Related Experiment Videos
Inter-taxa differences in root uptake of 103/106Ru by plants
1Centre for Research in Plant Science, Faculty of Applied Sciences, University of the West of England, Frenchay, Bristol BS16 1QY, UK. neil.willey@uwe.ac.uk
Journal of Environmental Radioactivity
|November 1, 2005
Summary
Ruthenium-106 soil-to-plant transfer varies significantly among plant species, with uptake influenced by plant evolutionary relationships. Accounting for plant phylogeny improves predictions for Ruthenium-106 transfer factors.
Area of Science:
- Radioecology
- Plant Science
- Environmental Science
Background:
- Ruthenium-106 (Ru-106) is a radionuclide of radioecological concern.
- Limited data exists on soil-to-plant Transfer Factors (TFs) for Ru-106 across diverse plant species.
Purpose of the Study:
- To construct a comprehensive database of relative Ru-106 concentrations in flowering plants.
- To investigate the influence of plant phylogeny on Ru-106 uptake.
- To improve models predicting soil-to-plant Ru-106 transfer.
Main Methods:
- Utilized a Residual Maximum Likelihood (REML) procedure to build a database of relative Ru-106 concentrations in 114 plant species.
- Employed Analysis of Variance (ANOVA) with a recent flowering plant phylogeny to assess phylogenetic effects.
- Analyzed inter-species variation in Ru-106 uptake.
Main Results:
- Observed a 2,465-fold difference in Ru-106 uptake among plant species.
- Phylogeny explained 39% of the variance in Ru-106 concentration differences at the Order level or higher.
- Orders Geraniales and Asterales showed high Ru-106 uptake, while Commelinoid monocots, particularly Poaceae, exhibited low uptake.
Conclusions:
- Plant species are not independent units regarding Ru-106 concentration due to phylogenetic links.
- Soil variables alone do not solely determine Ru-106 transfer.
- Incorporating plant phylogeny into models can enhance predictions of soil-to-plant Ru-106 transfer, especially for species lacking available TFs.