Abstract:
:The submerged culture of the Claviceps purpurea strain studied was polymorphous. In the process of alkaloid synthesis, cytodifferentiation preceded biochemical differentiation. The onset of the alkaloid phase was characterized by: predominance of chlamydospores in the culture, the presence of vegetative cells with reduced or arrested proliferation, maximum acetylCoA carboxylase activity, the maximum amount of total fatty acids, an over-average cell pool tryptophan level and minimum tryptophan synthetase activity. Intracellular ricinoleic acid was an indicator of differentiation of the culture towards alkaloid formation and also of alkaloid synthesis. The cytodifferentiation period in the initial phases of fermentation, when the cell has several alternative possibilities of development, is regarded as the most sensitive sector of the regulatory mechanisms of alkaloid formation.
journal_name
Folia Microbiol (Praha)journal_title
Folia microbiologicaauthors
Rehácek Z,Kozová Jdoi
10.1007/BF02876766subject
Has Abstractpub_date
1975-01-01 00:00:00pages
112-7issue
2eissn
0015-5632issn
1874-9356journal_volume
20pub_type
杂志文章abstract::NaN3 was found to inhibit transformation but not the irreversible binding of donor 3H-DNA in competent cells of the original low-transformable strain Bacillus subtilis 168 trp2. Addition of NaN3 to cells of two mutants Bacillus subtilis HT39 and HT46 with an increased transformability decreased substantially the irrev...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02877669
更新日期:1977-01-01 00:00:00
abstract::The antibiotic-producing ability of 57 bacteria isolated from 8 marine sedentary organisms, 6 sponges (Spirastrella sp., Phyllospongia sp., Ircinia sp., Aaptos sp., Azorica sp., Axinella sp.), 1 soft coral (Lobophytum sp.) and 1 alga (Sargassum sp.), was evaluated against 6 phytopathogenic fungi (Helminthosporium oryz...
journal_title:Folia microbiologica
pub_type: 杂志文章
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abstract::Adhesion of group B streptococci to human epithelial vaginal and buccal cells proceeded in three phases which differed qualitatively. Maximum adhesion took place within 10 min of interaction, during the second phase (10-15 min), the percentage of adherent cells decreased significantly (P less than 0.05) whereas during...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02884088
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02815697
更新日期:1996-01-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/s12223-014-0363-x
更新日期:2015-05-01 00:00:00
abstract::Biological activity of secondary metabolites produced by a plant-growth-promoting Pseudomonas fluorescens was evaluated. The strain produced antibiotics phenazine (PHE), 2,4-diacetylphloroglucinol (PHL) and siderophore pyoverdin (PYO) in standard King's B and succinic acid media, respectively. After extraction, PYO wa...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02818690
更新日期:2002-01-01 00:00:00
abstract::Ten thermophilic Gram-positive bacteria were isolated from various soils of Saudi Arabia. The strains are spore-forming rods belonging to the species Bacillus stearothermophilus. The cells are motile, strictly aerobic, catalase and oxidase positive. The sporangia appear to be swollen and their position varies from ter...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02927328
更新日期:1981-01-01 00:00:00
abstract::Using simultaneous fusion of protoplasts of three strains the auxotrophic K3 killer designated MH1 was prepared at a very low frequency and further employed for the transfer of the K3 killer character into a commercial wine yeast. A novel Saccharomyces Bratislava 1K3 strain with desirable technological and anti-yeast ...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02814566
更新日期:1992-01-01 00:00:00
abstract::Streptomyces cinnamonensis produces a new substance named AIB (for anti-isobutyrate) factor which, on a solid medium, efficiently counteracts toxic concentrations not only of isobutyrate but also of other salts of short-chain monocarboxylic acids. In the present study we demonstrate that the AIB factor activity is wid...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02891697
更新日期:1993-01-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02923516
更新日期:1985-01-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02897214
更新日期:1980-01-01 00:00:00
abstract::The newly described type strains Arcanobacterium pinnipediorum DSM 28752T and Arcanobacterium wilhelmae DSM 102162T, initially isolated from an anal swab of a harbor seal (Sammra et al. Int J Syst Evol Microbiol 65:4539-4543, 2015) and the genital tract of a rhinoceros (Sammra et al. Int J Syst Evol Microbiol 67:2093-...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/s12223-018-0610-7
更新日期:2018-11-01 00:00:00
abstract::One-week dextran sulfate treatment of conventional (CV) immunodeficient (SCID) mice gave rise to acute colitis in the colon mucosa; germ-free (GF) SCID mice did not exhibit any changes in colon morphology. Dextran sulfate application to CV immunocompetent (BALB/c) mice did induce substantial changes in the colon mucos...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02818004
更新日期:2001-01-01 00:00:00
abstract::Euglena ignobilis cells in natural puddle water of pH 7.8, when kept at 21 +/- 2 degrees C and under continuous light (intensity of approximately 30 micromol m(-2) s(-1)) in a culture chamber, decreased their speed of movement from > or = 78000 microm/min (after a 12-h cultivation), to 850-1300 microm/min after 18 h. ...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02931412
更新日期:2005-01-01 00:00:00
abstract::Isolates of Stenotrophomonas maltophilia species display the feature "temperature-dependent susceptibility" (TDS) to antibiotics. Both 30TDS strains (at least 4 times lower value of minimum inhibitory concentration (MIC) of an antibiotic at 30 than at 37 degrees C) and 37TDS strains (at least 4 times lower value of MI...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02818682
更新日期:2002-01-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章,评审
doi:10.1007/BF02931313
更新日期:2007-01-01 00:00:00
abstract::A method is presented for the successful decontamination of sparingly soluble pteridine derivatives by microwave irradiation. The method is nondestructive, rapid and effective in eliminating contamination. ...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02814514
更新日期:1991-01-01 00:00:00
abstract::The color of light (white, red, blue, and green) had a significant effect on the growth and reproductive processes (both in the nucleocytoplasmic and chloroplast compartment of the cells) in synchronous cultures of Scenedesmus obliquus. This effect decreased in the order red > white > blue > green. In the same order, ...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02931828
更新日期:2006-01-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02814307
更新日期:1994-01-01 00:00:00
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journal_title:Folia microbiologica
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doi:10.1007/s12223-020-00819-z
更新日期:2020-12-01 00:00:00
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journal_title:Folia microbiologica
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doi:10.1007/BF02817421
更新日期:2000-01-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/s12223-014-0305-7
更新日期:2014-07-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02818723
更新日期:2000-01-01 00:00:00
abstract::The diversity and structure of bacterial and actinobacteral diversity and communities were determined in a metallophytic grassland soil from an upland site in northern England. The community profiles were subjected to multivariate analyses using correspondence and cluster analyses. The total bacterial community divers...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/s12223-009-0042-5
更新日期:2009-01-01 00:00:00
abstract::In the present study, 193 Aspergillus strains were isolated from a total of 100 soil samples of pistachio orchards, which all of them were identified as Aspergillus flavus as the most abundant species of Aspergillus section Flavi existing in the environment. Approximately 59%, 81%, and 61% of the isolates were capable...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/s12223-011-0090-5
更新日期:2012-01-01 00:00:00
abstract::beta-Glucosidase from the fungus Thermoascus aurantiacus grown on semi-solid fermentation medium (using ground corncob as substrate) was partially purified in 5 steps--ultrafiltration, ethanol precipitation, gel filtration and 2 anion exchange chromatography runs, and characterized. After the first anion exchange chro...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02818672
更新日期:2002-01-01 00:00:00
abstract::The antimicrobial and morphogenetic effects of fourteen newly synthesized 2-substituted derivatives of quinoline-4-carboxylic acid and quinoline-4-carboxamide were studied using G+ and G- bacteria, yeasts and filamentous fungi. The highest antimicrobial effects were found with substituted quinoline-4-carboxylic acid d...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02817551
更新日期:2000-01-01 00:00:00
abstract::Five trisubstituted quinazolones and eight trisubstituted quinazoline-4-thiones have been tested for antibacterial effects by a microdilution method. Four derivatives exerted a significant effect on E. coli, P. aeruginosa, S. aureus and B. subtilis (IC50 < 100 mg/L). In the bacterium P. aeruginosa six quinazolines sho...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02817411
更新日期:2000-01-01 00:00:00
abstract::Cultures of 33 basidiomycete strains out of 35 tested were viable with unchanged characteristics after four years of maintenance on perlite in cryovials. These cultures can be a good substitute for agar cultures in long-term maintenance of fungi. For comparison, the storage under oil was evaluated but it turned out to...
journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/s12223-008-0084-0
更新日期:2008-01-01 00:00:00
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journal_title:Folia microbiologica
pub_type: 杂志文章
doi:10.1007/BF02818700
更新日期:2002-01-01 00:00:00