Abstract:
:Various soil fungi were tested for their capacity to degrade the insecticide [14C]photodieldrin. Of nine species investigated, Trichoderma viride was the only one which degraded the insecticide to an appreciable extent into water-soluble, non-insecticidal compounds within 4-5 weeks. These products amounted to 32-41% of the radiocarbon applied to the culture media. The degradation was a function of live mycelia, which metabolized the insecticide and excreted water-soluble compounds into the culture media. Since soils usually contain a mixture of pesticide residues, the effects of several chlorinated hydrocarbon insecticides on the capacity of the fungus to degrade [14C]photodieldrin were studied. Thus, in fungal cultures treated with compounds structurally similar to photodieldrin, such as aldrin and dieldrin, only 4-17% of the applied radiocarbon was water-soluble and more photodieldrin remained. In controls, however, 35% of the applied radiocarbon was in the form of water-soluble products and less photodieldrin remained. The degradation of [14C]photodieldrin by T. viride, with time, was associated with a continuous decline of hexane-soluble radiocarbon and a steady increase of water-soluble metabolites, which appeared in the fungal media. The amount of hexane-soluble radiocarbon in mycelia was directly related to the fungal mass.
journal_name
Can J Microbioljournal_title
Canadian journal of microbiologyauthors
Tabet JC,Lichtenstein EPdoi
10.1139/m76-198subject
Has Abstractpub_date
1976-09-01 00:00:00pages
1345-56issue
9eissn
0008-4166issn
1480-3275journal_volume
22pub_type
杂志文章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::A rapid and efficient electroporation procedure has been developed for transformation of germinating conidia of filamentous fungi. Pretreatment of conidial preparations with a cell wall weakening agent, such as beta-glucuronidase, was found to be essential for successful transformation. Using the qa-2+ gene of Neurosp...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m91-147
更新日期:1991-11-01 00:00:00
abstract::The suitability of two types of membrane filters for scanning and transmission electron-microscopical examination of chlamydospores formed from macroconidia of Fusarium solani from soil was tested. An improved method to incubate propagules in soil and to collect them free from soil particles for electron-microscopical...
journal_title:Canadian journal of microbiology
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更新日期:1976-11-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/w06-005
更新日期:2006-06-01 00:00:00
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journal_title:Canadian journal of microbiology
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更新日期:2001-07-01 00:00:00
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journal_title:Canadian journal of microbiology
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更新日期:2007-09-01 00:00:00
abstract::Eighteen gram-negative marine bacteria and two terrestrial species, Escherichia coli and Pseudomonas aeruginosa, were examined for their sensitivity to lysis in distilled water after exposure to a salt solution containing a sea water concentration of Mg2+ (0.05 M) or to 0.5 M NaCl. A spectrum of lytic susceptibility w...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
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更新日期:1982-04-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/w00-061
更新日期:2000-09-01 00:00:00
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更新日期:2018-01-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m78-204
更新日期:1978-10-01 00:00:00
abstract::We continued our study of high-molecular-mass proteases (HMMPs) using several strains of the genus Trichoderma, and other filamentous fungi (Botrytis cinerea, Aspergillus niger, Fusarium culmorum, and Penicillium purpurogenum). We found that five Trichoderma strains secreted HMMPs into the media after induction with b...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/cjm-2018-0670
更新日期:2019-09-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/w03-098
更新日期:2003-12-01 00:00:00
abstract::The altitudinal distribution of microfungi associated with Betula ermanii Cham. leaf litter was investigated on Mt. Rishiri (1719 m), northern Japan. Fallen leaves were collected at five sites of different altitudes (approximately 300, 600, 900, 1200, and 1500 m above sea level) along a transect on the northern slope ...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/w09-030
更新日期:2009-07-01 00:00:00
abstract::The susceptibility of congenitally immunodeficient mice to a nonencapsulated strain of Cryptococcus neoformans (strain M7) was evaluated. Gnotobiotic mice with defined congenital defects in innate immunity (beige) or cell-mediated immunity (athymic) or with combined defects in innate and cellular immunity (beige athym...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m91-144
更新日期:1991-11-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m91-099
更新日期:1991-08-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:
更新日期:1999-06-01 00:00:00
abstract::Canadian oil sands tailings are predominately sodic residues contaminated by hydrocarbons such as naphthenic acids. These conditions are harsh for plant development. In this study, we evaluated the effect of inoculating roots of Alnus viridis ssp. crispa and Alnus incana ssp. rugosa with ectomycorrhizal fungi in the p...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/cjm-2015-0703
更新日期:2016-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2005-08-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
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journal_title:Canadian journal of microbiology
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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::The morphology of Clostridium pasteurianum cells grown on 10(-2) M SO32- showed significant alteration in cell shape and the absence of the electron translucent reserve polysaccharide (amylopectin) when compared to sulfate-grown cells. At the lower sulfite concentrations (10(-3) and 10(-4)M SO32-) the cells showed the...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
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更新日期:1976-02-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
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更新日期:1982-12-01 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::The phototrophic purple sulfur bacterium Thiopedia rosea forms multicellular, gas-vacuolate, regular, flat aggregates (platelets, sheets) held together by slime. Platelets found in eutrophic water consisted of slime (85% of the total wet volume) and 16 cells, while the gas-filled vacuole occupied 44% of the volume of ...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m86-113
更新日期:1986-07-01 00:00:00
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journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/cjm-2013-0053
更新日期:2013-05-01 00:00:00
abstract::Examination of immune complexes between cells of Streptococcus mutans and homologous antiserum by the techniques of thin-sectioning and freeze-etching revealed that the cells were embedded within and extensive matrix 80-90 nm thick with defined boundaries. ...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m76-129
更新日期:1976-06-01 00:00:00
abstract::Nodulation of soybeans by indigenous and inoculum strains of Bradyrhizobium japonicum was studied in field experiments in Wisconsin from 1983 to 86. Aqueous suspensions of bacteria were applied to seeds at the time of planting at levels of 7 × 10(7)-10(10) bacteria per 2.5-cm row. The predominant indigenous serogroup ...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m90-136
更新日期:1990-11-01 00:00:00
abstract::Epiphytic tracer bacteris (a Pseudomonas sp. and an Arthrobacter sp.) from soybean buds were introduced into open flowers of greenhouse-grown soybean plants. Of the 177 resulting pods cultured after surface disinfection, tracers were recovered from within 24. Seed from two of these pods also carried tracers. ...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/m76-064
更新日期:1976-03-01 00:00:00
abstract::The multi-drug resistant pathogen Acinetobacter baumannii displays unusual control of its SOS mutagenesis genes, as it does not encode a LexA repressor, but instead employs the UmuDAb repressor and a small DdrR protein that is uniquely found in Acinetobacter species. We used bacterial adenylate cyclase t...
journal_title:Canadian journal of microbiology
pub_type: 杂志文章
doi:10.1139/cjm-2020-0219
更新日期:2020-11-12 00:00:00