تأثیر دمای شبانه و نیتریک‌اکساید بر برخی ویژگی های فیزیو-بیوشیمیایی گیاه نخود

نوع مقاله : مقالات پژوهشی

نویسندگان

دانشگاه شهید مدنی آذربایجان

چکیده

تنش های محیطی از جمله دماهای پایین باعث کاهش تولید و کیفیت محصولات زراعی می شوند. نیتریک‌اکساید به‌عنوان یکی از تنظیم‌کننده های رشد گیاهی نقش مهمی در کاهش اثرات سوء ناشی از تنش ها برعهده دارد. در این پژوهش تغییرات صفات فیزیو-بیوشیمیایی گیاه نخود تحت تیمار نیتریک‌اکساید و دمای شبانه مورد‌بررسی قرار گرفت. وزن‌تَر بخش های هوایی و ریشه‌ها و ترکیباتی مانند پرولین، قندهای محلول و نامحلول، آسکوربات و فعالیت آنزیم های آسکوربات‌پراکسیداز و پلی فنل اکسیداز سنجش شدند. نتایج نشان‌داد که اثر نیتریک‌اکساید بر وزن‌تَر بخش های هوایی و محتوای پرولین، قندهای محلول و فعالیت آنزیم پلی فنل اکسیداز معنی-دار بود. تغییر دما بر وزن‌تَر ریشه، محتوای پرولین، قندهای محلول و نامحلول، آسکوربات، فعالیت آنزیم‌های آسکوربات پراکسیداز و پلی فنل اکسیداز تأثیر معنی دار داشت. برهم کنش نیتریک‌اکساید و دما بر وزن‌تَر ریشه و بخش های هوایی، محتوای پرولین، قندهای محلول و فعالیت آنزیم آسکوربات‌پراکسیداز تأثیر معنی داری را نشان داد. چنین ارزیابی می‌شود که متابولیسم نخود به دمای شبانه وابسته‌ بوده و تیمار نیتریک‌اکساید الگوی تغییرات متابولیکی را تحت تأثیر قرار می‌دهد.

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