background and objectives: the present work was carried out to investigate the ability of spirulina platensis to produce antimicrobial substance against bacteria and fungi.  materials and methods: the cells of the cyanobacterium were subjected to different extractions and the purified antagonistic compound proved to be effective against broad spectrum of bacteria and fungi. the antagonistic com...

'T'he relat~ve abundance and nature of associations between symbiotic species can be affected by abiotic contfrl~ons L L I ~ ~ consequences for population dynamics. We itlvestigated the effects of temperature on the community of mltes and fungi associated w ~ t h the southern pine beetle, L3endrocfon11.s frontulis, an irilportant pest of pine forests in llic snuthcrn Unitcd States. First, we dc...

Fungi, especially the filamentous types, have become definitely established as the most important group of organisms that is capable of producing antibacterial substances under proper conditions of culture. No less significant, even if less well known, is the fact that many microorganisms, including fungi on the one hand, and bacteria and actinomycetes on the other, are capable of producing age...

A total of 62 bacterial isolates were obtained from Gomsohang mud flat, Mohang mud flat, and Jeju Island, Republic of Korea. Among them, the isolate CNU114001 showed significant antagonistic activity against pathogenic fungi by dual culture method. The isolate CNU114001 was identified as Bacillus amyloliquefaciens by morphological observation and molecular data analysis, including 16SrDNA and g...

An antifungal metabolite, oosporein, was isolated from the culture of Verticillium psalliotae that produced the antagonistic effects on Phytophthora infestans. Oosporein exhibited a significant growth-inhibitory effect on P. infestans in comparison with other phytopathogenic fungi.

Actinobacteria from the genus Streptomyces have been studied as potential biocontrol agents worldwide. In this study, a total of 35 isolates of Actinomycete like colonies were isolated from the rhizospheres of various plant species. These isolates were primary screened for antagonistic activity to inhibit mycelial growth of Colletotrichum gloeosporioides. The screen revealed that seven isolates...

Since Pasteur first demonstrated that certain micro6rganisms are able to exert antagonistic or antibiotic effects upon other organisms, an extensive literature has accumulated (Waksman, 1941). The presence of living organisms is often necessary for the phenomenon of antagonism to take place. In many cases, the antagonist was found to produce an active substance responsible for this action. The ...

Mycotoxins such as aflatoxins, fumonisins, trichothecenes, and ochratoxins are contaminants of many agronomic crops worldwide, and cause both economic losses and health effects. The potential of antagonistic microorganisms to be developed into biological control agents has been investigated in several crop systems, as alternatives to chemical fungicides for control of mycotoxigenic fungi. Labor...

A new strain, SD12, was isolated from tannery waste polluted soil and identified as Pseudomonas aeruginosa on the basis of phenotypic traits and by comparison of 16S rRNA sequences. This bacterium exhibited broad-spectrum antagonistic activity against phytopathogenic fungi. The strain produced phosphatases, cellulases, proteases, pectinases, and HCN and also retained its ability to produce hydr...

Solvent extrnct~ of 6 strains aClinomycete.<; isolated from mangrove environment were found 10 inhibilthe growth offish bacterial pathogens. filamentou~ and non·filamentou~ fungi. Out of the 104 actinomyceles tested 56% of the isolates exhibited antagonistic effect towards gram-negative bacleria and 35.6% toward<; grnm-positive bacteria. 1be concentrations required to bring about 100% inhibitio...