Journal
ENVIRONMENTAL POLLUTION
Volume 147, Issue 1, Pages 50-59Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2006.08.026
Keywords
Thlaspi praecox; heavy metal; zinc; lead; cadmium; metal hyperaccumulation; TXRF; micro-PIXE
Categories
Ask authors/readers for more resources
Cd, Zn and Pb accumulation, spatial distribution within seeds and germinating seedlings, and seeds fitness of metal hyperaccumulating Thlaspi praecox were investigated in order to gain more knowledge on plant reproductive success at metal polluted sites. The seeds contained up to 1351 mu g g(-1) (dry weight) of Cd, 121 mu g g(-1) of Zn and 17 mu g g(-1) of Pb. Seed fitness was negatively influenced by seed Cd hyperaccumulation. Nevertheless, the viability of seeds was decreased by maximally 20%, indicating very efficient tolerance of the plant embryos to Cd. Localisation by micro-PIXE revealed preferential storage of most elements in the embryonic axis. Cd and Zn were preferentially localised in the epidermis of cotyledons. The restriction of seed Pb and Zn uptake and hyperaccumulation of Cd, accompanied by partitioning of Cd in the epidermal tissues of cotyledons, may enable the survival of T. praecox embryos and seedlings in Cd polluted environments. (c) 2006 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available