RT Journal Article
SR Electronic
T1 Malate-dependent Fe accumulation is a critical checkpoint in the root developmental response to low phosphate
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 095497
DO 10.1101/095497
A1 Javier Mora-Macías
A1 Jonathan Odilón Ojeda-Rivera
A1 Dolores Gutiérrez-Alanís
A1 Lenin Yong-Villalobos
A1 Araceli Oropeza-Aburto
A1 Javier Raya González
A1 Gabriel Jiménez-Domínguez
A1 Gabriela Chávez-Calvillo
A1 Rubén Rellán-Álvarez
A1 Luis Herrera-Estrella
YR 2016
UL http://biorxiv.org/content/early/2016/12/19/095497.abstract
AB Low phosphate (Pi) availability constrains plant development and crop production in both natural and agricultural ecosystems. When Pi is scarce, modifications of root system architecture (RSA) enhance soil exploration ability and can lead to an increase in Pi uptake. In Arabidopsis, an iron-dependent determinate developmental program that induces premature differentiation in the root apical meristem (RAM) begins when the root tip contacts low Pi media, resulting in a short-root phenotype. However, the mechanisms that enable the regulation of root growth in response to Pi-limiting conditions remain largely unknown. Cellular, genomic and transcriptomic analysis of low-Pi insensitive mutants revealed that the malate-exudation related genes SENSITIVE TO PROTON RHIZOTOXICITY (STOP1) and ALUMINUM ACTIVATED MALATE TRANSPORTER 1 (ALMT1) represent a critical checkpoint in the root developmental response to Pi starvation in Arabidopsis thaliana.