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(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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Antagonistic effect of endophytic isolate SA against S. We 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 – Wikipedia

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. Antibacterial effects of antibiotics compared with endophytic isolate Pcrr against S.

National Center for Biotechnology InformationU. Serine proteases from nematode and protozoan parasites: Or filter your current search. Published online Jun 3. This factor has a broad spectrum of activity against Gram-positive and specifically against Staphylococcus aureus MRSA. Multiple sequence alignment, molecular phylogeny and phylogenetic tree were performed using MEGA 5 software Fig.

Chemical formula 1 Decane Antagonistic bioactivity of an endophytic bacterium isolated from Epimedium brevicornu Maxim. Bacillus subtilis BS as an antagonist of potato blackleg and soft rot bacteria.

Differential display

It has been reported that many endophytic isolates provide beneficial effects to their hosts, like preventing disease development by synthesizing novel compounds and antifungal metabolites Khan and Doty The sterilized cubic stem parts were then divided into two pieces using a sterilized razor blade. Helal4, 5 and Sulaiman A. Articles from 3 Biotech are provided here courtesy of Springer. The antagonistic factor was isolated from the bacterial culture medium and purified by thin layer chromatography technique, then analyzed by GC—MS analysis.


Antagonistic effect of SA isolate against S. Chitinolytic activity of an endophytic strain of Bacillus cereus. They identified the isolated peptide as serine protease that possesses a broad range of antimicrobial activity.

Please review our privacy policy. The bacterial production and secretion of serine protease for antimicrobial function is not yet documented. Antibacterial activity of volatile component and various extracts of Spirulina platensis. This study focuses on the isolation of endophytic bacteria which are able to cease and inhibit the growth and spreading of methicillin resistant S.

Author information Article notes Copyright and License information Disclaimer. In this study, Bacillus endophyticus strain SA isolated from the inner tissue of the stem of the cultivated plant Salvadora persicaAsir, Kingdom of Saudi Arabia produces an antagonistic factor. The up or down regulated genes were excised from the gel and submitted for purification using a gel purification kit Qiagene, Germany and the purified PCR products were submitted for sequencing Macrogen Inc.

The cultivated endophytic bacterial isolates were transferred to new nutrient agar NA plates for purification.

Later treatment of MRSA strains could be achieved using the bioactive components produced by our endophytic isolate with prohibition of antibiotics especially chloramphenicol. Biocontrol of plant disease: We have used different primers that help to amplify different genes, whether over expressed or down expressed at the co-presence of antagonistic isolate and the pathogen.

Conclusion The products of endophytic bacterial isolate B. Verma and Verma reported the isolation and purification of antimicrobial peptide from celomic fluid of Indian earthworm Pheretima posthumous. The Bacillus subtilis genome sequence: Components in the ethanol extract of inhibition zone slices GC—MS chromatogram analysis of the ethanol extract of inhibition zone ddrrt s howed eight peaks that led to the identification of a number of compounds Fig.


About ten bacterial colonies with the same colony shape and characteristics were obtained.

Results and discussion Isolation and antimicrobial activity of endophytic bacteria 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.

The protein is well known as antimicrobial agent and was reported to be produced by plants, animals and insects. In vitro antifungal activities of inhibitors of phospholipases from the fungal pathogen Cryptococcus neoformans. Endophytic microbes embody pharmaceutical potential. After completion, a fraction of the PCR mixture was examined using 1.

This claim is highly supported by the conditions which allow this enzyme not only to be produced but also to be over expressed. The extraction of the active cpr produced by the endophytic isolate SA was done as follows: Plant surface sterilization is necessary to avoid the co-contamination with superficial bacteria.

After the incubation period, the S.

Received Dec 1; Accepted May In vitro antifungal activity of Argemone ochroleuca Sweet latex against some pathogenic fungi.