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13 results on '"Joner, E.J."'

4. No significant contribution of arbuscular mycorrhizal fungi to transfer of radiocesium from soil to plants

Author

Joner, E.J., Roos, P., Jansa, J., Frossard, E., Leyval, C., and Jakobsen, I.

Subjects
Fungi -- Research, Mycorrhizas -- Research, Plants -- Food and nutrition, Plants -- Research, Biological sciences
Abstract

An investigation conducted to demonstrate whether or not arbuscular mycorrhizas fungi (AMF) can transport radiocesium from soil to plants is discussed. The implications of the findings for the bioavailability of radiocesium in different terrestrial ecosystems are described.

Published
2004

5. PAH dissipation in a contaminated river sediment under oxic and anoxic conditions

Author

Quantin, Cécile, Joner, E.J., Portal, Jean-Michel, Berthelin, J., Interactions et dynamique des environnements de surface (IDES), and Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2005

6. Uptake, assimilation and translocation of mineral elements in monoxenic cultivation systems.

Author

UCL, UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire, UCL - AGRO/CABI - Département de chimie appliquée et des bio-industries, Rufyikiri, Gervais, Kruyts, Nathalie, Declerck, Stephan, Thiry, Y., Delvaux, Bruno, Dupré de Boulois, Hervé, Joner, E.J., UCL, UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire, UCL - AGRO/CABI - Département de chimie appliquée et des bio-industries, Rufyikiri, Gervais, Kruyts, Nathalie, Declerck, Stephan, Thiry, Y., Delvaux, Bruno, Dupré de Boulois, Hervé, and Joner, E.J.

Published
2005

7. Use of mycorrhizal fungi for the phytostabilisation of radio-contaminated environment (European project MYRRH) : Overview on the scientific achievements

Author

UCL - AGRO/CABI - Département de chimie appliquée et des bio-industries, UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire, Dupré de Boulois, H., Rufyikiri, Gervais, Thiry, Y., Delvaux, B., Joner, E.J., Leyval, C., Jakobsen, I., Roos, P., Declerck, Stephan, UCL - AGRO/CABI - Département de chimie appliquée et des bio-industries, UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire, Dupré de Boulois, H., Rufyikiri, Gervais, Thiry, Y., Delvaux, B., Joner, E.J., Leyval, C., Jakobsen, I., Roos, P., and Declerck, Stephan

Abstract

Because plants significantly affect radionuclides (RN) cycling and further dispersion into the biosphere, it is important to understand the biological factors influencing RN plant uptake, accumulation and redistribution. In this respect, mycorrhizal fungi are of particular interest. The effects of ecto-mycorrhizal (ECM) and arbuscular mycorrhizal (AM) fungi on the transport of uranium (U) or radiocaesium (Cs) were investigated both under pot and in vitro culture conditions. Results obtained in vitro demonstrated that AM hyphae can take up and translocate U and Cs towards roots, while this uptake and translocation were not perceptible using pot culture systems with soil. These contrasting results could be due to different experimental conditions, including the K level in the external solution and the bio-availability of Cs. The in vitro studies also indicated that root colonisation by AM fungi might limit U and Cs root transport. Under pot culture conditions, they appeared to significantly reduce root to shoot translocation of U. Under the same conditions, ECM transport of Cs was demonstrated, and appeared to be dependent on fungal species. A better estimation of the potential use of mycorrhizal fungi for the phytoremediation of RN-contaminated areas is now available and will be further discussed.

Published
2004

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