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Nicotianamine over-accumulation confers resistance to nickel in Arabidopsis thaliana Inra
Pianelli, K.; Mari, S.; Marques, L.; Lebrun, M.; Czernic, P..
Nicotianamine is a methionine derivative involved in iron homeostasis, able to bind various other metals in vitro. To investigate its role in vivo, we expressed a nicotianamine synthase cDNA (TcNAS1) isolated from the polymetallic hyperaccumulator Thlaspi caerulescens in Arabidopsis thaliana. Transgenic plants expressing TcNAS1 over-accumulated NA, up to 100-fold more than wild type plants. Furthermore, increased NA levels in different transgenic lines were quantitatively correlated with increased nickel tolerance. The tolerance to nickel is expressed at the cellular level in protoplast experiments and is associated with an increased NA content. We have also shown that the most NA-over accumulating line showed a high tolerance to nickel and a significant...
Tipo: Journal Article Palavras-chave: BIOREMEDIATION; BIODECONTAMINATION; RESILIENCE NICOTIANAMINE; NICKEL RESISTANCE; PHYTOREMEDIATION; THLASPI CAERULESCENS; POLYMETALLIC HYPERACCUMULATOR.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20072904f103&uri=/notices/prodinra1/2007/02/
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