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Iranian Journal of Microbiology، جلد ۳، شماره ۲، صفحات ۸۴-۹۱
عنوان فارسی
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عنوان انگلیسی Minimal phenotypic test for simple differentiation of Xanthomonas campestris from other yellow-pigmented bacteria isolated from soil
چکیده انگلیسی مقاله Background and Objectives: Isolation of Xanthomonas campestris from soil has a wide range of applications from monitoring of phytopathogenic populations in soil to screening of improved xanthan-producing strains. Identification of Xanthomonas campestris and its pathovars requires pathogenicity tests in addition to phenotypic and molecular characterization. Materials and Methods: Thirty phenotypic tests were carried out on 57 yellow-pigmented bacterial isolates obtained from soil of cabbage farms after screening on Selective Xanthomonas (SX) agar and transferring on Yeast Malt agar. Absorption spectra of pigments and capability of biopolymer production were determined for the isolates. Some characteristics of the biopolymer produced and presence of a X. campestris-specific gene marker were investigated for nine putative X. campestris isolates. Results: The present study introduces a set of simple phenotypic tests including urease, acid production from sucrose, mucoid growth on 5% sucrose, starch hydrolysis, growth in 4% NaCl, motility and utilization of asparagine as sole carbon and nitrogen source for quick and inexpensive tentative identification of Xanthomonas campestris. Validation of these tests was confirmed in 100% of the cases by characterization of bacterial exopolysaccharide as xanthan and production of genus-specific xanthomonadin pigment. Moreover, tracking of hrc gene among putative X. campestris isolates gave positive results in 80% of cases. Conclusion: The Minimal simple phenotypic tests facilitate the screening and differentiation of putative X. campestris isolates from other false bacterial strains isolated from soil on semiselective SX agar.
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نویسندگان مقاله mr صعودی | mr soudi
national laboratory of industrial microbiology, department of biology, faculty of sciences, alzahra university, vanak, tehran, iran.

سازمان اصلی تایید شده: دانشگاه الزهرا (Alzahra university)

n علی مددی | n alimadadi
department of biology, faculty of sciences, alzahra university, vanak, tehran, iran.

سازمان اصلی تایید شده: دانشگاه الزهرا (Alzahra university)

p قدم | p ghadam
department of biology, faculty of sciences, alzahra university, vanak, tehran, iran.

سازمان اصلی تایید شده: دانشگاه الزهرا (Alzahra university)

نشانی اینترنتی http://ijm.tums.ac.ir/index.php/ijm/article/view/93
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/91/article-91-313459.pdf
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Articles
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