Growth stimulating and phosphorus-mobilizing activity of wheat rhizobacteria (triticum aestivum l.) of the genus pseudomonas and bacillus
Abstract
From the rhizosphere of wheat varieties "Dustlik" and "Grom" cultivated in the Syrdarya region of Uzbekistan, active growth-stimulating and phosphorus mobilizing rhizobacteria of the following species have been isolated and identified: Pseudomonas aeruginosa S10, Bacillus pumilus S16, Bacillus cereus S19 and Bacillus subtilis S27. Effective cultures of P. aeruginosa S10, B. pumilus S16, B. cereus S19 and B. subtilis S27 stimulate the growth and development of ground organs of wheat varieties "Chillaki" and "Unumdor bugdoy" by 12.9; 19.3; 28.1; 51.7% and 12.1; 18.1; 12.1; 18.1%, respectively. Among the selected effective rhizobacteria of wheat on the first day of incubation, P. aeruginosa S10 was the most active in acid production, acid production of which was 92%, and on the 3rd day - 100%. During cultivation, starting from the 2nd day of the experiment, P. aeruginosa S10 mobilizes up to 1.2 ± 0.03 mg P2O5 / 100 ml from Ca3(PO4)2, the culture shows the most active mobilization of P2O5 / 100 ml from Ca3(PO4)2 at 4 day of cultivation - 23.0 ± 0.19 mg P2O5 / 100 ml from Ca3(PO4)2.