Impact of plant growth promoting Pseudomonas monteilii PsF84 and Pseudomonas plecoglossicid a PsF610 on metal uptake and production of secondary metabolite (monoterpenes) by rose-scented geranium ( Pelargonium graveolens cv. bourbon) grown on tannery sludge amended soil

Dharni, Seema; Srivastava, Atul; Samad, Abdul; Patra, D. D.

doi:10.1016/j.chemosphere.2014.08.001

Cited by 62 publications

(15 citation statements)

References 26 publications

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“…However, some genera that were distributed broadly in soils and have been shown to be beneficial to soil health were inhibited by increasing DMP concentration (Figure 1 ). These genera included Pseudomonas (Troxler et al, 2012 ; Dharni et al, 2014 ; Stelting et al, 2014 ), Flexibacter (Jones and Knowles, 1991 ; Drijber and McGill, 1994 ), Devosia (Rivas et al, 2002 ; Ryu et al, 2008 ; Hassan et al, 2014 ), and Flavobacterium (Das et al, 2012 ; Kolton et al, 2014 ). The relative percentages of some genera increased by the lower DMP concentrations (5, 10, and 20 mg/kg), but then they were inhibited by the high DMP concentration (40 mg/kg), such as the case in Microvirga (Figure 1 ).…”

Section: Discussionmentioning

confidence: 99%

Impacts of dimethyl phthalate on the bacterial community and functions in black soils

Wang

et al. 2015

Front. Microbiol.

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Dimethyl phthalate (DMP), a known endocrine disruptor and one of the phthalate esters (PAEs), is a ubiquitous pollutant. Its impacts on living organisms have aroused great concern. In this study, the impacts of DMP contamination on bacterial communities and functions were tested by using microcosm model in black soils. The results showed that the operational taxonomic unit (OTUs) richness and bacterial diversity were reduced by DMP contamination. The relative percentages of some genera associated with nitrogen metabolism were increased by DMP contamination, while the relative percentages of some other genera that were extremely beneficial to soil health were decreased by DMP contamination. Further, the relative percentages of some genera that possessed the capability to degrade DMP were increased by the DMP treatment at low concentrations (5, 10, and 20 mg/kg), but were decreased by the high concentration DMP treatment (40 mg/kg). Clearly, DMP contamination changed the bacterial community structure and disturbed the metabolic activity and functional diversity of the microbes in black soils. Our results suggest that DMP pollution can alter the metabolism and biodiversity of black soil microorganisms, thereby directly impact fertility and ecosystem functions.

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Section: Discussionmentioning

confidence: 99%

Impacts of dimethyl phthalate on the bacterial community and functions in black soils

Wang

et al. 2015

Front. Microbiol.

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“…Jha et al (2009) found that this genus can be used as biofertilizers as well as biocontrol agents because of the innate potential of phosphate solubilization, production of siderophores, IAA, protease, cellulase and HCN. Dharni et al (2014) found that the P. plecoglossicida PsF610 increased the dry biomass of rose-scented geranium (Pelargonium graveolens cv. bourbon) shoots by 38%, roots by 40%, essential oil yield 39% and chlorophyll by 28%, respectively, over uninoculated controls.…”

Section: Discussionmentioning

confidence: 99%

Isolation and characterization of three new PGPR and their effects on the growth of Arabidopsis and Datura plants

Rahmoune

Morsli

Khelifi-Slaoui

et al. 2016

Journal of Plant Interactions

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This study characterizes three bacterial strains isolated from plant rhizospheres and evaluates their performance as plant-growth-promoting rhizobacteria. Pseudomonas plecoglossicida strain Pp20 was isolated from the rhizosphere of a date palm in Bechar (Algerian Sahara), Bacillus spec. strain Bt04 isolated from the rhizosphere of pear in Ghardaia (Algerian Sahara) and Lysinibacillus fusiformis strain Lf89 was isolated from the rhizosphere of tomato in Ain Defla (northern Algeria). Their effects on plant growth and development were analyzed in different in vitro cultures: an Arabidopsis thaliana plate assay and two hydroponic systems for Datura stramonium and Datura tatula. Our results show that all strains significantly improve plant growth of the plant species tested and some strains produce a shift in the C/N ratio in A. thaliana. Inoculation had no effect on alkaloid production per gram leaf dry weight in D. stramonium, but specific plant-growth-promoting rhizobacteria interactions may alter the alkaloid composition in the shoot. ARTICLE HISTORY

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“…In nature, plant roots undergo various types of interactions with microorganisms. These interactions are usually regulated by various physiochemical and biolo-gical conditions, and become the key element responsible for plant growth and propagation (Dharni et al, 2014). IAA is considered to be the main biologically active plant hormone of the auxin class and is a product of L-tryptophan (Trp) metabolism.…”

Section: Introductionmentioning

confidence: 99%

Production of indole acetic acid by Kocuria rosea VB1 and Arthrobacter luteolus VB2 under the influence of L-tryptophan and maize root exudates

Karnwal¹

2019

bta

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Phytohormones play a very important role in enhancing plant growth by direct or indirect mechanisms involving plant-microbe interactions. Indole acetic acid (IAA) is one of the key phytohormones that directly enhance plant development. Kocuria rosea VB1 (GenBank ID: KY608093.1) and Arthrobacter luteolus VB2 (GenBank ID: KY608094.1) from polluted industrial water samples were characterized through a biochemical assay, 16S rDNA sequencing, and for promoting plant growth abilities. IAA production by VB1 and VB2 was tested in pure culture conditions supplemented with various L-tryptophan (Trp) concentrations (0, 50, 100, 200, and 500 μg @ ml !1). A significant difference in indole production by VB2 and VB1 inoculant at various L-Trp concentrations has been observed. VB1 has been reported to produce increased amounts of indole from 0.33 μg @ ml !1 to 18.16 μg @ ml !1 , while the increase in indole production was from 0.63 μg @ ml !1 to 9.22 μg @ ml !1 for VB2 for various L-Trp concentrations. The VB1 strain produced 85.07 ng @ ml !1 and 123.7 ng @ ml !1 IAA, whereas the VB2 strain produced 70.3 ng @ ml !1 and 78.4 ng @ ml !1 IAA, respectively at 200 and 500 μg @ ml !1 Trp concentrations. The growth pouch experiments with maize root exudates also showed a positive effect for both bacterial inoculants tested on IAA biosynthesis in comparison to non-inoculated seeds. Inoculation of maize seeds with VB2 and VB1 bacteria gave a significantly higher level of IAA production in comparison to non-inoculated seeds. Current study outcomes show the beneficial aspects of plant growth regulators produced by free-living bacteria which could play a significant role in plant growth promotion.

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Impact of plant growth promoting Pseudomonas monteilii PsF84 and Pseudomonas plecoglossicid a PsF610 on metal uptake and production of secondary metabolite (monoterpenes) by rose-scented geranium ( Pelargonium graveolens cv. bourbon) grown on tannery sludge amended soil

Cited by 62 publications

References 26 publications

Impacts of dimethyl phthalate on the bacterial community and functions in black soils

Impacts of dimethyl phthalate on the bacterial community and functions in black soils

Isolation and characterization of three new PGPR and their effects on the growth of Arabidopsis and Datura plants

Production of indole acetic acid by Kocuria rosea VB1 and Arthrobacter luteolus VB2 under the influence of L-tryptophan and maize root exudates

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