PLANT DEVELOPMENT Integration of growth and patterning during vascular tissue formation in Arabidopsis

0432571 - ÚEB 2015 RIV US eng J - Journal Article
De Rybel, B. - Adibi, M. - Breda, A.S. - Wendrich, J.R. - Smit, M.E. - Novák, Ondřej - Yamaguchi, N. - Weijers, D. … Total 18 authors
PLANT DEVELOPMENT Integration of growth and patterning during vascular tissue formation in Arabidopsis.
Science. Roč. 345, č. 6197 (2014). ISSN 0036-8075. E-ISSN 1095-9203
R&D Projects: GA MŠMT LK21306; GA MŠMT(CZ) LO1204; GA ČR GA14-34792S
Institutional support: RVO:61389030
Keywords : DEPENDENT AUXIN GRADIENTS * SOLID-PHASE EXTRACTION * SHOOT APICAL MERISTEM
Subject RIV: EF - Botanics
Impact factor: 33.611, year: 2014

Coordination of cell division and pattern formation is central to tissue and organ development, particularly in plants where walls prevent cell migration. Auxin and cytokinin are both critical for division and patterning, but it is unknown how these hormones converge upon tissue development. We identify a genetic network that reinforces an early embryonic bias in auxin distribution to create a local, nonresponding cytokinin source within the root vascular tissue. Experimental and theoretical evidence shows that these cells act as a tissue organizer by positioning the domain of oriented cell divisions. We further demonstrate that the auxin-cytokinin interaction acts as a spatial incoherent feed-forward loop, which is essential to generate distinct hormonal response zones, thus establishing a stable pattern within a growing vascular tissue.
Permanent Link: http://hdl.handle.net/11104/0237091