TY - JOUR
T1 - Adaptation of Root Function by Nutrient-Induced Plasticity of Endodermal Differentiation
AU - Barberon, Marie
AU - Vermeer, Joop Engelbertus Martinus
AU - De Bellis, Damien
AU - Wang, Peng
AU - Naseer, Sadaf
AU - Andersen, Tonni Grube
AU - Humbel, Bruno Martin
AU - Nawrath, Christiane
AU - Takano, Junpei
AU - Salt, David Edward
AU - Geldner, Niko
N1 - Copyright © 2016 Elsevier Inc. All rights reserved.
PY - 2016/1/28
Y1 - 2016/1/28
N2 - Plant roots forage the soil for minerals whose concentrations can be orders of magnitude away from those required for plant cell function. Selective uptake in multicellular organisms critically requires epithelia with extracellular diffusion barriers. In plants, such a barrier is provided by the endodermis and its Casparian strips-cell wall impregnations analogous to animal tight and adherens junctions. Interestingly, the endodermis undergoes secondary differentiation, becoming coated with hydrophobic suberin, presumably switching from an actively absorbing to a protective epithelium. Here, we show that suberization responds to a wide range of nutrient stresses, mediated by the stress hormones abscisic acid and ethylene. We reveal a striking ability of the root to not only regulate synthesis of suberin, but also selectively degrade it in response to ethylene. Finally, we demonstrate that changes in suberization constitute physiologically relevant, adaptive responses, pointing to a pivotal role of the endodermal membrane in nutrient homeostasis.
AB - Plant roots forage the soil for minerals whose concentrations can be orders of magnitude away from those required for plant cell function. Selective uptake in multicellular organisms critically requires epithelia with extracellular diffusion barriers. In plants, such a barrier is provided by the endodermis and its Casparian strips-cell wall impregnations analogous to animal tight and adherens junctions. Interestingly, the endodermis undergoes secondary differentiation, becoming coated with hydrophobic suberin, presumably switching from an actively absorbing to a protective epithelium. Here, we show that suberization responds to a wide range of nutrient stresses, mediated by the stress hormones abscisic acid and ethylene. We reveal a striking ability of the root to not only regulate synthesis of suberin, but also selectively degrade it in response to ethylene. Finally, we demonstrate that changes in suberization constitute physiologically relevant, adaptive responses, pointing to a pivotal role of the endodermal membrane in nutrient homeostasis.
U2 - 10.1016/j.cell.2015.12.021
DO - 10.1016/j.cell.2015.12.021
M3 - Article
C2 - 26777403
SN - 0092-8674
VL - 164
SP - 447
EP - 459
JO - Cell
JF - Cell
IS - 3
ER -