Paper Details

Effects of lead and growth-promoting bacteria on auxin, gibberellin,  cytokinin  and  abscisic  acid in barley (Hordeum vulgare L.)

Davood Habibi

DOI: https://dx.doi.org/10.12692/ijb/4.8.14-22

Int. J. Biosci. 4(8), 14-22. April, 2014. (PDF)

Abstract:

Contamination of soil by Pb is a major problem in industrialized and developing countries. Phytoremediation is a simple and inexpensive method to reduce the environment Contamination. The effects of five levels of PGPB (control, azosperillium, azotobacter, pseudomonas and azotobacter+ azospirillium+ pseudomonas) and four levels of lead (0, 250, 500, 750 mg kg-1 of soil) were studied on chl.a, chl.b, chl.a + b auxin, gibberellin, cytokinin and abscisic acid contetns in barley (Hordeum vulgare L). Experiment was carried as a factorial based on completely randomized design with four replications. The results indicated that chl.a, chl.b, chl.a + b auxin, gibberellin, cytokinin and abscisic acid contents were significantly affected by Pb and PGPB. Contens of chl.a, chl.b, chl.a + b auxin, gibberellin, cytokinin and abscisic acid were decreased by increasing Pb concentrations and enhanced by inoculation with PGPB. Significant contents of Pb accumulated in roots and shoot of barley. The present study revealed that barley appears to have great potential for cleaning Pb-contaminated soils