title: Brevundimonas diminuta mediated alleviation of arsenic toxicity and plant growth promotion in Oryza sativa L.
abstract: Arsenic (As), a toxic metalloid adversely affects plant growth in polluted areas. In the present study, we investigated the possibility of improving phytostablization of arsenic through application of new isolated strain Brevundimonas diminuta (NBRI012) in rice plant [Oryza sativa (L.) Var. Sarju 52] at two different concentrations [10ppm (low toxic) and 50ppm (high toxic)] of As. The plant growth promoting traits of bacterial strains revealed the inherent ability of siderophores, phosphate solubilisation, indole acetic acid (IAA), 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase production which may be associated with increased biomass, chlorophyll and MDA content of rice and thereby promoting plant growth. The study also revealed the As accumulation property of NBRI012 strain which could play an important role in As removal from contaminated soil. Furthermore, NBRI012 inoculation significantly restored the hampered root epidermal and cortical cell growth of rice plant and root hair elimination. Altogether our study highlights the multifarious role of B. diminuta in mediating stress tolerance and modulating translocation of As in edible part of rice plant.
authors.affiliation: Eco-auditing group, CSIR-National Botanical Research Institute, Lucknow, India. Electronic address: namratas108@gmail.com.
authors.forename: Namrata
authors.initials: N
authors.lastname: Singh
authors.affiliation: Eco-auditing group, CSIR-National Botanical Research Institute, Lucknow, India.
authors.forename: Naina
authors.initials: N
authors.lastname: Marwa
authors.affiliation: Plant Microbe Interaction Division, National Botanical Research Institute, Rana Pratap Marg, Lucknow 226001, UP, India.
authors.forename: Shashank K
authors.initials: SK
authors.lastname: Mishra
authors.affiliation: Plant Molecular Biology and Genetic Engineering Division, National Botanical Research Institute, Rana Pratap Marg, Lucknow 226001, UP, India.
authors.forename: Jyoti
authors.initials: J
authors.lastname: Mishra
authors.affiliation: Plant Molecular Biology and Genetic Engineering Division, National Botanical Research Institute, Rana Pratap Marg, Lucknow 226001, UP, India.
authors.forename: Praveen C
authors.initials: PC
authors.lastname: Verma
authors.affiliation: Department of Biochemistry, Banaras Hindu University, Varanasi, India.
authors.forename: Sushma
authors.initials: S
authors.lastname: Rathaur
authors.affiliation: Eco-auditing group, CSIR-National Botanical Research Institute, Lucknow, India. Electronic address: nanditasingh8@yahoo.co.in.
authors.forename: Nandita
authors.initials: N
authors.lastname: Singh
mesh_terms: D000598:Amino Acids, Cyclic; D001151:Arsenic / Q000032:analysis* / Q000378:metabolism; D001673:Biodegradation, Environmental; D002734:Chlorophyll / Q000378:metabolism; D006090:Gram-Negative Bacteria / Q000254:growth & development / Q000378:metabolism* / Q000502:physiology; D012275:Oryza / Q000737:chemistry / Q000187:drug effects / Q000254:growth & development*; D018517:Plant Roots / Q000737:chemistry / Q000254:growth & development; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism
chemical_list: D000598:Amino Acids, Cyclic; D012989:Soil Pollutants; D002734:Chlorophyll; C023863:1-aminocyclopropane-1-carboxylic acid; D001151:Arsenic
keywords: Arsenic; B. diminuta; Oryza sativa L.; Plant growth; Scanning electron microscope (SEM)