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https://www.readbyqxmd.com/read/28224000/co-inoculation-effect-of-rhizobia-and-plant-growth-promoting-rhizobacteria-on-common-bean-growth-in-a-low-phosphorus-soil
#1
Hezekiah Korir, Nancy W Mungai, Moses Thuita, Yosef Hamba, Cargele Masso
Nitrogen (N) fixation through legume-Rhizobium symbiosis is important for enhancing agricultural productivity and is therefore of great economic interest. Growing evidence indicates that other soil beneficial bacteria can positively affect symbiotic performance of rhizobia. Nodule endophytic plant growth promoting rhizobacteria (PGPR) were isolated from common bean nodules from Nakuru County in Kenya and characterized 16S rDNA partial gene sequencing. The effect of co-inoculation of rhizobium and PGPR, on nodulation and growth of common bean (Phaseolus vulgaris L...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28214450/in-silico-structural-and-functional-analysis-of-mesorhizobium-acc-deaminase
#2
Krishnendu Pramanik, Tithi Soren, Soumik Mitra, Tushar Kanti Maiti
Nodulation is one of the very important processes of legume plants as it is the initiating event of fixing nitrogen. Although ethylene has essential role in normal plant metabolism but it has also negative impact on plants particularly in nodule formation in legume plants. It is also produced due to a variety of biotic or abiotic stresses. 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase is a rhizobial enzyme which cleaves ACC (immediate precursor of ethylene) into α-ketobutyrate and ammonia. As a result, the level of ethylene from the plant cells is decreased and the negative impact of ethylene on nodule formation is reduced...
February 11, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28177799/the-effects-of-pantoea-sp-y4-4-on-alfalfa-in-the-remediation-of-heavy-metal-contaminated-soil-and-auxiliary-impacts-of-plant-residues-on-the-remediation-of-saline-alkali-soils
#3
Shuhuan Li, Jie Wang, Nanxiong Gao, Lizhu Liu, Yahua Chen
The plant growth-promoting rhizobacteria (PGPR) Y4-4 was isolated from plant rhizosphere soil and identified as Pantoea sp. by 16S rRNA sequence analysis. The effects of strain Y4-4 on alfalfa grew in heavy metals contaminated soil was investigated using a pot experiment. In Cu rich environment, the dry weight from shoot and total of plant inoculated with strain Y4-4 increased by 22.6% and 21%, and Cu accumulation increased by 15%. In Pb-Zn rich environment, the dry weight from shoot and total of plant inoculated with strain Y4-4 increased by 23...
November 30, 2016: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28118091/paraburkholderia-phytofirmans-psjn-protects-arabidopsis-thaliana-against-a-virulent-strain-of-pseudomonas-syringae-through-the-activation-of-induced-resistance
#4
Tania Timmermann, Grace Armijo, Raúl A Donoso, Aldo Seguel, Loreto Holuigue, Bernardo Gonzalez
Paraburkholderia phytofirmans PsJN is a plant growth-promoting rhizobacterium (PGPR) that stimulates plant growth and improves tolerance to abiotic stresses. This study analyzed whether strain PsJN can reduce plant disease severity and proliferation of the virulent strain Pseudomonas syringae pv tomato (Pst) DC3000 in Arabidopsis plants, through the activation of induced resistance. Arabidopsis plants previously exposed to strain PsJN showed a reduction in disease severity and pathogen proliferation in leaves compared to non-inoculated, infected plants...
January 24, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28063921/tricalcium-phosphate-solubilization-and-nitrogen-fixation-by-newly-isolated-aneurinibacillus-aneurinilyticus-ckmv1-from-rhizosphere-of-valeriana-jatamansi-and-its-growth-promotional-effect
#5
Anjali Chauhan, Shiwani Guleria, Praveen P Balgir, Abhishek Walia, Rishi Mahajan, Preeti Mehta, Chand Karan Shirkot
Aneurinibacillus aneurinilyticus strain CKMV1 was isolated from rhizosphere of Valeriana jatamansi and possessed multiple plant growth promoting traits like production of phosphate solubilization (260mg/L), nitrogen fixation (202.91nmolethylenemL(-1)h(-1)), indole-3-acetic acid (IAA) (8.1μg/mL), siderophores (61.60%), HCN (hydrogen cyanide) production and antifungal activity. We investigated the ability of isolate CKMV1 to solubilize insoluble P via mechanism of organic acid production. High-performance liquid chromatography (HPLC) study showed that isolate CKMV1 produced mainly gluconic (1...
December 24, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28018395/proteomic-analysis-reveals-the-positive-roles-of-the-plant-growth-promoting-rhizobacterium-nsy50-in-the-response-of-cucumber-roots-to-fusarium-oxysporum-f-sp-cucumerinum-inoculation
#6
Nanshan Du, Lu Shi, Yinghui Yuan, Bin Li, Sheng Shu, Jin Sun, Shirong Guo
Plant-growth-promoting rhizobacteria (PGPR) can both improve plant growth and enhance plant resistance against a variety of environmental stresses. To investigate the mechanisms that PGPR use to protect plants under pathogenic attack, transmission electron microscopy analysis and a proteomic approach were designed to test the effects of the new potential PGPR strain Paenibacillus polymyxa NSY50 on cucumber seedling roots after they were inoculated with the destructive phytopathogen Fusarium oxysporum f. sp...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28004873/plant-defence-induced-by-pgpr-against-spodoptera-litura-in-tomato-solanum-lycopersicum-l
#7
A Bano, R Muqarab
: The research conducted including its rationale: Spodoptera litura is the major pest of tomato causing significant reduction in tomato yield. Application of Plant growth promoting rhizobacteria(PGPR) prevent use of chemical fertilizer and synthetic pesticides through enhancement of plant growth and yield and induction of systemic resistance. Present investigation is an attempt to evaluate the role of PGPR, Pseudomonas putida and Rothia sp. on the physiology and yield of tomato fruit infested with the S...
December 22, 2016: Plant Biology
https://www.readbyqxmd.com/read/27986826/the-contribution-of-genome-mining-strategies-to-the-understanding-of-active-principles-of-pgpr-strains
#8
Julia Paterson, Ghazaleh Jahanshah, Yan Li, Qi Wang, Samina Mehnaz, Harald Gross
Pathogenic microorganisms and insects affecting plant health are a major and chronic threat to food production and the ecosystem worldwide. As agricultural production has intensified over the years, the use of agrochemicals has in turn increased. However, this extensive usage has had several detrimental effects, with a pervasive environmental impact and the emergence of pathogen resistance. In addition, there is an increasing tendency among consumers to give preference to pesticide-free food products. Biological control, through the employment of plant growth-promoting rhizobacteria (PGPR), is therefore considered a possible route to the reduction, even the elimination, of the use of agrochemicals...
March 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/27939684/malonylome-analysis-of-rhizobacterium-bacillus-amyloliquefaciens-fzb42-reveals-involvement-of-lysine-malonylation-in-polyketide-synthesis-and-plant-bacteria-interactions
#9
Ben Fan, Yu-Long Li, Lei Li, Xiao-Jun Peng, Chen Bu, Xiao-Qin Wu, Rainer Borriss
: Using the combination of affinity enrichment and high-resolution LC-MS/MS analysis, we performed a large-scale lysine malonylation analysis in the model representative of Gram-positive plant growth-promoting rhizobacteria (PGPR), Bacillus amyloliquefaciens FZB42. Altogether, 809 malonyllysine sites in 382 proteins were identified. The bioinformatic analysis revealed that lysine malonylation occurs on the proteins involved in a variety of biological functions including central carbon metabolism, fatty acid biosynthesis and metabolism, NAD(P) binding and translation machinery...
February 10, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/27937752/identification-of-root-secreted-compounds-involved-in-the-communication-between-cucumber-the-beneficial-bacillus-amyloliquefaciens-and-the-soil-borne-pathogen-fusarium-oxysporum
#10
Yunpeng Liu, Lin Chen, Gengwei Wu, Haichao Feng, Guishan Zhang, Qirong Shen, Ruifu Zhang
Colonization of plant growth-promoting rhizobacteria (PGPR) is critical for exerting their beneficial effects on the plant. Root exudation is a major factor influencing the colonization of both PGPR and soil-borne pathogens within the root system. However, the tripartite interaction of PGPR, plant roots, and soil-borne pathogens is poorly understood. We screened root exudates for signals that mediate tripartite interactions in the rhizosphere. In a split-root system, we found that root colonization of PGPR strain Bacillus amyloliquefaciens SQR9 on cucumber root was significantly enhanced by preinoculation with SQR9 or the soil-borne pathogen Fusarium oxysporum f...
January 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/27936865/alleviation-of-of-heavy-metals-toxicity-by-the-application-of-plant-growth-promoting-rhizobacteria-pgpr-and-effects-on-wheat-grown-in-saline-sodic-field
#11
Tamoor Ul Hassan, Asghari Bano, Irum Naz
The study was aimed to determine tolerance of PGPR in different concentration of Cu, Cr, Co, Cd, Ni, Mn and Pb and to evaluate the PGPR modulated bio-availability of different heavy metals, in the rhizosphere soil and wheat tissues, grown in saline sodic soil. Bacillus cereus and Pseudomonas moraviensis were isolated from Cenchrus ciliaris L. growing in Khewra salt range. Seven days old cultures of PGPR were applied on wheat as single inoculum, co- inoculation and carrier based biofertilizer (using maize straw and sugarcane husk as carrier)...
December 12, 2016: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/27934976/influence-of-double-w1-o-w2-emulsion-composition-on-lubrication-properties
#12
A K L Oppermann, L C Verkaaik, M Stieger, E Scholten
Double (w1/o/w2) emulsions are potential fat replacers in foods. Fats are known for their lubricating properties, which contribute to texture perception. It is therefore of interest to understand how the composition of double emulsions influences lubrication properties. This study focuses on the understanding of the influence of the fraction of inner dispersed aqueous phase w1 and the gelation of the w1 droplets on the lubrication properties of double emulsions. The addition of an inner water phase w1 to the oil droplets decreased friction at low entrainment speeds due to adsorption of the lipophilic emulsifier polyglycerol polyricinoleate (PGPR) at the hydrophobic tribo-surface...
December 9, 2016: Food & Function
https://www.readbyqxmd.com/read/27924118/native-halo-tolerant-plant-growth-promoting-rhizobacteria-enterococcus-and-pantoea-sp-improve-seed-yield-of-mungbean-vigna-radiata-l-under-soil-salinity-by-reducing-sodium-uptake-and-stress-injury
#13
Meenu Panwar, Rupinder Tewari, Harsh Nayyar
The beneficial microbial-plant interaction plays important role in the soil health, crop growth and productivity. Plant growth promoting rhizobacteria (PGPR) are such beneficial microorganisms, which in association with plant roots not only promote their growth but also help in counteracting the detrimental effects of soil stresses. Salt stress is one such stress, frequently confronted by the plants. The present study aimed at isolation and identification of PGPR inhabiting the mungbean rhizosphere, testing them for salt (NaCl) tolerance and subsequently in salt-supplemented mungbean crop...
October 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/27921398/effects-of-rhizobacteria-paenibacillus-polymyxa-apec136-and-bacillus-subtilis-apec170-on-biocontrol-of-postharvest-pathogens-of-apple-fruits
#14
Young Soo Kim, Kotnala Balaraju, Yongho Jeon
In this study, plant growth-promoting rhizobacteria (PGPR) were evaluated as potential biocontrol agents against postharvest pathogens of apple fruits. In vitro bioassays revealed that, out of 30 isolates screened, isolates APEC136 and APEC170 had the most significant inhibitory effects against the mycelial growth of several fungal pathogens. Analysis of 16S ribosomal RNA (rRNA) sequences identified the two effective isolates as Paenibacillus polymyxa and Bacillus subtilis, respectively. The two strains showed greater growth in brain-heart infusion broth than in other growth media...
2016: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/27920781/inoculation-of-schizolobium-parahyba-with-mycorrhizal-fungi-and-plant-growth-promoting-rhizobacteria-increases-wood-yield-under-field-conditions
#15
Martha V T Cely, Marco A Siviero, Janaina Emiliano, Flávia R Spago, Vanessa F Freitas, André R Barazetti, Erika T Goya, Gustavo de Souza Lamberti, Igor M O Dos Santos, Admilton G De Oliveira, Galdino Andrade
Schizolobium parahyba var. amazonicum (Huber ex Ducke) occurs naturally in the Brazilian Amazon. Currently, it is being planted extensively because of its fast growth and excellent use in forestry. Consequently, there is great interest in new strategies to increase wood production. The interaction between soil microorganisms and plants, specifically in the roots, provides essential nutrients for plant growth. These interactions can have growth-promoting effects. In this way, this study assessed the effect of the inoculation with arbuscular mycorrhizal fungi (AMF) and plant growth-promoting rhizobacteria (PGPR) on growth of S...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27914208/effect-of-rhizobacterial-consortia-from-undisturbed-arid-and-agro-ecosystems-on-wheat-growth-under-different-conditions
#16
N G Inostroza, P J Barra, L Y Wick, M L Mora, M A Jorquera
: Plant growth-promoting rhizobacteria (PGPR) are studied as complements/alternatives to chemical fertilizers used in agriculture. However, poor information exists on the potential of PGPR from undisturbed ecosystems. Here, we have evaluated the plant growth-promoting (PGP) effect of rhizobacterial consortia from undisturbed Chilean arid ecosystems (Consortium C1) and agro-ecosystems (Consortium C2) on plant biomass production. The PGP effects of C1 and C2 were assayed in wheat seedlings (Triticum aestivum L...
February 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/27864849/impact-of-plant-growth-promoting-rhizobacteria-on-root-colonization-potential-and-life-cycle-of-rhizophagus-irregularis-following-co-entrapment-into-alginate-beads
#17
P Loján, M Demortier, S L S Velivelli, S Pfeiffer, J P Suárez, P de Vos, B D Prestwich, A Sessitsch, S Declerck
AIMS: This study aimed at evaluating the impact of seven plant growth-promoting rhizobacteria (PGPR) on root colonization and life cycle of Rhizophagus irregularis MUCL 41833 when co-entrapped in alginate beads. METHODS AND RESULTS: Two in vitro experiments were conducted. The first consisted of the immobilization of R. irregularis and seven PGPR isolates into alginate beads to assess the effect of the bacteria on the pre-symbiotic growth of the fungus. In the second experiment, the best performing PGPR from experiment 1 was tested for its ability to promote the symbiotic development of the AMF in potato plantlets from three cultivars...
February 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27847812/comparative-genomic-analysis-of-delftia-tsuruhatensis-mtq3-and-the-identification-of-functional-nrps-genes-for-siderophore-production
#18
Haimeng Guo, Yanan Yang, Kai Liu, Wenfeng Xu, Jianyong Gao, Hairong Duan, Binghai Du, Yanqin Ding, Chengqiang Wang
Plant growth-promoting rhizobacteria (PGPR) are a group of rhizosphere bacteria that promote plant growth. Delftia tsuruhatensis MTQ3 is a member of PGPR that produces siderophores. The draft genome sequence of MTQ3 has been reported. Here, we analyzed the genome sequence of MTQ3 and performed a comparative genome analysis of four sequenced Delftia strains, revealing genetic relationships among these strains. In addition, genes responsible for bacteriocin and nonribosomal peptide synthesis were detected in the genomes of each strain...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27790198/halotolerant-rhizobacteria-promote-growth-and-enhance-salinity-tolerance-in-peanut
#19
Sandeep Sharma, Jayant Kulkarni, Bhavanath Jha
Use of Plant growth promoting rhizobacteria (PGPR) is a promising strategy to improve the crop production under optimal or sub-optimal conditions. In the present study, five diazotrophic salt tolerant bacteria were isolated from the roots of a halophyte, Arthrocnemum indicum. The isolates were partially characterized in vitro for plant growth promoting traits and evaluated for their potential to promote growth and enhanced salt tolerance in peanut. The 16S rRNA gene sequence homology indicated that these bacterial isolates belong to the genera, Klebsiella, Pseudomonas, Agrobacterium, and Ochrobactrum...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27739900/the-effect-of-plant-growth-promoting-rhizobacteria-on-the-phytoextraction-of-cd-and-zn-by-brassica-napus-l
#20
G Dąbrowska, K Hrynkiewicz, A Trejgell, C Baum
The test strains Bacteroidetes bacterium (Ba), Pseudomonas fluorescens (Pf) and Variovorax sp. (Va) were selected in advance for their in vitro capability for growth promotion of rapeseed in the presence of increased concentrations of Cd, Cu, Pb and Zn in the medium. In the pot experiment the strains were used for single Ba, Pf, Va or combined Ba+Pf, Ba+Va, Pf+Va, Ba+Pf+Va inoculation of B. napus growing in contaminated soil from alluvial deposits. The positive effect of bacterial strains on plant growth was observed in vitro, but was not confirmed in situ in the contaminated soil, where the tested strains inhibited biomass production, rather than stimulating it...
October 14, 2016: International Journal of Phytoremediation
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