The canalization hypothesis - challenges and alternatives.

Autor: Ravichandran SJ; Department of Biological Sciences, University of Alberta, CW-405 Biological Sciences Building, Edmonton, AB, T6G 2E9, Canada., Linh NM; Department of Biological Sciences, University of Alberta, CW-405 Biological Sciences Building, Edmonton, AB, T6G 2E9, Canada., Scarpella E; Department of Biological Sciences, University of Alberta, CW-405 Biological Sciences Building, Edmonton, AB, T6G 2E9, Canada.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2020 Aug; Vol. 227 (4), pp. 1051-1059. Date of Electronic Publication: 2020 May 14.
DOI: 10.1111/nph.16605
Abstrakt: The 'canalization hypothesis' was suggested 50 years ago by Tsvi Sachs to account for the formation of vascular strands in response to wounding or auxin application. The hypothesis proposes that positive feedback between auxin movement through a cell and the cell's auxin conductivity leads to the gradual selection of narrow 'canals' of polar auxin transport that will differentiate into vascular strands. Though the hypothesis has provided an invaluable conceptual framework to understand the patterned formation of vascular strands, evidence has been accumulating that seems to be incompatible with the hypothesis. We suggest that the challenging evidence is incompatible with current interpretations of the hypothesis but not with the concept at the core of the hypothesis' original formulation.
(© 2020 The Authors. New Phytologist © 2020 New Phytologist Trust.)
Databáze: MEDLINE
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