با همکاری مشترک دانشگاه پیام نور و انجمن بیوتکنولوژی جمهوری اسلامی ایران

نوع مقاله : علمی پژوهشی

نویسندگان

1 دانشجوی دکتری ژنتیک و به‌نژادی گیاهی، دانشکده کشاورزی، دانشگاه ارومیه.

2 دانشگاه ارومیه

3 دانشیار گروه زیست فناوری مولکولی گیاهی، پژوهشگاه ملی مهندسی ژنتیک و زیست‌فناوری، تهران.

4 دکتری بیماری‌شناسی گیاهی، پژوهشگاه ملی مهندسی ژنتیک و زیست‌فناوری، تهران.

چکیده

شوری یک تنش اصلی غیر زیستی محدودکننده رشد و بهره‌وری گیاهان در بسیاری از مناطق جهان است که به دلیل افزایش استفاده از آب بی-کیفیت برای آبیاری و شوری خاک ایجاد می‌شود. سازگاری یا تحمل گیاه به تنش شوری شامل تغییر فرآیندهای فیزیولوژیکی و مسیرهای متابولیکی و فعال‌سازی شبکه‌های مولکولی یا ژنی است. در این مطالعه از الکتروفو دوبعدی برای شناسایی پروتئین‌های پاسخ‌دهنده به تنش شوری در ذرت استفاده شد. دو لاین ذرت با واکنش متفاوت به تنش شوری R10 (متحمل) و S46 (حساس) انتخاب شدند. در مرحله هشت برگی، تیمار شوری 8 دسی‌زیمنس بر متر بر گیاهان به مدت 20 روز اعمال شد و سپس پروتئین‌های برگ، استخراج گردید. لکه‌هایی با بیش از 5/1 برابر افزایش یا کاهش بیان جدا گردیدند و توسط دستگاه طیف‌سنجی جرمی شناسایی و تعیین توالی شدند. طبقه‌بندی عملکردی لکه‌های پروتئینی هر لاین بعد از MS/MS نشان داد که پروتئین‌های متفاوت بیان شده دارای فعالیت‌های متابولیکی مختلفی هستند. در لاین متحمل R10 تعداد پنج لکه افزایش بیان نشان داد که شامل پروتئین‌های Pyruvate orthophosphate dikinase، ATP synthase subunit beta، Germin-like protein،Chlorophyll a-b binding protein ، Triosephosphate isomerase و 40S ribosomal protein می‌باشند. همچنین در لاین حساس S46 یک لکه‌ افزایش بیان نشان داد که شامل پروتئین‌ Proteasome subunit beta می‌باشد و دو لکه-کاهش بیان نشان دادند که شامل پروتئین‌های Chlorophyll a-b binding protein و Ribulose bisphosphate carboxylase small chain می‌باشند. پروتئین‌های شناسایی شده در این مطالعه و مسیرهای بیوشیمیایی احتمالی مرتبط، اطلاعات جدیدی را در پاسخ لاین-های ذرت (R10 و S46) به تنش شوری ارائه می‌دهند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study and comparison of leaf proteome in maize (Zea mays L.) under salt stress

نویسندگان [English]

  • Marjan Jannatdoust 1
  • Reza Darvishzadeh 2
  • Sattar Tahmasebi Enferadi 3
  • Maryam Monazzah 4

1 Phd Student in Plant Genetic and Breeding, Faculty of Agriculture, Urmia University.

2 Urmia university

3 Associate Professor, Department of Plant Molecular Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran.

4 PhD in Plant Pathology, Department of Plant Molecular Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran.

چکیده [English]

Salinity is a major abiotic stress that limits the growth and productivity of plants in many parts of the world due to increased use of poor-quality water for irrigation and soil salinity. Plant adaptation or tolerance to salinity stress involves alteration in physiological processes and metabolic pathways and activating molecular or gene networks. In this study, 2DE technique was used to identify proteins responsive to salinity stress in maize. Two maize lines with different responses to salinity stress; R10 (tolerant) and S46 (sensitive) were selected. In the eight-leaf stage, salinity stress treatment of 8 dS/m was applied to plants for 20 days and then leaf proteins were extracted. Spots with more than a 1.5-fold increase or decrease in their expression were isolated and sequenced by mass spectrometry. Functional classification of protein spots per line after MS/MS revealed that the differentlly expressed proteins have different metabolic activities. In the tolerant line (R10), 5 spots including Pyruvate orthophosphate dikinase proteins, ATP synthase subunit beta, Germin-like protein, Chlorophyll a-b binding protein, Triosephosphate isomerase, and 40S ribosomal protein, respectively showed an increased expression level. Moreover, in the sensitive line (S46), one spot showed an increased expression level that related to Proteasome subunit beta proteins, and two spots including Chlorophyll a-b binding protein and Ribulose bisphosphate carboxylase small chain protein showed a decreased expression level. The proteins identified in this study and the possible related biochemical pathways provide new information on the response of maize lines (R10 and S46) to salinity stress.

کلیدواژه‌ها [English]

  • Maize
  • salt stress-responsive proteins
  • salt tolerance
  • two-dimensional electrophoresis
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