Home|Journals|Articles by Year Follow on Twitter

Directory for Medical Articles

Open Access

Original Research

Egypt. J. Exp. Biol. (Bot.). 2016; 12(2): 211-222


Maysa M. Hatata& 1608; Ola A. Sadek.

Heavy metal as Cd can antagonise uptake and transport of other metal elements such as Mn, Zn, and Fe in leaves of Vicia faba L. concentrations of Cd or Zn up to 100 然 remarkably decreased chlorophyll content compared to control. The degradation in Chl. b under such stress was slower than that of Chl. a. and Cd had more inhibitory effect on both pigments than Zn even under low concentration (50 然). The results cleared that Zn can strongly antagonise this toxic effect of Cd especially with high Zn concentrations and where full protection and restoration of chlorophyll levels was recorded. Measurements of Na, Mg, P, K, Ca, Cu, Al, Mn, and Zn bounded to the cell membrane, revealed a significant decrease of Ca, K and Mg in the presence of Cd or Zn, also the disappearance of Fe peak was observed at 100 然 Cd. This could be due to Cd ions interaction with the manganese cluster which is present in the evolving complex on the donor side of PS. The effect of metal toxicity for Zn and or Cd, in this study, could be observed in many damages to the cell organelle ultrastructure. Changes in chloroplast ultrastructure and lipid composition of the thylakoid membranes alter the operability of the photosynthetic electron transport chain. The chloroplast treated with 100 然 Cd has a reduced number of intact grana, as well as reduced chloroplast size. Combined treatment of cadmium and zinc led to more changes in the shape of cellular components, such as, the shape of chloroplasts was almost spherical, the grana were completely damaged and a large part of chloroplast appeared with disturbed envelopes. Increasing Zn over Cd concentration treatment acquired beneficial effect as it can successfully antagonize the harmful effect of Cd.

Key words: Cadmium, Zinc, ultrastructure, photosynthetic apparatus, Vicia faba L.

Similar Articles

Hierarchical ultrastructure: An overview of what is known about tendons and future perspective for tendon engineering.
Zhang S, Ju W, Chen X, Zhao Y, Feng L, Yin Z, Chen X
Bioactive materials. 2022; 8(): 124-139

Aggrecan: Approaches to Study Biophysical and Biomechanical Properties.
Nia HT, Ortiz C, Grodzinsky A
Methods in molecular biology (Clifton, N.J.). 2022; 2303(): 209-226

Metabolic Labeling of Proteoglycans and Analysis of Their Synthesis and Sorting in Filter-Grown and Polarized Epithelial Cells.
Prydz K, Adusumalli R
Methods in molecular biology (Clifton, N.J.). 2022; 2303(): 25-36

Large organellar changes occur during mild heat shock in yeast.
Keuenhof KS, Larsson Berglund L, Malmgren Hill S, Schneider KL, Widlund PO, Nystr繹m T, H繹繹g JL
Journal of cell science. 2022; 135(5):

Publisher Correction: Superradiance of bacteriochlorophyll c aggregates in chlorosomes of green photosynthetic bacteria.
Malina T, Koehorst R, B穩na D, P禳en穩k J, van Amerongen H
Scientific reports. 2021; 11(1): 18739

Full-text options

Latest Statistics about COVID-19
• pubstat.org

Add your Article(s) to Indexes
• citeindex.org

Covid-19 Trends and Statistics
Follow ScopeMed on Twitter
Author Tools
eJPort Journal Hosting
About BiblioMed
License Information
Terms & Conditions
Privacy Policy
Contact Us

The articles in Bibliomed are open access articles licensed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (https://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
ScopeMed is a Database Service for Scientific Publications. Copyright ScopeMed Information Services.

ScopeMed Web Sites