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Asian Journal of Biological Sciences
  Year: 2019 | Volume: 12 | Issue: 4 | Page No.: 637-647
DOI: 10.3923/ajbs.2019.637.647
 
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Histological and Ultrastructure Alterations in the Midgut of Blaps polycresta and Trachyderma hispida (Coleoptera: Tenebrionidae) Induced by Heavy Metals Pollution
Dalia Abdel Moneim Kheirallah and Lamia Mostafa El- Samad

Abstract:
Background and Objective: The present research focused on using two coleopteran insects Blaps polycresta and Trachyderma hispida as bioindicators for heavy metals pollution that resulted from ceramic industry in an urban area, Khorshed district, Alexandria, Egypt. Materials and Methods: Bioaccumulation of the heavy metals was quantified in the soil and midgut tissues of the two insects by using x-ray microprobe analysis. Histological and ultrastructure preparations were performed at the Electron Microscope Unit at Faculty of Science, Alexandria University, Egypt. Results: The x-ray analysis revealed high metal percentage in the soil and midgut tissues of the insects collected from the polluted site compared to the reference site (the garden of Faculty of Science, Alexandria University, Egypt). Histological and ultrastructure alterations were observed in the midgut cells of the two insects collected from the polluted site compared to the reference site. The most observed histological alteration was the distortion of the brush borders of the microvilli. Ultrastructure alterations included: Nuclear distortion of regenerative and digestive cells, lysis of the mitochondrial matrices, the appearance of electron-dense vesicles, the presence of myelin figures, vacuolated cytoplasm and dilation of the rough and smooth endoplasmic reticulum. Conclusion: The study validates that heavy metals pollution leads to cellular and sub-cellular alterations in insects inhabiting industrial districts.
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How to cite this article:

Dalia Abdel Moneim Kheirallah and Lamia Mostafa El- Samad, 2019. Histological and Ultrastructure Alterations in the Midgut of Blaps polycresta and Trachyderma hispida (Coleoptera: Tenebrionidae) Induced by Heavy Metals Pollution. Asian Journal of Biological Sciences, 12: 637-647.

DOI: 10.3923/ajbs.2019.637.647

URL: https://scialert.net/abstract/?doi=ajbs.2019.637.647

 
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