title: Influence of plant growth promoting bacteria and its mutant on heavy metal toxicity in Brassica juncea grown in fly ash amended soil.
abstract: In this study a metal tolerant plant growth promoting bacteria, NBRI K28 Enterobacter sp. was isolated from fly ash (FA) contaminated soils. The strain NBRI K28 and its siderophore overproducing mutant NBRI K28 SD1 were found capable of stimulating plant biomass and enhance phytoextraction of metals (Ni, Zn and Cr) from FA by metal accumulating plant i.e. Brassica juncea (Indian mustard). Concurrent production of siderophores, Indole acetic acid (IAA) and phosphate solubilization revealed its plant growth promotion potential. The strain also exhibited 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity. In most of the cases mutant of NBRI K28, exerted more pronounced effect on metal accumulation and growth performance of B. juncea plants than wild type.
authors.affiliation: Biomass Biology and Environmental Division, National Botanical Research Institute, Rana Pratap Marg, Lucknow, UP, India. kalpna529@gmail.com <kalpna529@gmail.com>
authors.forename: Kalpna V
authors.initials: KV
authors.lastname: Kumar
authors.forename: N
authors.initials: N
authors.lastname: Singh
authors.forename: H M
authors.initials: HM
authors.lastname: Behl
authors.forename: Shubhi
authors.initials: S
authors.lastname: Srivastava
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D002244:Carbon / Q000032:analysis / Q000494:pharmacology*; D060729:Coal Ash; D004754:Enterobacter / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism / Q000502:physiology*; D019216:Metals, Heavy / Q000378:metabolism / Q000633:toxicity*; D009149:Mustard Plant / Q000187:drug effects* / Q000254:growth & development* / Q000378:metabolism; D009154:Mutation; D052638:Particulate Matter / Q000032:analysis / Q000494:pharmacology*; D017262:Siderophores / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis / Q000494:pharmacology
chemical_list: D060729:Coal Ash; D019216:Metals, Heavy; D052638:Particulate Matter; D017262:Siderophores; D012989:Soil Pollutants; D002244:Carbon