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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
#1
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
#2
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
#3
Rafia Muqarab, Asghari Bano
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 Spodoptera litura.The surface sterilized seeds of tomato were inoculated with 48h culture of Pseudomonas putida and Rothia sp...
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
#4
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...
December 15, 2016: 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
#5
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...
December 8, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27937752/identification-of-root-secreted-compounds-involved-in-the-communication-between-soil-borne-pathogen-cucumber-bacillus-amyloliquefaciens-sqr9
#6
Yunpeng Liu, Lin Chen, Gengwei Wu, Haichao Feng, Guishan Zhang, Qi-Rong 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. This research aimed to screen root exudates for signals, which 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 pre-inoculation with SQR9 or the soil-borne pathogen Fusarium oxysporum f...
December 12, 2016: 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
#7
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
#8
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
#9
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
#10
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
#11
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-differing-conditions
#12
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 fertilization in agriculture. Poor information however, exists on the potential of PGPR from undisturbed ecosystems. Here, we 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.) grown in pots under growth chamber conditions and in pots placed in an open greenhouse under natural conditions, using two different Chilean Andisols (Piedras Negras and Freire series) kept either at 30% or 60% of their maximum water holding capacity (MWHC)...
December 3, 2016: 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
#13
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...
November 19, 2016: 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
#14
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
#15
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
#16
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
https://www.readbyqxmd.com/read/27708387/plant-growth-promoting-rhizobacteria-dietzia-natronolimnaea-modulates-the-expression-of-stress-responsive-genes-providing-protection-of-wheat-from-salinity-stress
#17
Nidhi Bharti, Shiv Shanker Pandey, Deepti Barnawal, Vikas Kumar Patel, Alok Kalra
Plant growth promoting rhizobacteria (PGPR) hold promising future for sustainable agriculture. Here, we demonstrate a carotenoid producing halotolerant PGPR Dietzia natronolimnaea STR1 protecting wheat plants from salt stress by modulating the transcriptional machinery responsible for salinity tolerance in plants. The expression studies confirmed the involvement of ABA-signalling cascade, as TaABARE and TaOPR1 were upregulated in PGPR inoculated plants leading to induction of TaMYB and TaWRKY expression followed by stimulation of expression of a plethora of stress related genes...
October 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27682316/antibacterial-effects-of-volatiles-produced-by-bacillus-strain-d13-against-xanthomonas-oryzae-pv-oryzae
#18
Shanshan Xie, Haoyu Zang, Huijun Wu, Uddin Rajer Faheem, Xuewen Gao
Recent investigations have demonstrated that bacteria employ the volatile compounds they produce during interactions with other organisms such as plants, fungi, nematodes and bacteria. However, studies focused on the antibacterial activity of plant growth promoting rhizobacteria (PGPR) volatiles against bacterial phytopathogens are still rare. In this study, Bacillus strain D13, which is antagonistic to Xanthomonas oryzae pv. oryzae (Xoo), was isolated and screened. Volatile compounds emitted from strain D13 reduced the colony diameter and cell motility of Xoo cultured in divided Petri plates...
September 29, 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/27660605/lettuce-and-rhizosphere-microbiome-responses-to-growth-promoting-pseudomonas-species-under-field-conditions
#19
Matheus A P Cipriano, Manoeli Lupatini, Lucilene Lopes-Santos, Márcio J da Silva, Luiz F W Roesh, Suzete A L Destéfano, Sueli S Freitas, Eiko E Kuramae
Plant growth promoting rhizobacteria (PGPR) are well described and recommended for several crops worldwide. However, one of the most common problems in PGPR research is the difficulty in obtaining reproducible results. Furthermore, few studies have evaluated plant growth promotion and soil microbial community composition due to bacterial inoculation under field conditions. Here we evaluated the effect of 54 Pseudomonas strains on lettuce (Lactuca sativa) growth. The 12 most promising strains were phylogenetically and physiologically characterized for plant growth-promoting traits including phosphate solubilization, hormone production and antagonism to pathogen compounds and their effect on plant growth under farm field conditions...
September 21, 2016: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/27652147/crop-management-as-a-driving-force-of-plant-growth-promoting-rhizobacteria-physiology
#20
Juliana Melo, Manuela Carolino, Luís Carvalho, Patrícia Correia, Rogério Tenreiro, Sandra Chaves, Ana I Meleiro, Sávio B de Souza, Teresa Dias, Cristina Cruz, Alessandro C Ramos
Crop management systems influence plant productivity and nutrient use efficiency, as well as plant growth-promoting rhizobacteria (PGPR), which are known to influence the growth of plants via phytohormone production, phosphate solubilization, nitrogen (N) fixation and antimicrobial activity. The objective of this study was to compare the influence of two crop management system on microbial PGPR features. PGPR isolated from the rhizospheres of Carica papaya L. grown under two distinct management systems (conventional and organic) were identified and characterized...
2016: SpringerPlus
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