Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Inde → 2014 → Monitoring of Agricultural Soils of Amritsar for their Genotoxicity and Effect on Antioxidative Defense System in Allium cepa L

Guru Nanak Dev University (2014)

Monitoring of Agricultural Soils of Amritsar for their Genotoxicity and Effect on Antioxidative Defense System in Allium cepa L

Soodan, Ranjeet Kour

Titre : Monitoring of Agricultural Soils of Amritsar for their Genotoxicity and Effect on Antioxidative Defense System in Allium cepa L

Auteur : Soodan, Ranjeet Kour

Université de soutenance : Guru Nanak Dev University

Grade : Doctor of Philosophy (PhD) 2014

Résumé
Presently in India, ongoing rigorous agricultural practices are pulling out the essential nutrients particularly from fields under rice and wheat cultivation. The district Amritsar of Punjab (India), an agricultural land, is under intensive cultivation of wheat, rice and vegetable crops. In order to have high yield, vast varieties of organic and inorganic pesticides as well as fertilizers containing different heavy metals, are being used by farmers which ultimately result in soil and water pollution. Apart from this, the direct application of sewage sludge, industrial effluents and waste to agricultural lands as source of plant nutrients also aroused serious concern as they contain many toxic metals along with useful nutrient elements.
Keeping this in mind, the present study was planned to analyze agricultural soil samples of Amritsar under rice and wheat cultivation for various physico-chemical parameters including heavy metals viz. copper (Cu), cadmium (Cd), chromium (Cr), iron (Fe), manganese (Mn), nickel (Ni), lead (Pb) and zinc (Zn). The study also involved evaluation of genotoxic potential in terms of chromosomal abnormalities induced by collected soil samples using Allium cepa root chromosomal aberration assay following in situ and root dip modes of treatment. The study also comprised the estimation of total protein content and responses of certain antioxidative/ detoxification enzymes viz. ascorbate peroxidase (APX), catalase (CAT), dehydroascorbate reductase (DHAR), glutathione reductase (GR), glutathione-S-transferase (GST), guaicol peroxidase (POD) and superoxide dismutase (SOD), in Allium cepa bulbs upon exposure to such soils
An extensive survey of different regions of Amritsar was made after dividing it into four equal zones viz. North East (NE), North West (NW), South East (SE) and South West (SW). Agricultural soil samples were collected from fields under rice cultivation during September, 2009 (r1) and September, 2010 (r2) and wheat cultivation during March, 2010 (w1) and March, 2011(w2). Two agricultural fields (FI and FII) from each zone were selected for further investigations.

Présentation et version intégrale (Shodhganga)

Page publiée le 26 février 2021