2026-04-17T02:26:07Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.12327/34012025-10-22T11:23:07Zcom_2072_4428com_2072_4427col_2072_487898
RECERCAT
author
Dučić, Tanja
author
Parlade, Xavier
author
Polle, Andrea
other
Producció Vegetal
group
Protecció Vegetal Sostenible
2025-10-22T11:23:06Z
2025-10-22T11:23:06Z
2008-04-24
Dučić, Tanja, Javier Parladé, and Andrea Polle. 2008. “The Influence of the Ectomycorrhizal Fungus Rhizopogon Subareolatus on Growth and Nutrient Element Localisation in Two Varieties of Douglas Fir (Pseudotsuga Menziesii Var. Menziesii and Var. Glauca) in Response to Manganese Stress.” Mycorrhiza 18 (5): 227-239. doi: 10.1007/s00572-008-0174-5
0940-6360
http://hdl.handle.net/20.500.12327/3401
https://doi.org/10.1007/s00572-008-0174-5
Acidification of forest ecosystems leads to
increased plant availability of the micronutrient manganese
(Mn), which is toxic when taken up in excess. To investigate whether ectomycorrhizas protect against excessive
Mn by improving plant growth and nutrition or by retention of excess Mn in the hyphal mantle, seedlings of
two populations of Douglas fir (Pseudotsuga menziesii),
two varieties, one being menziesii (DFM) and the other
being glauca (DFG), were inoculated with the ectomycorrhizal fungus Rhizopogon subareolatus in sand cultures.
Five months after inoculation, half of the inoculated and
non-inoculated seedlings were exposed to excess Mn in the
nutrient solution for further 5 months. At the end of this
period, plant productivity, nutrient concentrations, Mn
uptake and subcellular compartmentalisation were evaluated. Non-inoculated, non-stressed DFM plants produced
about 2.5 times more biomass than similarly treated DFG.
Excess Mn in the nutrient solution led to high accumulation
of Mn in needles and roots but only to marginal loss in
biomass. Colonisation with R. subareolatus slightly suppressed DFM growth but strongly reduced that of DFG
(−50%) despite positive effects of mycorrhizas on plant
phosphorus nutrition. Growth reductions of inoculated Douglas fir seedlings were unexpected since the degree of
mycorrhization was not high, i.e. ca. 30% in DFM and 8%
in DFG. Accumulation of high Mn was not prevented in
inoculated seedlings. The hyphal mantle of mycorrhizal
root tips accumulated divalent cations such as Ca, but not
Mn, thus not providing a barrier against excessive Mn
uptake into the plants associated with R. subareolatus.
eng
Attribution-NonCommercial-ShareAlike 4.0 International
The influence of the ectomycorrhizal fungus Rhizopogon subareolatus on growth and nutrient element localisation in two varieties of Douglas fir (Pseudotsuga menziesii var. menziesii and var. glauca) in response to manganese stress
info:eu-repo/semantics/article