Exposure of Arabidopsis thaliana to Cd or Cu excess leads to oxidative stress mediated alterations in MAPKinase transcript levels

Opdenakker, Kelly; Remans, Tony; Keunen, Els; Vangronsveld, Jaco; Cuypers, Ann

doi:10.1016/j.envexpbot.2012.04.003

Cited by 123 publications

(80 citation statements)

References 56 publications

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“…The plant plasma membrane is considered to be the first living structure affected by cadmium toxicity (Gallego et al, 2012). Exposure to cadmium generates various reactive oxygen species (ROS) in plant cells, including H 2 O 2 , usually metabolized into water and oxygen in the presence of catalase (Zhang et al, 2009 ), induce lipid peroxidation of cell membranes, and eventually lead to irreversible membrane damage (Opdenakker et al, 2012). Cadmium exerts its toxicity through membrane damage and inactivation of enzymes (Shah, 2011).…”

Section: Discussionmentioning

confidence: 99%

Cadmium localization and its toxic effects on root tips of barley

Shi

Wang

Zou

et al. 2016

Zemdirbyste-Agriculture

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Toxic effects of different cadmium (Cd) concentrations on root tip cells of barley (Hordeum vulgare L.) for 1, 4, 12, 24, 48 and 72 h were investigated in order to better understand the mechanisms both in metal toxicity and tolerance. The results indicated that the roots were the main sites of cadmium uptakes. Cadmium ions initially entered elongation zone cells and were accumulated in this area. Then, the cadmium extends up to mature zone and down to meristem zone gradually. The degree of the cell damage in the root tips was associated with the amounts of cadmium absorption and accumulation. After cadmium ions entered meristem zone, cadmium disturbed the mechanisms controlling the organization of microtubule (MT) cytoskeleton and tubulin assembly/disassembly processes. The formation of abnormal MT arrays was formed, including discontinuous wavy MTs and short MT fragments at the cell periphery. The toxic effects resulted in a decrease of mitotic index and inducement of abnormal mitosis, inducing aberrant chromosomes, such as C-mitosis, anaphase bridges and chromosome stickiness. Therefore, MT cytoskeleton can be thought to be one of target sites of cadmium toxicity in root tip cells of plants. The direct cellular evidence of cadmium toxic effects on root tips of barley obtained here is valuable in evaluation of mechanisms both in metal toxicity and tolerance.

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Section: Discussionmentioning

confidence: 99%

Cadmium localization and its toxic effects on root tips of barley

Shi

Wang

Zou

et al. 2016

Zemdirbyste-Agriculture

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“…Their resistance was associated with the maintenance of greater antioxidant enzyme activities (Merewitz et al 2011). As the metal specific regulation of pro-oxidative and antioxidative genes was described (Opdenakker et al 2012), we suppose that these plants are also more resistant against premature senescence induced by altered levels of risk elements. Our hypothesis is that they…”

mentioning

confidence: 86%

The effect of risk elements in soil to nitric oxide metabolism in tobacco plants

Procházková¹,

Haisel²,

Pavlı́ková³

et al. 2012

PLANT SOIL ENVIRON

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We studied changes of endogenous nitric oxide content (NO) and of reactive nitrogen species metabolism in transgenic tobacco with prolonged life span (SAG) and in wild tobacco (WT) cultivated in the control and in the polluted soil. There was no difference in the metal accumulation between WT and SAG plants however SAG ones showed better ability to cope with risk elements, as they retained higher membrane stability index and chlorophyll content together with better photochemical efficiency and lower deepoxidation status. Risk elements induced higher NO production in the youngest leaves of both plant types. Low and middle leaves of both WT and SAG plants showed similar activities of nitrate reductase and nitrosoglutathione reductase. Increase of nitrotyrosine content in leaf soluble proteins suggests that risk elements induced nitrosative stress in both plant types.

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“…Increasing concentration of Fe (40, 80, and 160 mM) enhanced lipid peroxidation in Bacopa monnieri (Sinha and Basant 2009). Similarly, elevation in lipid peroxidation in a number of plants due to their exposure to Cu (Posmyk et al 2009;Opdenakker et al 2012;Singh et al 2012;Thounaojam et al 2012;Elleuch et al 2013;Ansari et al 2013a), Ni (Kazemi et al 2010;Gajewska et al 2012), Se (Malik et al 2012), As (Ansari et al 2013b), Pb (Qureshi et al 2007;Maldonado-Magaña et al 2011), Cr (Diwan et al 2008;2010), and some other heavy metals/metalloids was reported to be dependent on their doses and plant types (Sytar et al 2013). The main site of attack by any redox active metal in a plant cell is usually the cell membrane.…”

Section: Metals/metalloidsmentioning

confidence: 97%

Lipids and proteins—major targets of oxidative modifications in abiotic stressed plants

Anjum

Sofo

Scopa

et al. 2014

Environ Sci Pollut Res

275

160

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Stress factors provoke enhanced production of reactive oxygen species (ROS) in plants. ROS that escape antioxidant-mediated scavenging/detoxification react with biomolecules such as cellular lipids and proteins and cause irreversible damage to the structure of these molecules, initiate their oxidation, and subsequently inactivate key cellular functions. The lipid- and protein-oxidation products are considered as the significant oxidative stress biomarkers in stressed plants. Also, there exists an abundance of information on the abiotic stress-mediated elevations in the generation of ROS, and the modulation of lipid and protein oxidation in abiotic stressed plants. However, the available literature reflects a wide information gap on the mechanisms underlying lipid- and protein-oxidation processes, major techniques for the determination of lipid- and protein-oxidation products, and on critical cross-talks among these aspects. Based on recent reports, this article (a) introduces ROS and highlights their relationship with abiotic stress-caused consequences in crop plants, (b) examines critically the various physiological/biochemical aspects of oxidative damage to lipids (membrane lipids) and proteins in stressed crop plants, (c) summarizes the principles of current technologies used to evaluate the extent of lipid and protein oxidation, (d) synthesizes major outcomes of studies on lipid and protein oxidation in plants under abiotic stress, and finally, (e) considers a brief cross-talk on the ROS-accrued lipid and protein oxidation, pointing to the aspects unexplored so far.

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Exposure of Arabidopsis thaliana to Cd or Cu excess leads to oxidative stress mediated alterations in MAPKinase transcript levels

Cited by 123 publications

References 56 publications

Cadmium localization and its toxic effects on root tips of barley

Cadmium localization and its toxic effects on root tips of barley

The effect of risk elements in soil to nitric oxide metabolism in tobacco plants

Lipids and proteins—major targets of oxidative modifications in abiotic stressed plants

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