September 2016
Screening endophytic actinobacteria with potential antifungal activity against Bipolaris sorokiniana and growth promotion of wheat seedlings
Actinobacteria secrete substances that limit or inhibit the growth of plant pathogenic fungi and may be used in the biocontrol of these microorganisms. The aim of this study was to characterize physiological and enzymatic activity of endophytic actinobacteria, evaluate their antifungal activity against Bipolaris sorokiniana root colonization, and evaluate their efficiency in promoting the growth of wheat seedlings....
September 2016
Effect of temperature, pH and substrate composition on production of lipopeptides by Bacillus amyloliquefaciens 629
The lipopeptides surfactin, fengycin and iturin produced by Bacillus species have diverse ecological roles, including antimicrobial activity, induced systemic resistance in plants against pathogens and plant colonization by the producing strain. The conditions that govern both lipopeptide production and plant colonization are not fully understood. The present study investigated the role of growth media, temperature and...
September 2016
Isolation, screening and statistical optimizing of L-methioninase production by Chaetomium globosum
Egyptian soil sample was screened for isolation methioninlytic fungi by a rapid plate assay procedure. Eighteen strains of different isolated fungi were screened quantitavely for their L-methioninase activity. Chaetomium globosum was the most efficacious isolate and a dematiaceous filamentous fungi, it was identified at the molecular level by ribotyping 18S rRNA along with the biochemical characterization, and...
September 2016
Isolation and identification of potential probiotic bacteria on surfaces of Oreochromis niloticus and Clarias gariepinus from around Kampala, Uganda
Increased fish mortality due to infections has forced most farmers to resort the use of chemotherapeutic agents especially antibiotics. The continued use of these drugs in aquaculture is becoming limited as pathogens develop resistance and infer unpredicted long term public health effects. More research efforts are building to identify alternative disease prevention methods, among which the use of probiotics has been...
September 2016
Rapid microbiological tests for prospecting new fungal strains with high potentiality for the pectinolytic enzymes production
Prospecting of new isolates producers of pectinolitic enzymes were performed with cultivation of substrates of rice, soybean and corn bran. Pectinolitic enzymes were observed in cultures of the isolates NFC 1, NFC 2, NFC 4, NFC 5 and NFC 6 identified as belonging to the genus Aspergillus sp. Isolates NFR 1, NFR 2 and NFS1 were identified as belonging to the genus Rhizopus and NFC 3 belonging to the genus Cladosporium;...
September 2016
Halophile isolation to produce halophilic protease, protease production and testing crude protease as a detergent ingredient
Halophilic enzymes are potentially useful in many industries, particularly in food fermentation, pharmaceutical, textile, and leather for the treatment of saline and hypersaline wastewaters. In this study, a halophilic bacterium was isolated from saltpan environment, and was identified as Bacillus sp. Mk22 through biochemical test and 16S rRNA gene sequencing. During protease screening, the isolates produced 24 mm clear...
September 2016
Microbial community structure and chemical composition from dark earth in a native archaeological site of the lower Amazon
The microbial community structure from dark earth in a native archaeological site of the Lower Amazon was analyzed by PCR-DGGE, using 16S rRNA gene for prokaryote population and 18S rDNA and ITS regions (using clamp GC) for the eukaryote population. The bands were excised from gel and re-amplified for sequencing. The diversity found according to the region of amplification showed same profiles for the two primers pairs....
Advertisement
Advertisement
