NDLI: Cadmium exclusion a key factor in differential Cd-resistance in Thlaspi arvense ecotypes

Content Provider	Springer Nature Link
Author	Martin, S. R. Llugany, M. Barceló, J. Poschenrieder, C.
Copyright Year	2012
Abstract	Differences in Cd accumulation and Cd tolerance between Thlaspi arvense ecotype Aigues Vives (AV) from a commercial grower in South France and ecotype Jena collected in the polluted urban area of Jena (Germany) were reported here. Ecotype Jena exhibited considerable Cd-tolerance. Shoot and root masses were unaffected and root elongation was even enhanced by exposure to 50 μM Cd. In contrast, growth of ecotype AV was severely affected by this Cd treatment. Ecotype Jena was much more efficient in excluding Cd from both roots and shoots than ecotype AV. Despite the efficient restriction of Cd transport from roots to shoots in Jena, this ecotype maintained high root to shoot transport of Zn and Fe under Cd exposure. Cd supply strongly decreased the activities of antioxidant enzymes in AV, while in the Cd resistant Jena these activities either remained unaffected (SOD, APX) or were increased (CAT) by Cd supply. In conclusion, naturally selected Cd-tolerance in Thlaspi arvense is due to efficient Cd exclusion. The mechanisms underlying exclusion of Cd from the shoots seem Cd-specific yet they did not affect the homeostasis of Fe and Zn in the shoots.
Starting Page	729
Ending Page	734
Page Count	6
File Format	PDF
ISSN	00063134
Journal	Biologia Plantarum
Volume Number	56
Issue Number	4
e-ISSN	15738264
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-01-27
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture

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