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Phylogeny and growth strategy as predictors of differences in cobalt concentrations between plant species (2008)
Journal Article
Willey, N., & Wilkins, J. (2008). Phylogeny and growth strategy as predictors of differences in cobalt concentrations between plant species. Environmental Science and Technology, 42(6), 2162-2167. https://doi.org/10.1021/es071531r

Analyses reported here quantify the contribution of plant phylogeny and plant growth strategy to soil-to-plant transfer of Co. Estimated relative mean (ERM) Co concentrations in shoots of 241 species of flowering plant were derived using a residual m... Read More about Phylogeny and growth strategy as predictors of differences in cobalt concentrations between plant species.

Some effects of nitrogen nutrition on caesium uptake and translocation by species in the Poaceae, Asteraceae and Caryophyllidae (2006)
Journal Article
Willey, N., & Tang, S. (2006). Some effects of nitrogen nutrition on caesium uptake and translocation by species in the Poaceae, Asteraceae and Caryophyllidae. Environmental and Experimental Botany, 58(1-3), 114-122. https://doi.org/10.1016/j.envexpbot.2005.07.001

There is current interest in managing and manipulating 137Cs transfer from soil to plants. We hypothesized that N source might affect Cs uptake by plants and report experiments that confirm this. Uptake experiments using hydroponics with a variety of... Read More about Some effects of nitrogen nutrition on caesium uptake and translocation by species in the Poaceae, Asteraceae and Caryophyllidae.

An analysis of intertaxa differences in sulfur concentration in angiosperms (2006)
Journal Article
Willey, N., & Wilkins, J. (2006). An analysis of intertaxa differences in sulfur concentration in angiosperms. Journal of Plant Nutrition and Soil Science, 169(5), 717-727. https://doi.org/10.1002/jpln.200520590

Understanding the behavior of sulfur (S) in the soil-plant system is important for crop production, for predicting the movement of the radioisotope 35S in the environment, and for investigating the role of S in plant metabolism of xenobiotics. A data... Read More about An analysis of intertaxa differences in sulfur concentration in angiosperms.

A phylogenetic effect on strontium concentrations in angiosperms (2006)
Journal Article
Willey, N., & Fawcett, K. (2006). A phylogenetic effect on strontium concentrations in angiosperms. Environmental and Experimental Botany, 57(3), 258-269. https://doi.org/10.1016/j.envexpbot.2005.06.005

A Residual Maximum Likelihood (REML) procedure was used to compile Sr concentrations in 103 plant species from experiments with Sr concentrations in 66 plant species from the literature. There were 14 species in common between experiments and the lit... Read More about A phylogenetic effect on strontium concentrations in angiosperms.

Inter-taxa differences in root uptake of 103/106Ru by plants (2006)
Journal Article
Willey, N., & Fawcett, K. (2006). Inter-taxa differences in root uptake of 103/106Ru by plants. Journal of Environmental Radioactivity, 86(2), 227-240. https://doi.org/10.1016/j.jenvrad.2005.09.002

Ruthenium-106 is of potential radioecological importance but soil-to-plant Transfer Factors for it are available only for few plant species. A Residual Maximum Likelihood (REML) procedure was used to construct a database of relative 103/106Ru concent... Read More about Inter-taxa differences in root uptake of 103/106Ru by plants.

Species selection for phytoremediation of 36Cl/35Cl using angiosperm phylogeny and inter-taxa differences in uptake (2005)
Journal Article
Willey, N., & Fawcett, K. (2005). Species selection for phytoremediation of 36Cl/35Cl using angiosperm phylogeny and inter-taxa differences in uptake. International Journal of Phytoremediation, 7(4), 295-306. https://doi.org/10.1080/16226510500327152

High concentrations of 35Cl and the radioisotope 36Cl (produced naturally by cosmic radiation and anthropogenically by U fission and the use of neutron sources) can be problematic in soil, but are potentially amenable to phytoremediation if appropria... Read More about Species selection for phytoremediation of 36Cl/35Cl using angiosperm phylogeny and inter-taxa differences in uptake.

Predicting inter-taxa differences in plant uptake of cesium-134/137 (2005)
Journal Article
Willey, N., Tang, S., & Watt, N. R. (2005). Predicting inter-taxa differences in plant uptake of cesium-134/137. Journal of Environmental Quality, 34(5), 1478-1489. https://doi.org/10.2134/jeq2004.0454

For 134/137Cs, and many other soil contaminants, research into transfer to plants has focused on particular crops and phytoremediation candidates, producing uptake data for a small proportion of all plant taxa. Despite the significance of differences... Read More about Predicting inter-taxa differences in plant uptake of cesium-134/137.

Selecting plants to minimise radiocaesium in the food chain (2003)
Journal Article
Escobar-Gutiérrez, A. J., White, P. J., Swarup, K., Escobar-Gutierrez, A., Bowen, H. C., Willey, N., & Broadley, M. R. (2003). Selecting plants to minimise radiocaesium in the food chain. Plant and Soil, 249(1), 177-186. https://doi.org/10.1023/A%3A1022593307224

Caesium (Cs) is an alkali metal with chemical properties similar to potassium (K). It has no known role in plant nutrition and it is not toxic to plants at the micromolar concentrations occurring naturally in soil solutions. However, two radioisotope... Read More about Selecting plants to minimise radiocaesium in the food chain.

Soil availability, plant uptake and soil to plant transfer of 99Tc - A review (2003)
Journal Article
Bennett, R., & Willey, N. (2003). Soil availability, plant uptake and soil to plant transfer of 99Tc - A review. Journal of Environmental Radioactivity, 65(2), 215-231. https://doi.org/10.1016/S0265-931X%2802%2900098-X

The fission yield of 99Tc from 239Pu and 235U is similar to that of 137Cs or 90Sr and it is therefore an important component of nuclear weapons fall-out, nuclear waste and releases from nuclear facilities. There is particular current interest in 99Tc... Read More about Soil availability, plant uptake and soil to plant transfer of 99Tc - A review.

Topology: A novel method to describe branching patterns in Peronospora viciae colonies (2003)
Journal Article
Johnston, M. A., Ott, A., Spencer-Phillips, P. T., & Willey, N. (2003). Topology: A novel method to describe branching patterns in Peronospora viciae colonies. Mycological Research, 107(10), 1123-1131. https://doi.org/10.1017/S0953756203008384

Topology provides a novel means to describe branching patterns and has not been applied to fungal colonies previously. For any branched structure, various topologies are possible, and these lie between two extremes, a herringbone pattern (main axis w... Read More about Topology: A novel method to describe branching patterns in Peronospora viciae colonies.

Phytoextractio of 137Cs: The effect of soil 137Cs concentration on 137Cs uptake by Beta vulgaris (2002)
Journal Article
Watt, N. R., Willey, N., Hall, S. C., & Cobb, A. (2002). Phytoextractio of 137Cs: The effect of soil 137Cs concentration on 137Cs uptake by Beta vulgaris. Acta Biotechnologica, 22(1-2), 183-188. https://doi.org/10.1002/1521-3846%28200205%2922%3A1/2%3C183%3A%3AAID-ABIO183%3E3.0.CO%3B2-K

The last phase for MAGNOX ELECTRIC plc's reactor decommissioning strategy is site clearance and delicencing. Phytoextraction of 137Cs may be able to assist in meeting this objective. Field trials using Beta vulgaris conducted at Bradwell Nuclear Powe... Read More about Phytoextractio of 137Cs: The effect of soil 137Cs concentration on 137Cs uptake by Beta vulgaris.

Phylogenetic variation in heavy metal accumulation in angiosperms (2001)
Journal Article
Baker, A. J., Willey, N. J., Broadley, M. R., Willey, N., Wilkins, J. C., Baker, A. J. M., …White, P. J. (2001). Phylogenetic variation in heavy metal accumulation in angiosperms. New Phytologist, 152(1), 9-27. https://doi.org/10.1046/j.0028-646x.2001.00238.x

• The influence of phylogeny on shoot heavy metal content in plants was investigated and the hypothesis tested that traits impacting on the accumulation of cadmium, chromium, copper, nickel, lead and zinc in plant shoots are associated. • Data suitab... Read More about Phylogenetic variation in heavy metal accumulation in angiosperms.

Influx and accumulation of Cs+ by the akt1 mutant of Arabidopsis thaliana (L.) Heynh. lacking a dominant K+ transport system (2001)
Journal Article
Willey, N. J., Escobar-Gutiérrez, A. J., Broadley, M. R., Escobar-Gutierrez, A., Bowen, H. C., Willey, N., & White, P. J. (2001). Influx and accumulation of Cs+ by the akt1 mutant of Arabidopsis thaliana (L.) Heynh. lacking a dominant K+ transport system. Journal of Experimental Botany, 52(357), 839-844. https://doi.org/10.1093/jexbot/52.357.839

An extensive literature reports that Cs+, an environmental contaminant, enters plant cells through K+ transport systems. Several recently identified plant K+ transport systems are permeable to Cs+. Permeation models indicate that most Cs+ uptake into... Read More about Influx and accumulation of Cs+ by the akt1 mutant of Arabidopsis thaliana (L.) Heynh. lacking a dominant K+ transport system.

Assessing the Potential of Phytoremediation at a Site in the U.K. Contaminated with 137Cs (2001)
Journal Article
Mudiganti, A., Willey, N., Hall, S., & Mudigantia, A. (2001). Assessing the Potential of Phytoremediation at a Site in the U.K. Contaminated with 137Cs. International Journal of Phytoremediation, 3(3), 321-333. https://doi.org/10.1080/15226510108500062

Spinacia oleracea L. cv. 'Bloomsdale', Beta vulgaris L. cv. 'Flavescens', Brassica juncea L. 'OB825', and Helianthus annuus L. cv. 'Oranges and Lemons' were grown for 8 weeks at a site contaminated with 137Cs at Bradwell Nuclear Power Station, UK. Th... Read More about Assessing the Potential of Phytoremediation at a Site in the U.K. Contaminated with 137Cs.

A method to assess taxonomic variation in shoot caesium concentration among flowering plants (1999)
Journal Article
Willey, N. J., Broadley, M. R., Willey, N., & Mead, A. (1999). A method to assess taxonomic variation in shoot caesium concentration among flowering plants. Environmental Pollution, 106(3), 341-349. https://doi.org/10.1016/S0269-7491%2899%2900105-0

A method was developed to obtain relative shoot caesium (Cs) concentration data from the literature and assess the influence of plant taxonomy on these values. A residual maximum likelihood (REML) analysis was performed on data from 14 published stud... Read More about A method to assess taxonomic variation in shoot caesium concentration among flowering plants.

A comparison of caesium uptake kinetics in eight species of grass (1999)
Journal Article
Dennis, E. R., Philippidis, C., Willey, N. J., Broadley, M. R., & Willey, N. (1999). A comparison of caesium uptake kinetics in eight species of grass. Journal of Environmental Radioactivity, 46(2), 225-236. https://doi.org/10.1016/S0265-931X%2898%2900128-3

The Michaelis-Menten kinetic parameters (I(max) K(m) and C(min)) of CS uptake were estimated using a solution-depletion method, after 0, 1 and 4 d K-starvation in eight mature grass species of different relative growth rates (Bromus sterilis L., Elym... Read More about A comparison of caesium uptake kinetics in eight species of grass.

Differences in root uptake of radiocaesium by 30 plant taxa (1997)
Journal Article
Willey, N. J., Broadley, M. R., & Willey, N. (1997). Differences in root uptake of radiocaesium by 30 plant taxa. Environmental Pollution, 97(1-2), 11-15. https://doi.org/10.1016/S0269-7491%2897%2900090-0

The concentration of Cs was measured in the shoots of 30 taxa of plants after exposing the roots for 6 h to 0.1 μg radiolabelled Cs g-1 soil. There were maximum differences between Chenopodium quinoa and Koeleria macrantha of 20-fold in Cs concentrat... Read More about Differences in root uptake of radiocaesium by 30 plant taxa.