Published in
American Association for the Advancement of Science, Science, 5908(322), p. 1650-1655, 2008
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Developmental Patterning by Mechanical Signals in Arabidopsis
,
Hannes Jonsson,
Pawel Krupinski,
Magalie Uyttewaal,
Plamen Bokov,
Francis Corson,
Arezki Boudaoud,
Patrik Sahlin,
Em M. Meyerowitz,
Yves Couder,
Jan Traas
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Abstract
A central question in developmental biology is whether and how mechanical forces serve as cues for cellular behavior and thereby regulate morphogenesis. We found that morphogenesis at the Arabidopsis shoot apex depends on the microtubule cytoskeleton, which in turn is regulated by mechanical stress. A combination of experiments and modeling shows that a feedback loop encompassing tissue morphology, stress patterns, and microtubule-mediated cellular properties is sufficient to account for the coordinated patterns of microtubule arrays observed in epidermal cells, as well as for patterns of apical morphogenesis.