Abstract：
:A microcinematographic analysis of the behaviour and movements of cells and cell masses in mated cultures (NC4 X VI2) of Dictyostelium discoideum indicates that a chemotactic process directs cell aggregation during macrocyst development. Zygote giant cells form before aggregation begins and act as the aggregation centres. Young multicellular macrocyst stages are sources of cyclic AMP, and amoebae from macrocyst cultures orient chemotactically to cyclic AMP. The data, coupled with other characteristics such as pulsatile streaming, suggest that the aggregation process leading to macrycyst development is the same as that occurring during fruit construction. Other aspects of sexual development are also discussed. Based upon these data, we propose a model for the sequence of events leading to macrocyst development in D. discoideum.
journal_name
Can J Microbioljournal_title
Canadian journal of microbiologyauthors
O'Day DHdoi
10.1139/m79-221subject
Has Abstractpub_date
1979-12-01 00:00:00pages
1416-26issue
12eissn
0008-4166issn
1480-3275journal_volume
25pub_type
杂志文章abstract：:To isolate thiamine excretors and (or) overproducers, 188 cultures belonging to nine yeast and three fungal genera were screened. Nine excreted thiamine as determined by both the presence of cross-feeding zones on a thiamine-free agar medium seeded with a thiamine-requiring yeast strain and by the direct detection of ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m92-189
更新日期：1992-11-01 00:00:00
abstract：:A previously unmapped pan gene was localized in an Escherichia coli K-12 strain using Hfr and F' matings and by transduction studies. This Pan- mutation was shown by supplementation studies to impart a block in pantoate biosynthesis. The pan gene cotransduced with rha, metB, and argE placing it at 87 min. ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m81-190
更新日期：1981-11-01 00:00:00
abstract：:Dense populations of anaerobic bacteria were found sequentially layered below the thermocline in two eutrophic lakes in southwest Michigan. Phase and electron microscopy of whole cells and thin sections were used to reveal the in situ morphology of the dominant members of the community. The predominant chlorophyll-con...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m75-051
更新日期：1975-03-01 00:00:00
abstract：:The use of microbial fertilizers can help to avoid the harmful effects of traditional agricultural fertilizers and pesticides; however, there are many constraints on the practical application of such fertilizers. In this study, microbial biochar formulations (MBFs) were obtained by loading biochar, created from agricu...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2018-0333
更新日期：2019-05-01 00:00:00
abstract：:Mycoplasma pneumoniae is an important causative agent of atypical pneumonia. This study was to determine the ability of a DNA expression vector, which encodes the carboxy terminal region of the M. pneumoniae P1 protein (P1C), to induce humoral and cellular immune responses and to protect against M. pneumoniae infecti...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w2012-041
更新日期：2012-05-01 00:00:00
abstract：:The deliberate application of the methodology of contemporary molecular genetics to problems in bacterial systematics has led to a broad new understanding of the evolutionary history of both prokaryotes and eukaryotes. In this review, I discuss some of the major conclusions of this endeavour and try to predict future ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章,评审
doi：10.1139/m88-093
更新日期：1988-04-01 00:00:00
abstract：:This study examined the phylogenetic structure of serotype a Haemophilus influenzae (Hia) isolates recovered from patients in Canada. Hia isolates from 490 separate patients and an American Type Culture Collection (ATCC) strain were analyzed by multilocus sequence typing (MLST), with 18 different sequence types (STs) ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2019-0406
更新日期：2020-02-01 00:00:00
abstract：:Isolated toluene-degrading Pseudomonas stutzeri ST-9 bacteria were grown in a minimal medium containing toluene (100 mg·L(-1)) (MMT) or glucose (MMG) as the sole carbon source, with specific growth rates of 0.019 h(-1) and 0.042 h(-1), respectively. Scanning (SEM) as well as transmission (TEM) electron microscope anal...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2016-0099
更新日期：2016-08-01 00:00:00
abstract：:Hydrogen cyanide production by Pseudomonas aeruginosa growing in a synthetic medium required aerobosis but operated efficiently at low dissolved oxygen concentration. Half maximum levels of cyanogenesis occurred at 0.015 microM oxygen; maximum cyanogenesis occurred over a wide range, 0.1-180 microM, of oxygen concentr...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m83-209
更新日期：1983-10-01 00:00:00
abstract：:Exogenous nucleotides were found to protect mammalian cells from the lethal effects of diphtheria toxin. Protective potency of a given nucleotide was base specific and phosphate chain length dependent. Full expression of protective potency required an intact nucleotide, but the effect did not appear to be mediated by ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m79-046
更新日期：1979-03-01 00:00:00
abstract：:Fusaproliferin (FP), a toxic metabolite of the world-wide maize pathogens Fusarium proliferatum and Fusarium subglutinans, was recently found to be a natural contaminant of maize. Its toxic activity on haematopoietic human cell lines and its teratogenic effects on chicken embryos has been recently proved. Therefore a ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：:Symbiotic nitrogen fixation may be limited by the transport of C4 dicarboxylates into bacteroids in the nodule for use as a carbon and energy source. In an attempt to increase dicarboxylate transport, a plasmid was constructed in which the Rhizobium meliloti structural transport gene dctA was fused to a tryptophan ope...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m92-091
更新日期：1992-06-01 00:00:00
abstract：:In the divE mutant, which has a temperature-sensitive mutation in the tRNA1(Ser) gene, the synthesis of beta-galactosidase is dramatically decreased at the non-permissive temperature. In Escherichia coli, the UCA codon is only recognized by tRNA1(Ser). Several genes containing UCA codons are normally expressed at 42 d...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：
更新日期：2000-06-01 00:00:00
abstract：:The diversity and variation of total and active ammonia-oxidizing bacteria in a full-scale aerated submerged biofilm reactor for drinking water pretreatment were characterized by clone libraries and denaturing gradient gel electrophoresis (DGGE) analysis of 16S rRNA and its gene during a whole year. Sequences obtained...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w08-011
更新日期：2008-05-01 00:00:00
abstract：:HPr is a protein of the phosphoenolpyruvate:sugar phosphotransferase transport system (PTS). In gram-positive bacteria, HPr can be phosphorylated on Ser-46 by the kinase/phosphorylase HprK/P and on His-15 by phospho-enzyme I (EI~P) of the PTS. In vitro studies with purified HPrs from Bacillus subtilis, Enterococcus fa...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w08-085
更新日期：2008-11-01 00:00:00
abstract：:The catabolism of glucose by Streptomyces C5, a producer of anthracycline antibiotics, was investigated to determine the pathways that supply precursors for anthracycline biosynthesis. Carbons for the biosynthesis of epsilon-rhodomycinone, an anthracycline aglycone, from radiolabelled glucose were derived primarily fr...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m88-217
更新日期：1988-11-01 00:00:00
abstract：:Numbers of viable bacteria as indicated by colony-forming units (CFU), microbial adenosine triphosphate levels, dissolved organic carbon (DOC), particulate organic carbon and nitrogen (POC and PON), glucose concentration, heterotrophic potential (Vmax), and in situ heterotrophic activity (Vn) of near-surface microlaye...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m76-251
更新日期：1976-12-01 00:00:00
abstract：:Agroinfiltration is used to treat plants with modified strains of Agrobacterium tumefaciens for the purpose of transient in planta expression of genes transferred from the bacterium. These genes encode valuable recombinant proteins for therapeutic or industrial applications. Treatment of large quantities of plants for...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2020-0239
更新日期：2021-01-01 00:00:00
abstract：:Sixty-four species of filamentous fungi from five flare pits in northern and western Canada were tested for their ability to degrade crude oil using gas chromatographic analysis of residual hydrocarbons following incubation. Nine isolates were tested further using radiorespirometry to determine the extent of mineraliz...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：:One of the proposed mechanisms by which rhizobacteria enhance plant growth is through the production of plant growth regulators. Five plant growth promoting rhizobacterial (PGPR) strains produced the cytokinin dihydrozeatin riboside (DHZR) in pure culture. Cytokinin production by Pseudomonas fluorescens G20-18, a rifa...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w01-029
更新日期：2001-05-01 00:00:00
abstract：:Among nine eluents tested, 0.5% (w/v) isoelectric casein at pH 9.0 and 0.5% (w/v) non-fat dry milk (pH 9.0) were the most efficient in eluting poliovirus type 1 (Sabin) from Eustis fine sand. However, no significant difference was found between the overall (elution followed by concentration) virus recoveries by non-fa...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m79-130
更新日期：1979-08-01 00:00:00
abstract：:Bacterial communities that can degrade surfactants have been selected from coastal seawaters contaminated by urban sewages. Only the linear fraction of commercial anionic surfactants was quickly degraded, and a residual fraction representing 10% of the initial concentration always remained. The highest concentrations ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：
更新日期：1987-10-01 00:00:00
abstract：:Forty different antibiotics with diverse kingdom and functional specificities were used to measure the functional characteristics of the archaebacterial translation apparatus. The resulting inhibitory curves, which are characteristic of the cell-free system analyzed, were transformed into quantitative values that were...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m89-021
更新日期：1989-01-01 00:00:00
abstract：:Studies show that Paracoccus denitrificans can denitrify nitrogen sources under aerobic conditions. However, the lack of data on its genome sequence has restricted molecular studies and practical applications. In this study, the complete genome of P. denitrificans ATCC 19367 was sequenced and its nitrogen metabolism p...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2019-0037
更新日期：2019-07-01 00:00:00
abstract：:Two new yeast species were isolated from flowers of Hibiscus species in Eastern and Northern Australia. Kodamaea kakaduensis is heterothallic, haploid, and similar to other Kodamaea species and to Candida restingae. Buds are often produced on short protuberances, and a true mycelium is formed. The new species differs ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w98-225
更新日期：1999-02-01 00:00:00
abstract：:Through genomic analysis of mucosa-associated Escherichia coli strains, we found a close genetic association among isolates from pediatric inflammatory bowel disease (IBD) patients. A specific E. coli pathovar, adherent-invasive E. coli (AIEC), was found in Crohn's disease (CD) adult patients - this pathovar has enhan...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/w2012-007
更新日期：2012-04-01 00:00:00
abstract：:In Neurospora crassa, heat shock results in the induction of 9 to 11 heat shock proteins (HSP), of which HSP80 is the most abundant and the first to be synthesized. The induction of HSP80 was investigated during normal growth (2% sucrose) and under sucrose starvation. Transfer of mycelium to a medium supplemented with...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m88-031
更新日期：1988-02-01 00:00:00
abstract：:The induction of nitrogenase (C2H2) activity in asymbiotically cultured Rhizobium sp. 32H1 was found to be associated with morphological changes in the cells which were more pronounced than those seen in bacteroids. Polyphosphate granules were found in both bacteroids and cultured cells, but poly-beta-hydroxybutyrate ...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m79-055
更新日期：1979-03-01 00:00:00
abstract：:Lyme disease is a tick-borne disease that is emerging in Canada. The disease is caused by spirochetes of the Lyme borreliosis group, which is expanding as new species are discovered. In Canada, Lyme disease risk has so far been assessed primarily by detection of Borrelia burgdorferi sensu stricto. Of Ixodes scapularis...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/cjm-2018-0376
更新日期：2019-02-01 00:00:00
abstract：:High resolution two-dimensional PAGE was used to analyse protein variation among serotype 1 poliovirus isolates. Viruses isolated from patients with recent histories of vaccination with live attenuated poliovirus were compared with prototype serotype 1 poliovaccine. The nonvaccine Mahoney and Brunenders strains of ser...
journal_title：Canadian journal of microbiology
pub_type： 杂志文章
doi：10.1139/m88-136
更新日期：1988-06-01 00:00:00
