شناسایی بیماری ویروسی رگبرگ روشنی زرد مرکبات در استان فارس

نوع مقاله : بیماری‌شناسی گیاهی

نویسندگان

1 بخش تحقیقات گیاه پزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی فارس، زرقان، ایران.

2 بخش تحقیقات گیاه پزشکی، مرکز تحقیقات و اموزش کشاورزی و منابع طبیعی فارس

3 بخش تحقیقات گیاهپزشکی،مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی فارس

چکیده

ویروس رگبرگ روشنی زرد مرکبات (Citrus yellow vein clearing virus, CYVCV) یکی از بیمارگرهای نوظهور در مرکبات است که در دو دهه اخیر در برخی از کشورهای دنیا و از جمله شمال ایران گسترش یافته است. طی سال 1402 علایم مشخص بیماری رگبرگ روشنی زرد مرکبات شامل کاهش رشد درخت همراه با رگبرگ روشنی و آبسوختگی نواحی رگبرگ‌های پشت برگ در تعدادی از درختان نارنج فضای سبز شهر شیراز مشاهده شد. آزمون واکنش زنجیره‌ای پلیمراز با نسخه‌برداری معکوس (RT-PCR) با استفاده از RNA استخراج شده از برگ‌های دارای علایم با آغازگرهای اختصاصی ژن پروتئین پوششی ویروس مذکور منجر به تکثیر قطعه‌ای در حدود 610 جفت‌باز در این نمونه‌ها شد. تحت همین شرایط در درختان بدون علایم چنین قطعه‌ای تکثیر نشد. تعیین توالی نوکلئوتیدی یکی از محصولات تکثیر یافته در RT-PCR و جستجو با برنامه بلاست در ژن‌بانک نشان داد که این توالی با توالی‌های متناظر آن در سایر جدایه‌های ویروس CYVCV بیشترین شباهت را دارد. این اولین گزارش از وقوع بیماری رگبرگ روشنی زرد مرکبات در استان فارس است. وجود این بیماری در درختان مرکبات سایر نقاط جنوب کشور قابل انتظار است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Identification of the citrus yellow vein clearing viral disease in Fars Province

نویسندگان [English]

  • Mohammad Mehdi Faghihi 1
  • Mohammad Salehi 2
  • Nazanin Sadat Ebadi 3
1 Plant Protection Research Department, Fars Agricultural and Natural Resources Research and Education Center
2 Plant Protection Research Department, Fars Agricultural and Natural Resources Research and Education Center
3 Plant Protection Research Department, Fars Agricultural and Natural Resources Research and Education Center
چکیده [English]

Citrus yellow vein clearing virus (CYVCV) is an emerging citrus pathogen that has spread to several countries, including north of Iran, over the past two decades. During 2023, the typical symptoms of the citrus yellow vein clearing disease including stunted growth, and vein clearing preceded by a water soaked appearance on the lateral veins of the abaxial leaf surface was observed in sour orange trees in an urban area in Shiraz (Fars Province). To detect the virus, reverse transcription polymerase chain reaction (RT-PCR) was conducted using a specific primer pair targeting the coat protein (CP) gene. An approximately 610 bp fragment of the coat protein gene was amplified from symptomatic sour orange samples but not from the samples of healthy trees. Sequencing of one PCR product and a BLASTn search of the resulting sequence against the GenBank (NCBI) database revealed the highest identity to sequences of Citrus yellow vein clearing virus isolates. This is the first report of the occurrence of citrus yellow vein clearing disease in Fars Province. The virus may be present in other parts of southern Iran, which calls for expanded diagnostic screening and monitoring.

کلیدواژه‌ها [English]

  • Citrus
  • Mandarivirus
  • RT-PCR
  • Shiraz
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