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Identification of Pectobacterium Bacteria Causing Soft Rot on Garlic Plant in Syria

تعريف البكتريا Pectobacterium المسببة لمرض العفن الطري لنبات الثوم في سورية

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 Publication date 2011
  fields Plant Protecion
and research's language is العربية
 Created by Shamra Editor




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Symptoms of soft rot showed in some fields cultivated with garlic crop in the Kissweh region (Damascus countryside). Studying this disease, found that the incidence rates ranging between 2.91% to 5.59%. 55 bacterial isolates were isolated from infected samples collected during the seasons 2005 and 2006. The results of five biochemical tests showed that 22 isolates were pectinolitic and they were pathogenic to garlic plant and gave symptoms similar to those observed in the field, theses isolates were classified as belonging to the genus Pectobacterium. To determine the species of the bacteria, they have been characterized towards nine biochemical tests, which allowed the classification of 7 isolates as Pectobacterium carotovorum subsp. carotovorum, 6 isolates belonged to Pectobacterium atrosepticum, one isolate to Dickeya chrysanthemi (Pectobacterium chrysanthemi), 6 isolates have not been classified and 2 isolate did not characterized . These results have shown for the first time the isolation and identification of the Pectobacterium bacteria causing soft rot on garlic crop in Syria.


Artificial intelligence review:
Research summary
تظهر أعراض العفن الطري في بعض الحقول المزروعة بمحصول الثوم في منطقة الكسوة (ريف دمشق). أظهرت دراسة هذا المرض أن معدلات الإصابة تتراوح بين 2.91٪ إلى 5.59٪. تم عزل 55 عزلة بكتيرية من العينات المصابة التي تم جمعها خلال موسمي 2005 و2006. أظهرت نتائج خمسة اختبارات بيوكيميائية أن 22 عزلة كانت مكونة للبكتين وكانت ممرضة لنبات الثوم وأعطت أعراضًا مشابهة لتلك التي لوحظت في الحقل، وتم تصنيف هذه العزلات على أنها تنتمي إلى جنس Pectobacterium. لتحديد نوع البكتيريا، تم تصنيفها بناءً على تسعة اختبارات بيوكيميائية، مما سمح بتصنيف 7 عزلات كـ Pectobacterium carotovorum subsp. carotovorum، و6 عزلات كـ Pectobacterium atrosepticum، وعزلة واحدة كـ Dickeya chrysanthemi (Pectobacterium chrysanthemi)، و6 عزلات لم يتم تصنيفها، وعزلتين لم يتم تحديدهما. أظهرت هذه النتائج لأول مرة عزل وتحديد بكتيريا Pectobacterium المسببة للعفن الطري على محصول الثوم في سوريا.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة هامة في فهم الأمراض البكتيرية التي تصيب محصول الثوم في سوريا. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل لو تم توسيع نطاق الدراسة لتشمل مناطق جغرافية أخرى في سوريا للحصول على صورة أكثر شمولية عن انتشار المرض. ثانيًا، كان من الممكن تقديم معلومات أكثر تفصيلية حول الظروف البيئية التي قد تسهم في انتشار المرض. وأخيرًا، كان من الممكن استخدام تقنيات حديثة مثل تحليل الجينوم الكامل للحصول على تصنيف أكثر دقة للبكتيريا المعزولة.
Questions related to the research
  1. ما هي نسبة الإصابة بالعفن الطري في حقول الثوم في منطقة الكسوة؟

    تتراوح نسبة الإصابة بالعفن الطري بين 2.91٪ إلى 5.59٪.

  2. كم عدد العزلات البكتيرية التي تم عزلها من العينات المصابة؟

    تم عزل 55 عزلة بكتيرية من العينات المصابة.

  3. ما هي الأنواع البكتيرية التي تم تحديدها في الدراسة؟

    تم تحديد 7 عزلات كـ Pectobacterium carotovorum subsp. carotovorum، و6 عزلات كـ Pectobacterium atrosepticum، وعزلة واحدة كـ Dickeya chrysanthemi (Pectobacterium chrysanthemi)، و6 عزلات لم يتم تصنيفها، وعزلتين لم يتم تحديدهما.

  4. ما هي أهمية هذه الدراسة؟

    أظهرت هذه الدراسة لأول مرة عزل وتحديد بكتيريا Pectobacterium المسببة للعفن الطري على محصول الثوم في سوريا، مما يساهم في فهم أفضل للأمراض التي تصيب هذا المحصول الهام.


References used
Safadi, B.; N. MirAli; and M. I. E. Arabi. (2000). Improvement of garlic (Allium sativum L.) resistance to white rot and storability using gamma irradiation induced mutations. Journal of Genetics and Breeding, 54:175-181
Barkat F. M., Kararah M. A, Mikhail M. S. and Fouly H. M. (1985). Role of Three species of Bacteria in decaying garlic bulb. Egypt. J. phytopathol., vol. 17, No. 2, pp. 115-129
Bin Li., Rong Rong Yu., Shan Hong Yu., Wen Qiu., Yuan Fang and Guan Lin Xie. (2009). First Report on Bacterial Heart Rot of Garlic Caused by Pseudomonas fluorescens in China. Plant Pathol. J. 25(1) : 91-94
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