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Extramatrical mycelial growth, biomass allocation and nitrogen uptake in ectomycorrhizal systems in response to collembolan grazing

Ek, Hans; Öhrn, Maria Sjögren LU ; Arnebrant, Kristina LU and Söderström, Bengt LU (1994) In Agriculture, Ecosystems & Environment. Applied Soil Ecology 1(2). p.155-169
Abstract
The effects of Collembola grazing activities on the ectomycorrhizal symbiosis were studied in laboratory microcosms. Pinus contorta seedlings in association with Paxillus involutus were grown in a sandy soil and the Collembola Onychiurus armatus was added in different densities. To study effects on nutrient uptake by the extramatrical mycorrhizal mycelium, cups containing 15NH4+ and phytin amended soil were evenly distributed in the microcosms. These cups were covered with a net that allowed the mycelium to penetrate but neither Collembola nor plant roots.



Extramatrical hyphal growth was impeded at a high density of O. Armatus. Low densities of O. armatus increased the extramatrical hyphal growth, the colonization rate... (More)
The effects of Collembola grazing activities on the ectomycorrhizal symbiosis were studied in laboratory microcosms. Pinus contorta seedlings in association with Paxillus involutus were grown in a sandy soil and the Collembola Onychiurus armatus was added in different densities. To study effects on nutrient uptake by the extramatrical mycorrhizal mycelium, cups containing 15NH4+ and phytin amended soil were evenly distributed in the microcosms. These cups were covered with a net that allowed the mycelium to penetrate but neither Collembola nor plant roots.



Extramatrical hyphal growth was impeded at a high density of O. Armatus. Low densities of O. armatus increased the extramatrical hyphal growth, the colonization rate of side plants and the biomass of P. involutus. However, the amount of P. involutus on/in the plant roots was not affected. Thus, low densities of collembolans induced a shift towards a larger proportion of P. involutus growing extramatrically. The presence of O. armatus in low numbers enhanced the uptake and transfer of 15N by P. involvus to the plants by up to 76%. The Collembola population growth was not higher in mycorrhizal compared with non-mycorrhizal microcosms while nematode population size was reduced in mycorrhizal compared with non-mycorrhizal microcosms. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ATP, Compensated growth, Ergosterol, Fungus, Onychiurus armatus, Paxillus involutus
in
Agriculture, Ecosystems & Environment. Applied Soil Ecology
volume
1
issue
2
pages
155 - 169
publisher
Elsevier
external identifiers
  • scopus:38149147205
ISSN
0929-1393
DOI
10.1016/0929-1393(94)90035-3
language
English
LU publication?
yes
id
cc180664-01c2-4a6f-96dc-7efd7ace0373 (old id 2255852)
date added to LUP
2012-01-16 13:46:50
date last changed
2017-10-22 03:46:46
@article{cc180664-01c2-4a6f-96dc-7efd7ace0373,
  abstract     = {The effects of Collembola grazing activities on the ectomycorrhizal symbiosis were studied in laboratory microcosms. Pinus contorta seedlings in association with Paxillus involutus were grown in a sandy soil and the Collembola Onychiurus armatus was added in different densities. To study effects on nutrient uptake by the extramatrical mycorrhizal mycelium, cups containing 15NH4+ and phytin amended soil were evenly distributed in the microcosms. These cups were covered with a net that allowed the mycelium to penetrate but neither Collembola nor plant roots.<br/><br>
<br/><br>
Extramatrical hyphal growth was impeded at a high density of O. Armatus. Low densities of O. armatus increased the extramatrical hyphal growth, the colonization rate of side plants and the biomass of P. involutus. However, the amount of P. involutus on/in the plant roots was not affected. Thus, low densities of collembolans induced a shift towards a larger proportion of P. involutus growing extramatrically. The presence of O. armatus in low numbers enhanced the uptake and transfer of 15N by P. involvus to the plants by up to 76%. The Collembola population growth was not higher in mycorrhizal compared with non-mycorrhizal microcosms while nematode population size was reduced in mycorrhizal compared with non-mycorrhizal microcosms.},
  author       = {Ek, Hans and Öhrn, Maria Sjögren and Arnebrant, Kristina and Söderström, Bengt},
  issn         = {0929-1393},
  keyword      = {ATP,Compensated growth,Ergosterol,Fungus,Onychiurus armatus,Paxillus involutus},
  language     = {eng},
  number       = {2},
  pages        = {155--169},
  publisher    = {Elsevier},
  series       = {Agriculture, Ecosystems & Environment. Applied Soil Ecology},
  title        = {Extramatrical mycelial growth, biomass allocation and nitrogen uptake in ectomycorrhizal systems in response to collembolan grazing},
  url          = {http://dx.doi.org/10.1016/0929-1393(94)90035-3},
  volume       = {1},
  year         = {1994},
}