ER-localized auxin transporter PIN8 regulates auxin homeostasis and male gametophyte development in Arabidopsis
No hay miniatura disponible
Archivos
Fecha
2012
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Nature Research
Nombre de Curso
Licencia CC
CC BY-NC-ND 3.0
ATTRIBUTION-NONCOMMERCIAL-NODERIVS 3.0 UNPORTED
Deed
Licencia CC
https://creativecommons.org/licenses/by-nc-nd/3.0/
Resumen
Auxin is a key coordinative signal required for many aspects of plant development and its levels are controlled by auxin metabolism and intercellular auxin transport. Here we find that a member of PIN auxin transporter family, PIN8 is expressed in male gametophyte of Arabidopsis thaliana and has a crucial role in pollen development and functionality. Ectopic expression in sporophytic tissues establishes a role of PIN8 in regulating auxin homoeostasis and metabolism. PIN8 co-localizes with PIN5 to the endoplasmic reticulum (ER) where it acts as an auxin transporter. Genetic analyses reveal an antagonistic action of PIN5 and PIN8 in the regulation of intracellular auxin homoeostasis and gametophyte as well as sporophyte development. Our results reveal a role of the auxin transport in male gametophyte development in which the distinct actions of ER-localized PIN transporters regulate cellular auxin homoeostasis and maintain the auxin levels optimal for pollen development and pollen tube growth. © 2012 Macmillan Publishers Limited. All rights reserved.
Notas
INDEXACIÓN: SCOPUS.
Palabras clave
Arabidopsis, Arabidopsis Proteins, Endoplasmic Reticulum, Gene Expression Regulation, Plant, Indoleacetic Acids, Pollen
Citación
Nature Communications, Volume 3, 2012, Article number 941
DOI
10.1038/ncomms1941