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Title: | Identifying the Pressure Points of Acute Cadmium Stress Prior to Acclimation in Arabidopsis thaliana | Authors: | DECKERS, Jana HENDRIX, Sophie Prinsen, Els VANGRONSVELD, Jaco CUYPERS, Ann |
Issue Date: | 2020 | Publisher: | MDPI | Source: | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 21 (17) (Art N° 6232) | Abstract: | The toxic metal cadmium (Cd) is a major soil pollutant. Knowledge on the acute Cd-induced stress response is required to better understand the triggers and sequence of events that precede plant acclimation. Therefore, we aimed to identify the pressure points of Cd stress using a short-term exposure setup ranging from 0 h to 24 h. Acute responses related to glutathione (GSH), hydrogen peroxide (H 2 O 2), 1-aminocyclopropane-1-carboxylic acid (ACC), ethylene and the oxidative challenge were studied at metabolite and/or transcript level in roots and leaves of Arabidopsis thaliana either exposed or not to 5 µM Cd. Cadmium rapidly induced root GSH depletion, which might serve as an alert response and modulator of H 2 O 2 signalling. Concomitantly, a stimulation of root ACC levels was observed. Leaf responses were delayed and did not involve GSH depletion. After 24 h, a defined oxidative challenge became apparent, which was most pronounced in the leaves and concerted with a strong induction of leaf ACC synthesis. We suggest that root GSH depletion is required for a proper alert response rather than being a merely adverse effect. Furthermore, we propose that roots serve as command centre via a.o. root-derived ACC/ethylene to engage the leaves in a proper stress response. | Keywords: | Arabidopsis thaliana;cadmium;acute responses;glutathione;hydrogen peroxide;1-aminocyclopropane-1-carboxylic acid;ethylene;oxidative challenge | Document URI: | http://hdl.handle.net/1942/31960 | ISSN: | 1661-6596 | e-ISSN: | 1422-0067 | DOI: | 10.3390/ijms21176232 | ISI #: | WOS:000569661800001 | Rights: | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2021 |
Appears in Collections: | Research publications |
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ijms-21-06232.pdf | Published version | 2.63 MB | Adobe PDF | View/Open |
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