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Functional characterization of NRAMP3 and NRAMP4 from the metal hyperaccumulator Thlaspi caerulescens Inra
Oomen, R.; Wu, J.; Lilièvre, F.; Blanchet, S.; Richaud, P.; Barbier-Brygoo, H.; Aarts, M. G. M.; Thomine, S..
The ability of metal hyperaccumulating plants to tolerate and accumulate heavy metals results from adaptations of metal homeostasis. NRAMP metal transporters were found to be highly expressed in some hyperaccumulating plant species. Here, we identified TcNRAMP3 and TcNRAMP4, the closest homologues to AtNRAMP3 and AtNRAMP4 in Thlaspi caerulescens and characterized them by expression analysis, confocal imaging and heterologous expression in yeast and Arabidopsis thaliana. TcNRAMP3 and TcNRAMP4 are expressed at higher levels than their A. thaliana homologues. When expressed in yeast TcNRAMP3 and TcNRAMP4 transport the same metals as their respective A. thaliana orthologues: iron (Fe), manganese (Mn) and cadmium (Cd) but not zinc (Zn) for NRAMP3; Fe, Mn, Cd...
Tipo: Journal Article Palavras-chave: CADMIUM; HYPERACCULULATOR; METAL TRANSPORT; NRAMP; THLASPI CAERULESCENS; ZINC.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20109c2f089f&uri=/notices/prodinra1/2010/12/
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Genome-wide transcriptome profiling of the early cadmium response of Arabidopsis roots and shoots Inra
Herbette, S.; Taconnat, L.; Hugouvieux, V.; Piette, L.; Magniette, M.L.; Cuine, S.; Auroy, P.; Richaud, P.; Forestier, C.; Bourguignon, J.; Renou, J.P.; Vavasseur, A.; Leonhardt, N..
Transcriptional regulation in response to cadmium treatment was investigated in both roots and leaves of Arabidopsis, using the whole genome CATMA microarray containing at least 24,576 independent probe sets. Arabidopsis plants were hydroponically treated with low (5 mu M) or high (50 mu M) cadmium concentrations during 2, 6, and 30 hours. At each time point, Cd level was determined using ICP-AES showing that both plant tissues are able to accumulate the heavy metal. RT-PCR of eight randomly selected genes confirmed the reliability of our microarray results. Analyses of response profiles demonstrate the existence of a regulatory network that differentially modulates gene expression in a tissue- and kinetic-specific manner in response to cadmium. One of the...
Tipo: Journal Article Palavras-chave: TRANSCRIPTION; METABOLISME SOUFRE MICROARRAY; SULFUR METABOLISM.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007c9bee07b&uri=/notices/prodinra1/2008/08/
Registros recuperados: 2
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