Mikrobiologiia最新文献_第9页

[Cultural Properties and Taxonomic Position of Helminthosporium-Like Fungal Isolates from the White Sea]. [从白海分离的类蠕虫孢子真菌的培养特性和分类地位]。

Mikrobiologiia Pub Date : 2015-09-01

Ya V Kireev, O P Konovalova, N S Myuge, A V Shnyreva, E N Bubnova

{"title":"[Cultural Properties and Taxonomic Position of Helminthosporium-Like Fungal Isolates from the White Sea].","authors":"Ya V Kireev, O P Konovalova, N S Myuge, A V Shnyreva, E N Bubnova","doi":"","DOIUrl":"","url":null,"abstract":"Morphological, cultural and physiological characteristics of 19 Helminthosporium-like hyphomycetes isolated from the White Sea were studied. Taxonomic status of the isolates was verified using molecular genetics techniques. One of the isolates was identified as Alternatia sp., while the rest of marine isolates belonged to the species Paradendriphiella salina (G.K. Sutherl.) Woudenb. & Crous. The specific features of the isolates studied were characterized as adaptive. Optimum salinity for their growth was 1-2% NaCl, which is lower than the value for the known open ocean isolates. This is probably due to relatively low salinity of White Sea (22-24 per thousand) as compared with the ocean water (35 per thousand). While the temperature optimum for growth was 22 per thousand, growth and sporulation occurred at 6 degrees C, which has not been reported for marine fungi isolated from warmer seawater. All isolates studied grew and sporulated efficiently on the medium supplied with the Fucus algae extract and in the sea water layer. Conidia of the isolates submerged in the sea water were propagated efficiently, unlike the soil-born fungi. Holoblastic conidiogenesis was demonstrated by light and scanning electron microscopy, confirming the separation of P. salina from the genus Scolecobasidium.","PeriodicalId":18732,"journal":{"name":"Mikrobiologiia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34476006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Key Role of the dca Genes in epsilon-Caprolactam Catabolism in Pseudomonas strains]. [dca基因在假单胞菌epsilon-己内酰胺分解代谢中的关键作用]

Mikrobiologiia Pub Date : 2015-09-01

T Z Esikova, O V Volkova, S A Taran, A M Boronin

引用次数: 0

[Desulfovibrio hontreensis sp. nov., a Sulfate-Reducing Bacterium Isolated from Marine Biofoulings at the South Vietnam Coastal Area]. [从越南南部沿海地区海洋生物污垢中分离出的一种硫酸盐还原菌]。

Mikrobiologiia Pub Date : 2015-09-01

A L Tarasov, G A Osipov, I A Borzenkov

{"title":"[Desulfovibrio hontreensis sp. nov., a Sulfate-Reducing Bacterium Isolated from Marine Biofoulings at the South Vietnam Coastal Area].","authors":"A L Tarasov, G A Osipov, I A Borzenkov","doi":"","DOIUrl":"","url":null,"abstract":"A Desulfovibrio strain physiologically similar to and phylogeneticall related to \"D. caledoniensis\" SEBR 7250, D. portus MSL79, and D. dechloracetivorans ATCC 700912 (96.9, 95.9, and 95.8% similarity of the 16S rRNA gen sequences, respectively) was isolated from marine biofouling in the coastal zone of the South China Sae (Nha Trang, South Vietnam). The cells of strain ME were gram-negative motile vibrios (0.4-0.6 x 1.3-2 μm) with a single flagellum. The strain grew at 20 to 39 degrees C (growth optimum at 34-37 degrees C), pH 5.8 to 8.5 (pH optimum at 6.8-7.5), and salinity from 0.08 to 1.1 M Na+ (optimum at 0.2-0.3 M Na+). In the presence of sulfate, the strain grew autotrophically with hydrogen or on lactate, formate, pyruvate, fumarate, and malate. Weak growth occurred on succinate, glycerol, and fructose. In the absence of sulfate, the strain was able to ferment pyruvate, malate (weakly), but not lactate. Sulfate, sulfite, thiosulfate, elemental sulfur, and dimethyl sulfoxide were used as electron acceptors. Vitamins and yeast extract were not required for growth. The G+C content was 52.4 mol %. Predominant fatty acids were C18:0 (13.9%), C16:0 (9.6%), iso-C16:0 (9.5%), C18: 1w7 (8.8%), anteiso-C15:0 (8.1%), and iso-C 17:1 (7.2%). The fatty acid composition was close to that of D. dechloracetivorans BO and has some similarity to that of D. portus. Based on its genotypic and phenotypic characteristics, strain ME maybe considered as a new species, for which the name Desulfovibrio hontrensis sp. nov. is proposed.","PeriodicalId":18732,"journal":{"name":"Mikrobiologiia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34476005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Antifungal Activity of Wickerhamomyces silvicola]. [柳条霉的抗真菌活性]。

Mikrobiologiia Pub Date : 2015-09-01

W I Golubev

引用次数: 0

[An Acidophilic Desulfosporosinus Isolated from the Oxidized Mining Wastes in the Transbaikal Area]. [从跨贝加尔湖地区氧化采矿废物中分离出的嗜酸性脱硫孢子菌]。

Mikrobiologiia Pub Date : 2015-09-01

O V Karnachuk, I A Kurganskaya, M R Avakyan, Y A Frank, O P Ikkert, R A Filenko, E V Danilovac, N V Pimenov

引用次数: 0

[Effect of Stress on Emergence of Antibiotic-resistant Escherichia coli Cells]. [应激对耐药大肠杆菌产生的影响]。

Mikrobiologiia Pub Date : 2015-09-01

N G Loiko, A N Kozlova, Yu A Nikolaev, A M Gaponov, A V Tutel'yan, G I El'-Registan

{"title":"[Effect of Stress on Emergence of Antibiotic-resistant Escherichia coli Cells].","authors":"N G Loiko, A N Kozlova, Yu A Nikolaev, A M Gaponov, A V Tutel'yan, G I El'-Registan","doi":"","DOIUrl":"","url":null,"abstract":"Effect of sublethal doses of physical and chemical stressors (heat shock for 2 h at 45 degrees C and addition of C12-alkylhydroxybenzene, a microbial alarmone) on development of resistance to the subsequent lethal antibiotic attack and the role of the time interval between these treatments were studied on a submerged batch culture of Escherichia coli 12. The interval sufficient for the development of stress response provides for development of temporary adaptive resistance to the antibiotic attack, resulting in increased number of surviving persister cells. The interval below the time required for the stress response potentiates cell death and results in a decreased number of persisters. Heterogeneity of the fractions (10(-4) to 10(-2)% of the intial CFU number) surviving lethal doses of an antibiotic (a mpicillin or ciprofloxacin) was found. Apart from a low number of antibiotic-resistant cells (up to 0.005% of surviving cells), the fractions contained antibiotic-tolerant forms, such as temporarily resistant metabolically adapted cells, long-term persisters, and the cells of slowly growing SCV variants with small colonies (d ≤ 1 mm). Persisters are hypothesized to act as precursors for cystlike dormant cells (CLC), in which the cell differentiation stage is completed and the processes of cell ametabolism (transition to the anabiotic state) are still incomplete.","PeriodicalId":18732,"journal":{"name":"Mikrobiologiia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34475040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Decline of Activity and Shifts in the Methanotrophic Community Structure of an Ombrotrophic Peat Bog after Wildfire]. [野火后同养型泥炭沼泽甲烷营养群落结构的活动下降和变化]。

Mikrobiologiia Pub Date : 2015-09-01

O V Danilova, S E Belova, I S Kulichevskaya, S N Dedysh

引用次数: 0

[Effect of Azospirillum lectins on the Activity of Proteolytic Enzymes and Their Inhibitors in Wheat Seedling Roots]. [偶氮螺旋菌凝集素对小麦幼苗根系蛋白水解酶及其抑制剂活性的影响]。

Mikrobiologiia Pub Date : 2015-09-01

S A Alen'kina, V E Nikitina

引用次数: 0

[Yeasts Associated with Wind-Pollinated Plants--Leading Pollen Allergens in Central Russia]. [与风媒植物有关的酵母——俄罗斯中部主要的花粉过敏原]。

Mikrobiologiia Pub Date : 2015-09-01

A M Glushakova, A V Kachalkin, T M Zheltikova, I Y Chernov

引用次数: 0

[Mechanisms of Forespore Formation during Polysporogenesis of an Anaerobic Bacterium Anaerobacter polyendosporus PST(T)]. 厌氧细菌polyendosporus PST(T)多孢子形成过程中前孢子形成的机制[j]。

Mikrobiologiia Pub Date : 2015-09-01

V I Duda, N E Suzina

{"title":"[Mechanisms of Forespore Formation during Polysporogenesis of an Anaerobic Bacterium Anaerobacter polyendosporus PST(T)].","authors":"V I Duda, N E Suzina","doi":"","DOIUrl":"","url":null,"abstract":"Forespore formation in the anaerobic bacterium Anaerobacterpolyendosporus PS-1(T) was studied by phase contrast, fluorescence, and electron microscopy. It is concluded that in this bacterium the formation of all forespores in multispore sporangia occurs via the same mechanism as that operating in all known bacilli and clostridia during the single-spore variant of endogenous sporogenesis. Its cytological indicators are as follows: (1) formation of the forespore septum, (2) engulfment of the smaller prespore cell by the larger mother cell, (3) cortex synthesis, (4) assembly of the spore coats, (5) exosporium formation, and (6) lysis of the mother cell. Polysporogenesis in strain PS-1(T) is characterized by synchronous formation of all spores (siblings) in a given sporangium and by the absence of any indication of forespore division within the mother cell. These data suggest that multiple spores within a single PS-1(T) cell result not from division of the first forespores developing at one or two cell poles, as it was reported for another polysporogenic bacterium, \"Metabacterium polyspora\", but rather from simultaneous independent formation of several prespores in a single mother cell in the course of modified cell division.","PeriodicalId":18732,"journal":{"name":"Mikrobiologiia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34475041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0