Uptake of 87Sr from microcline and biotite by ectomycorrhizal fungi in a Norway spruce forest

Wallander, Håkan; Hagerberg, David; Åberg, Göran

doi:10.1016/j.soilbio.2006.02.002

Cited by 17 publications

(11 citation statements)

References 31 publications

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“…(1) water influx driven by transpiration (Bangerth 1979), (2) root structure associated with cation binding sites and membrane Ca channels (White 1998), and (3) root associations with ectomycorrhizal fungi (Blum et al 2002;Wallander et al 2006). Calcium requirements can also vary by species.…”

Section: Introductionmentioning

confidence: 99%

Influences of calcium availability and tree species on Ca isotope fractionation in soil and vegetation

2008

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The calcium (Ca) isotope system is potentially of great use for understanding biogeochemical processes at multiple scales in forest ecosystems, yet remains largely unexplored for this purpose. In order to further our understanding of Ca behavior in forests, we examined two nearly adjacent hardwood-dominated catchments with differing soil Ca concentrations, developed from crystalline bedrock, to determine the variability of 44 Ca/ 40 Ca ratios (expressed as d 44 Ca) within soil and vegetation pools. For both sugar maple and American beech, the Ca isotope compositions of the measured roots and calculated bulk trees were considerably lighter than those of soil pools at these sites, suggesting that the trees were able to preferentially take up light Ca at the root-soil interface. The Ca isotope compositions of three of four root samples were among the lightest values yet reported for terrestrial materials (d 44 Ca B-3.95%). Our results further indicate that Ca isotopes were fractionated along the transpiration streams of both tree species with roots having the least d 44 Ca values and leaf litter the greatest. An approximately 2% difference in d 44 Ca values between roots and leaf litter of both tree species suggests a persistent fractionation mechanism along the transpiration stream, likely related to Ca binding in wood tissue coupled with internal ion exchange. Finally, our data indicate that differing tree species demand for Ca and soil Ca concentrations together may influence Ca isotope distribution within the trees. Intercatchment differences in Ca isotope distributions in soils and trees were minor, indicating that the results of our study may have broad transferability to studies of forest ecosystems in catchments developed on crystalline substrates elsewhere.

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Section: Introductionmentioning

confidence: 99%

Influences of calcium availability and tree species on Ca isotope fractionation in soil and vegetation

2008

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“…Twenty years later, the situation has not really changed. Most recent cultivation-based studies on EM are still performed with seedling of pines or spruces (Bois et al 2006;Van Hees et al 2006;Wallander et al 2006), oaks (Boling et al 2006) or cedars (Boukcim et al 2006).…”

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confidence: 99%

Why and How Using Micropropagated Trees rather than Germinations for Controlled Synthesis of Ectomycorrhizal Associations?

Herrmann

Buscot

2008

Mycorrhiza

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“…Ectotrophic mycorrhiza fungi can assist host plants to more effectively absorbing and utilizing Ca, K, Mg, P and other nutrient elements from soil minerals (Arocena and Glowa 2000;Blum et al 2002;Finlay et al 2009;Martino and Perotto 2010;Uroz et al 2009;Wallander et al 2006). Microbial weathering of minerals may provide a source of abundant mineral nutrients for the soil ecological system (Blum et al 2002;Gadd and Raven 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Instead, isotopic Sr can be used as a tracer for qualitative and quantitative determination of the sources of Ca and other cations from a mineral mixture Sr release as a result of weathering (Åberg et al 1989;Bain and Bacon 1994;Blum et al 2000Blum et al , 2002Blum and Erel 1995;Bullen and Bailey 2005;Capo et al 1998;Chadwick et al 2009;Drouet et al 2007;Miller et al 1993;Shand et al 2009;Wallander 2000;Wallander et al 2006). The Sr isotope method can be used to assess the effect of exotrophic fungi on weathering of soil minerals in the rhizosphere, and to measure Sr release as a result of weathering (Bullen and Bailey 2005;Wallander 2000).…”

Section: Introductionmentioning

confidence: 99%

Sr Isotope Tracing of Differences in the Effects of Microorganisms on Weathering of Calcite and Apatite

Chen

Lian

Zheng

et al. 2012

Geomicrobiology Journal

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To study differences in the effects of microorganisms on weathering of calcite and apatite, one strain of Aspergillus niger (A. niger) and one strain of Penicillium glaucum (P. glaucum), which respectively contain the mixture of calcite and apatite were cultivated for 24 days in the sucrose-potato culture medium, supernatant was taken every three days from the culture medium, followed by the determination of Ca 2+ and Sr 2+ contents and Sr isotopic ratios. The results of measurement showed that the Sr isotope ratios in the supernatant from the culture medium are intermediate between those of the end-member constituents calcite and apatite (0.70721-0.70861). Results of isotope mixing equations to calculation showed that in the first 15 days A. niger played a dominant role in weathering of calcite in the apatite/calcite mixture. The contribution rate of apatite for Ca 2+ in the solution increased from 39.0% on the 18th day to 61.6% on the 24th day; P. glaucum played a key role in weathering of apatite in the first 3 days. Ions dissolved from apatite account for 73.9% of the total. It is known from the results of Sr isotope tracing that in the prior period of fungus cultivation A. niger plays a key role in weathering of calcite while P. glaucum plays a key role in weathering of apatite. The ability of P. glaucum to weather calcite tends to intensify progressively over time. Therefore, Sr isotope tracing can be used to accurately recognize differences in the effects of microorganisms on weathering of minerals.

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Uptake of 87Sr from microcline and biotite by ectomycorrhizal fungi in a Norway spruce forest

Cited by 17 publications

References 31 publications

Influences of calcium availability and tree species on Ca isotope fractionation in soil and vegetation

Influences of calcium availability and tree species on Ca isotope fractionation in soil and vegetation

Why and How Using Micropropagated Trees rather than Germinations for Controlled Synthesis of Ectomycorrhizal Associations?

Sr Isotope Tracing of Differences in the Effects of Microorganisms on Weathering of Calcite and Apatite

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