Record ID No. |
2659 |
Author(s) |
Christophe C., Marie-Pierre T., Stephane U., Elisabeth L., Antoine K., Pascale F K. , 2010 |
Affiliation |
INRA, UR1138 "Biogeochimie des Ecosystemes Forestiers", Centre de Nancy, 54280 Champenoux, France. chriscalva@hotmail.com; turpault@nancy.inra.fr |
Title |
Laccaria bicolor S238N improves Scots pine mineral nutrition by increasing root nutrient uptake from soil minerals but does not increase mineral weathering. |
Source. Vol.(no):Page |
Plant and Soil 328(1/2): 145-154p. |
Categories |
Ectomycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Host |
Scots pine (Pinus sylvestris L.) |
Organism |
Laccaria bicolor |
Country |
France, Europe |
Abstracts |
The role of ectomycorrhizal fungi on mineral nutrient mobilization and uptake is crucial for tree nutrition and growth in temperate forest ecosystems. By using a "mineral weathering budget" approach, this study aims to quantify the effect of the symbiosis with the ectomycorrhizal model strain Laccaria bicolor S238N on mineral weathering and tree nutrition, carrying out a column experiment with a quartz/biotite substrate. Each column was planted with one Scots pine (Pinus sylvestris L.) non-mycorrhizal or mycorrhizal with L. bicolor, with exception of the abiotic control treatment. The columns were continuously supplied with a nutrient-poor solution. A mineral weathering budget was calculated for K and Mg. The pine shoot growth was significantly increased (73%) when plants were mycorrhizal with L. bicolor. Whatever their mycorrhizal status, pines increased mineral weathering by factors 1.5 to 2.1. No difference between non-mycorrhizal and mycorrhizal pine treatments was revealed, however, mycorrhizal pines assimilated significantly more K and Mg. This suggests that in our experimental conditions, L. bicolor S238N improved shoot growth and K and Mg assimilation in Scots pine mainly by increasing the uptake of dissolved nutrients, linked to a better exploration and exploitation of the soil by the mycorrhizal roots. |