April 2014
Phylogenetic analysis of β subunit of the sulfite reductase gene from Colletotrichum lindemuthianum and fungi with different lifestyles
Previous studies have demonstrated that the machinery for sulfate assimilation influences the capacity of pathogenic microorganisms to invade a minor or major range of hosts, and this machinery appears to be dispensable when the lifestyle of the organism allows it. Colletotrichum lindemuthianum is the etiological agent of anthracnose, which is an important disease of beans (Phaseolus vulgaris) and an interesting model...
April 2014
Antimicrobial and antitumor activities of crude secondary metabolites from a marine fungus Penicillium Oxalicum 0312F1
The extract of fermentation product of the P. oxalicum strain 0312F1 was isolated through gel (Sephadex LH-20) column chromatography to give fractions A, B, C, D, E and F. Then, antimicrobial activity was evaluated by duel culture method and micro-dilution method. As a result, the water soluble extract of marine fungus Penicillium oxalicum 0312F1 had inhibitory activity against Alternaria solani. We also tested...
April 2014
Bacterial profiles and antibiotic resistance patterns in Xiangya Hospital, China
The aim of this study was to characterize the bacterial profiles and antibiotic-resistance patterns in Xiangya Hospital in 2012, and provide guidance for rational use of antimicrobial agents. Clinical strains were identified by the Vitek 2 automatic microbe analysis system and API test strips, and minimal inhibitory concentrations (MICs) for each antibiotic agent was determined. Data were analyzed in the WHONET 5.4...
April 2014
Distribution and characterization of microbial communities in Chrysoperla zastrowi sillemi, an important predator of sap sucking insect pests
Common green lacewing, Chrysoperla zastrowi sillemi is one of the important biological control agents and is used effectively to manage various insect pests. Chrysopid predators are found to harbor many endosymbiotic yeasts and bacteria. Keeping this in view, a study on the distribution of yeast and bacteria in the adult diverticulum and larval gut was conducted using transmission electron microscopy (TEM) and molecular...
April 2014
Biological control of citrus green mould, Penicillium digitatum, by antifungal activities of Streptomyces isolates from agricultural soils
Streptomyces strains can control postharvest citrus fruit diseases caused by Penicillium digitatum. One hundred and ten (110) Streptomyces strains were isolated from agricultural soils and screened against P. digitatum. The antagonistic activities of the isolates were determined through dual culture technique. In the 110 isolates, only strain 328 showed strong antifungal inhibitory effects. Streptomyces strain 328...
April 2014
The inhibitory effect of different chemical food preservatives on the growth of selected food borne pathogenic bacteria
The inhibitory effect of different chemical food preservatives (potassium metabisulphite, sodium benzoate, citric acid, ascorbic acid and potassium sorbate) on the growth of selected food borne pathogenic bacteria (Staphylococcus aureus, Klebsiella aerogenes, Proteus mirabilis, Pseudomonas aeruginosa and Escherichia coli) were investigated using agar diffusion technique. The concentrations used on test bacteria ranged...
April 2014
Bacterial fermentation of Lemna sp. as a potential substitute of fish meal in shrimp diets
Lemna sp. flour was fermented with bacteria as a source of protein for the preparation of white leg shrimp diets. Pediococcus pentosaceus was isolated from Litopenaeus vannamei and Litopenaeus stylirostris juveniles and characterized with biochemical (Gram stain, hemolytic activity, extracellular enzymatic activity, hydrophobicity, bacterial growth kinetics, salt tolerance, and cell count) and molecular (16S ribosomal...
April 2014
In-vitro antimicrobial and synergistic properties of water soluble green and black tea extracts
Green and black teas extracts are known for their antibacterial activity against many pathogenic microorganisms. These studies have been necessitated by the need to combat the recent rise of drug-resistant human pathogens which is becoming a common occurrence in the world making easily manageable infections to become life threatening illnesses. This study evaluated the antimicrobial activity of water soluble green and...
April 2014
Effect of the endophyte Ceratobasidium stevensii on 4-HBA degradation and watermelon seed germination
A preliminary trial indicated that the replanting obstacle of watermelon could be mitigated by the addition of the endophytic fungus Ceratobasidium stevensii B6 to the soil. The mechanism by which this treatment reduced the obstacles to continuous cropping was not clear, although the phenolic acids secreted by watermelon are a known problem. Consequently, we investigated the degradation of phenolic acids by C....
April 2014
Effect of different grains and alternate substrates on oyster mushroom (Pleurotus ostreatus) production
The present investigation was undertaken by using various grains for spawn production, and waste paper, wood chips were used in comparison with wheat husk for mushroom production during 2010-2011 at Department of Botany, Singhania University, Rajasthan. The results of the analysis of variance showed that diameter of colony extension in various grains are different and were significantly affected by substrate type. The...
Advertisement
Advertisement
