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| Content Provider | Springer Nature Link |
|---|---|
| Author | Źróbek Sokolnik, Anna Asard, Han Górska Koplińska, Kamilla Górecki, Ryszard J. |
| Copyright Year | 2008 |
| Abstract | Generation of reactive oxygen species (ROS) constitutes an important first reaction under many stress conditions in plants. We demonstrate that Nicotiana tabacum L. cv. Bright Yellow 2 (TBY-2) cells in suspension cultures, generate superoxide radical and hydrogen peroxide upon treatment with cadmium and zinc. Addition of catalase and N,N-diethyldithiocarbamate (DDC) decreased the level of H$_{2}$O$_{2}$, whereas superoxide dismutase (SOD) induced a slight increase of the H$_{2}$O$_{2}$ production. The effects of catalase, DDC and SOD on the heavy metal-induced ROS production indicate that it occurs outside of the cells, and that at least part of the hydrogen peroxide is produced by dismutation of the superoxide radical (O$_{2}$ $^{·−}$). The effect of pretreatment of the cell cultures with commonly used mammalian NADPH oxidase inhibitors was also tested. Strong inhibitions of cadmium and zinc-mediated ROS production were obtained with the flavoprotein inhibitors—diphenylene iodonium (DPI) and quinacrine and with an inhibitor of b-type cytochromes—imidazol. Membrane permeable-N-ethyl maleimide (NEM) and iodoacetate, and membrane non-permeable thiol reagents—para-chloromercuribenzoic acid (pCMBS) also inhibited the ROS production. These results suggested that the enzyme responsible for cadmium and zinc-induced ROS production in tobacco cells contains a flavocytochrome. They also show the importance of intra- and extracellular thiol groups in the observed stress reaction. The induction of ROS production with heavy metals showed properties comparable to the elicitor-induced oxidative burst in other plant cells. |
| Starting Page | 43 |
| Ending Page | 49 |
| Page Count | 7 |
| File Format | |
| ISSN | 01375881 |
| Journal | Acta Physiologiae Plantarum |
| Volume Number | 31 |
| Issue Number | 1 |
| e-ISSN | 18611664 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2008-07-02 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Heavy metals Nicotiana tabacum Bright Yellow 2 Oxidative burst Oxidative stress Reactive oxygen species Agriculture Plant Anatomy/Development Plant Pathology Plant Biochemistry Plant Genetics & Genomics Plant Physiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science Agronomy and Crop Science |
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