The University of Southampton
University of Southampton Institutional Repository

Traits related to differences in function among three arbuscular mycorrhizal fungi

Record type: Article

Diversity in phosphorus (P) acquisition strategies was assessed among three species of arbuscular mycorrhizal fungi (AMF) isolated from a single field in Switzerland. Medicago truncatula was used as a test plant. It was grown in a compartmented system with root and root-free zones separated by a fine mesh. Dual radioisotope labeling (32P and 33P) was employed in the root-free zone as follows: 33P labeling determined hyphal P uptake from different distances from roots over the entire growth period, whereas 32P labeling investigated hyphal P uptake close to the roots over the 48 hours immediately prior to harvest. Glomus intraradices, Glomus claroideum and Gigaspora margarita were able to take up and deliver P to the plants from maximal distances of 10, 6 and 1 cm from the roots, respectively. Glomus intraradices most rapidly colonized the available substrate and transported significant amounts of P towards the roots, but provided the same growth benefit as compared to Glomus claroideum, whose mycelium was less efficient in soil exploration and in P uptake and delivery to the roots. These differences are probably related to different carbon requirements by these different Glomus species. Gigaspora margarita provided low P benefits to the plants and formed dense mycelium networks close to the roots where P was probably transiently immobilized. Numerical modeling identified possible mechanisms underlying the observed differences in patterns of mycelium growth. High external hyphal production at the root-fungus interface together with rapid hyphal turnover were pointed out as important factors governing hyphal network development by Gigaspora, whereas nonlinearity in apical branching and hyphal anastomoses were key features for G. intraradices and G. claroideum, respectively.

PDF fulltext.pdf - Version of Record
Restricted to Repository staff only
Download (366kB)

Citation

Thonar, Cécile, Schnepf, Andrea, Fossard, Emmanuel, Roose, Tiina and Jansa, Jan (2011) Traits related to differences in function among three arbuscular mycorrhizal fungi Plant and Soil, 339, (1-2), pp. 231-245. (doi:10.1007/s11104-010-0571-3).

More information

Published date: 29 September 2011
Keywords: arbuscular mycorrhiza, extraradical mycelium, functional diversity, hyphal growth model, medicago truncatula, phosphorus

Identifiers

Local EPrints ID: 184647
URI: http://eprints.soton.ac.uk/id/eprint/184647
PURE UUID: 9d18d30e-d358-4c5a-be57-3d2cdd851779

Catalogue record

Date deposited: 09 May 2011 08:39
Last modified: 18 Jul 2017 11:51

Export record

Altmetrics

Contributors

Author: Cécile Thonar
Author: Andrea Schnepf
Author: Emmanuel Fossard
Author: Tiina Roose
Author: Jan Jansa

University divisions


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.

×