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سید موسی موسوی مهرانگیز چهرازی اسمعیل خالقی

چکیده

تنش خشکی ﯾﮑﯽ از مهم‌ترین تنش‎های محیطی در بخش کشاورزی و مدیریت فضای سبز شهری به شمار می‎آید. تحقیقات گذشته در زمینه تنش آبی بیانگر اثرات منفی آن بر خصوصیات مرفولوژیکی، فیزیولوژیکی و بیوشیمیایی گیاهان می‌باشد. بر این اساس، پژوهشی به‌منظور بررسی اثر سطوح مختلف کم‌آبی )100 به‌عنوان شاهد، 75 و 50 درصد پتانسیل تبخیر و تعرق (ETcrop)( بر روند تغییرات پرولین، قندهای محلول کل، محتوای آب نسبی و میزان پروتئین‌های محلول برگ در دو گونه گل جعفری (فرانسوی و آفریقایی) به‌صورت آزمایش فاکتوریل در قالب طرح بلوک‌های کامل تصادفی با سه تکرار به اجرا درآمد. نتایج نشان داد با افزایش سطوح کم‌آبی بر میزان پرولین و قندهای محلول کل برگ افزوده و روند تغییرات این صفات باگذشت زمان افزایش یافت، به‌طوری‌که در 43 روز پس از اعمال تیمار خشکی میزان پرولین برگ در تیمار آبیاری 50 درصد ETc ، در مقایسه با تیمارهای شاهد و تیمار آبیاری 75 درصد ETc به ترتیب 64/2 و 35/1 برابر افزایش یافت و بیشترین میزان پرولین برگ و قندهای محلول کل برگ مربوط به تیمار 50 درصدETc بود. همچنین نتایج نشان داد میزان پروتئین‌های محلول برگ و میزان محتوای نسبی آب برگ نیز با کم شدن سطح آبیاری کاهش یافت، به‌گونه‌ای که کمترین میزان محتوای نسبی آب برگ و میزان پروتئین‌های محلول برگ در تیمار 50 درصدETc مشاهده شد. به طور کلی به دلیل عدم معنادار بودن شاخص‎های اندازه گیری شده بین تیمار شاهد و 75 درصد ETc، می توان انتظار داشت که با کاهش 25 درصدی نیاز آبی گل جعفری در جهت مدیریت بهینه آب در فضای سبز گام برداشت.

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ارجاع به مقاله
موسویس. م., چهرازیم., & خالقیا. (2017). اثر تنش آبی بر روند تغییرات پرولین، قندهای محلول، محتوای نسبی آب و پروتئین های محلول برگ دو گونه گل جعفری. علوم باغبانی, 31(2), 365-375. https://doi.org/10.22067/jhorts4.v0i0.53077
نوع مقاله
علمی - پژوهشی