(a) Principle of the reactions underlying DDRT-PCR analysis. (N) Any of the four nucleotides G, A, T, or C. V can be any nucleotide besides T. (B) Any nucleotide. Recently, a new approach has successfully been developed: Differential-Display Reverse Transcription-PCR (DDRT-PCR). This technique has been proven to. Establishment of infection and disease implies modifications in the genetic programmes of the cell systems that are involved and the differential expression of.

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Bacillus subtilis BS as an antagonist of potato blackleg ocr soft rot bacteria. The antagonistic factor was isolated from the bacterial culture medium and purified by thin layer chromatography technique, then analyzed by GC—MS analysis. National Center for Biotechnology InformationU. Moustafa1, 2 Tarek H.

In addition, these microorganisms play an important role to protect their host plants from phytopathogenic fungi and bacteria Emmert and Handelsman Europe PMC requires Javascript to function effectively. Characterization of bacterial endophytes of sweet potato plants. Identification of the producer strain was performed using the partial nucleotide sequence of 16S rRNA gene, which indicated that this strain is identical to B.

Endophytic bacteria in Coffea arabica L. About ten bacterial colonies with the same colony shape and characteristics were obtained. The grown separate pure colonies of bacterial isolate were tested for their antagonistic activity against Klebsiella pneumoniaeEscherichia coli and methicillin resistant S. Components in the ethanol extract of inhibition zone slices GC—MS chromatogram analysis of the ethanol extract of inhibition zone parts s howed eight peaks that led to the identification of a number of compounds Fig.

It is well known that, the isolation of bacteria that are capable of invading the inner tissues of a certain plant is a critical process. Unveiling of up-regulated or down-regulated genes Any external effect on the organism can affect its genetic behavior in a way of over or down expression of the genes according to the kind of the stimulant.

In our study, four up-regulated and down-regulated genes were chosen for gel purification and sequencing. These results confirm the common concept regarding the ability of microorganism to develop new strategies to resist more and more antibiotics, which invite the researchers to find new and effective antimicrobial agents. Khan Z, Doty SL.


Molecular detection of the antagonistic factor using differential display RT-PCR technique To investigate the upregulated or downregulated ddrf during the antagonistic process, both of the pathogenic and the antagonistic bacteria were grown either separately on two different nutrient agar plates or close to each other on the same plate. Phytochemical and pharmacological screening of Sterculiaceae species and isolation of antibacterial compounds.

The bacterial production and secretion of serine protease for antimicrobial pr is not yet documented. The up or down regulated genes were excised from the gel and submitted for purification using a gel purification kit Qiagene, Germany pcd the purified PCR products were submitted for sequencing Macrogen Inc. Impact of isolate SA activity in comparison with different antibiotics The antagonistic activity of the endophytic bacterial isolate was compared with ten different known bacterial antibiotics against S.

They are able to antagonize the pathogenic microbes through the competition for space and nutrients, production of antibiotics, production of hydrolytic enzymes and by inducing plant defense mechanisms Ocr et al. We have used different primers that help to amplify different genes, whether over expressed or drdt expressed at the co-presence of antagonistic isolate and the pathogen.

To investigate the upregulated or downregulated genes during the antagonistic process, both of the pathogenic and the antagonistic bacteria were grown either separately on two different nutrient agar plates or close to each other on the same plate. Chitinolytic activity of an endophytic strain of Bacillus cereus.

Acknowledgments Pcd would like to thank King Khalid University, Faculty of Science, Biology Department for supporting this work with all the required chemicals and equipments.

Differential display

Both of the pathogenic strain S. They identified the isolated peptide as serine protease that possesses a broad range of antimicrobial activity. They play an important role in the plant health preservation in addition to their ability to supplement their host plants with inorganic nutrients via nitrogen fixation and iron solubilization processes Porras-Soriano et al. Application of differential display RT-PCR revealed that the isolate was able to up-regulate a gene with serine protease like protein.


Either your web browser doesn’t support Javascript or it is currently turned off. Eicosane and ethyl acetate extract of Spirulena platensis consisted of heptadecane and tetradecane showed antimicrobial activities against some Gram positive and Gram negative bacteria and Candida albicans Ozdemir et al.

Multi-target and medium independent fungal antagonism by hydrolytic enzymes in Paenibacillus polymyxa and Bacillus pumilus strains from barley rhizosphere. Antagonistic effect of SA isolate against S. Earthworm- a potential source for stable and potent antimicrobial compounds- isolation and purification study.

Differential display – Wikipedia

Conclusion The products of endophytic bacterial isolate B. In vitro antifungal activities of inhibitors of phospholipases from the fungal pathogen Cryptococcus neoformans. This factor has a broad spectrum ddrrt activity against Gram-positive and specifically against Staphylococcus aureus MRSA.

Both of sterile filter paper discs were loaded with the isolate SA and ten different antibiotic discs. Antibacterial effects of antibiotics compared with endophytic isolate SA against S. Open in a separate window. The collected agar pieces clear zones were assumed to contain the active materials, and were extracted using absolute ethanol.

Endophytes have been defined as microorganisms bacteria or fungi which for all or part of their life cycle reside edrt the inner parts of plant tissues, but cause no symptoms of disease Vega et al. Of the eight compounds identified in the inhibition zone, the prevailing compounds were dodecane The Bacillus subtilis genome sequence: In this study, Bacillus endophyticus strain SA isolated from the inner tissue of the stem of the cultivated plant Salvadora persica, Asir, Kingdom of Saudi Arabia produces an antagonistic factor.

In vitro antifungal activity of Argemone ochroleuca Sweet latex against some pathogenic fungi. Extraction of the bioactive metabolites produced by SA isolate The extraction of the active metabolites produced by the endophytic isolate SA was done as follows: The products of endophytic bacterial isolate B.

Isolation, gene cloning and expression profile of a pathogen recognition protein: It is widely drrt by Bacillus species and found tremendous applications in pharmaceuticals Bhunia et al.

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