Linking root structure to functionality: the impact of root system architecture on citrate enhanced phosphate uptake
Linking root structure to functionality: the impact of root system architecture on citrate enhanced phosphate uptake
Root citrate exudation is thought to be important for phosphate solubilization. Previous research has concluded that cluster-like roots benefit most from this exudation in terms of increased phosphate uptake, suggesting that root structure plays an important role in citrate-enhanced uptake (additional phosphate uptake due to citrate exudation). Time-resolved computed tomography images of wheat root systems were used as the geometry for 3D citrate-phosphate solubilization models. Citrate-enhanced uptake was correlated with morphological measures of the root systems to determine which had the most benefit. A large variation of citrate-enhanced uptake over 11 root structures was observed. Root surface area dominated absolute phosphate uptake, but did not explain citrate-enhanced uptake. Number of exuding root tips correlated well with citrate-enhanced uptake. Root tips in close proximity could collectively exude high amounts of citrate, resulting in a delayed spike in citrate-enhanced uptake. Root system architecture plays an important role in citrate-enhanced uptake. Singular morphological measurements of the root systems cannot entirely explain variations in citrate-enhanced uptake. Root systems with many tips would benefit greatly from citrate exudation. Quantifying citrate-enhanced uptake experimentally is difficult as variations in root surface area would overwhelm citrate benefits.
Root system architecture, a-biotic stress, citrate, exudation, modelling, phosphorus
376-391
Mckay Fletcher, Daniel
db06e7e0-69af-4fa2-89b3-26f6599e43d4
Ruiz, Siul Aljadi
d79b3b82-7c0d-47cc-9616-11d29e6a41bd
Gerheim Souza Dias, Tiago
cbb905da-3e22-4933-8b7b-663c52345e3a
Petroselli, Chiara
19266726-2dc0-4790-af77-7ccdc45865eb
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
1 July 2020
Mckay Fletcher, Daniel
db06e7e0-69af-4fa2-89b3-26f6599e43d4
Ruiz, Siul Aljadi
d79b3b82-7c0d-47cc-9616-11d29e6a41bd
Gerheim Souza Dias, Tiago
cbb905da-3e22-4933-8b7b-663c52345e3a
Petroselli, Chiara
19266726-2dc0-4790-af77-7ccdc45865eb
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
Mckay Fletcher, Daniel, Ruiz, Siul Aljadi, Gerheim Souza Dias, Tiago, Petroselli, Chiara and Roose, Tiina
(2020)
Linking root structure to functionality: the impact of root system architecture on citrate enhanced phosphate uptake.
New Phytologist, 227 (2), .
(doi:10.1111/nph.16554).
Abstract
Root citrate exudation is thought to be important for phosphate solubilization. Previous research has concluded that cluster-like roots benefit most from this exudation in terms of increased phosphate uptake, suggesting that root structure plays an important role in citrate-enhanced uptake (additional phosphate uptake due to citrate exudation). Time-resolved computed tomography images of wheat root systems were used as the geometry for 3D citrate-phosphate solubilization models. Citrate-enhanced uptake was correlated with morphological measures of the root systems to determine which had the most benefit. A large variation of citrate-enhanced uptake over 11 root structures was observed. Root surface area dominated absolute phosphate uptake, but did not explain citrate-enhanced uptake. Number of exuding root tips correlated well with citrate-enhanced uptake. Root tips in close proximity could collectively exude high amounts of citrate, resulting in a delayed spike in citrate-enhanced uptake. Root system architecture plays an important role in citrate-enhanced uptake. Singular morphological measurements of the root systems cannot entirely explain variations in citrate-enhanced uptake. Root systems with many tips would benefit greatly from citrate exudation. Quantifying citrate-enhanced uptake experimentally is difficult as variations in root surface area would overwhelm citrate benefits.
Text
manuscript_Ammended_proofedits
- Accepted Manuscript
Text
SupplementaryMaterial_proofedits
- Accepted Manuscript
More information
Accepted/In Press date: 3 March 2020
e-pub ahead of print date: 21 March 2020
Published date: 1 July 2020
Additional Information:
Funding Information:
DMMF, CP and TR are funded by ERC Consolidator grant 646809 (Data Intensive Modelling of the Rhizosphere Processes). SR and TR are funded by BBSRC SARISA BB/L025620/1, BBSRC SARIC BB/P004180/1 and NERC NE/L00237/1; TR also is funded by EPSRC EP/M020355/1. We would like to thank Chris Topp (Danforth Center, USA) for discussions on plant phenotyping and function which contributed to this manuscript.
Publisher Copyright:
© 2020 The Authors. New Phytologist © 2020 New Phytologist Trust
Keywords:
Root system architecture, a-biotic stress, citrate, exudation, modelling, phosphorus
Identifiers
Local EPrints ID: 438879
URI: http://eprints.soton.ac.uk/id/eprint/438879
ISSN: 0028-646X
PURE UUID: ce481dbd-2f92-49b2-8eeb-1bcfc23dda8a
Catalogue record
Date deposited: 26 Mar 2020 17:30
Last modified: 17 Mar 2024 05:25
Export record
Altmetrics
Contributors
Author:
Daniel Mckay Fletcher
Author:
Tiago Gerheim Souza Dias
Author:
Chiara Petroselli
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