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A comparison of caesium uptake kinetics in eight species of grass

Broadley, M. R.; Willey, N. J.; Philippidis, C.; Dennis, E. R.; Willey, Neil

Authors

M. R. Broadley

N. J. Willey

C. Philippidis

E. R. Dennis

Neil Willey Neil.Willey@uwe.ac.uk
Professor in Env Plant Physiology



Abstract

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., Elymus repens (L.) Gould, Poa annua L., Lolium perenne L. var. 'Taya', Anthoxanthum odoratum L., Festuca gigantea (L.) Vill., Festuca ovina L. and Nardus stricta L.). There were species differences in I(max) and C(min), a positive relationship between K(m) and RGR (r2 = 0.53; p = 0.03), and a negative relationship between C(min) and RGR (r2 = 0.89; p = 0.001) in 0 d K starved plants. In general, I (max) increased with K starvation, as previously reported for K uptake kinetics. K(m) increased with K starvation, contrasting with reported studies on K, and C(min) decreased, although all species did not respond similarly.

Citation

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

Journal Article Type Article
Publication Date Jan 1, 1999
Deposit Date Feb 9, 2015
Publicly Available Date Mar 29, 2024
Journal Journal of Environmental Radioactivity
Print ISSN 0265-931X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 46
Issue 2
Pages 225-236
DOI https://doi.org/10.1016/S0265-931X%2898%2900128-3
Keywords caesium, plant uptake, michaelis–menten kinetics
Public URL https://uwe-repository.worktribe.com/output/1096271
Publisher URL http://dx.doi.org/10.1016/S0265-931X(98)00128-3