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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/13985

Title: Nanoscale channels on ectomycorrhizal-colonized chlorite: Evidence for plant-driven fungal dissolution
Authors: Gazze, Salvatore A.
Saccone, Loredana
Ragnarsdottir, K. Vala
Duran, Adele L.
Leake, Jonathan R.
Banwart, Steven A.
McMaster, Terence J.
Issue Date: 2012
Abstract: The roots of many trees in temperate and boreal forests are sheathed with ectomycorrhizal fungi (EMF) that extend into the soil, forming intimate contact with soil minerals, from which they absorb nutrient elements required by the plants and, in return, are supported by the organic carbon photosynthesized by the trees. While EMF are strongly implicated in mineral weathering, their effects on mineral surfaces at the nanoscale are less documented. In the present study, we investigated the effects of symbiotic EMF on the topography of a chlorite mineral using atomic force microscopy. A cleaning protocol was successfully applied to remove fungal hyphae without altering the underlying mineral structure and topography. Examination of the exposed chlorite surface showed the presence of primary channels, of the order of a micron in width and up to 50 nm in depth, the morphology of which strongly indicates a fungal-induced origin. Smaller secondary channels were observed extending from the primary channels and would appear to be involved in their enlargement. The presence of channels is the first nanoscale demonstration of the effects of fungal interaction, fuelled by plant photosynthate, on the topography of a chlorite mineral, and it provides clear evidence of the ability of EMF to enhance mineral dissolution.
Notes: McMaster, TJ (reprint author)[McMaster, Terence J.] Univ Bristol, Bristol Ctr Funct Nanomat, Bristol BS8 1FD, Avon, England. [Ragnarsdottir, K. Vala] Univ Iceland, Sch Engn & Nat Sci, Inst Earth Sci, Reykjavik, Iceland. [Smits, Mark M.] Hasselt Univ, Dept Environm Biol, Diepenbeek, Belgium. [Duran, Adele L.; Leake, Jonathan R.] Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England. [Banwart, Steven A.] Univ Sheffield, Dept Civil & Struct Engn, Kroto Res Inst, Sheffield, S Yorkshire, England. [Gazze, Salvatore A.; Saccone, Loredana; McMaster, Terence J.] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1FD, Avon, England. t.mcmaster@bristol.ac.uk
URI: http://hdl.handle.net/1942/13985
DOI: 10.1029/2012JG002016
ISI #: 000307740600003
ISSN: 0148-0227
Category: A1
Type: Journal Contribution
Validation: ecoom, 2013
Appears in Collections: Research publications

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