Journal of Microbial & Biochemical Technology

Nitrogen-fixing and phosphate-solubilizing bacteria resistant to technogenic soil salinization

Joint Event on 4^th World Congress and Expo on Applied Microbiology & 2^nd International Conference on Food Microbiology

November 29-December 01, 2017 Madrid, Spain

Aleschenkova Z, Naumovich N and Uladzislau Kuptsou

National Academy of Sciences, Belarus

Posters & Accepted Abstracts: J Microb Biochem Technol

Abstract:

Potash mining region is a vivid example of technogenic soil salinization in Belarus. The daily salt particle precipitation is 100 g/ha (the annual discharges of potash excavation plant constitute approximately 600 t). Since excessive salt levels in soil are toxic for most plants, the use of halotolerant growth-promoting bacteria appears a promising method to withstand deleterious impact of technogenic salinization. Ten bacterial strains resistant up to 12% sodium chloride concentration, distinguished by presence of nif H gene and nitrogenase activity plus 8 bacterial strains capable to transform calcium orthophosphate, forming 5-7 mm halo zones on glucose-asparagine agar and tolerating 15% NaCl levels were isolated from soil sampled around Belaruskali mines. Treatment of Lotus corniculatus seeds by nitrogen-fixing and phosphate-solubilizing bacteria in saline environment stimulated germination rate and increased length of seedlings by 7-20% as compared to the control. Introduction of haloresistant nitrogen-fixing and phosphate-solubilizing bacteria into rhizosphere caused favorable effect on population of agrovaluable microbial species and promoted growth and development of Lotus corniculatus in saline soil. Halotolerant isolates of nitrogen-fixing and phosphate-solubilizing bacteria are potentially attractive agents for application in phytoremediation of soils exposed to technogenic salinization.

Biography :

Camporese A is the Director of Microbiology and Virology Department, Greater Pordenone Area Central Laboratory, in the North East of Italy. He is author of more than 100 scientific papers and more than 200 communications in national and international conferences.