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TOLERANCE OF ALBIZIA LEBBECK (L) BENTH TO DIFFERENT LEVELS OF LEAD IN NATURAL FIELD CONDITIONS

ZIA-UR-REHMAN FAROOQI, MUHAMMAD ZAFAR IQBAL, MUHAMMAD KABIR AND MUHAMMAD SHAFIQ

Abstract: Lead produced significant effects on different growth parameters of Albizia lebbeck (L.) Benth such as root, shoot, seedling length, leaf area, plant circumference and seedling dry biomass in natural field conditions. Seedling growth performance of A. lebbeck showed low level of tolerance with increasing concentrations of lead treatments from 25 to 125µmol/L. Lead treatments at 25 to 125µmol/L produced significant effect on shoot, root and seedling length of A. lebbeck. Number of leaves, leaf area and circumference were significantly (p<0.05) reduced at all concentrations of lead treatments. Seedling dry biomass was significantly reduced at 100 and 125µmol/L treatment of lead. Lead treatment at 25µmol/L showed high percentage of tolerance indices while by increasing lead levels to 125µmol/L, percentage of tolerance indices was low.

Department of Botany, University of Karachi, Karachi, 75270, Pakistan.

E-mail: farooqi_bot@yahoo.com; shafiqeco@yahoo.com