Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 325226
Title Ecological strategies of ectomycorrhizal fungi of Salix repens: root manipulation versus root replacement
Author(s) Heijden, E.W. van der; Kuyper, T.W.
Source Oikos 103 (2003). - ISSN 0030-1299 - p. 668 - 680.
Department(s) Sub-department of Soil Quality
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) arbuscular mycorrhizal infection - pine pinus-sylvestris - hebeloma-cylindrosporum - willow ectomycorrhizas - paxillus-involutus - dune ecosystems - l. communities - phosphorus - nitrogen - growth
Abstract The ecological significance of a range of ectomycorrhizal fungal species, associated with Salix repens, was investigated under controlled conditions. Different ectomycorrhizas increased plant benefits in various ways. Effects of 12 ectomycorrhizal fungi on short-term (12 weeks) and long-term (20 and 30 weeks) plant performance were compared. Different fungi increased plant benefits in different ways and none exerted the full range of mycorrhizal benefits. Two strategies of EcM fungi were recognized, root manipulation and root replacement. Species (Hebeloma, Cortinarius spp.) with a root manipulation strategy strongly increased root length and had a more effective nitrogen economy than species with the root replacement strategy (Laccaria, Paxillus spp.). As a consequence of these different strategies two parameters of nutrient acquisition, viz. nutrient inflow per unit root length (efficiency) and total shoot nutrient uptake (effectiveness) were not correlated. Differences in magnitude of mycorrhizal response were not related to the amount of root colonization. Only in the short term was plant nutrient content positively correlated with root length colonized. Over a whole growing season plant nutrient content could not be predicted from root length colonized. Effects of mycorrhizal fungi on root manipulation also occurred with aqueous extracts of the fungus and, hence, were partly independent of the formation of ectomycorrhizas.
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