Polarized transport across root epithelia.
Curr Opin Plant Biol
; 52: 23-29, 2019 12.
Article
em En
| MEDLINE
| ID: mdl-31323542
ABSTRACT
Plant roots explore the soil to acquire water and nutrients which are often available at concentrations that drastically differ from the plant's actual need for growth and development. This stark difference between availability and requirement can be dealt with owing to the root's architecture as an inverted gut. In roots, the two epithelial characteristics (selective acquisition and diffusion barrier) are split between two cell layers the epidermis at the root periphery and the endodermis as the innermost cortical cell layer around the vasculature. Polarized transport of nutrients across the root epithelium can be achieved through different pathways apoplastic, symplastic, or coupled transcellular. This review highlights different features of the root that allow this polarized transport. Special emphasis is placed on the coupled transcellular pathway, facilitated by polarized nutrient carriers along root cell layers but barred by suberin lamellae in endodermal cells.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Água
/
Raízes de Plantas
Idioma:
En
Revista:
Curr Opin Plant Biol
Assunto da revista:
BOTANICA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Suíça