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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2310

Title: A zinc-adapted fungus protects pines from zinc stress
Authors: ADRIAENSEN, Kristin
Van Laere, A
Issue Date: 2004
Citation: NEW PHYTOLOGIST, 161(2). p. 549-555
Abstract: Here we investigated zinc tolerance of ectomycorrhizal Scots pine (Pinus sylvestris) seedlings. An ectomycorrhizal genotype of Suillus bovinus, collected from a Zn-contaminated site and showing adaptive Zn tolerance in vitro, was compared with a nonadapted isolate from a nonpolluted area. A dose-response experiment was performed. Dynamics of plant and fungal development, and phosphate and ammonium uptake capacity, were assessed under increasing Zn stress. Effects of Zn on transpiration, nutrient content and Zn accumulation were analysed. Significant Zn-inoculation interaction effects were observed for several responses measured, including uptake rates of phosphate and ammonium; phosphorus, iron and Zn content in shoots; transpiration; biomass of external mycelia; and fungal biomass in roots. The Zn-tolerant S. bovinus genotype was particularly efficient in protecting pines from Zn stress. The growth of a Zn-sensitive genotype from a normal wild-type population was inhibited at high Zn concentrations, and this isolate could not sustain the pines' acquisition of nutrients. This study shows that well adapted microbial root symbionts are a major component of the survival strategy of trees that colonize contaminated soils.
Notes: Limburgs Univ Ctr, Ctr Environm Sci, Environm Biol Grp, B-3590 Diepenbeek, Belgium. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. Katholieke Univ Leuven, Inst Bot & Microbiol, Dev Biol Lab, B-3001 Heverlee, Belgium.Colpaert, JV, Limburgs Univ Ctr, Ctr Environm Sci, Environm Biol Grp, Univ Campus, B-3590 Diepenbeek, Belgium.jan.colpaert@luc.ac.be
URI: http://hdl.handle.net/1942/2310
DOI: 10.1046/j.1469-8137.2003.00941.x
ISI #: 000187550700022
ISSN: 0028-646X
Category: A1
Type: Journal Contribution
Validation: ecoom, 2005
Appears in Collections: Research publications

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