تأثیر تنش قلیائیت بر روی برخی از ویژگی‌های مورفوفیزیولوژیکی دو رقم گلرنگ (Carthamus tinctorius L.)

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه ولی عصر (عج) رفسنجان

چکیده

به‌‌منظور بررسی اثر تنش قلیائیت بر رشد رویشی و برخی ویژگی‌های فیزیولوژیک گیاه گلرنگ آزمایشی در گلخانه تحقیقاتی دانشگاه ولی‌عصر (عج) رفسنجان به‌صورت فاکتوریل در قالب طرح کاملاٌ تصادفی با سه تکرار اجرا شد. فاکتورهای آزمایش شامل تنش قلیائیت در هفت سطح (0، 10، 20، 30، 40، 50 و 60‌میلی‌مولار) و دو رقم گلرنگ (صفه و 411) بودند. نتایج نشان‌داد که تنش قلیائیت موجب کاهش طول ساقه و ریشه، وزن خشک اندام هوایی و وزن خشک ریشه گردید در حالی‌که میزان پرولین، قندهای محلول و مالون‌دی‌آلدئید را افزایش داد. هم‌چنین با افزایش تنش قلیائیت پتانسیل عملکرد کوانتوم (Fv/Fm)، کارایی شاخص فتوسنتز (PI)، میزان کلروفیل a، کلروفیل b، کلروفیل کل و پتاسیم کاهش پیدا کرد در حالی‌که میزان کاروتنوئید، سدیم و نسبت سدیم به پتاسیم افزایش یافت. رقم 411 از نظر خصوصیات رویشی، میزان کلروفیل a و کل بر رقم صفه برتری نشان‌داد. هم‌چنین هر دو رقم عکس العمل یکسانی به تنش قلیائیت نشان‌دادند.

کلیدواژه‌ها


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