title: High incidence of plant growth-stimulating bacteria associated with the rhizosphere of wheat grown on salinated soil in Uzbekistan.
abstract: Soil salinization is increasing steadily in many parts of the world and causes major problems for plant productivity. Under these stress conditions, root-associated beneficial bacteria can help improve plant growth and nutrition. In this study, salt-tolerant bacteria from the rhizosphere of Uzbek wheat with potentially beneficial traits were isolated and characterized. Eight strains which initially positively affect the growth of wheat plants in vitro were investigated in detail. All eight strains are salt tolerant and have some of the following plant growth-beneficial properties: production of auxin, HCN, lipase or protease and wheat growth promotion. Using sequencing of part of the 16S rDNA, the eight new isolates were identified as Acinetobacter (two strains), Pseudomonas aeruginosa, Staphylococcus saprophyticus, Bacillus cereus, Enterobacter hormaechei, Pantoae agglomerans and Alcaligenes faecalis. All these strains are potential human pathogens. Possible reasons for why these bacteria present in the rhizosphere and establish there are discussed.
authors.affiliation: Tashkent State University of Agriculture, University str.1, 700140 Tashkent, Uzbekistan. dilfuza_egamberdiyeva@yahoo.com
authors.forename: Dilfuza
authors.initials: D
authors.lastname: Egamberdieva
authors.forename: Faina
authors.initials: F
authors.lastname: Kamilova
authors.forename: Shamil
authors.initials: S
authors.lastname: Validov
authors.forename: Laziza
authors.initials: L
authors.lastname: Gafurova
authors.forename: Zulfiya
authors.initials: Z
authors.lastname: Kucharova
authors.forename: Ben
authors.initials: B
authors.lastname: Lugtenberg
mesh_terms: D001419:Bacteria / Q000254:growth & development / Q000302:isolation & purification*; D018556:Crops, Agricultural / Q000254:growth & development / Q000382:microbiology; D007210:Indoleacetic Acids / Q000737:chemistry / Q000302:isolation & purification; D010937:Plant Growth Regulators / Q000302:isolation & purification / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D054712:Salinity; D012987:Soil; D012988:Soil Microbiology; D014908:Triticum / Q000254:growth & development / Q000378:metabolism / Q000382:microbiology*; D014610:Uzbekistan
chemical_list: D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D012336:RNA, Ribosomal, 16S; D012987:Soil