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Effects of exogenous nitric oxide on the antioxidant capacity of cadmium-treated soybean cell suspension

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Abstract

Nitric oxide (NO) is a small, ubiquitous molecule, whose physiological function in plants has recently been widely investigated. It seems that one of its pivotal properties is the antioxidant capacity, enabling plants to alleviate the effects of the oxidized stress. In this work we investigated the role of NO in soybean (Glycine max L. Cv. Navico) cell suspension treated with cadmium. Sodium nitroprusside (SNP), nitric oxide donor, markedly decreased the negative influence of Cd2+ on cell growth. It was also found to stimulate superoxide dismutase (SOD, EC 1.15.1.1). Using specific fluorochromes — dihydroethidine (DHE) and 2′,7′- dichlorofluorescein (DCFH-DA) it was shown that NO was very effective in reducing the level of superoxide anion (O ·−2 ) and hydrogen peroxide, respectively. Furthermore, as evaluated by means of NO specific fluorochrome 4,5-diaminofluorescein diacetate (DAF-2DA), increased production of NO was found in Cd-treated cells. In cadmium-stressed cells SNP lowered the level of oxidized proteins.

Our results suggest that the antioxidant properties of nitric oxide in Cd-treated soybean cells rely mainly on its ability to direct scavenging of ROS and stimulation of the antioxidant system.

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Authors and Affiliations

  1. Laboratory of Plant Ecophysiology, Adam Mickiewicz University, AI, Niepodległości 14, 61-713, Poznań, Poland

    Małgorzata Kopyra, Magdalena Stachoń-Wilk & Edward A. Gwóźdź

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  1. Małgorzata Kopyra
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  2. Magdalena Stachoń-Wilk
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  3. Edward A. Gwóźdź
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Correspondence to Edward A. Gwóźdź.

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Kopyra, M., Stachoń-Wilk, M. & Gwóźdź, E.A. Effects of exogenous nitric oxide on the antioxidant capacity of cadmium-treated soybean cell suspension. Acta Physiol Plant 28, 525–536 (2006). https://doi.org/10.1007/s11738-006-0048-4

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  • DOI: https://doi.org/10.1007/s11738-006-0048-4

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