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.
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
January 2015
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), .
(doi:10.1111/pce.12376).
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
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
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:
P.J.A. Withers
Author:
D.L. Jones
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
