Por favor, use este identificador para citar o enlazar este ítem: http://cicy.repositorioinstitucional.mx/jspui/handle/1003/743
Glutathione plays a role in protecting leaves of Salvinia minima from Pb2+ damage associated with changes in the expression of SmGS genes and increased activity of GS
NEYI ELOISA ESTRELLA GOMEZ
ENRIQUE SAURI DUCH
JOSE OMAR ZAPATA PEREZ
JORGE MANUEL SANTAMARIA FERNANDEZ
Acceso Abierto
Atribución-NoComercial-SinDerivadas
DOI: 10.1016/j.envexpbot.2011.09.001
 AQUATIC FERN
CHLOROPHYLLS
GS
GSH
HEAVY METAL
LEAD ACCUMULATION
SMGS GENE
The relationship between accumulation of Pb2+ and changes in GSH biosynthesis was analyzed in both leaves and roots of the Pb2+-hyperaccumulator aquatic fern Salvinia minima, after exposure to 40μM Pb(NO3)2. Lead accumulation in both tissues increased the accumulation of GSH, increased the enzymatic activity of glutathione synthase (GS), and caused changes in the expression levels of SmGS genes in both tissues. The damage caused by Pb on plant performance, was evaluated by the changes in the content of pigments, particularly on the carotenoids content. Lead accumulation caused more damage in roots than in leaves as indicated by the decrease on their carotenoids content. It is interesting that in leaves, the concentration of GSH, the activity of GS and the expression levels of SmGS gene were all higher than in roots. These results, together with our previous finding that roots accumulated more phytochelatins than did leaves of S. minima plants exposed to similar concentrations of lead (Estrella et al., 2009), suggest that the Pb-hyperaccumulator aquatic fern, S. minima, displays a coordinated and differential response to Pb2+ at leaves and roots, where GSH may play an important role in protecting leaves from the detrimental effects of lead, perhaps by counteracting the effect of free radicals.
2012
Artículo
Environmental and Experimental Botany, 75, 188-194. doi:10.1016/j.envexpbot.2011.09.001
Inglés
Estrella-Gómez, N. E., Sauri-Duch, E., Zapata-Pérez, O., & Santamaría, J. M. (2012). Glutathione plays a role in protecting leaves of salvinia minima from Pb2+ damage associated with changes in the expression of SmGS genes and increased activity of GS. Environmental and Experimental Botany, 75, 188-194. doi:10.1016/j.envexpbot.2011.09.001
BIOLOGÍA Y QUÍMICA
Versión publicada
publishedVersion - Versión publicada
Aparece en las colecciones: Artículos de Investigación Arbitrados

Cargar archivos:


Fichero Descripción Tamaño Formato  
2012_AI_id20405_SantamariaF.PDF605.06 kBAdobe PDFVisualizar/Abrir