title: Performance and persistence of phosphate solubilizing Azotobacter chroococcum in wheat rhizosphere.
abstract: Survival and establishment of inoculant strains of Azotobacter chroococcum NV 11 and its mutant NV 43 were assessed in sterilized soil and rhizosphere soil of wheat plants at 7 and 15 d interval, respectively, after sowing, i.e., up to 45 d under pot-house conditions. There was an apparent decrease in population of both strains in bulk soil but a steady increase was observed in root zones of the wheat plant. 10(3) to 10(4) introduced bacteria per g root were found sticking to roots. Further studies indicated that inoculant strains of Azotobacter could survive, proliferate and establish well in root zones.
authors.affiliation: Department of Microbiology and Department of Agronomy, Haryana Agricultural University, Hisar 125 004, India.
authors.forename: V
authors.initials: V
authors.lastname: Kumar
authors.forename: N K
authors.initials: NK
authors.lastname: Aggarwal
authors.forename: B P
authors.initials: BP
authors.lastname: Singh
mesh_terms: D001395:Azotobacter / Q000502:physiology*; D010710:Phosphates / Q000378:metabolism; D018517:Plant Roots / Q000382:microbiology; D012988:Soil Microbiology; D013997:Time Factors; D014908:Triticum / Q000382:microbiology*
chemical_list: D010710:Phosphates