Physiological roles of Casparian strips and suberin in the transport of water and solutes.

ABSTRACT: The formation of Casparian strips (CS) and the deposition of suberin at the endodermis of plant roots are thought to limit the apoplastic transport of water and ions. We investigated the specific role of each of these apoplastic barriers in the control of hydro-mineral transport by roots and the consequences on shoot growth. A collection of Arabidopsis thaliana mutants defective in suberin deposition and/or CS development was characterized under standard conditions using a hydroponic system and the Phenopsis platform. Mutants altered in suberin deposition had enhanced root hydraulic conductivity, indicating a restrictive role for this compound in water transport. In contrast, defective CS directly increased solute leakage and indirectly reduced root hydraulic conductivity. Defective CS als

SUBMITTER: Calvo-Polanco M 

PROVIDER: S-EPMC9298204 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature