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<p>The expression of genes coding for stress proteins in plants, plays a very important role in the enhancement of tolerance, resistance and efficiency of defense system in plants under various types of stress (biotic or abiotic) especially the antioxidant system. The aim of our work was to study and evaluate the effect of chromium (VI) on the expression of some stress genes such as <i>Hsp70.1</i> (Heat-shock-proteins), <i>MT2</i> (Metallothionein-2), <i>GR1</i> (Glutathione-reductase), <i>Cu-ZnSOD</i> (Superoxide-dismutase) and <i>Cat</i> (Catalase), in the roots of <i>Vicia faba</i> L. The results shown that chromium (VI) negatively affects <i>Vicia faba</i> L. root growth by reducing length and fresh biomass. On the other hand, it induces the overproduction of H<sub>2</sub>O<sub>2</sub>, MDA and stimulates the expression of stress-related genes. However, we noticed that the accumulation of <i>Cat, GR,</i> and <i>Cu ZnSOD</i> transcripts was maximal for a short duration of exposure, but after 24&#xa0;h the accumulation starts to decrease, it is assumed that there is a threshold where the accumulation can be maximal (low chromium (VI) dose and short duration of exposure).</p>

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The effect of chromium (VI) on stress related genes expression in the roots of Vicia faba L

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Mohammed Bouhadi,
  • Ayoub El Abbassi,
  • Houda El Hajjouji,
  • M’hammed El Kouali,
  • Mohammed Talbi,
  • Hassan Fougrach

摘要

The expression of genes coding for stress proteins in plants, plays a very important role in the enhancement of tolerance, resistance and efficiency of defense system in plants under various types of stress (biotic or abiotic) especially the antioxidant system. The aim of our work was to study and evaluate the effect of chromium (VI) on the expression of some stress genes such as Hsp70.1 (Heat-shock-proteins), MT2 (Metallothionein-2), GR1 (Glutathione-reductase), Cu-ZnSOD (Superoxide-dismutase) and Cat (Catalase), in the roots of Vicia faba L. The results shown that chromium (VI) negatively affects Vicia faba L. root growth by reducing length and fresh biomass. On the other hand, it induces the overproduction of H2O2, MDA and stimulates the expression of stress-related genes. However, we noticed that the accumulation of Cat, GR, and Cu ZnSOD transcripts was maximal for a short duration of exposure, but after 24 h the accumulation starts to decrease, it is assumed that there is a threshold where the accumulation can be maximal (low chromium (VI) dose and short duration of exposure).