[The taxonomic study of the strain Bacillus sp. UCM B-7404--phytopathogenic fungae antagonist].

The polyphasic taxonomic analysis of strain Bacillus sp. UCM B-7404 active against phytopathogenic fungi and producing extracellular phytohormones, lytic enzymes and lipopeptide antifungal compounds has been carried out. The basic cell wall fatty acids presented by branched iso- and anteiso- C15:0 and C17:0 acids, contained 65-77% of the average pool. Phylogenetic assay of 16S rRNA gene nucleotide sequence, phenotypic and chemotaxonomic characteristics proved the attachment of strain Bacillus sp. UCM B-7404 to Bacillus amyloliquefaciens subsp. plantarum.

[Some properties of Bacillus subtilis strains active against rotting agents on strawberries and fruit].

This work was aimed at the study of biological and genetic peculiarities of the strains Bacillus subtilis 2/10 and 63z which were selected for protection of strawberries from Botrytis fructigena and for apples under storage. The obtained strains were shown to possess a broad spectrum of antagonistic activity against phytopathogenic fungi and bacteria and this activity was manifested at low temperatures specific for the agriculture production storage. These cultures were not toxigenic or pathogenic in respect of plants and hot-blooded. By RAPD-typing and sequencing of the cloned parts of DNA the genetic specificity of the selected cultures was shown compared with other Bacillus subtilis strains which had not been so active. A set of genetic primes was selected to allow one to reliably identify the given strains during production of biopreparations and to control their use in the field conditions.

[Taxonomic contribution and antagonistic properties of antarctic fluorescent bacteria of Pseudomonas genus]. / Taksonomichnyi sklad ta antahonistychni vlastyvosti antarktychnykh fluorestsiiuiuchykh bakterii rodu Pseudomonas.

Fifty (50) strains of Pseudomonas genus have been isolated from the samples of soil, moss and bottom sediments taken on the Galindes, Piterman and Deception Islands (Ukrainian Antarctic station Akademik Vernadsky). Characteristic of the above strains by 84 phenotype features and identification by means of the computer program permitted them to be referred to the species Pseudomonas fluorescens (biovar V.), P. putida (biovars A and B), P. veronii. The belonging of the strain 23 to the species P. veronii has been confirmed by the results of sequence of 16S rRNA. Being grown at low temperatures (4 degrees C) the strains of the above species are characterized by high antagonistic activity as to Gram-positive, Gram-negative bacteria, yeast and microscopic fungi. Cultivation of antagonists at 26 degrees C led to the sharp decrease or complete disappearance of the antagonistic effect.

[Bsu50441--isoschizomer of endonuclease restriction AsuI]. / Bsu50441--izoshyzomer endonukleazy restryktsiï AsuI.

Endonuclease of restriction of type II has been found in Bacillus subtilis B-5044 during testing of endophytic strains of cotton plants bacilli. The restrictase Bsu5044I hydrolysed DNA of M13mp18 phage in 4 sites; pUC19 DNA in 5 sites; pBR322 in 15 sites. There were a lot of sites restriction in DNAs of phages T7 and lambda. A comparison of electrophoretical divisions of Bsu5044I and Cfr13I fragments of phages and plasmid DNAs showed their identity. Thus, the found restrictase Bsu5044I is an isoschisomer of AsuI.

[Type-II site-specific restriction endonucleases in endophytic strains of the genus Bacillus]. / Saitspetsyfichni endonukleazy restryktsiï II typu u endofitnykh shtamiv rodu Bacillus.

Using a modified Belavin's method the site-specific II type restriction endonucleases were determined for two endophytic strains of the Bacillus genus from the inner tissues of cotton plants.

[The identification of freshly isolated strains, the causative agents of human candidiasis and the search for effective antifungal probiotics]. / Identyfikatsiia svizhovydilenykh shtamiv--zbudnykiv kandydoziv liudyny i poshuk efektyvnykh protyhrybkovykh probiotykiv.

The species variety of yeasts of the genus Candida in children and patients with AIDS has been investigated. Composition of the studied species was found to be similar in newborns and in women with candidiasis. In order to create new probiotics with antifungal properties, the cluster analysis of antagonistic activity of some Bacillus strains against Enterobacteriaceae, Candida, normoflora and food-fermenting lactobacteria has been conducted. There were selected the combinations of some Bacillus strains, which effectively inhibited pathogenic and opportunistic microorganisms and at the same time had no effect on intestinal normoflora.