Вклад секретируемых фосфатаз в мобилизацию почвенных фосфатов штаммами Pantoea brenneri

Abstract

Bacteria of the Pantoea genus have a positive effect on the growth and development of plants. In the genome of the P. brenneri strain3.5.2 we identified genes and genetic clusters associated with their multiple PGP-properties, previously confirmed by biochemical and microbiological methods. The strains are capable of hydrolyzing soil phytates and are active against inorganic soil phosphates: hydroxyapatite, phosphorite, and tricalcium phosphate. The gcd and pqqE genes responsible for the production of gluconic acid involved in the processes of phosphorus mobilization were identified. When grown on media with various sources of unavailable phosphorus, P. brenneri strains were able to secrete acid and alkaline phosphatases, the activity of which depended on the time of bacterial cultivation and the source of phosphate in the medium.