Phosphate scouting by root tips.

Steffen Abel

Journal: Current opinion in plant biology 2018;39():168-177

PMID: 28527590

Full Text on Elsevier Science View on PubMed

Abstract

Chemistry assigns phosphate (Pi) dominant roles in metabolism; however, it also renders the macronutrient a genuinely limiting factor of plant productivity. Pi bioavailability is restricted by low Pi mobility in soil and antagonized by metallic toxicities, which force roots to actively seek and selectively acquire the vital element. During the past few years, a first conceptual outline has emerged of the sensory mechanisms at root tips, which monitor external Pi and transmit the edaphic cue to inform root development. This review highlights new aspects of the Pi acquisition strategy of Arabidopsis roots, as well as a framework of local Pi sensing in the context of antagonistic interactions between Pi and its major associated metallic cations, Fe and Al.

Address: Department of Molecular Signal Processing, Leibniz Institute of Plant Biochemistry, 06120 Halle, Germany; Department of Plant Sciences, University of California, Davis, CA 95616, USA. Electronic address: [email protected].

DOI: 10.1016/j.pbi.2017.04.016