Reference : Copper tolerance of three Crotalaria species from southeastern D.R. Congo at the earl...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/204482
Copper tolerance of three Crotalaria species from southeastern D.R. Congo at the early development stage [Tolérance au cuivre de trois espèces de Crotalaria de l’Arc Cuprifère Katangais dans les premiers stades de croissance]
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Boisson, Sylvain mailto [Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage >]
Le Stradic, Soizig mailto [Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage >]
Commans, M. [University of Liège - Gembloux Agro-Bio Tech, BIOSE, Biodiversity and Landscape Unit, Passage des Déportés, 2, Gembloux, Belgium]
DUMONT, Anne [Centre Hospitalier Universitaire de Liège - CHU > > Secteur entretien >]
Leclerc, N. [University of Liège - Gembloux Agro-Bio Tech, BIOSE, Biodiversity and Landscape Unit, Passage des Déportés, 2, Gembloux, Belgium]
Thomas, Cynthia mailto [Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage >]
Mahy, Grégory mailto [Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage >]
2016
Biotechnologie, Agronomie, Société et Environnement
Presses Agronomiques de Gembloux
20
2
151-160
Yes (verified by ORBi)
1370-6233
1780-4507
[en] Biodiversity conservation ; Copper ; Crotalaria ; D.R. Congo ; In vitro experimentation ; Indigenous organisms ; Root length ; Seed germination ; Soil chemicophysical properties
[en] Description of the subject. Microevolutionary processes in metallophytes established on copper enriched soils can lead to a diversity of plant species showing distinct tolerance capacities among genus. Researches about the relationship between these endangered plants and soil copper concentrations are critical in order to improve ex situ conservation methods in southeastern Democratic Republic of Congo (Katangan Copperbelt). Objectives. The aim of the study was to test the effect of copper on the germination and root elongation of three Crotalaria species naturally occurring along a natural copper gradient. The hypothesis is that copper concentrations have different effects on germination and root elongation according to the species of Crotalaria genus. Method. Three species were selected: Crotalaria cobalticola, Crotalaria peschiana and Crotalaria cornetii, occurring on soils with the highest to the lowest copper concentrations respectively. Germination and root elongation tests were performed in vitro (MS vitamin-enriched medium) in six copper mediums ranging from 0 to 125 μM Cu2+. Results. No significant differences in germination percentage were observed according to the copper concentrations. Crotalaria cornetii had the lowest germination percentage. Root elongation of C. peschiana did not differ with copper concentration, but root elongation of C. cobalticola was higher at the greatest copper concentration (125 μM Cu2+). Conclusions. Even if C. cobalticola presented better growth at highest Cu concentrations, it appeared that C. cobalticola and C. peschiana do not require copper for their early stages of development and could thus be conserved in non-contaminated substrate. Crotalaria cornetii seemed to present a physical seed dormancy. © 2016, FAC UNIV SCIENCES AGRONOMIQUES GEMBLOUX. All rights reserved.
http://hdl.handle.net/2268/204482

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