title: Mycorrhizal fungi modify element distribution in gametophytes and sporophytes of a fern Pellaeaviridis from metaliferous soils.
abstract: In the present study, the element distribution within mycothallic and nonmycothallic gametophytes and the early stages of sporophyte development of Pellaea viridis (Pteridaceae) were investigated. Gametophytes of this fern were collected from soil samples originating in the ultramafic area of the Agnes Mine near Barberton, South Africa. The gametophytes were grown on both the original soil and on a plant growth substratum obtained from the local botanical garden. Gametophytes and young sporophytes grown on substratum inoculated with Glomus tenue or non-inoculated were freeze-dried, and the distribution of elements was studied using micro-PIXE. The GeoPIXE II software package was used for quantitative elemental mapping complemented by data extracted from arbitrarily selected micro-areas. The obtained results suggest that although the fern itself avoids the uptake of large amounts of heavy metals, increased levels of Ni, Cr, Fe, Co and Ti were found in the part of the gametophyte that hosted the fungal endophyte. This finding suggests that the fungus might be active in the immobilisation of certain potentially toxic metals that are taken up from the soil by the plant, although other mechanisms cannot be excluded. For the first time, precise, quantitative measurements of the concentration of individual elements in the fern gametophytes and young sporophytes were obtained, along with their distribution within the plant parts.
authors.affiliation: Institute of Environmental Sciences of the Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland. katarzyna.turnau@uj.edu.pl
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Turnau
authors.forename: Wojciech J
authors.initials: WJ
authors.lastname: Przybyłowicz
authors.forename: Przemysław
authors.initials: P
authors.lastname: Ryszka
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Orłowska
authors.forename: Teresa
authors.initials: T
authors.lastname: Anielska
authors.forename: Jolanta
authors.initials: J
authors.lastname: Mesjasz-Przybyłowicz
mesh_terms: D029624:Ferns / Q000187:drug effects* / Q000254:growth & development / Q000382:microbiology; D055993:Germ Cells, Plant / Q000187:drug effects / Q000378:metabolism; D019216:Metals, Heavy / Q000737:chemistry / Q000378:metabolism*; D038821:Mycorrhizae / Q000187:drug effects* / Q000378:metabolism; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D012984:Software; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism*; D013052:Spectrometry, X-Ray Emission; D013559:Symbiosis; D014018:Tissue Distribution
chemical_list: D019216:Metals, Heavy; D012989:Soil Pollutants
keywords: Metal transfer; Mycorrhiza; Mycothallic ferns; Phytoremediation; Symbiosis; X-ray microanalysis