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تاثیر نیتریک اکسید بر جوانهزنی و فعالیت برخی آنزیم‌های آنتی‌اکسیدانی کنجد (Sesamun indicum) تحت تنش شوری | ||
| علوم و تحقیقات بذر ایران | ||
| مقاله 6، دوره 5، شماره 3، مهر 1397، صفحه 77-88 اصل مقاله (1.16 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22124/jms.2018.2936 | ||
| نویسندگان | ||
| علیرضا فتحی* 1؛ مهدی برادران فیروزآبادی2؛ محمدرضا عامریان2 | ||
| 1دانشجوی دکتری | ||
| 2عضو هیئت علمی دانشگاه صنعتی شاهرود | ||
| چکیده | ||
| این آزمایش با هدف بررسی تأثیر نیتریک اکسید از منبع سدیم نیتروپروساید بر ویژگیهای جوانهزنی و فعالیت برخی آنزیم‌های آنتی اکسیدانی کنجد تحت تنش شوری به‌صورت فاکتوریل بر پایه طرح کاملاً تصادفی در سه تکرار در آزمایشگاه مرکز تحقیقات بذر کاشمر اجرا شد. تیمارها شامل پیش تیمار بذر با سدیم نیتروپروساید در شش سطح (بدون پیشتیمار، آب مقطر، 50، 100، 150 و 200 میکرومولار) و تنش شوری در سه سطح (صفر، 50 و 100 میلی‌مولار در لیتر) بود. نتایج نشان داد که تنش شوری موجب کاهش شاخصهای جوانهزنی و افزایش فعالیت آنزیم های آنتی اکسیدانی کنجد شد. پیش تیمار بذر با سدیم نیتروپروساید موجب افزایش سرعت جوانهزنی، طول و وزن ریشه چه و ساقه چه در شرایط تنش شد و عملکرد بذر را بهبود بخشید. همچنین فعالیت آنزیم های سوپراکسیددیسموتاز، گلوتاتیون ردوکتاز و آسکوربات پراکسیداز نیز تحت تیمارهای نیتریک اکسید افزایش یافت در حالی که فعالیت آنزیم کاتالاز و محتوای مالون دی آلدئید به عنوان شاخص تخریب غشاء کاهش یافت. به طور کلی غلظت مناسب و کارا برای کاهش اثرات شوری در گیاهچه کنجد در این آزمایش غلظت 150 میکرومولار سدیم نیتروپروسایدبود، همچنین به نظر می رسد غلظت‌های بالاتر از 150 میکرومولار سدیم نیتروپروساید، اثرات سمیت نیتریک اکسید را بر سلول القا کند. | ||
| کلیدواژه‌ها | ||
| آنزیم های آنتی اکسیدانی؛ سدیم نیتروپروساید؛ سرعت جوانه زنی | ||
| مراجع | ||
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