A - Papers appearing in refereed journals
Hernandez-Allica, J., Garbisu, C., Becerril, J. M., Barrutia, O., Garcia-Plazaola, J. I., Zhao, F-J. and McGrath, S. P. 2006. Synthesis of low molecular weight thiols in response to Cd exposure in Thlaspi caerulescens. Plant, Cell and Environment. 29 (7), pp. 1422-1429.
|Authors||Hernandez-Allica, J., Garbisu, C., Becerril, J. M., Barrutia, O., Garcia-Plazaola, J. I., Zhao, F-J. and McGrath, S. P.|
In this study, we investigated the accumulation of phytochelatins (PCs) and other low molecular weight (LMW) thiols in response to Cd exposure in two contrasting ecotypes differing in Cd accumulation. Using a root elongation test, we found that the highly accumulating ecotype Ganges was more tolerant to Cd than the low Cd-accumulation ecotype Prayon.L-buthionine-(S,R)-sulphoximine (BSO), a potent inhibitor of the gamma-glutamylcysteine synthetase (gamma-ECS) (an enzyme involved in the PC biosynthetic pathway), increased the Cd sensitivity of Prayon, but had no effect on Ganges. Although PC accumulation increased in response to Cd exposure, no significant differences were observed between the two ecotypes. Cd exposure induced a dose-dependent accumulation of both Cys and a still unidentified LMW thiol in roots of both ecotypes. Root accumulation of Cys and this thiol was higher in Ganges than in Prayon; the ecotypic differences were more pronounced when the plants were treated with BSO. These findings suggest that PCs do not contribute to the Cd hypertolerance displayed by the Ganges ecotype of Thlaspi caerulescens, whereas Cys and other LMW thiols might be involved.
|Year of Publication||2006|
|Journal||Plant, Cell and Environment|
|Journal citation||29 (7), pp. 1422-1429|
|Digital Object Identifier (DOI)||doi:10.1111/j.1365-3040.2006.01525.x|
|Open access||Published as non-open access|
|Funder project or code||512|
|Soil protection and remediation by chemical and biological approaches|
|Hills Bequest - Physiological and genetic analysis of the mechanisms of zinc and cadmium accumulation by natural hyperaccumulator plants|
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