Pascal Tillard

TL;DR: It is proposed that NRT1.1 represses lateral root growth at low nitrate availability by promoting basipetal auxin transport out of these roots, which defines a mechanism connecting nutrient and hormone signaling during organ development.

TL;DR: It is concluded that NRT1.1, which is localized at the forefront of soil exploration by the roots, is a key component of the NO3−-sensing system that enables the plant to detect and exploit NO3-rich soil patches.

TL;DR: Functional analysis of cRNA-injected Xenopus laevis oocytes showed that NRT1.5 is a low-affinity, pH-dependent bidirectional nitrate transporter, and a regulatory loop between nitrate and potassium at the xylem transport step, suggesting that, in addition to that involving NRT 1.5, another mechanism is responsible for xylesm loading of nitrate.

TL;DR: Observations show that expression of Nrt2;1 is under feedback repression by N-metabolites resulting from NO3- reduction, and changes in the Nrt1 mRNA level are not always associated with similarChanges in the activities of high- or low-affinity No3- transport systems.

TL;DR: NRT2.1 has a key dual function in coordinating root development with external NO3− availability, both indirectly through its role as a majorNO3− uptake system that determines the nitrogen uptake-dependent RSA responses, and directly through a specific action on LR initiation under nitrogen-limited conditions.