Carbon partitioning in a split-root system of arbuscular mycorrhizal plants is fungal and plant species dependent
Article first published online: 3 MAR 2003
Volume 157, Issue 3, pages 589–595, March 2003
How to Cite
Lerat, S., Lapointe, L., Gutjahr, S., Piché, Y. and Vierheilig, H. (2003), Carbon partitioning in a split-root system of arbuscular mycorrhizal plants is fungal and plant species dependent. New Phytologist, 157: 589–595. doi: 10.1046/j.1469-8137.2003.00691.x
- Issue published online: 3 MAR 2003
- Article first published online: 3 MAR 2003
- Received: 26 June 2002 Accepted: 14 November 2002
- arbuscular mycorrhizal (AM) fungi;
- carbon sink;
- colonization levels;
- barley (Hordeum vulgare);
- sugar maple (Acer saccharum);
- Glomus intraradices;
- Glomus mosseae;
- Gigaspora rosea
- • Root carbon (C) partitioning in two host plant species colonized by one of three arbuscular mycorrhizal (AM) fungal species was investigated.
- • Split-root systems of barley (Hordeum vulgare) and sugar maple (Acer saccharum) were inoculated on one side with one of three AM fungi. Leaves were labelled with 14CO2 3 wk after inoculation. Plants were harvested 24 h later and the root systems from the mycorrhizal (M) and nonmycorrhizal (NM) sides were analysed separately for 14C.
- • Partitioning of 14C between M and NM sides varied depending on the fungal and host plant species used. Gigaspora rosea showed a strong C-sink capacity with both plant species, Glomus intraradices showed a strong C-sink capacity with barley, and Glomus mosseae did not affect 14C partitioning. The C-sink strength of the M barley roots inoculated with G. rosea or G. intraradices was linearly correlated with the degree of colonization.
- • The use of three AM fungal and two plant species allowed us to conclude that C-sink strength of AM fungi depends on both partners involved in the symbiosis.