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. https://doi.org/10.1111/j.1469-8137.2008.02376.x
Authors | Xing, J. P., Jiang, R. F., Ueno, D., Ma, J. F., Schat, H., McGrath, S. P. and Zhao, F-J. |
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Abstract | 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. |
Keywords | Plant Sciences |
Year of Publication | 2008 |
Journal | New Phytologist |
Journal citation | 178 (2), pp. 315-325 |
Digital Object Identifier (DOI) | https://doi.org/10.1111/j.1469-8137.2008.02376.x |
PubMed ID | 18266619 |
Open access | Published as green open access |
Funder | Biotechnology and Biological Sciences Research Council |
Funder project or code | SEF |
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 | |
Publisher's version | |
Publisher | Wiley |
ISSN | 0028-646X |
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