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https://www.readbyqxmd.com/read/28646113/aerosolization-of-mycotoxins-after-growth-of-toxinogenic-fungi-on-wallpaper
#1
Brankica Aleksic, Marjorie Draghi, Sebastien Ritoux, Sylviane Bailly, Marlène Lacroix, Isabelle P Oswald, Jean-Denis Bailly, Enric Robine
Many fungi can develop on building material in indoor environments if moisture is high enough. Among species that are frequently observed, some are known to be potent mycotoxin producers. This presence of toxinogenic fungi in indoor environments raises the question of the possible exposure of occupants to these toxic compounds by inhalation after aerosolization.This study investigated the mycotoxin production by Penicillium brevicompactum, Aspergillus versicolor and Stachybotrys chartarum during their growth on wallpaper and the possible subsequent aerosolization of produced mycotoxins from contaminated substrates...
June 23, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28645650/isolation-identification-and-biocontrol-of-antagonistic-bacterium-against-botrytis-cinerea-after-tomato-harvest
#2
Jun-Feng Shi, Chang-Qing Sun
Tomato is one of the most important vegetables in the world. Decay after harvest is a major issue in the development of tomato industry. Currently, the most effective method for controlling decay after harvest is storage of tomato at low temperature combined with usage of chemical bactericide; however, long-term usage of chemical bactericide not only causes pathogen resistance but also is harmful for human health and environment. Biocontrol method for the management of disease after tomato harvest has great practical significance...
June 3, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28644879/identification-of-a-novel-fungus-trichoderma-asperellum-gdfs1009-and-comprehensive-evaluation-of-its-biocontrol-efficacy
#3
Qiong Wu, Ruiyan Sun, Mi Ni, Jia Yu, Yaqian Li, Chuanjin Yu, Kai Dou, Jianhong Ren, Jie Chen
Due to its efficient broad-spectrum antimicrobial activity, Trichoderma has been established as an internationally recognized biocontrol fungus. In this study, we found and identified a novel strain of Trichoderma asperellum, named GDFS1009. The mycelium of T. asperellum GDFS1009 exhibits a high growth rate, high sporulation capacity, and strong inhibitory effects against pathogens that cause cucumber fusarium wilt and corn stalk rot. T. asperellum GDFS1009 secretes chitinase, glucanase, and protease, which can degrade the cell walls of fungi and contribute to mycoparasitism...
2017: PloS One
https://www.readbyqxmd.com/read/28640205/lectins-from-mycelia-of-basidiomycetes
#4
REVIEW
Valentina E Nikitina, Ekaterina A Loshchinina, Elena P Vetchinkina
Lectins are proteins of a nonimmunoglobulin nature that are capable of specific recognition of and reversible binding to the carbohydrate moieties of complex carbohydrates, without altering the covalent structure of any of the recognized glycosyl ligands. They have a broad range of biological activities important for the functioning of the cell and the whole organism and, owing to the high specificity of reversible binding to carbohydrates, are valuable tools used widely in biology and medicine. Lectins can be produced by many living organisms, including basidiomycetes...
June 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28631173/three-new-soil-inhabiting-species-of-trichoderma-in-the-stromaticum-clade-with-test-of-their-antagonism-to-pathogens
#5
Kai Chen, Wen-Ying Zhuang
Trichoderma is a dominant component of the soil mycoflora. During the field investigations of northern, central, and southwestern China, three new species in the Stromaticum clade were encountered from soil, and named as T. hebeiense, T. sichuanense, and T. verticillatum. Their phylogenetic positions were determined by analyses of the combined two genes: partial sequences of translation elongation factor 1-alpha and the second largest RNA polymerase subunit-encoding genes. Distinctions between the new species and their close relatives were discussed...
June 19, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28629791/inositol-phosphate-signaling-as-mediator-for-growth-and-sexual-reproduction-in-podospora-anserina
#6
Ning Xie, Gwenaël Ruprich-Robert, Florence Chapeland-Leclerc, Evelyne Coppin, Hervé Lalucque, Sylvain Brun, Robert Debuchy, Philippe Silar
The molecular pathways involved in the development of multicellular fruiting bodies in fungi are still not well known. Especially, the interplay between the mycelium, the female tissues and the zygotic tissues of the fruiting bodies is poorly documented. Here, we describe PM154, a new strain of the model ascomycetes Podospora anserina able to mate with itself and that enabled the easy recovery of new mutants affected in fruiting body development. By complete genome sequencing of spod1, one of the new mutants, we identified an inositol phosphate polykinase gene as essential, especially for fruiting body development...
June 16, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28629505/micromonospora-fulva-sp-nov-isolated-from-forest-soil
#7
Hyo-Jin Lee, Kyung-Sook Whang
A novel actinobacterium, designated strain UDF-1T, was isolated from forest soil in Chungnam, South Korea, and its taxonomic position was investigated using a polyphasic approach. Strain UDF-1T formed a branched brownish-orange substrate mycelium with spherical or oval spores. No aerial mycelium was formed. Comparative 16S rRNA gene sequence analysis indicated that strain UDF-1T belongs to the genus Micromonospora, showing the highest sequence similarity to Micromonospora palomenae NEAU-CX1T (99.2 % 16S rRNA gene sequence similarity), 'Micromonospora maoerensis' NEAU-MES19 (99...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28621039/wbla-a-pleiotropic-regulatory-gene-modulating-morphogenesis-and-daptomycin-production-in-streptomyces-roseosporus
#8
Xingwei Huang, Tingmei Ma, Jun Tian, Lan Shen, Hua Zuo, Changhua Hu, Guojian Liao
AIMS: The wblA gene, encoding a homolog of the WhiB family protein, was identified in the sequenced genome of daptomycin producer S.roseosporus. To explore the function of wblA, we construct wblA disruption strains, complemented strains and overexpression strains to test whether it can affect the production of secondary metabolites and morphogenesis. METHODS AND RESULTS: We constructed disruption strains by homologous recombination in S.roseosporus. The disruption mutant of wblA could block aerial mycelium sporulation and enhance the production of daptomycin by 51%...
June 16, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28616693/-tinea-barbae-profunda-due-to-trichophyton-mentagrophytes-after-journey-to-thailand-case-report-and-review
#9
REVIEW
G Wendrock-Shiga, D Mechtel, S Uhrlaß, D Koch, C Krüger, P Nenoff
Tinea barbae represents a very rare dermatophytosis. We report on a tinea barbae profunda following a journey to Southeast Asia. After travel to Thailand, a businessman was affected by a foudroyant proceeding abscessing infection of the upper lip and beard area. The initial therapy with oral acyclovir and oral ciprofloxacin, which later was changed to ampicillin plus sulbactam, intravenously, was unsuccessful. In a biopsy sample, histologically, with Grocott-Gomori's methenamine silver stain, fungal mycelium was apparent in the tissue...
June 14, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28604594/hemi-synthesis-and-anti-oomycete-activity-of-analogues-of-isocordoin
#10
Beatriz Escobar, Iván Montenegro, Joan Villena, Enrique Werner, Patricio Godoy, Yusser Olguín, Alejandro Madrid
An efficient synthesis of a series of 4'-oxyalkyl-isocordoin analogues (2-8) is reported for the first time. Their structures were confirmed by ¹H-NMR, (13)C-NMR, and HRMS. Their anti-oomycete activity was evaluated by mycelium and spores inhibition assay against two selected pathogenic oomycetes strains: Saprolegnia parasitica and Saprolegnia australis. The entire series of isocordoin derivatives (except compound 7) showed high inhibitory activity against these oomycete strains. Among them, compound 2 exhibited strong activity, with minimum inhibitory concentration (MIC) and minimum oomyceticidal concentration (MOC) values of 50 µg/mL and 75 µg/mL, respectively...
June 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28602756/antrodia-cinnamomea-sensitizes-radio-chemo-therapy-of-cancer-stem-like-cells-by-modulating-microrna-expression
#11
Yu-Kai Su, Ping-Hsiao Shih, Wei-Hwa Lee, Oluwaseun Adebayo Bamodu, Alexander T H Wu, Chun-Chih Huang, Yew-Min Tzeng, Michael Hsiao, Chi-Tai Yeh, Chien-Min Lin
ETHNOPHARMACOLOGICAL RELEVANCE: The discovery of many tissue-specific cancer stem cells (CSCs) continues to attract scientific attention. These CSCs are considered to be associated with chemo- and radio-resistance, and consequently, failure of conventional anticancer therapies. The recent demonstration of several microRNAs as enhancers of tumorigenicity via modulation of epithelial-mesenchymal transition and cancer stemness, makes them putative novel therapeutic target in oncology. Antrodia cinnamomea is a Chinese traditional medicine with several biological functions including anti-inflammation, antioxidant, and cancer prevention...
June 8, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28602398/in-vitro-and-in-vivo-antifungal-efficacy-of-plant-based-lawsone-against-fusarium-oxysporum-species-complex
#12
S H S Dananjaya, R M C Udayangani, Sang Yeop Shin, M Edussuriya, Chamilani Nikapitiya, Jehee Lee, Mahanama De Zoysa
Fusarium oxysporum is an ascomycete facultative fungus which generally affects to plants. However, it is recently known as a serious emerging opportunistic pathogen of human and other animals. F. oxysporum shows broad resistance to commonly used antifungal agents and therefore development of alternative therapeutic agents is required. In this study, we investigated the antifungal efficacy of plant based natural lawsone against pathogenic F. oxysporum. Antifungal susceptibility test determined the concentration dependent growth inhibition of lawsone against F...
August 2017: Microbiological Research
https://www.readbyqxmd.com/read/28601893/characterization-of-an-lrp-asnc-family-regulator-sco3361-controlling-actinorhodin-production-and-morphological-development-in-streptomyces-coelicolor
#13
Jing Liu, Jie Li, Hong Dong, Yunfu Chen, Yansheng Wang, Hang Wu, Changrun Li, David T Weaver, Lixin Zhang, Buchang Zhang
Lrp/AsnC family regulators have been found in many bacteria as crucial regulators controlling diverse cellular processes. By genomic alignment, we found that SCO3361, an Lrp/AsnC family protein from Streptomyces coelicolor, shared the highest similarity to the SACE_Lrp from Saccharopolyspora erythraea. Deletion of SCO3361 led to dramatic reduction in actinorhodin (Act) production and delay in aerial mycelium formation and sporulation on solid media. Dissection of the mechanism underlying the function of SCO3361 in Act production revealed that it altered the transcription of the cluster-situated regulator gene actII-ORF4 by directly binding to its promoter...
June 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28599643/regulation-of-the-reserve-carbohydrate-metabolism-by-alkaline-ph-and-calcium-in-neurospora-crassa-reveals-a-possible-cross-regulation-of-both-signaling-pathways
#14
Stela Virgilio, Fernanda Barbosa Cupertino, Daniela Luz Ambrosio, Maria Célia Bertolini
BACKGROUND: Glycogen and trehalose are storage carbohydrates and their levels in microorganisms vary according to environmental conditions. In Neurospora crassa, alkaline pH stress highly influences glycogen levels, and in Saccharomyces cerevisiae, the response to pH stress also involves the calcineurin signaling pathway mediated by the Crz1 transcription factor. Recently, in yeast, pH stress response genes were identified as targets of Crz1 including genes involved in glycogen and trehalose metabolism...
June 9, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28592945/defense-response-and-suppression-of-phytophthora-blight-disease-of-pepper-by-water-extract-from-spent-mushroom-substrate-of-lentinula-edodes
#15
Dae-Sun Kang, Kyong-Jin Min, A-Min Kwak, Sang-Yeop Lee, Hee-Wan Kang
The spent mushroom substrate (SMS) of Lentinula edodes that was derived from sawdust bag cultivation was used as materials for controlling Phytophthora blight disease of pepper. Water extract from SMS (WESMS) of L. edodes inhibited mycelial growth of Phytophthora capsici, suppressed Phytophthora blight disease of pepper seedlings by 65% and promoted growth of the plant over 30%. In high performance liquid chromatography (HPLC) analysis, oxalic acid was detected as the main organic acid compound in WESMS and inhibited the fungal mycelium at a minimum concentration of 200 mg/l...
June 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28589950/mycelium-mediated-transfer-of-water-and-nutrients-stimulates-bacterial-activity-in-dry-and-oligotrophic-environments
#16
Anja Worrich, Hryhoriy Stryhanyuk, Niculina Musat, Sara König, Thomas Banitz, Florian Centler, Karin Frank, Martin Thullner, Hauke Harms, Hans-Hermann Richnow, Anja Miltner, Matthias Kästner, Lukas Y Wick
Fungal-bacterial interactions are highly diverse and contribute to many ecosystem processes. Their emergence under common environmental stress scenarios however, remains elusive. Here we use a synthetic microbial ecosystem based on the germination of Bacillus subtilis spores to examine whether fungal and fungal-like (oomycete) mycelia reduce bacterial water and nutrient stress in an otherwise dry and nutrient-poor microhabitat. We find that the presence of mycelia enables the germination and subsequent growth of bacterial spores near the hyphae...
June 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28586282/remediation-capacity-of-cd-and-pb-ions-by-mycelia-of-imleria-badia-laetiporus-sulphureus-and-agaricus-bisporus-in-vitro-cultures
#17
Agata Kryczyk, Joanna Piotrowska, Magdalena Sito, Katarzyna Sulkowska-Ziaja, Konrad Dobosz, Włodzimierz Opoka, Bożena Muszyńska
The goal of this study was to evaluate cadmium and lead accumulation ability of in vitro cultures biomass containing selected edible mushroom species derived from the environment (Laetiporus sulphureus, Imleria badia) and those of commercial origin (Agaricus bisporus). Atomic absorption spectrometry was used to evaluate the content of Cd(II) and Pb(II) on the medium supplemented with Cd(II) or Pb(II), each of them at the same concentration of 5·10(-5) M. The highest concentration of Cd(II) ions was determined in the biomass from L...
June 6, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28586137/adaptive-root-foraging-strategies-along-a-boreal-temperate-forest-gradient
#18
Ivika Ostonen, Marika Truu, Heljä-Sisko Helmisaari, Martin Lukac, Werner Borken, Elena Vanguelova, Douglas L Godbold, Krista Lõhmus, Ulrich Zang, Leho Tedersoo, Jens-Konrad Preem, Katrin Rosenvald, Jürgen Aosaar, Kęstutis Armolaitis, Jane Frey, Naima Kabral, Mai Kukumägi, Jaana Leppälammi-Kujansuu, Antti-Jussi Lindroos, Päivi Merilä, Ülle Napa, Pekka Nöjd, Kaarin Parts, Veiko Uri, Mats Varik, Jaak Truu
The tree root-mycorhizosphere plays a key role in resource uptake, but also in the adaptation of forests to changing environments. The adaptive foraging mechanisms of ectomycorrhizal (EcM) and fine roots of Picea abies, Pinus sylvestris and Betula pendula were evaluated along a gradient from temperate to subarctic boreal forest (38 sites between latitudes 48°N and 69°N) in Europe. Variables describing tree resource uptake structures and processes (absorptive fine root biomass and morphology, nitrogen (N) concentration in absorptive roots, extramatrical mycelium (EMM) biomass, community structure of root-associated EcM fungi, soil and rhizosphere bacteria) were used to analyse relationships between root system functional traits and climate, soil and stand characteristics...
June 6, 2017: New Phytologist
https://www.readbyqxmd.com/read/28585092/rhizophagus-irregularis-mucl-41833-transitorily-reduces-tomato-bacterial-wilt-incidence-caused-by-ralstonia-solanacearum-under-in-vitro-conditions
#19
Marie Chave, Patrice Crozilhac, Péninna Deberdt, Katia Plouznikoff, Stéphane Declerck
Bacterial wilt caused by Ralstonia solanacearum is one of the world's most important soil-borne plant diseases. In Martinique, French West Indies, a highly virulent new pathogenic variant of this bacterium (phylotype IIB/4NPB) severely impacts tomato production. Here we report on the effect of R. solanacearum CFBP 6783, classified in phytotype IIB/4NPB, on tomato plantlets grown under strict in vitro culture conditions in the presence or absence of the arbuscular mycorrhizal fungus Rhizophagus irregularis MUCL 41833...
June 5, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28574305/growth-modeling-of-aspergillus-niger-strains-isolated-from-citrus-fruit-as-a-function-of-temperature-on-a-synthetic-medium-from-lime-citrus-latifolia-t-pericarp
#20
T Sandoval-Contreras, S Marín, A Villarruel-López, A Gschaedler, L Garrido-Sánchez, F Ascencio
Molds are responsible for postharvest spoilage of citrus fruits. The objective of this study was to evaluate the effect of temperature on growth rate and the time to visible growth of Aspergillus niger strains isolated from citrus fruits. The growth of these strains was studied on agar lime medium (AL) at different temperatures, and growth rate was estimated using the Baranyi and Roberts model (Int. J. Food Microbiol. 23:277-294, 1994). The Rosso et al. cardinal model with inflexion (L. Rosso, J. R. Lobry, S...
June 2, 2017: Journal of Food Protection
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