, Fabrice; Traas, Jan (2010)
Publisher: Cold Spring Harbor Laboratory Press
Languages: English
Types: Article
Subjects: auxine, plante, Perspectives, arabidopsis;arabidopsis poteins;meristem;plant growth regulators;indoleacetic acids, plant, méristème apical, acide indolacétique, régulateur de croissance, arabidopsis

Classified by OpenAIRE into

mesheuropmc: food and beverages, fungi, heterocyclic compounds
Plants continuously generate new tissues and organs through the activity of populations of undifferentiated stem cells, called meristems. Here, we discuss the so-called shoot apical meristem (SAM), which generates all the aerial parts of the plant. It has been known for many years that auxin plays a central role in the functioning of this meristem. Auxin is not homogeneously distributed at the SAM and it is thought that this distribution is interpreted in terms of differential gene expression and patterned growth. In this context, auxin transporters of the PIN and AUX families, creating auxin maxima and minima, are crucial regulators. However, auxin transport is not the only factor involved. Auxin biosynthesis genes also show specific, patterned activities, and local auxin synthesis appears to be essential for meristem function as well. In addition, auxin perception and signal transduction defining the competence of cells to react to auxin, add further complexity to the issue. To unravel this intricate signaling network at the SAM, systems biology approaches, involving not only molecular genetics but also live imaging and computational modeling, have become increasingly important.
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