Do you want to publish a course? Click here

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

تعريف البكتريا Pectobacterium المسببة لمرض العفن الطري لنبات الثوم في سورية

1479   0   48   0 ( 0 )
 Publication date 2011
  fields Plant Protecion
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

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
rate research

Read More

The effect of some essential oils taken from Cinnamomum zeylanicum, Citrus limonum and Rosmarinus Officinalis was investigated in relation to the growth of bacteria Paenibacillus larvae which causes American Foulbrood disease that affects world hon ey bees Apis mellifera L. The study was carried out in the laboratories of the Faculty of Agriculture, Damascus University from 2012 till 2013. This is in order to contribute to preparing an integrated pest management program for American Foulbrood disease. The oils were extracted from the plants using steam distillation. The effects of the concentrations of oils on the growth of P. larvae were tested between (3.90625 - 500 μg/ml) using agar disc diffusion in petri plates. Results showed that the essential oils used stop the growth of P. larvae in some of their concentrations. The minimal inhibitory concentrations which stop the growth of P. larvae of the oils of Cinnamomum zeylanicum, Citrus limonum and Rosmarinus officinalis were recorded at 31.25 μg/ml, 62.5 μg/ml, 125 μg/ml respectively.
Olive trees are grown in many regions of Syria, especially in wet regions where the olive knot disease (Pseudomonas savastanoi pv.savastanoi ) prevails .Symptoms similar to those found on olive trees have been observed on myrtle shrubs (Myrtus com munis) growing naturally in some olive-grown regions. This study aimed at identifying the pathogen isolated from myrtle plant, and testing the pathogenicity of these isolates on olive trees. Morphological, biochemical and serological tests of bacteria isolated from myrtle showed similarity to those from olive and other hosts. Pathogenicity tests showed that the myrtle isolates were pathogenic on both myrtle and olive trees. Myrtle could be considered as a source of inoculum for the olive knot disease.
Family Vespidae considered as Widespread globally and belong to the order Hymenoptera called wasps, It contains about 5000 species belong to six subfamilies. Members of this family differ in terms of style of living and life cycle and the type of diet. Colors overlap between the black and yellow or red, yellow or three together. This study examined six species belong to the four genera (Vespa, Vespula, Poistes, Delta) and three sub-families are: Sub.Fam. Vespinae, Sub.Fam. Polistinae, Sub.Fam. Eumeninae, gathered from many different areas of the province of Latakia environment (15 area) from altitudes ranging from sea level to a height of 1000 meters, over a period of time it extends from April through October of 2015.
This study was conducted in the Syrian coastal area to detect tomato seedlings damping-off disease, to identify and isolate fungi responsible of the disease and to evaluate their pathogenicity. Samples were collected from nurseries and greenhouses from four locations (Jableh and Ras Elain from Lattakia and Hressoun and Majdalon Elbahr from Tartous).
A survey was conducted to determine the frequency and mean densities of plant-parasitic nematodes associated with cotton crop (Gossypium hirsutum L.) after the harvesting season 2008 in Syria. Results showed that twelve genera of plant-parasitic n ematodes were found associated with cotton crop roots. The distribution of nematode genera varied between the Syrian governorates, Pratylenchus spp., Meloidogyne spp. and Rotylenchulus infect most cotton fields in all syrian governorates. The distribution was relatively uniform between the governorates. They occurred in 80.7%, 46.6% and 32.95%, respectively, of tested fields with an average density of 137.2, 59.6 and 574.3 juveniles/100 cm3 soil, respectively. meanwhile, the genus Tylenchorhynchus was found in central region only. Rotylenchulus was more prevalent in the heavier soils, but Meloidogyne. was not influenced by soil type. The other nematode genera detected in this survey were less frequent, their frequency of occurrence were for Hoplolaimus (19.3%), Scutellonema (31.8%), Tylenchorhynchus (31.8%), Helicotylenchus (30.7%), Rotylenchus (36.4%), Tylenchus (18.2%), Xiphinema (3.4%).
comments
Fetching comments Fetching comments
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا