The effects of plant traits and phylogeny on soil-to-plant transfer of 99Tc
Willey, N. J. print (2010) The effects of plant traits and phylogeny on soil-to-plant transfer of 99Tc. Journal of Environmental Radioactivity, 101 (9). pp. 757-766. ISSN 0265-931X
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Publisher's URL: http://dx.doi.org/10.1016/j.jenvrad.2010.04.019
Assessments of the behaviour of 99Tc in terrestrial environments necessitate predicting soil-to-plant transfer. An experiment with 116 plant taxa showed that 99Tc transfer to plants was positively related to plant dry weight but negatively related to % dry matter and age at exposure. Activities of 99Tc 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 99Tc than Eudicots, within which Caryophyllales> Solanales> Malvales > Brassicales> Asterales> Fabales. There was a significant phylogenetic signal in soil-to-plant transfer of 99Tc. 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.
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