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Article Dans Une Revue Plant Science Année : 2021

Developmental roles of Auxin Binding Protein 1 in Arabidopsis thaliana

Zuzana Gelová
  • Fonction : Auteur
Michelle Gallei
  • Fonction : Auteur
Geraldine Brunoud
Xixi Zhang
  • Fonction : Auteur
Matouš Glanc
  • Fonction : Auteur
Lanxin Li
  • Fonction : Auteur
Jaroslav Michalko
  • Fonction : Auteur
Zlata Pavlovičová
  • Fonction : Auteur
Inge Verstraeten
  • Fonction : Auteur
Huibin Han
  • Fonction : Auteur
Jakub Hajný
  • Fonction : Auteur
Robert Hauschild
  • Fonction : Auteur
Milada Čovanová
  • Fonction : Auteur
Marta Zwiewka
  • Fonction : Auteur
Lukas Hoermayer
  • Fonction : Auteur
Matyáš Fendrych
  • Fonction : Auteur
Tongda Xu
  • Fonction : Auteur
Teva Vernoux
Jiří Friml
  • Fonction : Auteur
  • PersonId : 1019514

Résumé

Auxin is a major plant growth regulator, but current models on auxin perception and signaling cannot explain the whole plethora of auxin effects, in particular those associated with rapid responses. A possible candidate for a component of additional auxin perception mechanisms is the AUXIN BINDING PROTEIN 1 (ABP1), whose function in planta remains unclear. Here we combined expression analysis with gain-and loss-of-function approaches to analyze the role of ABP1 in plant development. ABP1 shows a broad expression largely overlapping with, but not regulated by, transcriptional auxin response activity. Furthermore, ABP1 activity is not essential for the transcriptional auxin signaling. Genetic in planta analysis revealed that abp1 loss-of-function mutants show largely normal development with minor defects in bolting. On the other hand, ABP1 gain-of-function alleles show a broad range of growth and developmental defects, including root and hypocotyl growth and bending, lateral root and leaf development, bolting, as well as response to heat stress. At the cellular level, ABP1 gain-of-function leads to impaired auxin effect on PIN polar distribution and affects BFA-sensitive PIN intracellular aggregation. The gain-of-function analysis suggests a broad, but still mechanistically unclear involvement of ABP1 in plant development, possibly masked in abp1 loss-of-function mutants by a functional redundancy.
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Dates et versions

hal-03030481 , version 1 (30-11-2020)

Identifiants

Citer

Zuzana Gelová, Michelle Gallei, Markéta Pernisová, Geraldine Brunoud, Xixi Zhang, et al.. Developmental roles of Auxin Binding Protein 1 in Arabidopsis thaliana. Plant Science, 2021, 303, pp.110750. ⟨10.1016/j.plantsci.2020.110750⟩. ⟨hal-03030481⟩
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