Golubev Sergey N. RussiaSaratovInstitute of Biochemistry and Physiology of Plants and Microorganisms of the Russian Academy of Sciences, 410049, Russia, Saratov, Entuziastov Avenue, 13sngolubev@rambler.ru Author's articles Rhizosphere Microorganisms’ Collection of IBPPM RAS: Revision of Azospirillum Strains Based on 16S rRNA Gene Sequence Analysis