بررسی تاثیر تنش خشکی بر برخی ویژگی‌های مورفولوژیکی و فیزیولوژیکی سه رقم انگور (.Vitis vinifera L)

علوم باغبانی

مقاله 6، دوره 31، شماره 2، شهریور 1396، صفحه 315-326   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jhorts4.v0i0.53495

نویسندگان

مهدی آران؛ بهرام عابدی^* ؛ علی تهرانی فر؛ مهدی پارسا

دانشگاه فردوسی مشهد

چکیده

به‌منظور بررسی تاثیر تنش خشکی بر برخی از ویژگی‌های سه رقم انگور (یاقوتی، بیدانه سفید و عسکری)، آزمایشی گلدانی به‌صورت فاکتوریل در قالب طرح بلوک‌های کامل تصادفی با چهار تکرار در سال‌های94-1393 انجام شد. تیمارهای آبیاری در چهار سطح، شامل تیمار شاهد (100 درصد ظرفیت زراعی)، تنش متوسط (60 درصد ظرفیت زراعی)، تنش شدید (30 درصد ظرفیت زراعی) و تیمار آبیاری مجدد پس از تیمار تنش شدید انجام شدند. نتایج نشان داد که با افزایش شدت تنش خشکی، شاخص‌های رشدی، شاخص کلروفیل و محتوای نسبی آب برگ‌ها کاهش می‌یابد و در شرایط تنش خشکی شدید رقم یاقوتی دارای بیشترین میزان افزایش ارتفاع (12/9 سانتیمتر)، تعداد برگ (12/35)، وزن خشک برگ و ساقه (به ترتیب 92/4 و 41/8 گرم) و محتوای نسبی آب برگ (49/85 درصد) بود. میزان نشت الکترولیت‌ها، میزان قندهای محلول کل، میزان فعالیت آنتی‌اکسیدانی، ترکیبات فنلی و پرولین با افزایش شدت تنش خشکی افزایش یافت. در شرایط تنش خشکی رقم بیدانه سفید دارای بیشترین میزان نشت الکترولیت‌ها بود و رقم یاقوتی بیشترین میزان فعالیت آنتی‌اکسیدانی (3/45 درصد) و پرولین (12/11 میکرو مول بر گرم وزن خشک) را در شرایط تنش خشکی شدید نسبت به دو رقم دیگر داشت. با توجه به نتایج بدست آمده در این پژوهش به نظر می‌رسد که رقم یاقوتی نسبت به دو رقم دیگر به خشکی متحمل‌تر است.

کلیدواژه‌ها

پرولین؛ شاخص‌های رشدی؛ میزان قندهای محلول؛ محتوای نسبی آب برگ

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