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Research Interests: Political Science and SpW
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-La sécheresse chronique, liée à l'étroitesse des trous de plantation, au tassement du sol, au recouvrement imperméable des abords,… ; -Les conditions asphyxiques dues, en grande partie, aux mêmes raisons ; -Les facteurs chimiques :... more
-La sécheresse chronique, liée à l'étroitesse des trous de plantation, au tassement du sol, au recouvrement imperméable des abords,… ; -Les conditions asphyxiques dues, en grande partie, aux mêmes raisons ; -Les facteurs chimiques : pH inadéquat, salinité élevée, ...
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Effets de l'inoculation mycorhizienne du substrat sur la croissance et la résistance au stress hydrique de cinq espèces fixatrices de dunes : Acacia raddiana Savi ; Acacia nilotica (L.) Willd. Ex Del. var. adansonii ; Acacia senegal (L.) Willd ; Prosopis chilensis Stunz. et Bauhinia rufescens Lammore
Résumé: Un substrat de culture naturel, non stérilisé, a été inoculé par un complexe mycorhizien de souches indigènes, provenant des sols de Gouré, ou par du Glomus intraradices. Les effets de l'inoculation ont été observés sur... more
Résumé: Un substrat de culture naturel, non stérilisé, a été inoculé par un complexe mycorhizien de souches indigènes, provenant des sols de Gouré, ou par du Glomus intraradices. Les effets de l'inoculation ont été observés sur cinq espèces ligneuses, dont ...
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In order to understand reactions of tomato roots towards NaCl stress when they are independent from photosynthetic organs, a stable and reliable technique for root culture was developed. It consisted of growing excised root tips of... more
In order to understand reactions of tomato roots towards NaCl stress when they are independent from photosynthetic organs, a stable and reliable technique for root culture was developed. It consisted of growing excised root tips of defined length in a shaken nutrient solution having a simple composition of Murashige and Skoog (MS) mineral nutrients, vitamin mix and sucrose, without the addition of any growth hormones. Special attention has been paid to standardise the culture technique because of the high sensitivity of root growth to environmental factors. In the first experiment, concentrations of 50 and 100 mM NaCl were used, subsequently, NaCl concentration was restricted to 75 mM, a single moderate stress level allowing the number of replications to be increased for more accurate statistical analysis. The roots of four L. esculentum Mill.cultivars, the ABA-deficient mutant flacca and ecotypes of Lycopersicon pennellii (corr.) d’Arcy, L. chilense Dunn. and L. cheesmanii f. minor (Hook f.) C. H. Mull, were successfully tested using the same technique.
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In the wake of the observation by Hülster and Marschner (Hülster A., Müller JF and Marschner H. 1994) that zucchini (Cucurbita pepo L. var. Diamant) absorbs large quantities of polychlorodibenzo-p-dioxins and polychlorodi-benzofurans... more
In the wake of the observation by Hülster and Marschner (Hülster A., Müller JF and Marschner H. 1994) that zucchini (Cucurbita pepo L. var. Diamant) absorbs large quantities of polychlorodibenzo-p-dioxins and polychlorodi-benzofurans (PCDD/Fs) through its roots ...
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Abstract:[fr] En Wallonie, les sites potentiellement contaminés se comptent par milliers. La région subit aujourd'hui les conséquences de son manque historique de législations environnementales. Parmi les contaminants présents... more
Abstract:[fr] En Wallonie, les sites potentiellement contaminés se comptent par milliers. La région subit aujourd'hui les conséquences de son manque historique de législations environnementales. Parmi les contaminants présents sur ces sites, les plus préoccupants ...
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ABSTRACT
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La recherche de plantes résistantes à la sécheresse, en privilégiant le critère de précocité (développement phénologique rapide), est restée empirique pendant longtemps. Une telle approche limite cependant le rendement potentiel des... more
La recherche de plantes résistantes à la sécheresse, en privilégiant le critère de précocité (développement phénologique rapide), est restée empirique pendant longtemps. Une telle approche limite cependant le rendement potentiel des cultures, ce qui a conduit à s' ...
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Résumé: La sélection des céréales dans les régions à contraintes hydriques fortes et aléatoires nécessite de comprendre les mécanismes de résistance à la sécheresse, leurs interactions et leurs effets sur le rendement. Compte tenu de ces... more
Résumé: La sélection des céréales dans les régions à contraintes hydriques fortes et aléatoires nécessite de comprendre les mécanismes de résistance à la sécheresse, leurs interactions et leurs effets sur le rendement. Compte tenu de ces considérations et de l' ...
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In the wake of the observation by Hülster and Marschner (Hülster A., Müller JF and Marschner H. 1994) that zucchini (Cucurbita pepo L. var. Diamant) absorbs large quantities of polychlorodibenzo-p-dioxins and polychlorodi-benzofurans... more
In the wake of the observation by Hülster and Marschner (Hülster A., Müller JF and Marschner H. 1994) that zucchini (Cucurbita pepo L. var. Diamant) absorbs large quantities of polychlorodibenzo-p-dioxins and polychlorodi-benzofurans (PCDD/Fs) through its roots ...
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Résumé De nombreux arbres urbains, du domaine public ou privé, subissent régulièrement des tailles sévères (étêtage, rapprochement, ravalement). Outre les problèmes sanitaires que la formation de grandes plaies peut poser, ces... more
Résumé De nombreux arbres urbains, du domaine public ou privé, subissent régulièrement des tailles sévères (étêtage, rapprochement, ravalement). Outre les problèmes sanitaires que la formation de grandes plaies peut poser, ces interventions affaiblissent à court et ...
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Research Interests: Political Science and SpW
Effects of the addition of an indigenous mycorrhizal complex, coming from soils of Gouré and of Glomus intraradices in a non sterile culture substrate were assessed on five woody species, among which 3 acacias (A. nilotica, A. raddiana,... more
Effects of the addition of an indigenous mycorrhizal complex, coming from soils of Gouré and of Glomus intraradices in a non sterile culture substrate were assessed on five woody species, among which 3 acacias (A. nilotica, A. raddiana, A. senegal), Bauhinia rufescens and Prosopis chilensis, in a tree nursery and on a sand dune of Gouré. In the nursery, species underwent a water stress by interrupting the watering during six days. Foliar hydration has been determined in order to evaluate the respective effects of the mycorrhizal inoculation for water loss limitation. Mycorrhizal root colonization has been determined as well as plant height and total biomass. In a field experiment, inoculated and non inoculated species have been planted on a mechanically prefixed sand dune portion in order to evaluate the effects of mycorrhizal inoculations on growth in the field. Results in nursery showed that (i) the non sterile soil would contain some endogenous AMF (arbuscular mycorrhizal fungi) ...
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Seven woody species, of which five natives (Acacia senegal, A. raddiana, A. nilotica, Bauhinia rufescens, Balanites aegyptiaca) and two imported (Prosopis juliflora and P. chilensis) have been tested in terms of biological sand dunes... more
Seven woody species, of which five natives (Acacia senegal, A. raddiana, A. nilotica, Bauhinia rufescens, Balanites aegyptiaca) and two imported (Prosopis juliflora and P. chilensis) have been tested in terms of biological sand dunes fixation in the Southern east of Niger Republic. In nursery , species underwent a water stress by interrupting the watering during six days. Foliar hydration has been determined in order to evaluate their capacity to limit water loss. In a field experiment, species have been planted on a mechanically prefixed sand dune cord in order to test their ability for stabilization of sand dunes. Survival rates during the first three years have been calculated and height growth was measured. In nursery, results showed that, after six days of water stress, Acacia senegal, A. raddiana, P. chilensis and A. nilotica are the four species limiting the best the water losses. Results on site showed that the best combination in sand dunes fixation, in this zone, would be ...
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-La sécheresse chronique, liée à l'étroitesse des trous de plantation, au tassement du sol, au recouvrement imperméable des abords,… ; -Les conditions asphyxiques dues, en grande partie, aux mêmes raisons ; -Les facteurs chimiques :... more
-La sécheresse chronique, liée à l'étroitesse des trous de plantation, au tassement du sol, au recouvrement imperméable des abords,… ; -Les conditions asphyxiques dues, en grande partie, aux mêmes raisons ; -Les facteurs chimiques : pH inadéquat, salinité élevée, ...
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... Paris : Institut pour le Développement Forestier. Focant G., Gerrebos Y., Vanstipelen O. & Cleda M., 2005. Préserver les arbres : recommandations pour éviter les dégâts aux arbres. Jambes, Belgique : Édition Danielle Sarlet,... more
... Paris : Institut pour le Développement Forestier. Focant G., Gerrebos Y., Vanstipelen O. & Cleda M., 2005. Préserver les arbres : recommandations pour éviter les dégâts aux arbres. Jambes, Belgique : Édition Danielle Sarlet, DGATLP-DGRNE. ...
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The potential of kenaf (Hibiscus cannabinus L.) and corn (Zea mays L.) for accumulation of cadmium and zinc was investigated. Plants have been grown in lysimetres containing dredging sludge, a substratum naturally rich in trace metals.... more
The potential of kenaf (Hibiscus cannabinus L.) and corn (Zea mays L.) for accumulation of cadmium and zinc was investigated. Plants have been grown in lysimetres containing dredging sludge, a substratum naturally rich in trace metals. Biomass production was determined. Sludge and water percolating from lysimeters were analyzed by atomic absorption spectrometry. No visible symptoms of toxicity were observed during the three- month culture. Kenaf and corn tolerate trace metals content in sludge. Results showed that Zn and Cd were found in corn and kenaf shoots at different levels, 2.49 mg/kg of Cd and 82.5 mg/kg of Zn in kenaf shoots and 2.1 mg/kg of Cd and 10.19 mg/kg in corn shoots. Quantities of extracted trace metals showed that decontamination of Zn and Cd polluted substrates is possible by corn and kenaf crops. Tolerance and bioaccumulation factors indicated that both species could be used in phytoremediation.
Research Interests: Microbiology, Biodegradation, Zinc, Hibiscus, Cadmium, and 3 moreZea mays, Sewage, and Soil Pollutants
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The potential of kenaf (Hibiscus cannabinus L.) and corn (Zea mays L.) for accumulation of cadmium and zinc was investigated. Plants have been grown in lysimetres containing dredging sludge, a substratum naturally rich in trace metals.... more
The potential of kenaf (Hibiscus cannabinus L.) and corn (Zea mays L.) for accumulation of cadmium and zinc was investigated. Plants have been grown in lysimetres containing dredging sludge, a substratum naturally rich in trace metals. Biomass production was determined. Sludge and water percolating from lysimeters were analyzed by atomic absorption spectrometry. No visible symptoms of toxicity were observed during the three- month culture. Kenaf and corn tolerate trace metals content in sludge. Results showed that Zn and Cd were found in corn and kenaf shoots at different levels, 2.49 mg/kg of Cd and 82.5 mg/kg of Zn in kenaf shoots and 2.1 mg/kg of Cd and 10.19 mg/kg in corn shoots. Quantities of extracted trace metals showed that decontamination of Zn and Cd polluted substrates is possible by corn and kenaf crops. Tolerance and bioaccumulation factors indicated that both species could be used in phytoremediation.
Research Interests: Microbiology, Biodegradation, Zinc, Hibiscus, Cadmium, and 3 moreZea mays, Sewage, and Soil Pollutants
ABSTRACT In the wake of the observation made by Hülster and Neumann that zucchini absorbs large quantities of dioxins and furans through its roots, our research is aimed at contributing to the description of the mechanism involved.... more
ABSTRACT In the wake of the observation made by Hülster and Neumann that zucchini absorbs large quantities of dioxins and furans through its roots, our research is aimed at contributing to the description of the mechanism involved. According to the current hypothesis, a ...
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Hessian fly, Mayetiola destructor (Say), is one of the most destructive pest of wheat (Triticum species) worldwide. In Morocco, damage caused by Hessian fly can result in total crop loss if high infestations occur during early stages of... more
Hessian fly, Mayetiola destructor (Say), is one of the most destructive pest of wheat (Triticum species) worldwide. In Morocco, damage caused by Hessian fly can result in total crop loss if high infestations occur during early stages of crop development. Genes that confer ...