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首页> 外文期刊>Journal of Basic Microbiology: An International Journal on Morphology, Physiology, Genetics, and Ecology of Microorganisms >Characterization of arsenic resistant plant‐growth promoting indigenous soil bacteria isolated from Center‐East regions of India
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Characterization of arsenic resistant plant‐growth promoting indigenous soil bacteria isolated from Center‐East regions of India

机译：抗砷植物生长促进印度中东地区土着土壤菌株的抗性植物生长的特征

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Abstract A total of 45 morphologically distinct arsenic (As)‐resistant bacterial strains were isolated from the soils of different regions of Chhattisgarh, India. The minimum inhibitory concentration (MIC) values of these isolates varied widely in the range of 100‐500?mM for arsenate [As(V)] and 15‐30?mM for arsenite [As(III)]. Out of forty‐five, three isolates viz; ARP3, ARRP3, and ADT5 also revealed plant growth‐promoting properties, including phosphate solubilization and production of siderophores, indoleacetic acid, ammonia, and exopolysaccharide. Besides all these, the strains not only exhibited significant growth in the presence of As(V)/As(III) but also displayed higher efficiency (87%‐94%) of As removal from the growth medium followed by intracellular accumulation (17‐19?mg?As/g). Hydride generation atomic absorption spectroscopic (HG‐AAS) analysis revealed the intracellular accumulation of As, and the structural changes that took?place in these isolates were?further confirmed by microscopic studies. The 16?S rRNA and phylogenetic analyses unveiled that the isolates ARP3, ARRP3, and ADT5 belonged to genera Pseudomonas, Exiguobaterium , and Microbacterium , respectively. The conducted study suggested that such beneficial bacterial strains could be conveniently exploited at a commercial level for enhancing plant growth in As‐contaminated agricultural fields, thereby improved productivity and enhanced bioremediation of soil having alarming strength of As.
机译：摘要总共45个形态学上独异的砷（AS） - 从印度Chhattisgarh的不同地区的土壤中分离出来的细菌菌株。这些分离株的最小抑制浓度（MIC）值在100-500Ωmm的范围内变化，用于砷酸盐[AS（v）]和15-30μm的砷酸盐[AS（iii）]。四十五分出口，三个隔离差别; ARP3，ARP3和ADT5还透露了植物生长促进性质，包括磷酸盐溶解和生产的散发粒细胞，吲哚乙酸，氨和外偶联。除了所有这些外，菌株不仅在存在（V）/ AS（III）的情况下表现出显着的增长，而且还显示出从生长培养基中除去的更高效率（87％-94％），然后显示细胞内积聚（17- 19？mg？AS / g）。氢化物产生原子吸收光谱（Hg-AAS）分析显示出的细胞内积累和所花款的结构变化？进一步通过微观研究证实。 16？S rRNA和系统发育分析揭开了分离物ARP3，ARRP3和ADT5分别属于属Pseudomonas，exiguoboSium和微杆菌。进行的研究表明，这种有益的细菌菌株可以在商业水平方便地利用以增强污染的农业领域的植物生长，从而提高生产率和增强土壤的生物修复，其土壤具有惊人的强度。

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