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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/13794

Title: The influence of EDDS on the metabolic and transcriptional responses induced by copper in hydroponically grown Brassica carinata seedlings
Authors: Cestone, Benedetta
Cuypers, Ann
Vangronsveld, Jaco
Sgherri, Cristina
Navari-Izzo, Flavia
Issue Date: 2012
Publisher: ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Citation: PLANT PHYSIOLOGY AND BIOCHEMISTRY, 55, p. 43-51
Abstract: To improve the knowledge about the use of plants for the removal of toxic metals from contaminated soils, metabolic and transcriptional responses of Brassica carinata to different forms of copper (Cu) were studied. Two-week-old hydroponically grown seedlings were exposed for 24 h to 30 mu M CuSO4 or CuEDDS. CuSO4 appeared to be more toxic than CuEDDS as roots showed higher levels of thiobarbituric acid reactive substances (TBARS) and increased relative leakage ratios (RLR), although the superoxide dismutase (SOD, EC 1.15.1.1) activity increased following both exposures. In CuSO4-exposed seedlings the higher toxicity was underlined by increased transcription of lipoxygenases (EC 1.13.11.12) and NADPH oxidases (EC 1.6.99.6) and by the higher Cu accumulation in both tissues compared to CuEDDS exposure. The presence of EDDS increased Cu translocation, which resulted 5-times higher than when exposed to CuSO4. Decreases in catalase (CAT, EC 1.11.1.6), ascorbate peroxidase (APX. EC 1.11.1.11) and glutathione reductase (GR, EC 1.6.4.2) activities together with increases of reduced glutathione (GSH) and tocopherols and a reduction of lipoic acid (LA) were observed in roots of CuSO4-exposed seedlings. On the contrary, CuEDDS exposure induced a general increase in enzyme activities and decreases in ascorbate (AsA) and tocopherol levels. In the primary leaves, in both exposures Cu differently affected the oxidative stress responses indicating that the cellular redox balance was anyway maintained. EDDS plays a crucial role in B. carinata tolerance to oxidative stress induced by Cu and might be proposed to improve the efficiency of Cu phytoextraction. (C) 2012 Elsevier Masson SAS. All rights reserved.
Notes: [Cestone, Benedetta; Sgherri, Cristina; Navari-Izzo, Flavia] Univ Pisa, Dept Biol Agr Plants, I-56124 Pisa, Italy. [Cuypers, Ann; Vangronsveld, Jaco] Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/13794
DOI: 10.1016/j.plaphy.2012.03.011
ISI #: 000304795900006
ISSN: 0981-9428
Category: A1
Type: Journal Contribution
Validation: ecoom, 2013
Appears in Collections: Research publications

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