Paper Information

Journal:   IRANIAN INTERNATIONAL JOURNAL OF SCIENCE   Spring 2002 , Volume 3 , Number 1; Page(s) 11 To 22.
 
Paper: 

MORPHOLOGICAL STUDY OF CADMIUM-INDUCED CHANGES ON ROOT APEX OF ALLIUM CEPA MORPHOLOGICAL STUDY OF CADMIUM-INDUCED CHANGES MORPHOLOGICAL STUDY OF CADMIUM-INDUCED CHANGES ON ROOT APEX OF ALLIUM CEPA

 
 
Author(s):  SHAHSAVAN BEHBOUDI B.*, SAMADI L.
 
*  University of Tehran, Tehran, Islamic Repu
 
Abstract: 
Cadmium (Cd) is an industrial and environmental pollutant. It has toxic effects on root tip growth and morphogenesis of onion (Allium cepa L.). Onion roots were germinated in 0, 2, 5, 10, 25, 50, 100, 200 g/ml doses of CdSO4 salt. Then root tips were fixed, dehydrated and paraffin embedded. Afterwards, material was sectioned on a microtom (7m thickness) and stained by Acridine orange fluorescent dye and cytochemical methods for DNA and RNA staining. Results show that Cd induces morphological changes such as cell vacuolization, nucleus and cytoplasm condensation and nucleus margination. It also causes decreases nucleoplasmic ratio and cell death induction. It was also observed that Cd toxicity has a threshold level (10-25mg/ml concentrations). In doses higher than this threshold, cells are  irreversibly committed to death. Therefore in concentrations lower than 25g/ml , the mode of cell death is apoptotic-like cytological features and necrosis happens in higher concentrations.
 
Keyword(s): CADMIUM TOXICITY, ROOT TIP, CELL DEATH, APOPTOSIS, NECROSIS, ALLIUM CEPA
 
References: 
  • ندارد
 
  Yearly Visit 38
 
Latest on Blog
Enter SID Blog