Phosphate depletion modulates auxin transport in Triticum aestivum leading to altered root branching

Peter J. Talboys; John R. Healey; Paul J. A. Withers; Davey L. Jones

doi:10.1093/jxb/eru284

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Phosphate depletion modulates auxin transport in Triticum aestivum leading to altered root branching

Journal article

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Phosphate depletion modulates auxin transport in Triticum aestivum leading to altered root branching

Peter J. Talboys, John R. Healey, Paul J. A. Withers and Davey L. Jones

Journal of experimental botany, Vol.65(17), pp.5023-5032

2014

DOI: https://doi.org/10.1093/jxb/eru284

PMCID: PMC4144783

PMID: 25086590

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Abstract

Life Sciences & Biomedicine

Plant Sciences

Science & Technology

Understanding the mechanisms by which nutritional signals impact upon root system architecture is a key facet in the drive for greater nutrient application efficiency in agricultural systems. Cereal plants reduce their rate of lateral root emergence under inorganic phosphate (Pi) shortage; this study uses molecular and pharmacological techniques to dissect this Pi response in Triticum aestivum. Plants were grown in coarse sand washed in high- or low-Pi nutrient solution before being assessed for their root branching density and expression of AUX/IAA and PIN genes. Seedlings were also grown on media containing [C-14] indole acetic acid to measure basipetal auxin transport. Seedlings grown in low-Pi environments displayed less capacity to transport auxin basipetally from the seminal root apex, a reduction in root expression of PIN auxin transporter genes, and perturbed expression of a range of AUX/IAA auxin response genes. Given the known importance of basipetally transported auxin in stimulating lateral root initiation, it is proposed here that, in T. aestivum, Pi availability directly influences lateral root production through modulation of PIN expression. Understanding such processes is important in the drive for greater efficiency in crop use of Pi fertilizers in agricultural settings.

Details

Title: Phosphate depletion modulates auxin transport in Triticum aestivum leading to altered root branching
Authors/Creators: Peter J. Talboys - Virginia Tech
John R. Healey - Supreme Council Of Health
Paul J. A. Withers - Supreme Council Of Health
Davey L. Jones - Supreme Council Of Health
Publication Details: Journal of experimental botany, Vol.65(17), pp.5023-5032
Publisher: Oxford University Press
Number of pages: 10
Grant note: BBSRC; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC) DEFRA; Department for Environment, Food & Rural Affairs (DEFRA) LK09136 / Scottish Government
Identifiers: 991005560426507891
Copyright: © 2014 The Author.
Murdoch Affiliation: Centre for Sustainable Farming Systems
Language: English
Resource Type: Journal article

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Citation topics: 3 Agriculture, Environment & Ecology; 3.4 Crop Science; 3.4.159 Arabidopsis
Web Of Science research areas: Plant Sciences
ESI research areas: Plant & Animal Science