Role of metal resistant plant growth promoting bacteria in ameliorating fly ash to the growth of Brassica juncea

Kumar, K. V. K.; Srivastava, Shubhi; Singh, Nandita; Behl, H. M.

doi:10.1016/j.jhazmat.2009.04.132

Cited by 143 publications

(48 citation statements)

References 70 publications

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“…A large number of researches demonstrated that PSB strains could improve plant growth, such as Brassica napus L. (Freitas et al, 1997), Zea mays L. (Nadeem et al, 2007), Brassica juncea (Kumar et al, 2009), Stevia rebaudiana (Mamta et al, 2010), sugarcane (Beneduzi et al, 2013), and cotton (Wu et al, 2014). In this study, PSB treatment increased the plant height, stem thickness, root and shoot dry weight of V. vinifera cv.…”

Section: Effects Of Psb On Plant Growthmentioning

confidence: 50%

Selection and evaluation of phosphate-solubilizing bacteria from grapevine rhizospheres for use as biofertilizers

Ling

Liu

Cheng

et al. 2017

Span. j. agric. res.

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Phosphate-solubilizing bacteria (PSB) have the ability to solubilize insoluble phosphorus (P) and release soluble P. Extensive research has been performed with respect to PSB isolation from the rhizospheres of various plants, but little is known about the prevalence of PSB in the grapevine rhizosphere. In this study, we aimed to isolate and identify PSB from the grapevine rhizosphere in five vineyards of Northwest China, to characterize their plant-growth-promoting (PGP) traits, evaluate the effect of stress on their phosphate-solubilizing activity (PSA), and test their ability to stimulate the growth of Vitis vinifera L. cv. Cabernet Sauvignon. From the vineyard soils, 66 PSB isolates were screened, and 10 strains with high PSA were identified by 16S rRNA sequencing. Sequence analysis revealed that these 10 strains belonged to 4 genera and 5 species: Bacillus aryabhattai, B. megaterium, Klebsiella variicola, Stenotrophomonas rhizophila, and Enterobacter aerogenes. The selected PSB strains JY17 (B. aryabhattai) and JY22 (B. aryabhattai) were positive for multiple PGP traits, including nitrogen fixation and production of indole acetic acid (IAA), siderophores, 1-aminocyclopropane-1-carboxylate (ACC) deaminase, chitinase, and protease. JY17 and JY22 showed strong PSA under stress conditions of high pH, high salt, and high temperature. Therefore, these two isolates can be used as biofertilizers in saline-alkaline soils. The inoculation with PSB significantly facilitated the growth of V. vinifera cv. Cabernet Sauvignon under greenhouse conditions. Use of these PSB as biofertilizers will increase the available P content in soils, minimize P-fertilizer application, reduce environmental pollution, and promote sustainable agriculture.Additional key words: promote plant growth; inorganic phosphate; stress conditions; saline-alkaline soil; Vitis vinifera L. cv. Cabernet SauvignonAbbreviations used: ACC (1-aminocyclopropane-1-carboxylate); CAS (chrome azurol S); DF (Dworkin-Foster); GADH (gluconate dehydrogenase); IAA (indole acetic acid); NBRIP (National Botanical Research Institute's phosphate); PGP (plant-growthpromoting); PQQ-GDH (pyrroloquinoline quinone-dependent glucose dehydrogenase); PSA (phosphate-solubilizing activity); PSB (phosphate-solubilizing bacteria); TCP (tricalcium phosphate).Authors' contributions: ML drafted the manuscript; XL made critical revision of the manuscript for important intellectual content; BSC and XLM acquired, analyzed and interpreted data; XTL coordinated the research project; XFZ performed statistical analysis; YLJ and ZM proposed revision suggestions; YLF supervised the work.Citation: Liu, M.; Liu, X.; Cheng, B. S.; Ma, X. L.; Lyu, X. T.; Zhao, X. F.; Ju, Y. L.; Min, Z.; Fang, Y. L. (2016). Selection and evaluation of phosphate-solubilizing bacteria from grapevine rhizospheres for use as biofertilizers.

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Section: Effects Of Psb On Plant Growthmentioning

confidence: 50%

Selection and evaluation of phosphate-solubilizing bacteria from grapevine rhizospheres for use as biofertilizers

Ling

Liu

Cheng

et al. 2017

Span. j. agric. res.

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“…A number of transition metals (Cu, Zn, Ni, Mn, Fe) are micronutrients necessary for various metabolic pathways during the plant growth process (24), but high levels of metal(loid)s are toxic to plants (45). Therefore, with an increasing number of plantgrowth-promoting bacteria (PGPB) reported, bacterially assisted phytoremediation in heavy-metal-contaminated environment deserves special attention (9,39,53).…”

Section: Discussionmentioning

confidence: 99%

“…Various rhizobacteria have been reported to benefit their host plants in heavy-metal-contaminated environments (22,24,44). Dimkpa et al showed that the production of phytohormones could still proceed under heavy-metal stress (10,11).…”

Section: Isolation and Identification Of Agrobacterium Tumefaciens CCmentioning

confidence: 99%

Genome Sequence and Mutational Analysis of Plant-Growth-Promoting Bacterium Agrobacterium tumefaciens CCNWGS0286 Isolated from a Zinc-Lead Mine Tailing

Hao

Xie

Johnstone

et al. 2012

Appl Environ Microbiol

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The plant-growth-promoting bacterium Agrobacterium tumefaciens CCNWGS0286, isolated from the nodules of Robinia pseudoacacia growing in zinc-lead mine tailings, both displayed high metal resistance and enhanced the growth of Robinia plants in a metal-contaminated environment. Our goal was to determine whether bacterial metal resistance or the capacity to produce phytohormones had a larger impact on the growth of host plants under zinc stress. Eight zinc-sensitive mutants and one zinc-sensitive mutant with reduced indole-3-acetic acid (IAA) production were obtained by transposon mutagenesis. Analysis of the genome sequence and of transcription via reverse transcriptase PCR (RT-PCR) combined with transposon gene disruptions revealed that ZntA-4200 and the transcriptional regulator ZntR1 played important roles in the zinc homeostasis of A. tumefaciens CCNWGS0286. In addition, interruption of a putative oligoketide cyclase/lipid transport protein reduced IAA synthesis and also showed reduced zinc and cadmium resistance but had no influence on copper resistance. In greenhouse studies, R. pseudoacacia inoculated with A. tumefaciens CCNWGS0286 displayed a significant increase in biomass production over that without inoculation, even in a zinc-contaminated environment. Interestingly, the differences in plant biomass improvement among A. tumefaciens CCNWGS0286, A. tumefaciens C58, and zinc-sensitive mutants 12-2 (zntA::Tn5) and 15-6 (low IAA production) revealed that phytohormones, rather than genes encoding zinc resistance determinants, were the dominant factor in enhancing plant growth in contaminated soil. P lant-growth-promoting bacteria (PGPB) play a key role in host plant adaptation to metal-contaminated environments through triggering physiological changes in plant cell metabolism so that growing plants can tolerate high concentrations of transition or heavy metals (7,26). PGPB have been isolated from various plants in heavy-metal-contaminated environments (3, 47-49). They were able to enhance plant growth, make plants more tolerant to heavy and transition metals, and thus accelerate phytoremediation by mechanisms including nitrogen fixation, nitrogen and phosphorus metabolism, and the production of siderophores, organic acids, 1-aminocyclopropane-1-carboxylate deaminase (ACC), and phytohormones such as indole-3-acetic acid (IAA), cytokinins, acetoin, and 2,3-butanediol (21, 41, 54). It was reported previously that the existence of high concentrations of metals selected for more metal resistant PGPB to resist these adverse environmental conditions (20,26). However, it is often not known which trait of the PGPB, e.g., tolerance to heavy and transition metals, phytohormones, or a combination of the two, plays the dominant role in the survival of a given plant in a metal-contaminated environment.Agrobacterium tumefaciens is a soilborne alphaproteobacterium belonging to the family Rhizobiaceae whose ability to induce crown gall tumors on dicotyledonous plants makes it of great concern worldwide. Recently, many nonpath...

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“…Ethylene is a plant hormone that prevents the root elongation. Many plant growth promoting strains have the capability to produce 1-aminocyclopropane-1-corboxylic acid deaminase which inhibits the production of ethylene and facilitate elongation of root length more profoundly (Kumar et al, 2009). …”

Section: Production Of Plant Growth Promoting (Pgp) Substancesmentioning

confidence: 99%

Associated microflora of medicinal ferns: biotechnological potentials and possible applications

Srivastava

Paul

2016

IJB

Self Cite

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Plant associated microorganisms that colonize the upper and internal tissues of roots, stems, leaves and flowers of healthy plants without causing any visible harmful or negative effect on their host. Diversity of microbes have been extensively studied in a wide variety of vascular plants and shown to promote plant establishment, growth and development and impart resistance against pathogenic infections. Ferns and their associated microbes have also attracted the attention of the scientific communities as sources of novel bioactive secondary metabolites. The ferns and fern alleles, which are well adapted to diverse environmental conditions, produce various secondary metabolites such as flavonoids, steroids, alkaloids, phenols, triterpenoid compounds, variety of amino acids and fatty acids along with some unique metabolites as adaptive features and are traditionally used for human health and medicine. In this review attention has been focused to prepare a comprehensive account of ethnomedicinal properties of some common ferns and fern alleles. Association of bacteria and fungi in the rhizosphere, phyllosphere and endosphere of these medicinally important ferns and their interaction with the host plant has been emphasized keeping in view their possible biotechnological potentials and applications. The processes of host-microbe interaction leading to establishment and colonization of endophytes are less-well characterized in comparison to rhizospheric and phyllospheric microflora. However, the endophytes are possessing same characteristics as rhizospheric and phyllospheric to stimulate the in vivo synthesis as well as in vitro production of secondary metabolites with a wide range of biological activities such as plant growth promotion by production of phytohormones, siderophores, fixation of nitrogen, and phosphate solubilization. Synthesis of pharmaceutically important products such as anticancer compounds, antioxidants, antimicrobials, antiviral substances and hydrolytic enzymes could be some of the promising areas of research and commercial exploitation.

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Role of metal resistant plant growth promoting bacteria in ameliorating fly ash to the growth of Brassica juncea

Cited by 143 publications

References 70 publications

Selection and evaluation of phosphate-solubilizing bacteria from grapevine rhizospheres for use as biofertilizers

Selection and evaluation of phosphate-solubilizing bacteria from grapevine rhizospheres for use as biofertilizers

Genome Sequence and Mutational Analysis of Plant-Growth-Promoting Bacterium Agrobacterium tumefaciens CCNWGS0286 Isolated from a Zinc-Lead Mine Tailing

Associated microflora of medicinal ferns: biotechnological potentials and possible applications

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