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https://www.readbyqxmd.com/read/28704498/biological-control-of-heterodera-glycines-by-spore-forming-plant-growth-promoting-rhizobacteria-pgpr-on-soybean
#1
Ni Xiang, Kathy S Lawrence, Joseph W Kloepper, Patricia A Donald, John A McInroy
Heterodera glycines, the soybean cyst nematode, is the most economically important plant-parasitic nematode on soybean production in the U.S. The objectives of this study were to evaluate the potential of plant growth-promoting rhizobacteria (PGPR) strains for mortality of H. glycines J2 in vitro and for reducing nematode population density on soybean in greenhouse, microplot, and field trials. The major group causing mortality to H. glycines in vitro was the genus Bacillus that consisted of 92.6% of the total 663 PGPR strains evaluated...
2017: PloS One
https://www.readbyqxmd.com/read/28701567/correction-to-population-differences-in-olfaction-accompany-host-shift-in-drosophila-mojavensis
#2
Amber Crowley-Gall, Priya Date, Clair Han, Nicole Rhodes, Peter Andolfatto, John E Layne, Stephanie M Rollmann
No abstract text is available yet for this article.
July 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28660301/evolution-of-gstd1-in-cactophilic-drosophila
#3
Karina López-Olmos, Therese Ann Markow, Carlos A Machado
GSTD1 is an insect glutathione S-transferase that has received considerable attention because of its role in detoxification of xenobiotic compounds, specifically pesticides and plant allelochemicals involved in detoxification, or in the use of some substrates as a nutritional source. GSTD1 has been implicated in the adaptation to a new cactus host in Drosophila mojavensis and thus constitutes an interesting candidate to study ecological genetics of adaptation in Drosophila. We conducted population genetic and molecular evolution analyses of the GstD1 gene in the context of association with different cactus hosts (Opuntia sp...
June 2017: Journal of Molecular Evolution
https://www.readbyqxmd.com/read/28659292/dissecting-the-satellite-dna-landscape-in-three-cactophilic-drosophila-sequenced-genomes
#4
Leonardo G de Lima, Marta Svartman, Gustavo C S Kuhn
Eukayote genomes are replete with repetitive DNAs. This class includes tandemly repeated satellite DNAs (satDNA) which are among the most abundant, fast evolving (yet poorly studied) genomic components. Here, we used high throughput sequencing data from three cactophilic Drosophila species, D. buzzatii, D. seriema and D. mojavensis, to access and study their whole satDNA landscape. In total, the RepeatExplorer software identified five satDNAs, three previously described (pBuM, DBC-150 and CDSTR198) and two novel ones (CDSTR138 and CDSTR130)...
June 28, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28638622/the-synergistic-use-of-plant-and-isolated-bacteria-to-clean-up-polycyclic-aromatic-hydrocarbons-from-contaminated-soil
#5
S Eskandary, A Tahmourespour, M Hoodaji, A Abdollahi
BACKGROUND: Biological methods of polycyclic aromatic hydrocarbons (PAH) contamination elimination typically involve the transformation of contaminants to non-toxic materials by microorganisms and plants and appear to be the most effective methods available. METHODS: In this study, Bacillus licheniformis and Bacillus mojavensis isolated from oil-contaminated soils were inoculated onto Festuca arundinacea seeds before planting in the pot and 3 weeks after planting by syringe injection into the rhizospheric zone in order to study the elimination of PAHs from Festuca's rhizosphere in the greenhouse...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28616178/population-differences-in-host-plant-preference-and-the-importance-of-yeast-and-plant-substrate-to-volatile-composition
#6
Priya Date, Amber Crowley-Gall, Aaron F Diefendorf, Stephanie M Rollmann
Divergent selection between environments can result in changes to the behavior of an organism. In many insects, volatile compounds are a primary means by which host plants are recognized and shifts in plant availability can result in changes to host preference. Both the plant substrate and microorganisms can influence this behavior, and host plant choice can have an impact on the performance of the organism. In Drosophila mojavensis, four geographically isolated populations each use different cacti as feeding and oviposition substrates and identify those cacti by the composition of the volatile odorants emitted...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28541576/rapidly-evolving-toll-3-4-genes-encode-male-specific-toll-like-receptors-in-drosophila
#7
Tera C Levin, Harmit S Malik
Animal Toll-like receptors (TLRs) have evolved through a pattern of duplication and divergence. Whereas mammalian TLRs directly recognize microbial ligands, Drosophila Tolls bind endogenous ligands downstream of both developmental and immune signaling cascades. Here, we find that most Toll genes in Drosophila evolve slowly with little gene turnover (gains/losses), consistent with their important roles in development and indirect roles in microbial recognition. In contrast, we find that the Toll-3/4 genes have experienced an unusually rapid rate of gene gains and losses, resulting in lineage-specific Toll-3/4s and vastly different gene repertoires among Drosophila species, from zero copies (e...
May 25, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28330259/identification-of-endophytic-bacillus-mojavensis-with-highly-specialized-broad-spectrum-antibacterial-activity
#8
B Jasim, S Sreelakshmi, Jyothis Mathew, E K Radhakrishnan
Biosynthetic adaptation of endophytic bacteria to chemically support host plant is very remarkable. Hence these organisms from medicinal plants are considered as highly valuable sources for natural products with diverse bioactivity. Their metabolite diversity and biosynthetic versatility have been increasingly explored for drug discovery. In this study, an endophytic Bacillus mojavensis with broad spectrum antibacterial properties has been analyzed for the chemical basis of its activity. By LC-MS/MS the organism was identified to have the biosynthetic ability to produce lipopeptides surfactin and fengycin...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28204884/selection-of-bacillus-species-for-targeted-in-situ-release-of-prebiotic-galacto-rhamnogalacturonan-from-potato-pulp-in-piglets
#9
Carsten Jers, Mikael L Strube, Mette D Cantor, Bea K K Nielsen, Ole B Sørensen, Mette Boye, Anne S Meyer
We have previously shown that galacto-rhamnogalacturonan fibers can be enzymatically extracted from potato pulp and that these fibers have potential for exerting a prebiotic effect in piglets. The spore-forming Bacillus species are widely used as probiotics in feed supplements for pigs. In this study, we evaluated the option for further functionalizing Bacillus feed supplements by selecting strains possessing the enzymes required for extraction of the potentially prebiotic fibers. We established that it would require production and secretion of pectin lyase and/or polygalacturonase but no or limited secretion of galactanase and β-galactosidase...
May 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28116058/effects-of-temperature-on-transcriptome-and-cuticular-hydrocarbon-expression-in-ecologically-differentiated-populations-of-desert-drosophila
#10
William J Etges, Cássia C de Oliveira, Subhash Rajpurohit, Allen G Gibbs
We assessed the effects of temperature differences on gene expression using whole-transcriptome microarrays and cuticular hydrocarbon variation in populations of cactophilic Drosophila mojavensis. Four populations from Baja California and mainland Mexico and Arizona were each reared on two different host cacti, reared to sexual maturity on laboratory media, and adults were exposed for 12 hr to 15, 25, or 35°C. Temperature differences influenced the expression of 3,294 genes, while population differences and host plants affected >2,400 each in adult flies...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28091568/identification-of-misexpressed-genetic-elements-in-hybrids-between-drosophila-related-species
#11
Hélène Lopez-Maestre, Elias A G Carnelossi, Vincent Lacroix, Nelly Burlet, Bruno Mugat, Séverine Chambeyron, Claudia M A Carareto, Cristina Vieira
Crosses between close species can lead to genomic disorders, often considered to be the cause of hybrid incompatibility, one of the initial steps in the speciation process. How these incompatibilities are established and what are their causes remain unclear. To understand the initiation of hybrid incompatibility, we performed reciprocal crosses between two species of Drosophila (D. mojavensis and D. arizonae) that diverged less than 1 Mya. We performed a genome-wide transcriptomic analysis on ovaries from parental lines and on hybrids from reciprocal crosses...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27856038/tolerance-and-bioaccumulation-of-u-vi-by-bacillus-mojavensis-and-its-solid-phase-preconcentration-by-bacillus-mojavensis-immobilized-multiwalled-carbon-nanotube
#12
Sadin Özdemir, M Kadir Oduncu, Ersin Kilinc, Mustafa Soylak
In this study, uranium(VI) tolerance and bioaccumulation were investigated by using thermo -tolerant Bacillus mojavensis. The level of U(VI) was measured by UV-VIS spectrophotometry. The minimum inhibition concentration (MIC) value of U(VI) was experimented. Bacterial growth was not affected in the presence of 1.0 and 2.5 mg/L U(VI) at 36 h and the growth was partially affected in the presence of 5 mg/L U(VI) at 24 h. What was obtained from this study is that there was diversity in the various periods of the growth phases of metal bioaccumulation capacity, which was shown by B...
February 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/27792456/antimicrobial-activity-and-chemical-composition-of-three-essential-oils-extracted-from-mediterranean-aromatic-plants
#13
Hazem S Elshafie, Shimaa Sakr, Stefania M Mang, Sandra Belviso, Vincenzo De Feo, Ippolito Camele
There is a growing interest in essential oils (EOs) as possible alternatives for traditional chemical pesticides. This study was carried out to characterize the chemical composition of the three EOs extracted from Verbena officinalis, Majorana hortensis, and Salvia officinalis using gas chromatography (GC) and GC-mass spectrometry (GC-MS) and to evaluate in vitro their efficacy against some phyto or human pathogens. The antifungal activity was investigated against Colletotrichum acutatum and Botrytis cinerea in comparison with Azoxystrobin as a large spectrum fungicide...
November 2016: Journal of Medicinal Food
https://www.readbyqxmd.com/read/27687995/screening-of-novel-bacteria-for-the-2-3-butanediol-production
#14
Malee Kallbach, Sonja Horn, Anja Kuenz, Ulf Prüße
Biotechnologically produced 2,3-butanediol (2,3-BDO) is a potential starting material for industrial bulk chemicals such as butadiene or methyl ethyl ketone which are currently produced from fossil feedstocks. So far, the highest 2,3-BDO concentrations have been obtained with risk group 2 microorganisms. In this study, three risk group 1 microorganisms are presented that are so far unknown for an efficient production of 2,3-BDO. The strains Bacillus atrophaeus NRS-213, Bacillus mojavensis B-14698, and Bacillus vallismortis B-14891 were evaluated regarding their ability to produce high 2,3-BDO concentrations with a broad range of different carbon sources...
February 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27581882/population-differences-in-olfaction-accompany-host-shift-in-drosophila-mojavensis
#15
Amber Crowley-Gall, Priya Date, Clair Han, Nicole Rhodes, Peter Andolfatto, John E Layne, Stephanie M Rollmann
Evolutionary shifts in plant-herbivore interactions provide a model for understanding the link among the evolution of behaviour, ecological specialization and incipient speciation. Drosophila mojavensis uses different host cacti across its range, and volatile chemicals emitted by the host are the primary cue for host plant identification. In this study, we show that changes in host plant use between distinct D. mojavensis populations are accompanied by changes in the olfactory system. Specifically, we observe differences in olfactory receptor neuron specificity and sensitivity, as well as changes in sensillar subtype abundance, between populations...
August 31, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27537213/bacillus-mojavensis-rrc101-lipopeptides-provoke-physiological-and-metabolic-changes-during-antagonism-against-fusarium-verticillioides
#16
A A Blacutt, T R Mitchell, C W Bacon, S E Gold
The mycotoxigenic pathogen Fusarium verticillioides threatens the quality and utility of maize across industrial and agricultural purposes. Chemical control is complicated by the intimate endophytic lifestyle of the pathogen with its host. Bacillus mojavensis RRC101, a maize-endophytic bacterium, has been observed to reduce F. verticillioides disease severity and fumonisin accumulation when coinoculated to maize. Genome sequencing and annotation identified a number of biocontrol-relevant pathways in RRC101...
October 4, 2016: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/27519246/the-role-of-phytosterols-in-host-plant-utilization-by-cactophilicdrosophila
#17
J C Fogleman, S M Duperret, H W Kircher
The Cactus-Drosophila Model System of the Sonoran Desert consists of four endemic species ofDrosophila (D. mojavensis, D. nigrospiracula, D. mettleri andD. pachea) and five species of columnar cacti (agria, organpipe, saguaro, cardón and senita). Extensive collection records indicate that each cactus species has only one species ofDrosophila as the primary resident. The elimination of six of the twenty possible random combinations ofDrosophila species and cactus species can be attributed directly to phytosterols...
January 1986: Lipids
https://www.readbyqxmd.com/read/27512614/genomic-and-expression-analysis-of-transition-proteins-in-drosophila
#18
Zain A Alvi, Tin-Chun Chu, Valerie Schawaroch, Angela V Klaus
The current study was aimed at analyzing putative protein sequences of the transition protein-like proteins in 12 Drosophila species based on the reference sequences of transition protein-like protein (Tpl (94D) ) expressed in Drosophila melanogaster sperm nuclei. Transition proteins aid in transforming chromatin from a histone-based nucleosome structure to a protamine-based structure during spermiogenesis - the post-meiotic stage of spermatogenesis. Sequences were obtained from NCBI Ref-Seq database using NCBI ORF-Finder (PSI-BLAST)...
September 2015: Spermatogenesis
https://www.readbyqxmd.com/read/27489210/genome-evolution-in-three-species-of-cactophilic-drosophila
#19
Alejandro Sanchez-Flores, Fernando Peñaloza, Javier Carpinteyro-Ponce, Nestor Nazario-Yepiz, Cei Abreu-Goodger, Carlos A Machado, Therese Ann Markow
We report genomes of two species of cactophilic Drosophila: Drosophila arizonae and D. navojoa These two are the closest relatives of D. mojavensis, forming the D. mojavensis cluster. D. mojavensis and D. arizonae diverged from D. navojoa ∼5.8 Mya, while the split between D. arizonae and D. mojavensis is more recent, at 1.5 Mya. Together the three genomes provide opportunities to examine genomic changes associated with speciation and host shifts in this ecologically defined group of flies. The three species are also separated by fixed inversion differences in three of their six chromosomes...
October 13, 2016: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27212608/enrichment-and-identification-of-biosurfactant-producing-oil-field-microbiota-utilizing-electron-acceptors-other-than-oxygen-and-nitrate
#20
Yuriy Kryachko, Diana Semler, John Vogrinetz, Markus Lemke, Matthew G Links, E Luke McCarthy, Brenda Haug, Sean M Hemmingsen
Microorganisms indigenous to an oil reservoir were grown in media containing either sucrose or proteins in four steel vessels under anoxic conditions at 30°C and 8.3MPa for 30days, to enrich biosurfactant producers. Fermentation of substrate was possible in the protein-containing medium and either fermentation or respiration through reduction of sulfate occurred in the sucrose-containing medium. Growth of microorganisms led to 3.4-5.4-fold surface tension reduction indicating production of biosurfactants in amounts sufficient for enhancement of gas-driven oil recovery...
August 10, 2016: Journal of Biotechnology
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