تأثیر سطوح مختلف تنش خشکی بر مؤلفه های جوانه زنی دو جمعیت اصفهانی و هندی گیاه شنبلیله

نویسندگان

دانشگاه لرستان

چکیده
این تحقیق به­ منظور بررسی اثرسطوح مختلف تنش خشکی( صفر، 3-، 5-،7- بار) بر برخی فاکتورهای جوانه ­زنی دو جمعیت هندی و اصفهانی گیاه شنبلیله در آزمایشی به­ صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار انجام گرفت. تنش خشکی در چهار سطح پتانسیل ­آب با استفاده از پلی­اتیلن گلایکول 6000 اعمال شد. میزان درصد و سرعت جوانه ­زنی، شاخص بنیه بذر، طول ریشه­ چه، ساقه­ چه، وزن تر و خشک گیاه چه پس از 7 روز اندازه­ گیری شد. نتایج بدست آمده نشان داد با اینکه درصد و سرعت جوانه­زنی، رشد گیاهچه و شاخص بنیه بذر در جمعیت اصفهانی گیاه شنبلیله نسبت به جمعیت هندی بیشتر بود، اما تنش خشکی در هر دو جمعیت باعث کاهش معنی­ داری در رشد و جوانه­ زنی گیاه شد. با افزایش تنش خشکی و کاهش پتانسیل آب از 3- بار به 7- بار میزان درصد و سرعت جوانه زنی، شاخص بنیه بذر، طول ریشه­ چه و ساقه­ چه و وزن تر و خشک گیاه چه به طور معنی داری کاهش یافت.

کلیدواژه‌ها


عنوان مقاله English

Effect of drought stress on germination characteristics of two populations of Fenugreek (Trigonella foenum subsp. graceum L.)

نویسندگان English

zohre zamani
Hamze Amiri
Ahmad Ismaeili
lorestan university
چکیده English

A laboratory research carried out to evaluate the effect of drought stress on germination characteristics in two 'Indian' and 'Isfahanian' populations of Fenugreek. This experiment performed in a factorial experiment based on a completely randomized design with three replicates. Four levels of drought stress applied by using polyethylene glycol 6000. Percentage of germination, germination rate, vigor index, root and shoot length as well as fresh and dry weight were measured after 7 days. The results showed that drought stress caused a significant reduction in both population growth and germination, although the percentage of germination, seedling growth and vigor index in the Isfahanian population was higher than the Indian. With the increase of water stress and the reduction of water potential from -3 Bar to -7 Bar, the percentage of germination, vigor index, root and shoot length as well as fresh and dry weight significantly decreased.

کلیدواژه‌ها English

dry weight
fresh weight
polyethylene glycol
vigor index
water potential
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دوره 5، شماره 2 - شماره پیاپی 16
تابستان 1397
صفحه 191-183

  • تاریخ دریافت 18 خرداد 1405
  • تاریخ انتشار 18 خرداد 1405