Ponomareva Elena G. RussiaSaratovInstitute of Biochemistry and Physiology of Plants and Microorganisms of the Russian Academy of Sciences, 410049, Russia, Saratov, Entuziastov Avenue, 13petrova_lp@mail.ru Author's articles Analysis of Protease Effect on Biofilm Structure of Azospirillum Brasilense Strain Sp245 and Its Flagellation-Defective mmsB1 and fabG1 Mutants On the Contribution of Cell Aggregation and Extracellular DNA to Biofilm Formation and Stabilization in Azospirillum brasilense Bacteria