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نوع مقاله : علمی پژوهشی

نویسندگان

1 پژوهشکده ژنتیک و زیست‌فناوری کشاورزی طبرستان، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران.

2 گروه ژنتیک مولکولی، مؤسسه ژنتیک گیاهی و تحقیقات گیاهان زراعی لیبنیز (IPK)، آلمان

3 پژوهشکده ژنتیک و زیست فناوری کشاورزی طبرستان، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری ایران.

4 گروه ژنتیک مولکولی، موسسه ژنتیک گیاهی و تحقیقات گیاهان زراعی لیبنیز (IPK)

چکیده

پروتئین فسفاتازهای (PP2Cs) 2C، نقشی کلیدی در بیان ژن‌های پاسخگو به تنش از موجودات پست پروکاریوتی تا یوکاریوت‌های عالی ایفا می‌نمایند. در این مطالعه، بررسی بیوانفورماتیکی اعضای خانواده ژنی PP2C به منظور شناسایی و تجزیه و تحلیل ژن‌های اورتولوگ مرتبط با تنش در ژنوم گیاه هالوفیت علفی یک‌لپه Aeluropus littoralis انجام شد. در مجموع 34 ژن AlPP2C بر اساس ساختار اختصاصی دمین PP2C، در ژنوم این گیاه شناسایی گردید. در درخت فیلوژنتیکی ترسیم شده از پروتئین‌های AlPP2C همراه با پروتئین‌های thaliana Araboidopsis، پروتئین‌های AlPP2C و AtPP2C در ده گروه مختلف بر مبنای همولوژی طبقه‌بندی شدند. تجزیه و تحلیل موتیف‌های حفاظت‌شده پروتئین‌های خانواده AlPP2C نشان داد که گروه‌بندی فیلوژنتیکی از تطابق بالایی با الگوی پراکنش موتیف‌های هر گروه داشت. تجزیه و تحلیل ساختار اگزون - اینترون توالی ژنی نشان داد که اعضای این خانواده به لحاظ آرایش و فراوانی اگزون‌ها از الگوی متفاوتی برخوردارند. شناسایی و طبقه‌بندی عناصر تنظیمی سیس در هشت گروه مختلف صورت گرفت که از مهم‌ترین عناصر سیس مرتبط به تنش می‌توان به موتیف‌های ABRE،MBS ،DRE ، STRE و LTR اشاره نمود. بررسی الگوی ترانسکریپتوم (RNA-Seq) نشان داد که ژن‌های AlPP2C الگوهای بیان متفاوتی در پاسخ به تنش شوری و شرایط بازیابی در دو بافت برگ و ریشه ارائه نمودند که احتمالا بیانگر مسیرهای تنظیمی متفاوت در بیان این ژن‌هاست. الگوی بیان مشاهده شده ژن AlPP2C4 در بافت ریشه، حاکی از تنظیمات بیان بافت - اختصاصی این ژن می‌باشد. این تحقیق با شناسایی ژن‌های اورتولوگ PP2C مرتبط با تنش در گیاه آلورورپوس لیتورالیس، اطلاعات ارزشمندی را برای مطالعات عملکرد ژنی و فرایندهای بیولوژیکی ژن‌های PP2C فراهم می‌آورد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

An investigation of the protein phosphatase 2C (AlPP2C) gene family in halophile plant, Aeluropus littoralis

نویسندگان [English]

  • Seyyed Hamidreza Hashemi-petroudi 1
  • Samira Mohammadi 2
  • Esmaeil Bakhshandeh 3
  • Markus Kuhlmann 4

1 1. Department of Genetic Engineering and Biology, Genetics and Agricultural Biotechnology Institute of Tabarestan (GABIT), Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran, P. O. Box 578

2 2. RG Abiotic Stress Genomics/ RG Heterosis, Department Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK). Germany

3 Genetic and Agricultural Biotechnology Institute of Tabarestan (GABIT), Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran, P. O. Box 578

4 RG Abiotic Stress Genomics/ RG Heterosis, Department Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)

چکیده [English]

From prokaryotes to higher eukaryotes, protein phosphatase 2Cs (PP2Cs) play a critical role in the stress response. For the purpose of identifying the AlPP2C gene and examining its expression, Aeluropus littoralis, a salt-secreting halophytic grass belonging to the Poaceae family, was genome-wildly analyzed. Based on the unique structure of the PP2C domain, 34 AlPP2C genes were discovered and classified into ten evolutionary branches based on homology with Arabidopsis thaliana. According to exon-intron structural analyses, they possessed a wide range of exon counts. AlPP2Cs shared similar motif organization in the same evolutionary branches based on motif distribution. The motifs ABRE, MBS, DRE, STRE, and LTR, which are related with stress, were discovered in the promoter region of the AlPP2C. AlPP2Cs displayed varied expression patterns in leaf and root tissues in response to salt stress and recovery conditions, according to transcriptome analyses. The AlPP2C4 gene is only expressed in the root tissues. These results expand our understanding of the PP2C gene family and provide valuable information for future research on PP2Cs molecular function and biological processes studies.

کلیدواژه‌ها [English]

  • Abiotic stress
  • Expression pattern
  • Halophyte
  • Salt stress
  • Signaling
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