Study of Sunflower Plant Response to Cadmium and Lead Toxicity by Usage of PGPR in a Calcareous Soil

آب و خاک

Article 12, Volume 25, Issue 5, November 2011   

Document Type: Research Article

DOI: 10.22067/jsw.v0i--.11218

Authors

B. Motesharezadeh^* ; Gh.R. Savaghebi

Department of Soil Science, Agriculture and Natural Resources (Karaj), University of Tehran

Abstract

Abstract
Nowadays, soil pollution with heavy metals has become a major problem which their accumulation in plants can directly or indirectly influence on animals and humans life. Lead and cadmium are poisonous metals, with increasing the amount of these metals in environmental pollution; they will be increased in food chain significantly. In this research, three levels of cadmium (0, 100 and 200 mg/kg), three levels of lead (0, 200 and 400 mg/kg) and three levels of native resistance bacteria inoculants (B0: Control, B1: Bacillus mycoides and B2: Bacillus circulans ) were examined as a factorial experiment with randomized complete block design (RCBD) in three replications. Then sunflower responses to cadmium and lead toxicity including: heavy metal and micronutrients concentration and their uptakes and finally dry matter weight of sunflower were evaluated in greenhouse condition. Results showed that with increasing cadmium and lead concentration in soil, concentration of these elements in plant root and shoot increased significantly (P