The University of Southampton
University of Southampton Institutional Repository

How changing root system architecture can help tackle a reduction in soil phosphate (P) levels for better plant P acquisition

How changing root system architecture can help tackle a reduction in soil phosphate (P) levels for better plant P acquisition
How changing root system architecture can help tackle a reduction in soil phosphate (P) levels for better plant P acquisition
The readily available global rock phosphate (P) reserves may run out within the next 50-130 years, causing soils to have a reduced P concentration which will affect plant P uptake. Using a combination of mathematical modelling and experimental data we investigated potential plant-based options for optimising crop P uptake in reduced soil P environments.

By varying the P concentration within a well-mixed agricultural soil, for high and low P (35.5 to 12.5 mg l-1 respectively, using Olsen’s P index), we investigated branching distributions within a wheat root system that maximise P uptake.

Changing the root branching distribution from linear (evenly spaced branches) to strongly exponential (a greater number of branches at the top of the soil), improves P uptake by 142% for low P soils when root mass is kept constant between simulations. This causes the roots to emerge earlier and mimics topsoil foraging. Manipulating root branching patterns, to maximise P uptake, is not enough on its own to overcome the drop in soil P from high to low P. Further mechanisms have to be considered to fully understand the impact of P reduction on plant development.
0140-7791
118-128
Heppell, J.
39c5f33d-249f-4e52-9f28-0e7db5116f16
Talboys, P.
ef5654c5-df63-4cde-a552-a996b652908d
Payvandi, S.
4137c4e4-3cb6-4b9a-9635-f17f03e19d18
Zygalakis, K.C.
a330d719-2ccb-49bd-8cd8-d06b1e6daca6
Fliege, Jörg
54978787-a271-4f70-8494-3c701c893d98
Withers, P.J.A.
f73515d5-d8d4-4361-a140-aae29b664f59
Jones, D.L.
4c7d0ebb-b7e3-4afc-adbc-ece2ba1fc54f
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
Heppell, J.
39c5f33d-249f-4e52-9f28-0e7db5116f16
Talboys, P.
ef5654c5-df63-4cde-a552-a996b652908d
Payvandi, S.
4137c4e4-3cb6-4b9a-9635-f17f03e19d18
Zygalakis, K.C.
a330d719-2ccb-49bd-8cd8-d06b1e6daca6
Fliege, Jörg
54978787-a271-4f70-8494-3c701c893d98
Withers, P.J.A.
f73515d5-d8d4-4361-a140-aae29b664f59
Jones, D.L.
4c7d0ebb-b7e3-4afc-adbc-ece2ba1fc54f
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe

Heppell, J., Talboys, P., Payvandi, S., Zygalakis, K.C., Fliege, Jörg, Withers, P.J.A., Jones, D.L. and Roose, Tiina (2015) How changing root system architecture can help tackle a reduction in soil phosphate (P) levels for better plant P acquisition. Plant, Cell & Environment, 38 (1), 118-128. (doi:10.1111/pce.12376).

Record type: Article

Abstract

The readily available global rock phosphate (P) reserves may run out within the next 50-130 years, causing soils to have a reduced P concentration which will affect plant P uptake. Using a combination of mathematical modelling and experimental data we investigated potential plant-based options for optimising crop P uptake in reduced soil P environments.

By varying the P concentration within a well-mixed agricultural soil, for high and low P (35.5 to 12.5 mg l-1 respectively, using Olsen’s P index), we investigated branching distributions within a wheat root system that maximise P uptake.

Changing the root branching distribution from linear (evenly spaced branches) to strongly exponential (a greater number of branches at the top of the soil), improves P uptake by 142% for low P soils when root mass is kept constant between simulations. This causes the roots to emerge earlier and mimics topsoil foraging. Manipulating root branching patterns, to maximise P uptake, is not enough on its own to overcome the drop in soil P from high to low P. Further mechanisms have to be considered to fully understand the impact of P reduction on plant development.

Text
Heppell PCE accepted main text.pdf - Accepted Manuscript
Download (631kB)
Text
maintextFINALwith figures.pdf - Other
Restricted to Repository staff only
Request a copy

More information

Accepted/In Press date: 28 May 2014
e-pub ahead of print date: 24 June 2014
Published date: January 2015
Organisations: Bioengineering Group

Identifiers

Local EPrints ID: 365250
URI: http://eprints.soton.ac.uk/id/eprint/365250
ISSN: 0140-7791
PURE UUID: c28c8195-c9f5-4684-af06-fb55c46a2a63
ORCID for Jörg Fliege: ORCID iD orcid.org/0000-0002-4459-5419
ORCID for Tiina Roose: ORCID iD orcid.org/0000-0001-8710-1063

Catalogue record

Date deposited: 28 May 2014 11:14
Last modified: 15 Mar 2024 03:31

Export record

Altmetrics

Contributors

Author: J. Heppell
Author: P. Talboys
Author: S. Payvandi
Author: K.C. Zygalakis
Author: Jörg Fliege ORCID iD
Author: P.J.A. Withers
Author: D.L. Jones
Author: Tiina Roose ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×