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Verfasst von:Pacheco-Villalobos, David [VerfasserIn]   i
 Díaz-Moreno, Sara M. [VerfasserIn]   i
 Schuren, Alja van der [VerfasserIn]   i
 Tamaki, Takayuki [VerfasserIn]   i
 Kang, Yeon Hee [VerfasserIn]   i
 Gujas, Bojan [VerfasserIn]   i
 Novak, Ondrej [VerfasserIn]   i
 Jaspert, Nina [VerfasserIn]   i
 Li, Zhenni [VerfasserIn]   i
 Wolf, Sebastian [VerfasserIn]   i
 Oecking, Claudia [VerfasserIn]   i
 Ljung, Karin [VerfasserIn]   i
 Bulone, Vincent [VerfasserIn]   i
 Hardtke, Christian S. [VerfasserIn]   i
Titel:The effects of high steady state auxin levels on root cell elongation in Brachypodium
Verf.angabe:David Pacheco-Villalobos, Sara M. Díaz-Moreno, Alja van der Schuren, Takayuki Tamaki, Yeon Hee Kang, Bojan Gujas, Ondrej Novak, Nina Jaspert, Zhenni Li, Sebastian Wolf, Claudia Oecking, Karin Ljung, Vincent Bulone, and Christian S. Hardtke
E-Jahr:2016
Jahr:May 5, 2016
Umfang:16 S.
Fussnoten:Gesehen am 19.10.2020
Titel Quelle:Enthalten in: The plant cell
Ort Quelle:Rockville, Md. : Soc., 1989
Jahr Quelle:2016
Band/Heft Quelle:28(2016), 5, Seite 1009-1024
ISSN Quelle:1532-298X
Abstract:The long-standing Acid Growth Theory of plant cell elongation posits that auxin promotes cell elongation by stimulating cell wall acidification and thus expansin action. To date, the paucity of pertinent genetic materials has precluded thorough analysis of the importance of this concept in roots. The recent isolation of mutants of the model grass species Brachypodium distachyon with dramatically enhanced root cell elongation due to increased cellular auxin levels has allowed us to address this question. We found that the primary transcriptomic effect associated with elevated steady state auxin concentration in elongating root cells is upregulation of cell wall remodeling factors, notably expansins, while plant hormone signaling pathways maintain remarkable homeostasis. These changes are specifically accompanied by reduced cell wall arabinogalactan complexity but not by increased proton excretion. On the contrary, we observed a tendency for decreased rather than increased proton extrusion from root elongation zones with higher cellular auxin levels. Moreover, similar to Brachypodium, root cell elongation is, in general, robustly buffered against external pH fluctuation in Arabidopsis thaliana. However, forced acidification through artificial proton pump activation inhibits root cell elongation. Thus, the interplay between auxin, proton pump activation, and expansin action may be more flexible in roots than in shoots.
DOI:doi:10.1105/tpc.15.01057
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1105/tpc.15.01057
 Volltext: http://www.plantcell.org/content/28/5/1009
 DOI: https://doi.org/10.1105/tpc.15.01057
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1735933392
Verknüpfungen:→ Zeitschrift

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