Molecular characterization and pathogenicity of cylindrocarpon destructans isolates from grapevines in Duhok, north Iraq
Other Title(s)
التوصيف الجزيئي و أمراضية الفطر Cylindrocarpon destructans المعزول من جذور كرمات العنب في دهوك شمال العراق
Joint Authors
Abd Allah, Samir Khalaf
Halim, Raid Abd al-Jabbar
Jubrail, Jaladat Muhammad Salih
Source
Issue
Vol. 32, Issue 2B (31 Dec. 2014), pp.147-165, 19 p.
Publisher
University of Basrah College of Science
Publication Date
2014-12-31
Country of Publication
Iraq
No. of Pages
19
Main Subjects
Topics
Abstract AR
عزلت عشر عزلات من الفطر Cylindrocarpon من جذور نبات كرمات العنب و التي جمعت من خمسة مزارع في محافظة دهوك شمال العراق.
أظهرت النباتات المصابة أعراض شملت : قلة النمو، صغر في حجم السيقان، اختزال في كتلة الجذور، و تخطط بلون بني إلى الأسود في الأوعية خاصة عند قاعدة الساق.
شخصت جميع العزلات على أنها تعود للفطر Cylindrocarpon destructans اعتمادا على الصفات المظهرية و الزرعية.
لغرض التأكد من تشخيص هذه العزلات استخدمت بادئات خاصة بالفطر لتضخيم the ITS region of nuclear ribosomal DNA (rDNA) containing ITS1, ITS2 and the intervening 5.8 rRNA genes of Cylindrocaropon و التي ميزت بشكل صحيح النوع المشخص.
اختبرت أمراضية الفطر تحت ظرف البيت الزجاجي و ذلك بغمر جذور النبات لنوعين من أصناف العنب لمدة ثلاثين دقيقة في معلق سبوري للفطر (تركيز 10 6X1 / ملم).
أظهرت النباتات المصابة أعراضا مرضية تمثلت باصفرار و تنقر في الأوراق فضلا عن اختزال في الشعيرات الجذرية.
تم تسجيل فرق معنوي في اختزال الوزن الجاف لكل من السيقان و الجذور للنباتات المصابة مقارنة مع السيطرة.
سجل هذا الفطر لأول مرة في العراق.
Abstract EN
Ten Cylindrocarpon isolates were detected from roots of declined grapevines (Vitis vinifera L.) plants collected from five vineyards in Duhok governorate, North Iraq.
The symptoms of the declined host including reduce vigor with small-sized trunks ,reduction in root biomass, black discoloration and brown to black streaks in wood mainly at the base of rootstock .Based on cultural and morphological characteristics, all isolates were identified as C.destrunctans.
These isolates were subjected to species-specific PCR assay.
Total genomic DNA was isolated from pure cultures of the isolates.
The average DNA yields ranged between 1.5-6.7 μg / ml with a purity 1.6-1.8.
The specific primers for C.
destructans (400 bp) were used to amplify the ITS region of nuclear ribosomal DNA (rDNA) containing ITS1, ITS2 and the intervening 5.8 rRNA genes of Cylindrocaropon produced appropriate and successful results with the selected isolates confirmed that all isolates were correctly identified as C.
destructans.
Pathogenicity of C.
destructans was tested under greenhouse conditions.
One-year old dormant rooted cuttings of the two grape cultivars, Reshmew and Taefi, were inoculated by dipping their roots for 30 min in the conidial suspension (1 × 106 conidia ml-1).
Infected vines showed reduced vigour with small leaves, interveinal chlorosis and necrosis.
Other symptoms included a reduction in root biomass and root hairs.
The severity of root mass reduction reached to 0.41 on Taefi (cv.) after five months of inoculation with significant difference compared with control treatment.
C.
destructans caused significant decrease in the fresh and dry weight of grapevine shoots and roots.
This fungus is reported for the first time in Iraq during this study.
American Psychological Association (APA)
Halim, Raid Abd al-Jabbar& Abd Allah, Samir Khalaf& Jubrail, Jaladat Muhammad Salih. 2014. Molecular characterization and pathogenicity of cylindrocarpon destructans isolates from grapevines in Duhok, north Iraq. Basrah Journal of Science،Vol. 32, no. 2B, pp.147-165.
https://search.emarefa.net/detail/BIM-542681
Modern Language Association (MLA)
Halim, Raid Abd al-Jabbar…[et al.]. Molecular characterization and pathogenicity of cylindrocarpon destructans isolates from grapevines in Duhok, north Iraq. Basrah Journal of Science Vol. 32, no. 2B (2014), pp.147-165.
https://search.emarefa.net/detail/BIM-542681
American Medical Association (AMA)
Halim, Raid Abd al-Jabbar& Abd Allah, Samir Khalaf& Jubrail, Jaladat Muhammad Salih. Molecular characterization and pathogenicity of cylindrocarpon destructans isolates from grapevines in Duhok, north Iraq. Basrah Journal of Science. 2014. Vol. 32, no. 2B, pp.147-165.
https://search.emarefa.net/detail/BIM-542681
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 161-164
Record ID
BIM-542681