Penrose, B and Johnson nee Payne, KA and Arkhipov, A and Maksimenko, A and Gaschak, S and Meacham, MC and Crout, NJM and White, PJ and Beresford, NA and Broadley, MR, Inter-cultivar variation in soil-to-plant transfer of radiocaesium and radiostrontium in Brassica oleracea, Journal of Environmental Radioactivity, 155-156 pp. 112-121. ISSN 0265-931X (2016) [Refereed Article]
© 2016 The Authors. Published by Elsevier Ltd. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/
Radiocaesium and radiostrontium enter the human food chain primarily via soil-plant transfer. However, uptake of these radionuclides can differ significantly within species (between cultivars). The aim of this study was to assess inter-cultivar variation in soil-to-plant transfer of radiocaesium and radiostrontium in a leafy crop species, Brassica oleracea. This study comprised four independent experiments: two pot experiments in a controlled environment artificially contaminated with radiocaesium, and two field experiments in an area contaminated with radiocaesium and radiostrontium in the Chernobyl Exclusion Zone. Radiocaesium concentration ratios varied 35-fold among 27 cultivars grown in pots in a controlled environment. These 27 cultivars were then grown with a further 44 and 43 other cultivars in the Chernobyl Exclusion Zone in 2003 and 2004, respectively. In the field-grown cultivars radiocaesium concentration ratios varied by up to 35-fold and radiostrontium concentration ratios varied by up to 23-fold.
In three of these experiments (one pot experiment, two field experiments) one out of the 27 cultivars was found to have a consistently lower radiocaesium concentration ratio than the other cultivars. The two field experiments showed that, five out of the 66 cultivars common to both experiments had consistently lower radiocaesium concentration ratios, and two cultivars had consistently lower radiostrontium concentration ratios. One cultivar had consistently lower radiocaesium and radiostrontium concentration ratios.
The identification of cultivars that have consistently lower radiocaesium and/or radiostrontium concentration ratios suggests that cultivar selection or substitution may be an effective remediation strategy in radiologically contaminated areas. Future research should focus on plant species that are known to be the largest contributors to human dose.
|Item Type:||Refereed Article|
|Keywords:||caesium, strontium, remediation, inter-cultivar variation, plant|
|Research Division:||Environmental Sciences|
|Research Group:||Soil sciences|
|Research Field:||Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding knowledge|
|Objective Field:||Expanding knowledge in the agricultural, food and veterinary sciences|
|UTAS Author:||Penrose, B (Dr Beth Penrose)|
|Web of Science® Times Cited:||12|
|Deposited By:||Agriculture and Food Systems|
|Downloads:||50 View Download Statistics|
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