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Register a new userIdentification 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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Damascus University ورقة بحثية
Publication date
2011
fields
Plant Protecion
and research's language is
العربية
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Shamra Editor
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ظهرت أعراض عفن طري في بعض الحقول المزروعة بمحصول الثوم في منطقة الكـسوة (ريـف دمشق)، و عند دراسة انتشار هذا المرض في أربعة حقول راوحت نـسبة الإصـابة بـين 91.2 % إلـى 59.5 % عزلت 55 عزلة بكتيرية من عينات مصابة جمعت خلال موسمي الزراعة 2005 و 2006 ، بينت نتائج خمسة اختبارات بيوكيميائية أن 22 عزلة كانت محللة للبكتين و استطاعت إحداث المرض على نبات الثوم و أعطت أعراضاً مرضية مشابهة لتلك الملاحظة في الحقل، مما أمكن تصنيفها بأنهـا تنتمـي إلـى جنس Pectobacterium . و لتحديد الأنواع التي تنتمي لها هذه البكتريا وصفت تجاه تـسعة اختبـارات بيوكيميائية التي سمحت بتصنيف 7 عزلات علـى أنهـا .subsp carotovorum Pectobacterium carotovorum و 6 عــزلات انتمــت إلــى atrosepticum Pectobacterium و عزلــة واحــدة إلى chrysanthemi Dickeya) chrysanthemi Pectobacterium) و 6 عزلات لم تُحـدد الأنـواع التي تنتمي لها و عزلتين لم تختبرا. تشير هذه النتائج إلى عزل و تعريـف البكتريـا Pectobacterium المسببة للعفن الطري على محصول الثوم أول مرة في سورية.
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.
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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