Of Cells, Strands, and Networks: Auxin and the Patterned Formation of the Vascular System.

Autor:	Lavania D; Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada., Linh NM; Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada., Scarpella E; Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada.
Jazyk:	angličtina
Zdroj:	Cold Spring Harbor perspectives in biology [Cold Spring Harb Perspect Biol] 2021 Jun 01; Vol. 13 (6). Date of Electronic Publication: 2021 Jun 01.
DOI:	10.1101/cshperspect.a039958
Abstrakt:	Throughout plant development, vascular cells continually form from within a population of seemingly equivalent cells. Vascular cells connect end to end to form continuous strands, and vascular strands connect at both or either end to form networks of exquisite complexity and mesmerizing beauty. Here we argue that experimental evidence gained over the past few decades implicates the plant hormone auxin-its production, transport, perception, and response-in all the steps that lead to the patterned formation of the plant vascular system, from the formation of vascular cells to their connection into vascular networks. We emphasize the organizing principles of the cell- and tissue-patterning process, rather than its molecular subtleties. In the picture that emerges, cells compete for an auxin-dependent, cell-polarizing signal; positive feedback between cell polarization and cell-to-cell movement of the polarizing signal leads to gradual selection of cell files; and selected cell files differentiate into vascular strands that drain the polarizing signal from the neighboring cells. Although the logic of the patterning process has become increasingly clear, the molecular details remain blurry; the future challenge will be to bring them into razor-sharp focus. (Copyright © 2021 Cold Spring Harbor Laboratory Press; all rights reserved.)
Databáze:	MEDLINE
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