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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/19192

Title: Ethylene signalling is mediating the early cadmium-induced oxidative challenge in Arabidopsis thaliana
Authors: Schellingen, Kerim
Van Der Straeten, D.
Remans, Tony
Vangronsveld, Jaco
Keunen, Els
Cuypers, Ann
Issue Date: 2015
Citation: PLANT SCIENCE, 239, p. 137-146
Abstract: Cadmium (Cd) induces the generation of reactive oxygen species (ROS) and stimulates ethylene biosynthesis. The phytohormone ethylene is a regulator of many developmental and physiological plant processes as well as stress responses. Previous research indicated various links between ethylene signalling and oxidative stress. Our results support a correlation between the Cd-induced oxidative challenge and ethylene signalling in Arabidopsis thaliana leaves. The effects of 24 or 72 h exposure to 5 M Cd on plant growth and several oxidative stress-related parameters were compared between wild-type (WT) and ethylene insensitive mutants (etr1-1, ein2-1, ein3-1). Cadmium-induced responses observed in WT plants were mainly affected in etr1-1 and ein2-1 mutants, of which the growth was less inhibited by Cd exposure as compared to WT and ein3-1 mutants. Both etr1-1 and ein2-1 showed a delayed response in the glutathione (GSH) metabolism, including GSH levels and transcript levels of GSH synthesising and recycling enzymes. Furthermore, the expression of different oxidative stress marker genes was significantly lower in Cd-exposed ein2-1 mutants, evidencing that ethylene signalling is involved in early responses to Cd stress. A model for the cross-talk between ethylene signalling and oxidative stress is proposed.
Notes: Cuypers, A (reprint author), Hasselt Univ, Ctr Environm Sci, Campus Diepenbeek,Agoralaan Bldg D, B-3590 Diepenbeek, Belgium kerim.schellingen@uhasselt.be; dominique.vanderstraeten@ugent.be; tony.remans@uhasselt.be; jaco.vangronsveld@uhasselt.be; els.keunen@uhasselt.be; ann.cuypers@uhasselt.be
URI: http://hdl.handle.net/1942/19192
DOI: 10.1016/j.plantsci.2015.07.015
ISI #: 000362306700014
ISSN: 0168-9452
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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