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https://www.readbyqxmd.com/read/28214272/fungal-monitoring-of-the-indoor-air-of-the-museo-de-la-plata-herbarium-argentina
#1
Andrea C Mallo, Lorena A Elíades, Daniela S Nitiu, Mario C N Saparrat
BACKGROUND: Biological agents, such as fungal spores in the air in places where scientific collections are stored, can attack and deteriorate them. AIMS: The aim of this study was to gather information on the indoor air quality of the Herbarium of Vascular Plants of the Museo de Ciencias Naturales de La Plata, Argentina, in relation to fungal propagules and inert particles. METHODS: This study was made using a volumetric system and two complementary sampling methods: (1) a non-viable method for direct evaluation, and (2) a viable method by culture for viable fungal propagules...
February 14, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28213136/systematic-development-of-a-two-stage-fed-batch-process-for-lipid-accumulation-in-rhodotorula-glutinis
#2
Eric Lorenz, Dennis Runge, Anna-Maria Marbà-Ardébol, Maximilian Schmacht, Ulf Stahl, Martin Senz
The application of oleaginous yeast cells as feed supplement, for instance in aqua culture, can be a meaningful alternative for fish meal and oil additives. Therefore, a two-stage fed-batch process split into growth and lipogenesis phase was systematically developed to enrich the oleaginous yeast Rhodotorula glutinis Rh-00301 with high amounts of lipids at industrial relevant biomasses. Thereby, the different carbon sources glucose, sucrose and glycerol were investigated concerning their abilities to serve as a suited raw material for growth and/or lipid accumulation...
February 14, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28168314/cocoa-butter-like-lipid-production-ability-of-non-oleaginous-and-oleaginous-yeasts-under-nitrogen-limited-culture-conditions
#3
Yongjun Wei, Verena Siewers, Jens Nielsen
Cocoa butter (CB) extracted from cocoa beans is the main raw material for chocolate production. However, growing chocolate demands and limited CB production has resulted in a shortage of CB supply. CB is mainly composed of three different kinds of triacylglycerols (TAGs), POP (C16:0-C18:1-C16:0), POS (C16:0-C18:1-C18:0), and SOS (C18:0-C18:1-C18:0). The storage lipids of yeasts, mainly TAGs, also contain relative high-level of C16 and C18 fatty acids and might be used as CB-like lipids (CBL). In this study, we cultivated six different yeasts, including one non-oleaginous yeast strain, Saccharomyces cerevisiae CEN...
February 6, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28155998/lipids-of-rhodotorula-mucilaginosa-iipl32-with-biodiesel-potential-oil-yield-fatty-acid-profile-fuel-properties
#4
Mahesh Khot, Debashish Ghosh
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 comparison to the Soxhlet extraction for the total intracellular yeast lipid recovery...
February 3, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28144888/characterization-and-robust-nature-of-newly-isolated-oleaginous-marine-yeast-rhodosporidium-spp-from-coastal-water-of-northern-china
#5
Qiuzhen Wang, Yan Cui, Biswarup Sen, Wenmeng Ma, Rose Lynn Zheng, Xianhua Liu, Guangyi Wang
A total of ten marine yeast strains isolated from Bohai Sea, Northern China were identified to be members of three genera Rhodosporidium, Rhodotorula, and Cryptococcus. Two representative strains Rhodosporidium TJUWZ4 and Cryptococcus TJUWZA11 with high lipid content based on Nile red staining method were further characterized. A wide range of culture conditions (C and N sources, pH, temperature, salinity and C/N ratio) were tested to characterize the biomass and lipid production (yield and productivity) of these strains...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28030920/sandpits-as-a-reservoir-of-potentially-pathogenic-fungi-for-children
#6
Anna Wójcik, Joanna Błaszkowska, Piotr Kurnatowski, Katarzyna Góralska
INTRODUCTION AND OBJECTIVE: Fungi belonging to various physiological and morphological groups present in the environment are potential human pathogens. Some of them are considered as emerging pathogens. Therefore, their presence in children's playgrounds should be regarded as health risk factor. MATERIALS AND METHOD: Sixty-eight samples of sand collected from 17 sandpits of different localities in Łódź, Poland, in autumn 2010 and 2011, and in spring 2011 and 2012 were evaluated...
23, 2016: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/27940464/determination-of-fungal-community-diversity-in-fresh-and-traditional-chinese-fermented-pepper-by-pyrosequencing
#7
Lingyan Zhao, Yong Li, Liwen Jiang, Fangming Deng
Fermented pepper is one of the traditional Chinese fermented vegetables. The production mainly relies on the fermentation by natural microorganisms. This fermentation system is a unique and dynamic microecological environment, and involved microbial communities are very complex. In this study, 454 pyrosequencing was first used to investigate the fungal communities in fresh pepper and different fermentation phases. The results showed that fungal communities in fresh pepper (sample M_0) were more abundant than later fermented phases...
December 2016: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/27931081/presence-and-distribution-of-yeasts-in-the-reproductive-tract-of-healthy-female-horses
#8
A Azarvandi, A R Khosravi, H Shokri, M Talebkhan Garoussi, F Gharahgouzlou, G Vahedi, A Sharifzadeh
BACKGROUND: Yeasts are commensal organisms found in the reproductive and gastrointestinal tracts, and on the skin and other mucosa in mammals. OBJECTIVES: The purpose of this study was to isolate and identify the yeast flora in the caudal reproductive tract of healthy female horses. STUDY DESIGN: Longitudinal study. METHODS: A total of 453 samples were collected using double guarded swabs from the vestibule, clitoral fossa and vagina of 151 horses...
December 8, 2016: Equine Veterinary Journal
https://www.readbyqxmd.com/read/27895288/some-biological-activities-of-pigments-extracted-from-micrococcus-roseus-ptcc-1411-and-rhodotorula-glutinis-ptcc-5257
#9
Hossein Rostami, Hassan Hamedi, Mahmoud Yolmeh
The importance of replacing synthetic pigments with natural types is increasing day by day in the food industry due to the harmful effects of some synthetic pigments. Microorganisms are a major source of natural pigments, which nowadays have attracted the attention of researchers. In this study, carotenoid pigments were produced by Micrococcus roseus and Rhodotorula glutinis, and some of their biological properties such as antimicrobial, antioxidant, anticancer, and anti-inflammatory activities were evaluated...
December 2016: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/27887615/developing-a-set-of-strong-intronic-promoters-for-robust-metabolic-engineering-in-oleaginous-rhodotorula-rhodosporidium-yeast-species
#10
Yanbin Liu, Sihui Amy Yap, Chong Mei John Koh, Lianghui Ji
BACKGROUND: Red yeast species in the Rhodotorula/Rhodosporidium genus are outstanding producers of triacylglyceride and cell biomass. Metabolic engineering is expected to further enhance the productivity and versatility of these hosts for the production of biobased chemicals and fuels. Promoters with strong activity during oil-accumulation stage are critical tools for metabolic engineering of these oleaginous yeasts. RESULTS: The upstream DNA sequences of 6 genes involved in lipid biosynthesis or accumulation in Rhodotorula toruloides were studied by luciferase reporter assay...
November 25, 2016: Microbial Cell Factories
https://www.readbyqxmd.com/read/27871376/optimization-of-oligomeric-enzyme-activity-in-ionic-liquids-using-rhodotorula-glutinis-yeast-phenylalanine-ammonia-lyase
#11
Christiaan C Barron, Brandon J D Sponagle, Pugazhendhi Arivalagan, Godwin B D'Cunha
Phenylalanine ammonia lyase (E.C.4.3.1.24, PAL) activity of Rhodotorula glutinis yeast has been demonstrated in four commonly used ionic liquids. PAL forward reaction was carried out in 1-butyl-3-methylimidazolium methyl sulfate ([BMIM][MeSO4]), 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]), 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) and 1-butyl-3-methylimidazolium lactate ([BMIM][lactate]). Our experiments have revealed that PAL is catalytically active in ionic liquids and the enzyme activity in ([BMIM][PF6]) is comparable to that obtained in aqueous buffer medium...
January 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27837315/cloning-and-characterization-of-decaprenyl-diphosphate-synthase-from-three-different-fungi
#12
Daisuke Moriyama, Tomohiro Kaino, Kazuyoshi Yajima, Ryota Yanai, Yasuhiro Ikenaka, Junzo Hasegawa, Motohisa Washida, Hirokazu Nanba, Makoto Kawamukai
Coenzyme Q (CoQ) is composed of a benzoquinone moiety and an isoprenoid side chain of varying lengths. The length of the side chain is controlled by polyprenyl diphosphate synthase. In this study, dps1 genes encoding decaprenyl diphosphate synthase were cloned from three fungi: Bulleromyces albus, Saitoella complicata, and Rhodotorula minuta. The predicted Dps1 proteins contained seven conserved domains found in typical polyprenyl diphosphate synthases and were 528, 440, and 537 amino acids in length in B. albus, S...
November 11, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27818654/four-inducible-promoters-for-controlled-gene-expression-in-the-oleaginous-yeast-rhodotorula-toruloides
#13
Alexander M B Johns, John Love, Stephen J Aves
Rhodotorula (Rhodosporidium) toruloides is an oleaginous yeast with great biotechnological potential, capable of accumulating lipid up to 70% of its dry biomass, and of carotenoid biosynthesis. However, few molecular genetic tools are available for manipulation of this basidiomycete yeast and its high genomic GC content can make routine cloning difficult. We have developed plasmid vectors for transformation of R. toruloides which include elements for Saccharomyces cerevisiae in-yeast assembly; this method is robust to the assembly of GC-rich DNA and of large plasmids...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27801509/anti-rhodotorula-activity-of-mycophenolic-acid-enhanced-in-the-presence-of-polyene-antibiotic-nystatin
#14
H Kinoshita, S Wongsuntornpoj, F Ihara, T Nihira
: Rhodotorula species are opportunistic pathogens, which cause not only systemic fungaemia but also other localized infections. Despite serious side effects such as nephrotoxicity and hypokalemia, amphotericin B (a polyene antifungal) has been commonly prescribed for Rhodotorula infection because Rhodotorula species are resistant against a candin family of antifungal agents. In this study, novel active compounds against Rhodotorula species were screened from the extracts of entomopathogenic fungi based on the synergistic effect of polyene nystatin (NYS), which causes efficient targeting of compounds due to increased permeability through the fungal cell membrane...
February 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/27790744/a-case-of-cutaneous-rhodotorula-infection-mimicking-cryptococcosis
#15
S M C George, M Quante, M D Cubbon, A R MacDiarmaid-Gordon, E J Topham
Rhodotorula is a ubiquitous environmental and commensal yeast, and an emerging opportunistic pathogen, particularly in immunocompromised individuals. Clinical infections with Rhodotorula have been increasingly recognized over the past 30 years; however, infections in solid-organ transplant recipients are uncommon, and cutaneous manifestations have rarely been reported. We describe a 59-year-old male renal transplant recipient, who developed cutaneous infection with Rhodotorula upon failure of his graft and commencement of haemodialysis...
December 2016: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/27770301/characterization-of-basidiomycetous-yeasts-in-hypersaline-soils-of-the-urmia-lake-national-park-iran
#16
Lachin Mokhtarnejad, Mahdi Arzanlou, Asadollah Babai-Ahari, Simone Di Mauro, Andrea Onofri, Pietro Buzzini, Benedetta Turchetti
Urmia Lake, located in northwest Iran, is an oligotrophic and extremely hypersaline habitat that supports diverse forms of life. Owing to its unique biodiversity and special environmental conditions, Urmia Lake National Park has been designated as one of the biosphere reserves by UNESCO. This study was aimed to characterize basidiomycetous yeasts in hypersaline soils surrounding the Urmia Lake National Park using a polyphasic combination of molecular and physiological data. Soil samples were collected from eight sites in Lake Basin and six islands insides the lake...
November 2016: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27747631/real-time-pcr-analysis-of-fungal-organisms-and-bacterial-species-at-peri-implantitis-sites
#17
Frank Schwarz, Kathrin Becker, Sebastian Rahn, Andrea Hegewald, Klaus Pfeffer, Birgit Henrich
BACKGROUND: The potential role of fungal organisms and their co-aggregation with either periodontopathogens or opportunistic pathogens at peri-implantitis sites is unknown. The aim of the present study was to qualitatively/quantitatively analyze and correlate fungal organisms and bacterial species at peri-implantitis sites. METHODS: In a total of 29 patients, submucosal/subgingival plaque samples were collected at peri-implantitis and healthy implant sites as well as teeth with a history of periodontitis (controls)...
December 2015: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/27669091/multiplatform-mass-spectrometry-based-approach-identifies-extracellular-glycolipids-of-the-yeast-rhodotorula-babjevae-ucdfst-04-877
#18
Tomas Cajka, Luis A Garay, Irnayuli R Sitepu, Kyria L Boundy-Mills, Oliver Fiehn
A multiplatform mass spectrometry-based approach was used for elucidating extracellular lipids with biosurfactant properties produced by the oleaginous yeast Rhodotorula babjevae UCDFST 04-877. This strain secreted 8.6 ± 0.1 g/L extracellular lipids when grown in a benchtop bioreactor fed with 100 g/L glucose in medium without addition of hydrophobic substrate, such as oleic acid. Untargeted reversed-phase liquid chromatography-quadrupole/time-of-flight mass spectrometry (QTOFMS) detected native glycolipid molecules with masses of 574-716 Da...
September 26, 2016: Journal of Natural Products
https://www.readbyqxmd.com/read/27637948/oleaginous-yeasts-from-ethiopia
#19
Tamene Milkessa Jiru, Dawit Abate, Nicholas Kiggundu, Carolina Pohl, Marizeth Groenewald
Oleaginous microorganisms can produce high amounts of oil (>20 % of their biomass) under suitable cultivation conditions. In this research work 200 samples were collected from soil, plant surfaces (leaves, flowers and fruits), waste oils from traditional oil milling houses and dairy products (cheese, milk and yoghurt) in Ethiopia. Three hundred and forty yeast colonies were isolated from these samples. By applying Sudan III staining tests, 18 strains were selected as possible oleaginous yeasts. The 18 strains were identified and characterized for their lipid production as a feedstock for biodiesel production in the future...
December 2016: AMB Express
https://www.readbyqxmd.com/read/27619713/heterotrophic-cultivation-of-chlorella-pyrenoidosa-using-sucrose-as-the-sole-carbon-source-by-co-culture-with-rhodotorula-glutinis
#20
Shikai Wang, Yong Wu, Xu Wang
Heterotrophic cultivation of microalgae is a feasible alternative strategy to avoid the light limitation of photoautotrophic culture, but the heterotrophic utilization of disaccharides is difficult for microalgae. Aimed at this problem, a co-culture system was developed by mix culture of C. pyrenoidosa and R. glutinis using sucrose as the sole carbon source. In this system, C. pyrenoidosa could utilize glucose and fructose which were hydrolyzed from sucrose by R. glutinis. The highest specific growth rate and final cell number proportion of algae was 1...
November 2016: Bioresource Technology
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