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Effect of lanthanum ions (La3+) on the reactive oxygen species scavenging enzymes in wheat leaves

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Abstract

Physiological effects of lanthanum ions on the activities of the enzymes in the reactive oxygen species (ROS) scavenging system in leaves of wheat (Triticum aestivum L.) seedlings were studied. Wheat leaves treated in Hogland solution with 0.1 mM LaCl3 for 48 h showed increased levels of superoxide dismutase (SOD), catalase (CAT), ascorbate-specific peroxidase (AsA-POD), and dehydroascorbate reductase (DHAR). However, a minor effect was observed on the levels of monodehydroascorbate reductase (MDAR) and glutathione reductase (GR), which regulate the release of energy required by the ROS scavenging system. The whole system was linked up by H+ transmission. Our results indicated that the activities of the enzymes that function directly to remove ROS were elevated by La3+ treatment, which is consistent with the observations that La3+-treated plants had increased tolerance to environmental stresses. The remaining levels of MDAR and GR suggested that these two enzymes might be regulated differently from that of the other four enzymes studied.

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Authors and Affiliations

  1. School of Life Science, Lanzhou University, 730000, Lanzhou, China

    Lijing Zhang, Fuli Zeng & Rong Xiao

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  1. Lijing Zhang
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  2. Fuli Zeng
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  3. Rong Xiao
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Zhang, L., Zeng, F. & Xiao, R. Effect of lanthanum ions (La3+) on the reactive oxygen species scavenging enzymes in wheat leaves. Biol Trace Elem Res 91, 243–252 (2003). https://doi.org/10.1385/BTER:91:3:243

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  • DOI: https://doi.org/10.1385/BTER:91:3:243

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