September 2012
Prospectus of phosphate solubilizing microorganisms and phosphorus availability in agricultural soils: A review
Phosphate solubilizing microorganisms (PSMs) offer an ecologically acceptable mean for converting insoluble phosphate to soluble forms making them available for plants to absorb. Several bacterial strains (Pseudomonas, Bacillus, Rhizobium and Enterobacter) and fungal strains (Aspergillus and Penicillium) have so far been recognized as powerful phosphate solubilizers. Insoluble phosphates...
September 2012
Chitosan as an alternative to control phytopathogenic fungi on fruits and vegetables in Mexico
The control of phytopathogenic fungi has been carried out by synthetic chemical fungicides for many years. However, some studies showed the potential risk they present to the environment and human health. The use of chitosan as an alternative to control phytopathogenic fungi during postharvest is important particularly in Mexico because this polymer exhibits antifungal activity against several important pathogens...
September 2012
Effects of probiotics and antibiotics on diversity and structure of intestinal microflora in broiler chickens
Probitics and antibiotics are all used as growth promoters in domestic animal breeding and poultry raising. In the present study, the effects of probiotics and antibiotics on structure and diversity of the intestinal microflora of broiler 817 was investigated. Ammonia and sulfured hydrogen in fecal were detected. Then the intestinal microflora was analyzed by the pour plate method and polymerase chain...
September 2012
Production of k-carrageenase by Cellulosimicrobium cellulans isolated from Egyptian Mediterranean coast
The screening for isolates was done from different sources: sea water, sediment and algal tissue. Only two strains showed the capability of degrading k-carrageenan. Both strains were identified genetically using 16S rDNA. The isolates were classified to beCellulosimicrobium cellulans and Isoptericola sp. Morphological and biochemical properties for C. cellulans were selected for the study....
September 2012
Changes in total phenol, total protein and peroxidase activities in melon (Cucumis melo L.) cultivars inoculated with Rhizoctonia solani
The intensive exploration of melon crops in Sistan region favors the occurrence of root diseases such as the Rhizoctonia canker, caused by Rhizoctonia solani. In this study, eighteen melon cultivars were challenged against the pathogen aiming at selecting those potentially useful for breeding programs and/or integrated disease management. Seeds were planted in infested soil (50 mg of colonized...
September 2012
Molecular diversity analysis of planctomycete-like bacteria in inosine fermentation and municipal wastewater treatment systems
In this study, the diversity of planctomycete-like bacteria in an inosine fermentation and amunicipal wastewater treatment plants was investigated by denaturing gradient gel electrophoresis (DGGE) of nested polymerase chain reaction (nested PCR) amplified 16S rRNA gene fragments using planctomycete-specific forward primer and a bacteria universal reverse primer. The bacterial community...
September 2012
Combined effect of ultrasound and selected essential oil constituents on Escherichia coli O157:H7 and Listeria monocytogenes reduction in orange juice
The purpose of this study was to determine the combined effects of 20 kHz ultrasound (US) and selected essential oil (EO) constituents (eugenol, linalool and cinnamaldehyde:200, 400, 800 and 1000 µl/l) on the reduction of Escherichia coli O157:H7 and Listeria monocytogenes in orange juice (OJ) at different temperatures. Combined effect of citric acid and US on the...
September 2012
Intra population diversity in Rhizocotonia bataticola causing dry root rot of chickpea (Cicer arietinum L.) in India
Fifty isolates of dry root rot pathogen Rhizoctonia bataticola collected from different agro-climatic zones in India were evaluated for the degree of subdivision in isolates level. The isolates showed variability in pathogenicity test. Genetic characteristics were analyzed based on the sequence of the rDNA-internal transcribed spacer (ITS) region. The phylogenetic tree based on rDNA-ITS analysis showed that...
September 2012
Diversity among some Egyptian isolates of Rhizoctonia solani based on anastomosis grouping, molecular identification and virulence on common bean
Nine isolates of Rhizoctonia solani were obtained from different plant types (common bean, broad bean, bell pepper, tomato and cucumber). The obtained isolates were assigned to AG according to hyphal anastomosis. Of these, six isolates belonged to AG 2-2 IIIB, while the other three isolates belonged to AG 4 HG-I. Molecular identification using18S-rRNA gene showed that all the isolates...
September 2012
Epidemiology of cutaneous mycosis in the Medina region of Saudi Arabia correlated with studying the effect of light-induced gold nanoparticles on the growth of dermatophytes in vitro
A total of 145 clinical cases were diagnosed, 137 were found to be positive cases of cutaneous fungal infection. Among all one hundred and thirty seven positive cases,superficial mycoses cases of tinea versicolor caused by Malassezia furfur were found to be the most frequent representing (42.3%) of the total, the remaining (51.1%) and (6.6%) were cases of cutaneous mycoses caused by dermatophytes...
September 2012
Isolation and characterization of lytic phage against Lactococcus lactis RP359, kem-buk-nud starter culture
Starter culture-infecting bacteriophages have become a major problem of food fermentation because of their ability to ruin fermentation. This study aims to isolate and characterize a phage having ability to infect Lactococcus lactis RP359, a starter culture of kem-buk-nud, a traditional Thai fermented food. A lytic phage fRP359 was isolated from a kem-buk-nud sample and produced clear plaques of 1 to 1.5...
September 2012
Influence of abiotic stress on β-D-glucosidase activity of two typical Oenococcus oeni strains in China
β-D-Glucosidase is one of the most interesting glycosidases for hydrolysis of glycoconjugated precursors to release active aromatic compounds in musts and wines. SD-2a and 31MBR are two typical Oenococcus oeni strains widely used in winemaking in China. Up to now, there is still limited information regarding the β-D-glucosidase activity of the two strains. β-D-Glucosidase activity of...
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