اثر تنش خشکی بر تجمع پرولین، قندهای محلول و تغییرات عناصر سدیم و پتاسیم در ژنوتیپ¬های لوبیا سفید
الموضوعات :
1 - دانشگاه آزاد اسلامی، واحد شیراز، گروه علوم باغبانی، شیراز، ایران
الکلمات المفتاحية: پرولین, تنش خشکی, قندهای محلول, لوبیا سفید, سدیم, پتاسیم,
ملخص المقالة :
به منظور بررسی برخی از تغییرات فیزیولوژیک، آزمایشی به صورت کرت¬های خرد شده در قالب طرح پایه بلوک¬های کامل تصادفی در 3 تکرار در مزرعه تحقیقاتی دانشگاه آزاد اسلامی واحد شیراز به اجرا در آمد. فاکتور اول دو سطح آبیاری (آبیاری نرمال و تنش خشکی) و فاکتور دوم شامل سه ژنوتیپ¬ لوبیا سفید (دانشکده، شکوفا و G11867) بود، که بر اساس شاخص های مورفولوژیک به ترتیب به عنوان حساس، نیمه متحمل و متحمل دسته بندی شده بودند. در مرحله 50 درصد گل¬دهی نمونه برداری انجام شد و میزان قندهای محلول، محتوای پرولین و عناصر سدیم و پتاسیم اندازه¬گیری گردید. نتایج آزمایش نشان داد که غلظت قندهای محلول، محتوای پرولین و یون پتاسیم در اثر تنش خشکی افزایش و یون سدیم کاهش یافت. ژنوتیپ متحمل G11867 بیشترین میزان قندهای محلول و یون سدیم را دارا بود. ژنوتیپ حساس دانشکده از بیشترین میزان یون پتاسیم و پرولین برخوردار بود. نتایج آزمایش نشان داد که تجمع بیشتر پتاسیم و محتوای پرولین لوبیا در شرایط خشکی می تواند یک سازگاری برای تحمل به خشکی باشد که به بقاء و تولید در شرایط خشکی کمک می کند.
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