Characterization of metal-resistant plant-growth promoting Bacillus weihenstephanensis isolated from serpentine soil in Portugal
作者： Mani Rajkumar , Ying Ma , Helena Freitas
关键词: Shoot 、 Biology 、 Helianthus annuus 、 Soil contamination 、 Serpentine soil 、 Strain (chemistry) 、 Botany 、 Horticulture 、 Zinc 、 Bacillus weihenstephanensis 、 Phosphate
摘要: A metal-resistant bacterial strain SM3 isolated from a serpentine soil in the north-east of Portugal was characterized as Bacillus weihenstephanensis based on morphological and biochemical characteristics comparative analysis partial 16S ribosomal DNA sequence. showed high degree resistance to nickel (1500 mg l –1 ), copper (500 ) zinc (700 also antibiotics (ampicillin, penicillin, kanamycin streptomycin). Strain has exhibited capability solubilizing phosphate producing indole-3-acetic acid (IAA) both absence presence metals (Ni, Cu Zn). pot experiment conducted elucidate effects plant growth uptake Ni, or Zn by Helianthus annuus. Inoculation with increased shoot root biomass H. annuus grown non-contaminated contaminated soil. Furthermore, accumulation systems. batch assess metal mobilization potential this concentrations water soluble Metal solubilization may be an important process promote heavy plants. This study elucidates multifarious role promotion its mobilizing potential.
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