title: Genetic and functional heterogeneities among fluorescent Pseudomonas isolated from environmental samples.
abstract: Fluorescent Pseudomonas from diverse environmental samples including wastes were identified and screened for the solubilization of tricalcium phosphate, indole-3-acetic acid (IAA), production and inhibition of extracellular N-acylhomoserine lactone (AHLs) and characterized for their siderophores. Genotypic analysis by amplified rDNA restriction analysis (ARDRA) and BOX-A1R-based repetitive extragenic palindromic-PCR (BOX-PCR) typing resulted respectively in 14 ARDRA types and 24 different BOX-types with diverse incidence among the analyzed strains. Based on 16S rRNA sequence analysis the isolates were assigned to P. aeruginosa, P. otitidis, P. plecoglossicida, P. mosselii, P. monteilii, P. koreensis, P. taiwanenesis, P. frederiksbergensis and P. graminis. Of the 66 isolates, 56 (84.85%) isolates solubilized tri-calcium phosphate (TCP), 53 (80.30%) isolates produced plant growth hormone IAA, 62 (94%) produced bacteriocin and 34 (52%) isolates produced extracellular N-acylhomoserine lactone while 30 (45%) isolates were able to interfere with N-acylhomoserine lactone. Isolates were clustered into 17 siderotypes and (59)Fe cross-incorporation experiments permitted assignment of all siderotypes but two into well-defined siderovars.
authors: Laboratoire Microorganismes et Biomolécules actives Faculté des Sciences de Tunis, Campus Universitaire, Tunisia.
authors: Inès
authors: I
authors: Mehri
authors: Yousra
authors: Y
authors: Turki
authors: Mohamed
authors: M
authors: Chair
authors: Hanène
authors: H
authors: Chérif
authors: Abdennasser
authors: A
authors: Hassen
authors: Jean-Marie
authors: JM
authors: Meyer
authors: Maher
authors: M
authors: Gtari