نشریه محیط زیست طبیعی

بررسی تأثیر سطوح مختلف جیبرلیک اسید و سالیسیلیک اسید بر بهبود جوانه‏زنی گیاه Festuca arundinacea تحت تنش با ترکیبات آللوپاتیک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیئت علمی دانشگاه زابل

2 دانشیار دانشکدۀ منابع طبیعی، دانشگاه تهران

3 دانشجوی کارشناسی ارشد محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

این آزمایش برای بررسی اثر ترکیبات آللوپاتیک اکالیپتوس ((Eucalyptus camaldulensis بر جوانه‏زنی بذر و رشد گیاهچه‏های Festuca arundinaceaدر شرایط آزمایشگاهی انجام گرفت تا میزان تأثیر ترکیبات آللوپاتیک و همچنین تأثیر پیش‌تیمار با جیبرلیک اسید و سالیسیلیک اسید بر کنترل خسارت ترکیبات آللوپاتیک تعیین شود. محرک‏های شیمیایی استفاده‌شده عبارت بودند از: سه سطح جیبرلیک اسید و سه سطح سالیسیلیک اسید و 5 غلظت از ترکیبات آللوپاتیک عصارۀ اکالیپتوس که به‌صورت آزمایش فاکتوریل در قالب طرح پایه کاملاً تصادفی در چهار تکرار اجرا شد. نتایج حاصل از تجزیۀ واریانس و مقایسۀ میانگین‏ها نشان داد که عصارۀ اکالیپتوس اثر آللوپاتیک بازدارنده بر جوانه‏زنی بذر و رشد اولیۀ گیاهچه‏های  Festuca arundinaceaدارد. استفاده از محرک‏های شیمیایی به‌صورت پیش‌تیمار سبب افزایش رشد گیاهچه‏های Festuca arundinaceaشد. اثر متقابل سطوح آللوپاتی و پیش‌تیمار با محرک‏های شیمیایی بر تمامی صفات اندازه‌گیری شده معنا‏دار بود.‌

کلیدواژه‌ها

عنوان مقاله [English]

Investigation the effects of different levels of gibberellic and salicylic acid on improvement of germination indices of Festuca arundinacea under stress with allelopathic compound

نویسندگان [English]

  • Morteza Saberi 1
  • Ali Tavili 2
  • Morteza Miri 3

1 Scientific Member, University of Zabol

2 Assoc. Prof., Natural Resources Faculty, University of Tehran

3 MSc Student in Environment, Agricultural and Natural Resources University of Gorgan

چکیده [English]

The aim of this study was to investigate the allelopathic effects of Eucalyptus camaldulensis on germination and early seedling growth of Festuca arundinacea under laboratory condition in order to determine the effect of pretreatments on decreasing the destructive effects of allelopathic compounds. The chemical stimulators used in this study included 3 levels of gibberellic acid, 3 levels of salicylic acid and 5 levels of allelopathic compounds of Eucalyptus camaldulensis. Factorial test in the completely randomized design with four treatments was used to analyse the data. Results indicated that Eucalyptus camaldulensis extract had inhibitive effect on germination and early seedling growth of Festuca arundinacea. Early seedling growth of Festuca arundinacea increased by pretreatment of seeds in chemical stimulators. Interaction effects of allelopathic and pretreatment with chemical stimulators were significance on germination percentage and speed, root, shoot and plant length and seed vigor index.

کلیدواژه‌ها [English]

  • Allelopathy
  • germination
  • Chemical stimulators
  • Eucalyptus camaldulensis
  • Festuca arundinacea
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نشریه محیط زیست طبیعی
دوره 67، شماره 4 - شماره پیاپی 4
دی 1393
صفحه 415-424