Kumar Kalpna V, Srivastava Shubhi, Singh N, Behl H M
Biomass Biology & Environmental Division, National Botanical Research Institute, Rana Pratap Marg, Lucknow, UP, India.
J Hazard Mater. 2009 Oct 15;170(1):51-7. doi: 10.1016/j.jhazmat.2009.04.132. Epub 2009 May 9.
In this study, we have shown that the plant growth promoting bacterial strain NBRI K24 and strain NBRI K3 from fly ash (FA) contaminated soil reduce the toxicity of Ni and Cr in Brassica juncea (Indian mustard) and promote plant growth under pot culture experiments. Isolated strains NBRI K24 and NBRI K3 were characterized based on the 16S rDNA sequencing and identified as Enterobacter aerogenes and Rahnella aquatilis respectively. Both the strains were siderophore producing and found capable of stimulating plant biomass and enhance phytoextraction of metals (Ni and Cr) from FA by metal accumulating plant i.e. B. juncea. Concurrent production of siderophores, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, indole acetic acid (IAA) and phosphate solubilization revealed their plant growth promotion potential.
在本研究中，我们已表明，从粉煤灰（FA）污染土壤中分离出的促进植物生长的细菌菌株NBRI K24和菌株NBRI K3，在盆栽实验中可降低印度芥菜中镍和铬的毒性，并促进植物生长。基于16S rDNA测序对分离出的菌株NBRI K24和NBRI K3进行了表征，分别鉴定为产气肠杆菌和水生拉恩菌。这两种菌株都能产生铁载体，并且发现能够刺激植物生物量增长，并增强金属积累植物即印度芥菜对粉煤灰中金属（镍和铬）的植物提取。同时产生铁载体、1-氨基环丙烷-1-羧酸（ACC）脱氨酶、吲哚乙酸（IAA）和溶解磷酸盐，揭示了它们促进植物生长的潜力。
