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Original Paper

Characterization and Optimization of Biosynthesis of Bioactive Secondary Metabolites Produced by Streptomyces sp. 8812

The nutritional requirements and environmental conditions for a submerged culture of Streptomyces sp. 8812 were determined. Batch and fed-batch Streptomyces sp. 8812 fermentations were conducted to obtain high activity of secondary metabolites. In the study several factors were examined for their influence on the biosynthesis of the active metabolites-7-hydroxy-6-oxo-2,3,4,6-tetrahydroisoquinoline-3-carboxyl acid (C10H9NO4) and N-acetyl-3,4-dihydroxy-l-phenylalanine (C11H13NO5): changes in

Aleksandra Rajnisz, Adam Guśpiel, Magdalena Postek, Joanna Ziemska, Anna Laskowska, Daniel Rabczenko, Jolanta Solecka

Polish Journal of Microbiology , ISSUE 1, 51–61

Original Paper

Distribution and Identification of Endophytic Streptomyces Species from Schima wallichii as Potential Biocontrol Agents against Fungal Plant Pathogens

The prospective of endophytic microorganisms allied with medicinal plants is disproportionally large compared to those in other biomes. The use of antagonistic microorganisms to control devastating fungal pathogens is an attractive and eco-friendly substitute for chemi­cal pesticides. Many species of actinomycetes, especially the genus Streptomyces, are well known as biocontrol agents. We investigated the culturable community composition and biological control ability of endophytic

Ajit Kumar Passari, Vineet Kumar Mishra, Vijai Kumar Gupta, Ratul Saikia, Bhim Pratap Singh

Polish Journal of Microbiology , ISSUE 3, 319–329

Research Article

ANTIBIOTIC BIOSYNTHESIS AND SECONDARY METABOLISM IN HIGH-YIELDING STRAINS OF STREPTOMYCES, PENICILLIUM CHRYSOGENUM AND ACREMONIUM CHRYSOGENUM

In this article, the secondary metabolism as a basis for antibiotics production by industrial strains of Streptomyces, Penicillium chrysogenum and Acremonium chrysogenum is discussed. Images from transmission electron microscopy reveal some important features of the mycelial cells which are related to antibiotics biosynthesis. This discovery is important for further industrial strain improvement and has economic significance. Possibilities of new strategies for antimicrobial treatment are

Wiesław Kurzątkowski, Joanna Kuczerowska

Postępy Mikrobiologii - Advancements of Microbiology , ISSUE 4, 422–428

original-paper

PCR-based Screening Approach: A Rapid Method to Detect the Biosynthetic Potential of Antimicrobials in Actinobacterial Strains

Abbreviations CYP– cytochrome P450 hydroxylase NRPS– non-ribosomal peptide synthase PKS-1– polyketide synthase Introduction The gene-based screening allows the rapid detection of biosynthetic gene clusters in the isolated strains (Wood et al. 2007). In the latest years, genome mining has been focused on Streptomyces and has become a novel and rapid method to identify the previously unidentified gene clusters (Xu et al. 2019). Genes that are involved in the biosynthesis of secondary

NAILA NOUREEN, MOHSIN TASSAWAR CHEEMA, SUMAIRA ANWAR, SHAHIDA HASNAIN, IMRAN SAJID

Polish Journal of Microbiology , ISSUE 2, 139–149

Mini Review

Secondary Metabolites of Actinomycetes and their Antibacterial, Antifungal and Antiviral Properties

KATARZYNA JAKUBIEC-KRZESNIAK, ALEKSANDRA RAJNISZ-MATEUSIAK, ADAM GUSPIEL, JOANNA ZIEMSKA, JOLANTA SOLECKA

Polish Journal of Microbiology , ISSUE 3, 259–272

Original Paper

The Diversity, Growth Promoting Abilities and Anti-microbial Activities of Bacteria Isolated from the Fruiting Body of Agaricus bisporus

production, we isolated and characterized microorganisms from the fruiting body of A. bisporus. In total, 55 bacterial strains were isolated, among which nine isolates represented Actinomycetes. All the isolates were analyzed by 16S rRNA gene RFLP and sixteen representative strains by 16S rRNA gene sequencing. According to the phylogenetic analysis, eleven isolates represented the Gram-positive Bacillus, Lysinibacillus, Paenibacillus, Pandorea and Streptomyces genera, and five isolates belonged to the

Quanju Xiang, Lihua Luo, Yuhuan Liang, Qiang Chen, Xiaoping Zhang, Yunfu Gu

Polish Journal of Microbiology , ISSUE 2, 201–207

research-article

Reproduction of Meloidogyne enterolobii on selected root-knot nematode resistant sweetpotato (Ipomoea batatas) cultivars

Streptomyces ipomoeae (Rolston et al., 1987; LaBonte et al., 1992, 2008, 2012; Yencho et al., 2008). Nematode isolate, M. enterolobii (DPI: N01-00283), was previously identified using both morphological and molecular analyses (Brito et al., 2004). The species was reared on tomato Rutgers in steam-pasteurized soil. Sweetpotato cultivars used in this study were Beauregard, Covington, Evangeline, Hernandez, and Orleans. Tomato Rutgers was used as a control to determine the viability of the inoculum. Eggs were

Janete A. Brito, Johan Desaeger, D.W. Dickson

Journal of Nematology , 1–6

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