گزارش‌ها و میزبان‌های جدید از گونه‌های Exserohilum و Pyrenophora در ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 فارغ‌التحصیل دکتری گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران

2 استاد گروه گیاه‌پزشکی، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران

3 استادیار مرکز آموزش عالی شهید باکری، میاندوآب، دانشگاه ارومیه، ارومیه، ایران

چکیده

در راستای تاکسونومی گونه‌های جنس‌های Exserohilum و Pyrenophora، نمونه‌های برگی آلوده گیاهی طی سال‌های 94-1392 از استان‌های مختلف کشور (آذربایجان غربی و شرقی، مازندران، گیلان، اصفهان و خوزستان) جمع‌آوری گردید. تعداد 48 جدایه از جنس‌های Exserohilum (26 جدایه) و Pyrenophora (22 جدایه) از گونه‌های مختلف گیاهی جداسازی گردید. جدایه‌ها براساس ویژگی‌های ریخت‌شناختی و توالی‌یابی‌ ناحیه rDNA ITS1-5.8S-ITS2 و ژن GPDH (Glyceraldehyde-3-phosphatedehydrogenase) شناسایی شدند. براساس داده‌های ریخت‌شناختی و مولکولی، چهار گونه از جنس Exserohilum شامل E. monoceras (سه جدایه)، E. oryzicola (پنج جدایه)، E. rostratum (12 جدایه)، E. turcicum (شش جدایه) و سه گونه از جنس Pyrenophora شامل P. graminea (19 جدایه)، P.dictyoides (یک جدایه) و P. lolii (دو جدایه) شناسایی شدند. گزارش گونه E. oryzicola برای مایکوبویتای ایران جدید می‌باشد. شرح کامل به همراه تصاویر برای گونه جدید و همچنین میزبان‌های جدید برای دو گونه E. rostratumوP. loliiمعرفی می‌گردد.
 
 

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