Isolation and characterization of Ni mobilizing PGPB from serpentine soils and their potential in promoting plant growth and Ni accumulation by Brassica spp.
作者： Ying Ma , Mani Rajkumar , Helena Freitas
DOI: 10.1016/J.CHEMOSPHERE.2009.01.056
关键词:
摘要: The study was undertaken to assess the effects of Ni mobilizing bacteria on plant growth and uptake by Brassica juncea oxyrrhina. Among a collection resistant bacterial strains isolated from non-rhizosphere rhizosphere soils Alyssum serpyllifolium Astragalus incanus at serpentine site in Braganca, north-east Portugal, nine were selected based their ability solubilize soil. Further assessment growth-promoting parameters revealed intrinsic produce indole-3-acetic acid (IAA), siderophores, utilize 1-aminocyclopropane-1-carboxylic (ACC) as sole N source insoluble phosphate. All tested positive for IAA production phosphate solubilization. In addition, all strains, except SRS5 exhibited significant levels siderophore production. Besides, five isolates showed ACC deaminase activity. pot experiments, inoculation plants with increased biomass both B. Pseudomonas sp. SRI2, Psychrobacter SRS8 Bacillus SN9 maximum increase test plants. strain significantly concentration root shoot tissues Further, correlation observed between mobilization soil total species. findings, therefore, that increases efficiency phytoextraction directly enhancing accumulation indirectly promoting
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