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https://www.readbyqxmd.com/read/29447189/drought-response-of-mucuna-pruriens-l-dc-inoculated-with-acc-deaminase-and-iaa-producing-rhizobacteria
#1
Aansa Rukya Saleem, Cecilia Brunetti, Azeem Khalid, Gianni Della Rocca, Aida Raio, Giovanni Emiliani, Anna De Carlo, Tariq Mahmood, Mauro Centritto
Drought is one of the major constraints limiting agricultural production worldwide and is expected to increase in the future. Limited water availability causes significant effects to plant growth and physiology. Plants have evolved different traits to mitigate the stress imposed by drought. The presence of plant growth-promoting rhizobacteria (PGPR) could play an important role in improving plant performances and productivity under drought. These beneficial microorganisms colonize the rhizosphere of plants and increase drought tolerance by lowering ethylene formation...
2018: PloS One
https://www.readbyqxmd.com/read/29433230/in-vitro-digestion-behavior-of-water-in-oil-in-water-emulsions-with-gelled-oil-water-inner-phases
#2
Jonathan Andrade, Amanda J Wright, Milena Corredig
Double emulsions may be able to protect and release in a controlled manner bioactive compounds during digestion of food matrices. It was hypothesized that the physical state and solid content in the inner phases of water-in-oil-in-water (W1/O/W2) emulsions may affect the overall stability and the release behavior of bioactives during in vitro digestion. Therefore, hydrophobic (phytosterols or Vitamin D3) and hydrophilic (Vitamin B12) molecules were incorporated in double emulsions prepared either with a liquid (soybean oil - SO) or oil-fat gel (soybean oil+trimyristin - STO) lipid phase and liquid internal aqueous phase...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29421676/dynamic-forces-between-emulsified-water-drops-coated-with-poly-glycerol-poly-ricinoleate-pgpr-in-canola-oil
#3
Srinivas Mettu, Chu Wu, Raymond R Dagastine
The dynamic collision of emulsified water drops in the presence of non-ionic surfactants plays a crucial role in many practical applications. Interaction force between water drops coated with non-ionic food grade surfactants is expected to exhibit rich dynamic behavior that is not yet explored. The collision forces between immobilized water drops in canola oil in the presence of a well-known food grade surfactant polyglycerol polyricinoleate (PGPR) are measured at concentrations well below typically used to form stable emulsions...
January 31, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29406736/determination-of-formulation-conditions-allowing-double-emulsions-stabilized-by-pgpr-and-sodium-caseinate-to-be-used-as-capsules
#4
Maxime Nollet, Eric Laurichesse, Samantha Besse, Olivier Soubabere, Véronique Schmitt
Water-in-oil-in-water (W1/O/W2) double emulsions stabilized by Polyglycerol polyricinoleate (PGPR), a lipophilic food grade small polymer and sodium caseinate, a hydrophilic milk protein were developed to encapsulate Vitamin B12, a model hydrophilic substance easy to titrate. Using rheology, sensitive to drop size evolution and water fluxes, static light scattering and microscopy both giving the evolution of drops' size and Vitamin B12 titration assessing the encapsulation, we were able to detect independently, the double emulsion drop size, the encapsulation loss and the flux of water as a function of time...
February 6, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29401742/induced-salt-tolerance-of-perennial-ryegrass-by-a-novel-bacterium-strain-from-the-rhizosphere-of-a-desert-shrub-haloxylon-ammodendron
#5
Ao-Lei He, Shu-Qi Niu, Qi Zhao, Yong-Sheng Li, Jing-Yi Gou, Hui-Juan Gao, Sheng-Zhou Suo, Jin-Lin Zhang
Drought and soil salinity reduce agricultural output worldwide. Plant-growth-promoting rhizobacteria (PGPR) can enhance plant growth and augment plant tolerance to biotic and abiotic stresses. Haloxylon ammodendron, a C4 perennial succulent xerohalophyte shrub with excellent drought and salt tolerance, is naturally distributed in the desert area of northwest China. In our previous work, a bacterium strain numbered as M30-35 was isolated from the rhizosphere of H. ammodendron in Tengger desert, Gansu province, northwest China...
February 5, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29368373/purple-corn-associated-rhizobacteria-with-potential-for-plant-growth-promotion
#6
A Castellano-Hinojosa, V Pérez-Tapia, E J Bedmar, N Santillana
AIMS: Purple corn (Zea mays var. purple amylaceum) is a native variety of the Peruvian Andes, cultivated at 3000 m since pre-Inca times without N fertilization. We aimed to isolate and identify native plant growth promoting rhizobacteria (PGPR) for future microbial-based inoculants. METHODS AND RESULTS: Eighteen strains were isolated from the rhizosphere of purple corn plants grown without N-fertilization in Ayacucho (Peru). The 16S rRNA gene clustered the 18 strains into 9 groups that contained species of Bacillus, Stenotrophomonas, Achromobacter, Paenibacillus, Pseudomonas and Lysinibacillus...
January 24, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29350476/investigating-the-mechanisms-underlying-phytoprotection-by-plant-growth-promoting-rhizobacteria-in-spartina-densiflora-under-metal-stress
#7
K Paredes-Páliz, R Rodríguez-Vázquez, B Duarte, M A Caviedes, E Mateos-Naranjo, S Redondo-Gómez, Isabel Caçador, Ignacio D Rodríguez-Llorente, E Pajuelo
Pollution of coasts by toxic metals and metalloids is a worldwide problem for which phytoremediation using halophytes and associated microbiomes is getting relevance. Metal(loid)s excess is a constraint for plant establishment and development, and plant growth promoting rhizobacteria (PGPR) mitigate plant stress under these conditions. However, mechanisms underlying this effect remain elusive. In this paper, the effect of toxic metal(loid)s on the activity of ROS-scavenging enzymes in roots of the halophyte Spartina densiflora grown on real polluted sediments in a green house experiment, was investigated...
January 19, 2018: Plant Biology
https://www.readbyqxmd.com/read/29331851/rhizospheric-microorganisms-as-a-solution-for-the-recovery-of-soils-contaminated-by-petroleum-a-review
#8
REVIEW
Jéssica Janzen Dos Santos, Leila Teresinha Maranho
Petroleum is currently the world's main energy source, and its demand is expected to increase in coming years. Its intense exploitation can lead to an increase in the number of environmental accidents, such as spills and leaks, and an increase in the generation of environmental liabilities resulting from refining. Due to its hydrophobic characteristics and slow process of biodegradation, petroleum can remain in the environment for a long time and its toxicity can cause a negative impact on both terrestrial and aquatic ecosystems, with the main negative effects related to its carcinogenic potential for both animals and humans...
January 11, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29331610/pseudomonas-putida-modulates-the-expression-of-mirnas-and-their-target-genes-in-response-to-drought-and-salt-stresses-in-chickpea-cicer-arietinum-l
#9
Ram Jatan, Puneet Singh Chauhan, Charu Lata
MicroRNAs are small non-coding regulatory RNA molecules that play an important role in the modulation of gene expression during various environmental stresses. Pseudomonas putida RA, a plant growth promoting rhizobacteria (PGPR) colonizes the root surface of plants improving their growth and development during abiotic stresses modulating the expression of stress-responsive genes; however, the impact of RA on stress responsive-miRNA remains elusive. The present study was an attempt to delineate the role of PGPR in modulating stress responsive-miRNAs in a tolerant desi chickpea genotype exposed to drought and salt stresses...
January 10, 2018: Genomics
https://www.readbyqxmd.com/read/29330694/volatile-compounds-from-beneficial-or-pathogenic-bacteria-differentially-regulate-root-exudation-transcription-of-iron-transporters-and-defense-signaling-pathways-in-sorghum-bicolor
#10
Erasto Hernández-Calderón, Maria Elizabeth Aviles-Garcia, Diana Yazmín Castulo-Rubio, Lourdes Macías-Rodríguez, Vicente Montejano Ramírez, Gustavo Santoyo, José López-Bucio, Eduardo Valencia-Cantero
Our results show that Sorghum bicolor is able to recognize bacteria through its volatile compounds and differentially respond to beneficial or pathogens via eliciting nutritional or defense adaptive traits. Plants establish beneficial, harmful, or neutral relationships with bacteria. Plant growth promoting rhizobacteria (PGPR) emit volatile compounds (VCs), which may act as molecular cues influencing plant development, nutrition, and/or defense. In this study, we compared the effects of VCs produced by bacteria with different lifestyles, including Arthrobacter agilis UMCV2, Bacillus methylotrophicus M4-96, Sinorhizobium meliloti 1021, the plant pathogen Pseudomonas aeruginosa PAO1, and the commensal rhizobacterium Bacillus sp...
January 12, 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/29330479/titania-tio2-nanoparticles-enhance-the-performance-of-growth-promoting-rhizobacteria
#11
Salme Timmusk, Gulaim Seisenbaeva, Lawrence Behers
A novel use of nanotitania (TNs) as agents in the nanointerface interaction between plants and colonization of growth promoting rhizobacteria (PGPR) is presented. The effectiveness of PGPRs is related to the effectiveness of the technology used for their formulation. TNs produced by the Captigel patented SolGel approach, characterized by the transmission and scanning electron microscopy were used for formulation of the harsh environment PGPR strains. Changes in the biomass of wheat seedlings and in the density of single and double inoculants with and without TNs were monitored during two weeks of stress induced by drought salt and by the pathogen Fusarium culmorum...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29329376/soil-microbial-species-loss-affects-plant-biomass-and-survival-of-an-introduced-bacterial-strain-but-not-inducible-plant-defences
#12
Viola Kurm, Wim H van der Putten, Ana Pineda, W H Gera Hol
Background and Aims: Plant growth-promoting rhizobacteria (PGPR) strains can influence plant-insect interactions. However, little is known about the effect of changes in the soil bacterial community in general and especially the loss of rare soil microbes on these interactions. Here, the influence of rare soil microbe reduction on induced systemic resistance (ISR) in a wild ecotype of Arabidopsis thaliana against the aphid Myzus persicae was investigated. Methods: To create a gradient of microbial abundances, soil was inoculated with a serial dilution of a microbial community and responses of Arabidopsis plants that originated from the same site as the soil microbes were tested...
January 10, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29327790/iron-encapsulation-in-water-in-oil-emulsions-effect-of-ferrous-sulfate-concentration-and-fat-crystal-formation-on-oxidative-stability
#13
Nattapong Prichapan, David Julian McClements, Utai Klinkesorn
Iron deficiency is a major global human health concern. Encapsulation of iron in functional food products may help to solve this problem. However, iron is highly reactive and may promote rapid lipid oxidation in fatty foods. In this study, the effect of ferrous sulfate (0.1 to 0.5 wt%) and rice bran stearin (0 or 30 wt%) on the physical properties, oxidative stability, and encapsulation efficiency of 20 wt% water-in-oil (W/O) emulsions stabilized with polyglycerol polyricinoleate was investigated. In the presence of rice bran stearin crystals in the continuous oil phase, W/O emulsions had smaller mean droplet diameters (d ∼ 250 nm) and better physical stability than its absence (d ∼ 330 nm)...
January 12, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29313197/exploiting-rhizosphere-microbial-cooperation-for-developing-sustainable-agriculture-strategies
#14
Yoann Besset-Manzoni, Laura Rieusset, Pierre Joly, Gilles Comte, Claire Prigent-Combaret
The rhizosphere hosts a considerable microbial community. Among that community, bacteria called plant growth-promoting rhizobacteria (PGPR) can promote plant growth and defense against diseases using diverse distinct plant-beneficial functions. Crop inoculation with PGPR could allow to reduce the use of pesticides and fertilizers in agrosystems. However, microbial crop protection and growth stimulation would be more efficient if cooperation between rhizosphere bacterial populations was taken into account when developing biocontrol agents and biostimulants...
January 8, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29287345/mass-spectrometric-imaging-of-localization-of-fat-molecules-in-water-in-oil-emulsions-containing-semi-solid-fat
#15
Makoto Shiota, Yuichi Shimomura, Mariko Kotera, Shu Taira
Firstly, we report the localization analysis of the lipid components of a water-in-oil (W/O) semi-solid emulsion by mass spectrometry imaging (MSI). Uniform emulsion droplets were prepared using microchannel emulsification devices with lecithin, stearic acid-binding monoglyceride (St-MAG), and polyglycerol polyricinoleate (PGPR) as emulsifiers. The mass image gives us the localization of phosphatidylcholine (PC) in lecithin, St-MAG, tripalmitin (PPP), medium-chain triglyceride (MCT), and high-melting-point triglyceride tristearin (C18-TAG)...
April 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29280555/rhizosphere-associated-alcaligenes-and-bacillus-strains-that-induce-resistance-against-blast-and-sheath-blight-diseases-enhance-plant-growth-and-improve-mineral-content-in-rice
#16
Kaleem U Kakar, Zarqa Nawaz, Zhouqi Cui, Abdulwareth A Almoneafy, Raqeeb Ullah, Qing-Yao Shu
AIMS: To examine the biocontrol activities of five rhizobacterial strains (i.e., Alcaligenes faecalis strains Bk1 and P1, Bacillus amyloliquefaciens strain Bk7, and Brevibacillus laterosporus stains B4 and S5), control the rice blast and sheath blight diseases in greenhouse, and to study their possible modes of action. METHODS AND RESULTS: Five potential plant growth promoting rhizobacterial (PGPR) strains isolated from rice rhizospheres, were tested for in vitro antifungal activities against Magnaporthe oryzae, Rhizoctonia solanii, Botrytis cinerea and Fusarium graminearum...
December 27, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29185225/imperative-roles-of-halotolerant-plant-growth-promoting-rhizobacteria-and-kinetin-in-improving-salt-tolerance-and-growth-of-black-gram-phaseolus-mungo
#17
Nasim Ahmad Yasin, Waheed Ullah Khan, Sajid Rashid Ahmad, Aamir Ali, Aqeel Ahmad, Waheed Akram
The salinity stress causes a major threat for plant growth, yield, and biomass production. The present study was designed to assess the effect of exogenously applied kinetin and halotolerant plant growth-promoting rhizobacteria (H-PGPR) on alleviation of salt stress in black gram (Phaseolus mungo). A total of 15 rhizobacterial isolates obtained from a salt-affected area were analyzed for their capability to improve growth of P. mungo plants growing in greenhouse conditions. Out of the tested rhizobacteria, the two bacterial isolates which exhibited maximum growth potential were screened and their growth-promoting attributes were evaluated...
November 28, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29180695/the-interactive-effects-of-arbuscular-mycorrhiza-and-plant-growth-promoting-rhizobacteria-synergistically-enhance-host-plant-defences-against-pathogens
#18
Alejandro Pérez-de-Luque, Stefanie Tille, Irene Johnson, David Pascual-Pardo, Jurriaan Ton, Duncan D Cameron
Belowground interactions between plant roots, mycorrhizal fungi and plant growth-promoting rhizobacteria (PGPR) can improve plant health via enhanced nutrient acquisition and priming of the plant immune system. Two wheat cultivars differing in their ability to form mycorrhiza were (co)inoculated with the mycorrhizal fungus Rhizophagus irregularis and the rhizobacterial strain Pseudomonas putida KT2440. The cultivar with high mycorrhizal compatibility supported higher levels of rhizobacterial colonization than the low compatibility cultivar...
November 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29161274/bacillus-spp-a-bio-control-agent-enhances-the-activity-of-antioxidant-defense-enzymes-in-rice-against-pyricularia-oryzae
#19
Afroz Rais, Zahra Jabeen, Faluk Shair, Fauzia Yusuf Hafeez, Muhammad Nadeem Hassan
Plant growth promoting rhizobacteria (PGPR) are found to control the plant diseases by adopting various mechanisms. Induced systemic resistance (ISR) is an important defensive strategy manifested by plants against numerous pathogens especially infecting at aerial parts. Rhizobacteria elicit ISR by inducing different pathways in plants through production of various metabolites. In the present study, potential of Bacillus spp. KFP-5, KFP-7, KFP-17 was assessed to induce antioxidant enzymes against Pyricularia oryzae infection in rice...
2017: PloS One
https://www.readbyqxmd.com/read/29146257/klebsiella-sp-confers-enhanced-tolerance-to-salinity-and-plant-growth-promotion-in-oat-seedlings-avena-sativa
#20
Swapnil Sapre, Iti Gontia-Mishra, Sharad Tiwari
Plant growth and yield is adversely affected by soil salinity. Salt tolerant plant growth-promoting rhizobacteria (PGPR) strain IG 3 was isolated from rhizosphere of wheat plants. The isolate IG 3 was able to grow in presence of NaCl ranging from 0 to 20% in Luria Bertani medium. The present study was planned to evaluate the role of inoculation of PGPR strain IG 3 and its efficacy in augmenting salt tolerance in oat (Avena sativa) under NaCl stress (100mM). The physiological parameter such as shoot length, root length, shoot dry weight, root dry weight and relative water content (RWC) were remarkably higher in IG 3 inoculated plants in comparison to un-inoculated plants under NaCl stress...
January 2018: Microbiological Research
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