تاثیر پوترسین خارجی در به تاخیر انداختن پیری گل بریده لیزیانتوس
Subject Areas : Journal of Ornamental Plantsداوود عطایی 1 , روح انگیز نادری 2 , عزیزالله خاندان میرکوهی 3
1 - گروه علوم باغبانی دانشکده کشاورزی و منابع طبیعی دانشگاه تهران، کرج
2 - گروه علوم باغبانی دانشکده کشاورزی ومنایع طبیعی دانشگاه تهران، کرج
3 - گروه علوم باغبانی دانشکده کشاورزی و منابع طبیعی دانشگاه تهران
Keywords:
Abstract :
پل یآمی نهای پوترسین، اسپرمیدین و اسپرمین مواد ضد پیری هستندکه در فرآیندهای رشد گیاه و در پاسخ به تن شها نقش دارند. مکانیسمفیزیولوژیکی که کاربرد پوترسین پیری گل شاخه بریده لیزیانتوس را در طولعمر گلجایی تحت تاثیر قرار می دهد مورد بررسی قرار گرفته است. گل های1 و 2 میلی مولار پوترسین ،0/ شاخه بریده لیزیانتوس با آب مقطر )شاهد(، 5تی ار شدند و در دمای 25 دجه سانت یگراد تا 12 روز نگهداری شدند. کاربردپوترسین با غلظت 2 میلی مولار عمر گلجایی را توسعه داد که با کاهش نشتمرتبط بود. تی ار پوترسین فعالیت )MDA( یونی و محتوای مالون دی آلدئیدرا که مسئول پراکسیداسیون چربی های غشاء است )LOX( آنزیم لیپوکسی ژنازو )CAT( را کاهش داد. تی ار پوترسین همچنین فعالیت آنزیم های کاتالازرا )H2O را افزایش و تجمع پراکسید هیدروژن ) 2 )APX( آسکوربات پراکسیدازدر طول عمر گلجایی کاهش داد. بنابراین کاربرد پوترسین م یتواند نفوذپذیریغشاء را به وسیله افزایش فعالیت سیستم آنتی اکسیدانی حفظ کند و در نتیجهپیری گل شاخه بریده لیزیانتوس را در طول عمر گلجایی به تاخیر بیندازد.
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