Inter-varietal variation in caesium and strontium uptake by plants: a meta-analysis

Penrose, Beth; Beresford, N.A.; Broadley, Martin R.; Crout, N.M.J.

doi:10.1016/j.jenvrad.2014.10.005

Cited by 23 publications

(18 citation statements)

References 39 publications

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“…Gerstmann and Schimmack () found a difference in soil‐to‐grain transfer of fallout 90 Sr among 28 analyzed winter wheat cultivars, and Putyatin et al () in accumulation of 90 Sr in the grain of six spring wheat cultivars. On the basis of studies conducted with 27 plant species, Penrose et al () found that the ratio of the maximum to minimum concentrations of Sr ranged from 1.0 to 4.5, suggesting that exploitation of inter‐varietal variation could be used to reduce the transfer of Sr in plants but also in remediation strategies.…”

Section: Resultsmentioning

confidence: 99%

Strontium accumulation in whole grain of Aegilops and Triticum species

Kastori

Maksimović

Denčić

et al. 2017

J. Plant Nutr. Soil Sci.

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Plant species differ in their ability to accumulate mineral elements. Differences also exist among genotypes, lines, and varieties within species. Strontium (Sr) enters the food chain primarily via plants, and wheat products are amongst the most important pathways by which Sr enters the human body. The aim of this study was to analyze the accumulation of Sr in whole grain of various Aegilops and Triticum species with different genomes (AA, BB, BBAA, BBAADD, and DD). During three experimental years plants were grown in temperate continental climate on a calcareous, gleyic chernozem soil. The results reveal that the studied species and genomes differed significantly in Sr accumulation in the grains. The average Sr concentration of the grains ranged, depending on the year of study and genotype, from 0.70 to 3.89 mg kg−1 DM. The grain of wild diploid Aegilops speltoides with BB genome contained significantly more Sr than all of the other analyzed genotypes. Grains of wild and cultivated tetraploid wheat genotypes had the lowest Sr concentration. The modern cultivated hexaploid wheat varieties displayed substantial variation in Sr concentration in the grains. The examined genotypes also differed significantly with respect to their mass of 1000 grains, which was the smallest in Aegilops speltoides. There was a significantly negative correlation between the average mass of a 1000 grains and concentration of Sr. The results show that even when the background concentration of Sr was relatively low, wheat genotypes accumulated it in the grains, although to a different extent. Therefore, selection of wheat genotypes which accumulate less Sr in the grain could contribute to improve food quality.

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Section: Resultsmentioning

confidence: 99%

Strontium accumulation in whole grain of Aegilops and Triticum species

Kastori

Maksimović

Denčić

et al. 2017

J. Plant Nutr. Soil Sci.

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“…temporary grasslands cover nearly 1.4 million ha in the UK; [32]), research into exploiting variation in radiocaesium and radiostrontium uptake by different plant cultivars has focussed mainly on human food crop species [12]. Of these studies, most included fewer than 20 cultivars [12], exceptions being Penrose et al ., 2016 [33] (70 cultivars; Brassica oleracea ) Ohmori et al ., [34] (85; Oryza sativa ) and Moiseev et al ., [35] (99 cultivars; Pisum sativum ). Therefore, to our knowledge, this study, where a total of 397 cultivars from four common forage grass species (hybrid ryegrass ( Lolium perenne L. x Lolium multiflorum Lam.…”

Section: Discussionmentioning

confidence: 99%

“…The inter-cultivar variations found in these experiments (Cs = up to 14-fold; Sr = up to 4.4-fold) were generally higher than those found in Alexakhin [39] ( 137 Cs inter-cultivar variation = 1.4–4.5 fold), where between 4–15 cultivars from 10 plant species were studied and Penrose et al . [12] (Cs inter-cultivar variation = 1.8; Sr inter-cultivar variation = 2.0) in which 115 experiments including between 2 and 28 cultivars (Cs) and 2 and 99 cultivars (Sr) from over 50 species were collated. Previous studies that have included a greater number of cultivars, for example Ohmori et al ., (2014) [34], which investigated variation in 137 Cs activity concentrations among 85 rice ( Oryza sativa ) cultivars and Penrose et al ., (2016) [33], which investigated variation in 137 Cs and 90 Sr concentration ratios in c .…”

Section: Discussionmentioning

confidence: 99%

“…Conversely, cultivar substitution for a given crop is likely to be readily applicable, socially acceptable and require no new skills, knowledge or markets. However, not enough is known about its efficacy for it to be widely recommended [12][13]. …”

Section: Introductionmentioning

confidence: 99%

“…However, other studies have found significant genotype x environment interactions for both ryegrasses [17] and fescues [17] [19] [18], and therefore cultivars with apparently high or low elemental shoot concentrations may behave inconsistently over multiple sites and/or years. Environmental factors can have a large effect on the uptake of Cs and Sr, and identifying cultivars that display consistently low concentration ratios over time and between sites has previously been challenging [12]. …”

Section: Introductionmentioning

confidence: 99%

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Forage grasses with lower uptake of caesium and strontium could provide ‘safer’ crops for radiologically contaminated areas

et al. 2017

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Substitution of a species or cultivar with higher uptake of an element by one with lower uptake has been proposed as a remediation strategy following accidental releases of radioactivity. However, despite the importance of pasture systems for radiological dose, species/cultivar substitution has not been thoroughly investigated for forage grasses. 397 cultivars from four forage grass species; hybrid ryegrass (Lolium perenne L. x Lolium multiflorum Lam.), perennial ryegrass (Lolium perenne L.), Italian ryegrass (Lolium multiflorum Lam.) and tall fescue (Festuca arundinacea Shreb.); were sampled from 19 field-based breeding experiments in Aberystwyth and Edinburgh (UK) in spring 2013 and analysed for caesium (Cs) and strontium (Sr) concentrations. In order to calculate concentration ratios (CRs; the concentration of an element in a plant in relation to the concentration in the soil), soils from the experiments were also analysed to calculate extractable concentrations of Cs and Sr. To test if cultivars have consistently low Cs and Sr concentration ratios, 17 hybrid ryegrass cultivars were sampled from both sites again in summer 2013 and spring and summer 2014. Tall fescue cultivars had lower Cs and Sr CRs than the other species. Three of the selected 17 hybrid ryegrass cultivars had consistently low Cs CRs, two had consistently low Sr CRs and one had consistently low Cs and Sr CRs. Cultivar substitution could reduce Cs CRs by up to 14-fold and Sr CRs by 4-fold in hybrid ryegrass. The identification of species and cultivars with consistently low CRs suggests that species or cultivar substitution could be an effective remediation strategy for contaminated areas.

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