بررسی و آنالیز ژن‌های پاسخگو به پاتوژن‌ها در سیب‌زمینی ‏

نوع مقاله : علمی پژوهشی

نویسندگان

1 گروه علوم و زیست فناوری گیاهی، دانشکده علوم و فناوری زیستی، دانشگاه شهید بهشتی، تهران، ایران.

2 گروه زیست فناوری گیاهی و بیوتکنولوژی، دانشکده علوم و فناوری زیستی، دانشگاه شهید بهشتی، تهران، ایران،شتی

3 گروه تحقیقات سبزیجات، موسسه اصلاح بذر و گیاه (‏SPII‏)، سازمان تحقیقات، آموزش و ترویج کشاورزی (‏AREEO‏)، کرج، ‏ایران.‏Education and Extension Organization (AREEO), Karaj, Iran,

4 مؤسسه تحقیقات اصالح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران.

چکیده

عملکرد سیب‌زمینی به عنوان یکی از منابع مهم در تأمین مواد اولیه غذایی و صنعتی در ایران و جهان، تحت تأثیر پاتوژن‌های مختلف می‌باشد. از بین این پاتوژن‌ها، PVY،PVX و نماتد جزء اصلی‌ترین عوامل کاهش عملکرد هستند. مکانیسم مولکولی زمینه‌ساز مقاومت بیماری در سیب‌زمینی تا حد زیادی ناشناخته باقی‌مانده است. در این مطالعه، آنالیز پروفایل‌های بیان ژن از مجموعه داده‌های GEO سه آلودگی پاتوژن در سیب‌زمینی انجام شد و صفات مورفولوژیکی تحت چهار تنش مورد بررسی قرار گرفت. برای این منظور 501 ژن مشترک با بیان متفاوت‌(DEGs) در دو آزمایش بر روی سیب زمینی بررسی شد. تجزیه و تحلیل غنی‌سازی عملکردی نشان داد کهDEGs بیش‌تر در چرخه نیتروژن و متابولیکی اولیه، اتصال GTP و اتصال GTPase نقش دارند که پس از تلقیح با پاتوژن‌های مختلف به طور مداوم تنظیم می‌شوند. بر اساس آنالیز صفات مورفولوژی تحت چهار تنش، PVY و برهم‌کنش PVX/PVY اختلاف معنی‌داری را با سایر تنش‌ها (PVX و نماتد) بر روی این صفات بر جای گذاشت. از داده‌های ریزآرایه مربوط به سیب‌زمینی استخراج شده از پایگاه داده GEO برای تجزیه و تحلیل شبکه هم‌بیان ژن وزن‌دار (WGCNA) استفاده شد. بر اساس نتایج شبکه 2 گروه (ماژول) ژنی به دست آمد که پروفایل بیان آن‌ها در پاسخ به چهار تنش فوق‌الذکر همبستگی بالایی با یک‌دیگر داشتند. نتایج این آزمایش بینش‌ ارزشمندی را در مورد مسیرها و ژن‌های تحت‌ تاثیر ویروس‌های PVY، PVX، PVX/PVY و نماتد سیب‌زمینی ارائه می‌دهد که ممکن است شناسایی ژن‌های مقاومت به بیماری‌های متعدد در سیب‌زمینی را تسهیل کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Examination and analysis of genes responsive to pathogens in potato

نویسندگان [English]

  • Abbas Saidi 1
  • Zahra Hajibrat 2
  • Ahmad Mosuapour Gorji 3
  • Rahim Ahmadvand 4
1 Department of Plant Biology & Biotechnology, Faculty of Life science and biotechnology, Shahid ‎Beheshti University, Tehran, Iran
2 Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran.
3 2Department of Vegetable Research, Seed and Plant Improvement Institute (SPII), Agricultural Research, ‎Education and Extension Organization (AREEO), Karaj, Iran.
4 Seed and Plant Improvement Institute (SPII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
چکیده [English]

Potato is one of the most important sources in the supply of food and industrial raw materials not only in Iran but also in the world which its yield is affected by various pathogens. Among these pathogens, PVY, PVX and nematode are the main factors of yield reduction. The molecular mechanism underlying disease resistance in potato remains largely unknown. In this study, analysis of gene expression profiles from the GEO data of three pathogen infections in potato was performed and morphological traits under four stresses were investigated. For this purpose, 501 common genes with different expression (DEGs) were studied in two experiments. Functional enrichment analysis showed that DEGs are more involved in nitrogen and primary metabolic cycle, GTP binding and GTPase binding, which are continuously up-regulated after inoculation with different pathogens. Based on the analysis of morphological traits under four stresses, PVY and PVX/PVY interaction left a significant difference with other stresses (PVX and nematode) on these traits. Potato microarray data extracted from GEO database were used for weighted gene co-expression network analysis (WGCNA). Based on the results of the network, 2 groups (modules) of genes were obtained whose expression profiles were highly correlated with each other in response to the above-mentioned four stresses. The results of this experiment provide valuable insight into the pathways and genes affected by PVY, PVX, PVX/PVY and potato nematode viruses, which may facilitate to identify genes resistant to many diseases in potato.

کلیدواژه‌ها [English]

  • Pathogen
  • WGCNA
  • Candidate
  • Module
  • virus
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