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a comparative study on the potential of epiphytic yeasts isolated from tropical fruits to produce flavoring compounds.in recent years, there has been an increasing interest in identifying and characterizing the yeast flora associated with diverse types of habitat because of the many potential desirable technological properties of these microorganisms, especially in food applications. in this study, a total of 101 yeast strains were isolated from the skins of tropical fruits collected in several locations in the south west indian ocean. sequence analysis of the d1/d2 domains of the large subunit (lsu) ribosomal ...201525802220
rhodotorula mucilaginosa skin infection in a patient treated with sorafenib. 201524628665
draft genome sequence of rhodotorula mucilaginosa, an emergent opportunistic pathogen.rhodotorula mucilaginosa, a yeast with valuable biotechnological features, has also been recorded as an emergent opportunistic pathogen that might cause disease in both immunocompetent and immunocompromised individuals. here, we report the draft genome sequence of r. mucilaginosa strain c2.5t1, which was isolated from cacao seeds in cameroon.201525858834
in vitro antifungal susceptibilities of isolates of candida spp. and aspergillus spp. from china to nine systemically active antifungal agents: data from the sentry antifungal surveillance program, 2010 through 2012.we report the in vitro activity of nine systemically active antifungal agents against 237 contemporary clinical isolates of yeast and moulds obtained from 13 laboratories in china during 2010 through 2012. susceptibility testing was performed using clsi methods. sequencing of fks hot spots was performed for echinocandin non-wild-type (wt) strains. isolates included 220 from eight species of candida, 15 from four species of aspergillus and one isolate each of rhodotorula mucilaginosa and trichosp ...201525727853
purification and characterization of a novel cold-adapted phytase from rhodotorula mucilaginosa strain jmuy14 isolated from antarctic.a yeast producing a cold-adapted phytase was isolated from antarctic deep-sea sediment and identified as a rhodotorula mucilaginosa strain jmuy14 of basidiomycetous yeasts. it was cultured in fermentation optimized by a response surface methodology based on the box-behnken design. the maximum activity of phytase reached 205.447 u ml(-1), which was close to the predicted value of 201.948 u ml(-1) and approximately 3.4 times higher than its initial activity. the extracellular phytase was purified ...201525727311
interplay between carotenoids, hemoproteins and the "life band" origin studied in live rhodotorula mucilaginosa cells by means of raman microimaging.raman microimaging of live rhodotorula mucilaginosa cells, cultured under aerobic and anaerobic conditions, showed striking differences in the composition and distribution of cell components. the analysis of these differences and recovery of oxidative phosphorylation upon environmental changes enabled the interrelation of carotenoids, hemoproteins and the unknown species considered as the "raman signature of life".201525654139
production, purification, and characterization of an extracellular acid protease from the marine antarctic yeast rhodotorula mucilaginosa l7.the production, purification, and characterization of an extracellular protease released by rhodotorula mucilaginosa l7 were evaluated in this study. this strain was isolated from an antarctic marine alga and previously selected among others based on the capacity to produce the highest extracellular proteolytic activity in preliminary tests. r. mucilaginosa l7 was grown in saboraud-dextrose medium at 25 °c, and the cell growth, ph of the medium, extracellular protease production and the glucose ...201526466885
biotechnological methods for chalcone reduction using whole cells of lactobacillus, rhodococcus and rhodotorula strains as a way to produce new derivatives.microbial strains of the genera dietzia, micrococcus, pseudomonas, rhodococcus, gordonia, streptomyces, pseudomonas, bacillus, penicillium, rhodotorula and lactobacillus were screened for the ability to convert chalcones. synthesis of chalcones was performed by the claisen-schmidt reaction. there were three groups of chalcones obtained as the products, which included the derivatives containing 4-substituted chalcone, 2'-hydroxychalcone and 4'-methoxychalcone. the b ring of the chalcones was subs ...201627209040
[effect of invasive herb species on the structure of soil yeast complexes in mixed forests exemplified by impatiens parviflora dc].yeast abundance and diversity in a mixed forest sod-podzol soil under impatiens parviflora dc plants was studied in comparison with unimpaired aboriginal herbaceous plants typical of the mid-russian secondary, after-forest meadow. the study was carried out throughout the vegetation period. standard microbiological plating techniques revealed 36 yeast species. typical pedobiotic (cryptococcus podzolicus, wickerhamomyces anomalus) and eurybiotic yeast species (rhodotorula mucilaginosa) predominate ...201627169249
rhodotorula fungemia: report of two cases in sfax (tunisia).rhodotorula is emerging as an important cause of nosocomial and opportunistic infections. we present two cases of rhodotorula mucilaginosa fungemia diagnosed at our hospital during the last decade. the first case was of a term neonate who presented congenital heart disease (interventricular communication) and body dysmorphic disorder. he was admitted for respiratory failure and sepsis. the second case involved in a 33-year-old woman that had hodgkinien lymphoma associated to tuberculosis. identi ...201627091581
rhodotorula mucilaginosa fungemia and pleural tuberculosis in an immunocompetent patient: an uncommon association.we report an atypical case of rhodotorula mucilaginosa fungemia coexisting with pleural tuberculosis, in an immunocompetent host. the patient was an inhaled drug abuser and worked in a fruit market. the diagnosis of rhodotorula mucilaginosa infection was established by the isolation of the yeast in two blood cultures followed by a good response to amphotericin b treatment. persistent evening fever and pleural effusion led to the second diagnosis-pleural tuberculosis. in the last 5 years, this wa ...201626369644
diversity of yeasts associated with the sea surface microlayer and underlying water along the northern coast of taiwan.yeast communities inhabiting the sea surface microlayer (ssml) on the northern coast of taiwan were examined using a cultivation method and compared with those inhabiting the underlying water (uw) at a 50-cm depth. culturable yeasts were recovered from the ssml and uw samples collected in the morning during 4 field campaigns, and 420 strains were isolated. the 420 isolates were grouped into 43 species using a polyphasic molecular approach, including sequence analysis of the 26s rdna d1/d2 domain ...201626343982
a new and effective approach to boron removal by using novel boron-specific fungi isolated from boron mining wastewater.boron-resistant fungi were isolated from the wastewater of a boron mine in turkey. boron removal efficiencies of penicillium crustosum and rhodotorula mucilaginosa were detected in different media compositions. minimal salt medium (msm) and two different waste media containing molasses (wm-1) or whey + molasses (wm-2) were tested to make this process cost effective when scaled up. both isolates achieved high boron removal yields at the highest boron concentrations tested in msm and wm-1. the max ...201626877036
metal-induced production of a novel bioadsorbent exopolysaccharide in a native rhodotorula mucilaginosa from the mexican northeastern region.there is a current need to develop low-cost strategies to degrade and eliminate industrially used colorants discharged into the environment. colorants discharged into natural water streams pose various threats, including: toxicity, degradation of aesthetics and inhibiting sunlight penetration into aquatic ecosystems. dyes and colorants usually have complex aromatic molecular structures, which make them very stable and difficult to degrade and eliminate by conventional water treatment systems. th ...201626828867
marine fungi isolated from chilean fjord sediments can degrade oxytetracycline.salmon farming is the main economic activity in the fjords area of southern chile. this activity requires the use of antibiotics, such as oxytetracycline, for the control and prevention of diseases, which have a negative impact on the environment. we analyzed the abilities of endemic marine fungi to biodegrade oxytetracycline, an antibiotic used extensively in fish farming. we isolated marine fungi strains from sediment samples obtained from an area of fish farming activity. the five isolated st ...201627418075
[fungal peritonitis due to rhodotorula mucilaginosa in a patient with automated peritoneal dialysis: literature review].fungal peritonitis is a major complication of peritoneal dialysis associated with high mortality. most survivors have a high rate of abandonment of peritoneal dialysis. we report a case of fungal peritonitis due to an unusual agent. an 83 year-old woman, with a history of type 2 diabetes mellitus and multiple episodes of bacterial peritonitis associated to technical flaws in the implementation of automated peritoneal dialysis, was admitted due to abdominal pain and cloudy peritoneal fluid. rhodo ...201627315000
rhodotorula mucilaginosa as a cause of recurrent pulmonary infection and liver infiltration in a patient with cll. 201627299637
proteomic analysis of an environmental isolate of rhodotorula mucilaginosa after arsenic and cadmium challenge: identification of a protein expression signature for heavy metal exposure.a metal-resistant rhodotorula mucilaginosa strain was isolated from an industrial wastewater. effects on reduced/oxidized glutathione (gssg/gsh), antioxidant enzymes and proteome were assessed on metal challenge (100mg/l). increased gsh (mm/g) was found with cdcl2 (18.43±3.34), naaso2 (14.76±2.14), cuso4 (14.73±2.49), and pb(no3)2 (15.74±5.3) versus control (7.67±0.95). gsh:gssg ratio decreased with cdcl2, naaso2, and pb(no3)2 but not with cuso4 and cysteine-containing protein levels increased w ...201627090762
chitin enhances biocontrol of rhodotorula mucilaginosa to postharvest decay of peaches.biological control using microbial antagonists is a promising alternative approach to synthetic fungicides. however, effective biological control requires enhancing the consistency and efficacy of the antagonists used to control postharvest diseases. this study investigated the effect of chitin on the biocontrol efficacy of rhodotorula mucilaginosa against blue mold and rhizopus decay of peaches and on the protein expression profiles of r. mucilaginosa. the antagonistic activity of r. mucilagino ...201627064085
proteomic analysis of rhodotorula mucilaginosa: dealing with the issues of a non-conventional yeast.red yeasts ascribed to the species rhodotorula mucilaginosa are gaining increasing attention, due to their numerous biotechnological applications, spanning carotenoid production, liquid bioremediation, heavy metal biotransformation and antifungal and plant growth-promoting actions, but also for their role as opportunistic pathogens. nevertheless, their characterization at the 'omic' level is still scarce. here, we applied different proteomic workflows to r. mucilaginosa with the aim of assessing ...201626987668
isolation and characterization of yeasts associated with plants growing in heavy-metal- and arsenic-contaminated soils.yeasts were quantified and isolated from the rhizospheres of 5 plant species grown at 2 sites of a mexican region contaminated with arsenic, lead, and other heavy metals. yeast abundance was about 10(2) cfu/g of soil and 31 isolates were obtained. on the basis of the phylogenetic analysis of 26s rrna and internal transcribed spacer fragment, 6 species were identified within the following 5 genera: cryptococcus (80.64%), rhodotorula (6.45%), exophiala (6.45%), trichosporon (3.22%), and cystobasid ...201626936448
cultivation of oleaginous rhodotorula mucilaginosa in airlift bioreactor by using seawater.the enormous water resource consumption is a concern to the scale-up fermentation process, especially for those cheap fermentation commodities, such as microbial oils as the feedstock for biodiesel production. the direct cultivation of oleaginous rhodotorula mucilaginosa in a 5-l airlift bioreactor using seawater instead of pure water led to a slightly lower biomass being achieved, at 17.2 compared to 18.1 g/l, respectively. nevertheless, a higher lipid content of 65 ± 5% was measured in the bat ...201626319611
tolerance to ultraviolet radiation of psychrotolerant yeasts and analysis of their carotenoid, mycosporine, and ergosterol content.yeasts colonizing the antarctic region are exposed to a high ultraviolet radiation evolving mechanisms to minimize the uv radiation damages, such as the production of uv-absorbing or antioxidant compounds like carotenoid pigments and mycosporines. ergosterol has also been suggested to play a role in this response. these compounds are also economically attractive for several industries such as pharmaceutical and food, leading to a continuous search for biological sources of them. in this work, th ...201626483082
a novel extracellular glycosidase activity from rhodotorula mucilaginosa: its application potential in wine aroma enhancement.the aim of the work was to evaluate the application potential of a glycosidase extract of one indigenous non-saccharomyces strain in wine aroma enhancement. the isolate was selected from a local winemaking region in china for its high β-glucosidase level and was identified as rhodotorula mucilaginosa. the tolerance of the glycosidase extract to the typical winemaking conditions was assessed using the activity of its β-glucosidase. after that, the hydrolysis capacity of r. mucilaginosa glycosidas ...201626606736
antimicrobial activity of xanthohumol and its selected structural analogues.the objective of this study was to evaluate the antimicrobial activity of structural analogues of xanthohumol 1, a flavonoid compound found in hops (humulus lupulus). the agar-diffusion method using filter paper disks was applied. biological tests performed for selected strains of gram-positive (staphylococcus aureus) and gram-negative (escherichia coli) bacteria, fungi (alternaria sp.), and yeasts (rhodotorula rubra, candida albicans) revealed that compounds with at least one hydroxyl group-all ...201627187329
synthesis and antifungal activity of some 4,6-dimethylisoxazolo[3,4- b]pyridin-3(1h)-one derivatives.cutaneous and invasive fungal infections are constant threats to human health that substantiate the need for the development of new efficacious and safe antimycotics.201627184263
in vitro antimicrobial activity of spices and medicinal herbs against selected microbes associated with juices.in the present investigation, comparison of antimicrobial activities of different spices, curcuma longa, zingiber officinale, and mentha arvensis, and medicinal herbs, such as withania somnifera, rauvolfia serpentina, emblica officinalis, terminalia arjuna, and centella asiatica, was evaluated. different extraction solvents (acetone, methanol, ethanol, and water) were used and extracts were examined against bacillus cereus, serratia sp., rhodotorula mucilaginosa, aspergillus flavus, and penicill ...201626880927
engineering of corynebacterium glutamicum for xylitol production from lignocellulosic pentose sugars.xylitol is a non-fermentable sugar alcohol used as sweetener. corynebacterium glutamicum atcc13032 was metabolically engineered for xylitol production from the lignocellulosic pentose sugars xylose and arabinose. direct conversion of xylose to xylitol was achieved through the heterologous expression of nad(p)h-dependent xylose reductase (xr) gene from rhodotorula mucilaginosa. xylitol synthesis from arabinose was attained through polycistronic expression of l-arabinose isomerase (araa), d-psicos ...201627184428
stereoselective yeast-mediated reduction of trans-5-(1'-oxo-3'-methylbutyl)-3-methyldihydrofuran-2-one: production of chiral intermediates for the synthesis of β-secretase inhibitors.to investigate the usefulness of yeast strains to the production of chiral hydroxylactones, important synthons in the synthesis of β-secretase inhibitors.201626354855
lipids, hemoproteins and carotenoids in alive rhodotorula mucilaginosa cells under pesticide decomposition - raman imaging study.various species of yeasts are gaining attention as producers of nutraceuticals and biofuels and due to their capacity to biodegrade chemical waste. rhodotorula mucilaginosa is one of the most oleaginous species of yeast, an efficient de novo carotenoid producer and was reported to be capable of decomposing of organic pesticides. in this work we studied the influence of a toxic pesticide, diazinone, on production of storage (lipids) and protective (carotenoids, hemoproteins) compounds by rh. muci ...201627568366
improvement in extracellular protease production by the marine antarctic yeast rhodotorula mucilaginosa l7.microorganisms from extreme and restrictive eco systems, such as the antarctic continent, are of great interest due to their ability to synthesize products of commercial value. among these, enzymes from psychrotolerant and psychrophilic microorganisms offer potential economical benefits due to their high activity at low and moderate temperatures. the cold adapted yeast rhodotorula mucilaginosa l7 was selected out of 97 yeasts isolated from antarctica as having the highest extracellular proteolyt ...201627474110
azole resistance in candida spp. isolated from catú lake, ceará, brazil: an efflux-pump-mediated mechanism.since, there is no study reporting the mechanism of azole resistance among yeasts isolated from aquatic environments; the present study aims to investigate the occurrence of antifungal resistance among yeasts isolated from an aquatic environment, and assess the efflux-pump activity of the azole-resistant strains to better understand the mechanism of resistance for this group of drugs. for this purpose, monthly water and sediment samples were collected from catú lake, ceará, brazil, from march 20 ...201626887224
fungemia due to rare opportunistic yeasts: data from a population-based surveillance in spain.fungemia due to rare yeasts constitutes an emerging but poorly investigated condition. data on risk factors, clinical features, therapy, and outcome of episodes of fungemia due to rare (non-candida, non-cryptococcus) yeasts were analyzed in a population-based surveillance program conducted in 29 spanish hospitals between may 2010 and april 2011. species identification (dna sequencing) and antifungal susceptibility testing (eucast and clsi methods) were centrally performed. fourteen out of 767 ep ...201628339535
correction: metal-induced production of a novel bioadsorbent exopolysaccharide in a native rhodotorula mucilaginosa from the mexican northeastern region. 201626914493
potential of glycosidase from non-saccharomyces isolates for enhancement of wine aroma.the aim of this work was to rapidly screen indigenous yeasts with high levels of β-glucosidase activity and assess the potential of glycosidase extracts for aroma enhancement in winemaking. a semiquantitative colorimetric assay was applied using 96-well plates to screen yeasts from 3 different regions of china. isolates with high β-glucosidase activity were confirmed by the commonly used pnp assay. among 493 non-saccharomyces isolates belonging to 8 generas, 3 isolates were selected for their hi ...201626954887
the black yeast exophiala dermatitidis and other selected opportunistic human fungal pathogens spread from dishwashers to kitchens.we investigated the diversity and distribution of fungi in nine different sites inside 30 residential dishwashers. in total, 503 fungal strains were isolated, which belong to 10 genera and 84 species. irrespective of the sampled site, 83% of the dishwashers were positive for fungi. the most frequent opportunistic pathogenic species were exophiala dermatitidis, candida parapsilosis sensu stricto, exophiala phaeomuriformis, fusarium dimerum, and the saprochaete/magnusiomyces clade. the black yeast ...201626867131
augmentation of a microbial consortium for enhanced polylactide (pla) degradation.bioplastics are eco-friendly and derived from renewable biomass sources. innovation in recycling methods will tackle some of the critical issues facing the acceptance of bioplastics. polylactic acid (pla) is the commonly used and well-studied bioplastic that is presumed to be biodegradable. considering their demand and use in near future, exploration for microbes capable of bioplastic degradation has high potential. four pla degrading strains were isolated and identified as penicillium chrysogen ...201626843697
effects of different culture media on biodegradation of triclosan by rhodotorula mucilaginosa and penicillium sp.triclosan is an antimicrobial agent and a persistent pollutant. the biodegradation of triclosan is dependent on many variables including the biodegradation organism and the environmental conditions. here, we evaluated the triclosan degradation potential of two fungi strains, rhodotorula mucilaginosa and penicillium sp., and the rate of its turnover to 2,4-dichlorophenol (2,4-dcp). both of these strains showed less susceptibility to triclosan when grown in minimal salt medium. in order to further ...201727438253
evaluation of aroma enhancement for "ecolly" dry white wines by mixed inoculation of selected rhodotorula mucilaginosa and saccharomyces cerevisiae.to improve the aroma profile of ecolly dry white wine, the simultaneous and sequential inoculations of selected rhodotorula mucilaginosa and saccharomyces cerevisiae were performed in wine making of this work. the two yeasts were mixed in various ratios for making the mixed inoculum. the amount of volatiles and aroma characteristics were determined the following year. mixed fermentation improved both the varietal and fermentative aroma compound composition, especially that of (z)-3-hexene-1-ol, ...201728317762
hg tolerance and biouptake of an isolated pigmentation yeast rhodotorula mucilaginosa.a pigmented yeast r1 with strong tolerance to hg2+ was isolated. phylogenetic identification based on the analysis of 26s rdna and its revealed r1 is a rhodotorula mucilaginosa species. r1 was able to grow in the presence of 80 mg/l hg2+, but the lag phase was much prolonged compared to its growth in the absence of hg2+. the maximum hg2+ binding capacity of r1 was 69.9 mg/g, and dead cells could bind 15% more hg2+ than living cells. presence of organic substances drastically reduced bioavailabil ...201728253367
lipids of rhodotorula mucilaginosa iipl32 with biodiesel potential: oil yield, fatty acid profile, fuel properties.this study analyzes the single cell oil (sco), fatty acid profile, and biodiesel fuel properties of the yeast rhodotorula mucilaginosa iipl32 grown on the pentose fraction of acid pre-treated sugarcane bagasse as a carbon source. the yeast biomass from nitrogen limiting culture conditions (15.3 g l(-1) ) was able to give the sco yield of 0.17 g g(-1) of xylose consumed. acid digestion, cryo-pulverization, direct in situ transesterification, and microwave assisted techniques were evaluated in com ...201728155998
fungemia due to rare opportunistic yeasts: data from a population-based surveillance in spain.fungemia due to rare yeasts constitutes an emerging but poorly investigated condition. data on risk factors, clinical features, therapy, and outcome of episodes of fungemia due to rare (non-candida, non-cryptococcus) yeasts were analyzed in a population-based surveillance program conducted in 29 spanish hospitals between may 2010 and april 2011. species identification (dna sequencing) and antifungal susceptibility testing (eucast and clsi methods) were centrally performed. fourteen out of 767 ep ...201727495321
degradation capacities of bacteria and yeasts isolated from the gut of dendroctonus rhizophagus (curculionidae: scolytinae).bark beetles (curculionidae: scolytinae) feed on the xylem and phloem of their host, which are composed of structural carbohydrates and organic compounds that are not easily degraded by the insects. some of these compounds might be hydrolyzed by digestive enzymes produced by microbes present in the gut of these insects. in this study, we evaluated the enzymatic capacity of bacteria (acinetobacter lwoffii, arthrobacter sp., pseudomonas putida, pseudomonas azotoformans, and rahnella sp.) and yeast ...201727544667
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