title: Bacterial endophytes of Trans-Ili Alatau region's plants as promising components of a microbial preparation for agricultural use.
abstract: In this study, 382 isolates of bacterial endophytes from tissues of plants grown in the foothills and piedmont plains of the Trans-Ili Alatau were isolated. It was found that certain strains actively produce indole-3-acetic acid (IAA) in a medium containing l-tryptophan. Among the strains studied, 26 strains (66%) showed a positive response to production of IAA. Bacteria synthesized IAA in the range of 18.6 ± 1.1 to 82.4 ± 2.3 µg/ml. IAA was synthesized more actively by Streptosporangium sp. KK1 (44.1 µg/ml), Rhodococcus sp. KK 2 (42.5 µg/ml), Streptomyces tendae KK3 (44.9 µg/ml) strains. The most active auxin's producer is a Jeotgalicoccus halotolerans BAK1 strain, whose total level of IAA production reached 82.4 µg/ml. Such strains as Streptomyces griseorubiginosis KK4, Streptomyces sp. KK5 and Jeotgalicoccus halotolerans BAK1 were found to have a significant stimulating effect which was reflected in the increase of the length of the roots of soybean and barley. As a result, 8 promising strains with fungicidal, growth-stimulating, phosphorus dissolving and enzymatic activities were selected for the further development of highly microbiological preparations for crop research.
authors.affiliation: Faculty of Biology and Biotechnology, al-Farabi Kazakh National University, Almaty, Kazakhstan.
authors.forename: Togzhan
authors.initials: T
authors.lastname: Mukasheva
authors.affiliation: Faculty of Biology and Biotechnology, al-Farabi Kazakh National University, Almaty, Kazakhstan.
authors.forename: Ramza
authors.initials: R
authors.lastname: Berzhanova
authors.affiliation: Faculty of Biology and Biotechnology, al-Farabi Kazakh National University, Almaty, Kazakhstan.
authors.forename: Lyudmila
authors.initials: L
authors.lastname: Ignatova
authors.affiliation: Faculty of Biology and Biotechnology, al-Farabi Kazakh National University, Almaty, Kazakhstan.
authors.forename: Anel
authors.initials: A
authors.lastname: Omirbekova
authors.affiliation: Research Institute of Biology and Biotechnology Problems, Almaty, Kazakhstan.
authors.forename: Yelena
authors.initials: Y
authors.lastname: Brazhnikova
authors.affiliation: Faculty of Biology and Biotechnology, al-Farabi Kazakh National University, Almaty, Kazakhstan.
authors.forename: Raikhan
authors.initials: R
authors.lastname: Sydykbekova
authors.affiliation: Faculty of Biology and Biotechnology, al-Farabi Kazakh National University, Almaty, Kazakhstan.
authors.forename: Maya
authors.initials: M
authors.lastname: Shigaeva
mesh_terms: D000383:Agriculture; D018556:Crops, Agricultural / Q000254:growth & development / Q000382:microbiology; D060026:Endophytes / Q000302:isolation & purification / Q000378:metabolism*; D001467:Hordeum / Q000254:growth & development* / Q000382:microbiology; D007210:Indoleacetic Acids / Q000378:metabolism; D007623:Kazakhstan; D010937:Plant Growth Regulators / Q000096:biosynthesis*; D018517:Plant Roots / Q000254:growth & development / Q000382:microbiology; D013025:Glycine max / Q000254:growth & development* / Q000382:microbiology; D013302:Streptomyces / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; C030737:indoleacetic acid