title: The effects of plant traits and phylogeny on soil-to-plant transfer of 99Tc.
abstract: Assessments of the behaviour of (99)Tc in terrestrial environments necessitate predicting soil-to-plant transfer. An experiment with 116 plant taxa showed that (99)Tc transfer to plants was positively related to plant dry weight but negatively related to % dry matter and age at exposure. Activities of (99)Tc analysed by hierarchical ANOVA coded with an angiosperm phylogeny revealed significant effects, with 55% of the variance between species explained at the Ordinal level and above. Monocots had significantly lower transfer of (99)Tc than Eudicots, within which Caryophyllales > Solanales > Malvales > Brassicales > Asterales > Fabales. There was a significant phylogenetic signal in soil-to-plant transfer of (99)Tc. This phylogenetic signal is used to suggest that, for example, a nominal Tc Transfer Factor of 5 could be adjusted to 2.3 for Monocots and 5.3 for Eudicots.
authors.affiliation: Centre for Research in Plant Science, University of the West of England, Coldharbour Lane, Frenchay, Bristol, BS16 1QY, UK. Neil.Willey@uwe.ac.uk
authors.forename: N J
authors.initials: NJ
authors.lastname: Willey
authors.forename: S
authors.initials: S
authors.lastname: Tang
authors.forename: A
authors.initials: A
authors.lastname: McEwen
authors.forename: S
authors.initials: S
authors.lastname: Hicks
mesh_terms: D040582:Inheritance Patterns; D010802:Phylogeny; D010944:Plants / Q000737:chemistry / Q000145:classification / Q000378:metabolism*; D012990:Soil Pollutants, Radioactive / Q000032:analysis* / Q000378:metabolism; D013667:Technetium / Q000032:analysis* / Q000378:metabolism
chemical_list: D012990:Soil Pollutants, Radioactive; D013667:Technetium