A - Papers appearing in refereed journals
Xing, J. P., Jiang, R. F., Ueno, D., Ma, J. F., Schat, H., McGrath, S. P. and Zhao, F-J. 2008. Variation in root-to-shoot translocation of cadmium and zinc among different accessions of the hyperaccumulators Thlaspi caerulescens and Thlaspi praecox. New Phytologist. 178 (2), pp. 315-325.
|Authors||Xing, J. P., Jiang, R. F., Ueno, D., Ma, J. F., Schat, H., McGrath, S. P. and Zhao, F-J.|
Efficient root-to-shoot translocation is a key trait of the zinc/cadmium hyperaccumulators Thlaspi caerulescens and Thlaspi praecox, but the extent of variation among different accessions and the underlying mechanisms remain unclear. Root-to-shoot translocation of Cd and Zn and apoplastic bypass flow were determined in 10 accessions of T. caerulescens and one of T. praecox, using radiolabels Cd-109 and Zn-65. Two contrasting accessions (Pr and Ga) of T. caerulescens were further characterized for TcHMA4 expression and metal compartmentation in roots. Root-to-shoot translocation of Cd-109 and Zn-65 after 1 d exposure varied 4.4 to 5-fold among the 11 accessions, with a significant correlation between the two metals, but no significant correlation with uptake or the apoplastic bypass flow. The F-2 progeny from a cross between accessions from Prayon, Belgium (Pr) and Ganges, France (Ga) showed a continuous phenotype pattern and transgression. There was no significant difference in the TcHMA4 expression in roots between Pr and Ga. Compartmentation analysis showed a higher percentage of Cd-109 sequestered in the root vacuoles of Ga than Pr, the former being less efficient in translocation than the latter. Substantial natural variation exists in the root-to-shoot translocation of Cd and Zn, and root vacuolar sequestration may be an important factor related to this variation.
|Year of Publication||2008|
|Journal citation||178 (2), pp. 315-325|
|Digital Object Identifier (DOI)||doi:10.1111/j.1469-8137.2008.02376.x|
|Open access||Published as non-open access|
|Funder||Biotechnology and Biological Sciences Research Council|
|Funder project or code||SEF|
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