بررسی اثر شدت و مدت زمان‌ میدان‌ مغناطیسی روی جوانه‌زنی پریوش Catharanthus roseus cv. ‘Acillata’

Subject Areas : Journal of Ornamental Plants

فاطمه  زارع دوست ¹ (باشگاه پژوهشگران و نخبگان جوان، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران)
داود  هاشم آبادی ² (گروه علوم باغبانی، واحد رشت، دانشگاهآزاد اسلامی، رشت، ایران)
مریم  جدید سلیماندارابی ³ (باشگاه پژوهشگران و نخبگان، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران.)

Received: 2016-09-02 Accepted : 2016-12-19 Published : 2017-06-01

Keywords: تنش شوری, پرایمینگ بذر, گیاه زینتی, تیمار فیزیکی,

Abstract :

میدان مغناطیسی موجب بهبود پارامترهای جوانه­ زنی می­شود. جوانه ­زنی بذرهای پریوش در شرایط شور کاهش می­ یابد. این آزمایش جهت بررسی اثر شدت و مدت زمان میدان مغناطیسی بر جوانه‌زنی بذرهای پریوش در شرایط شور (19 میلی زیمنس بر سانتی­متر) انجام شد. این مطالعه در قالب آزمایش فاکتوریل بر پایه‌ی طرح کاملا تصادفی با 3 شدت میدان مغناطیسی ((M1)50، (M2)100 و (M3) 150 میلی­ تسلا) و مدت زمان قرار دادن بذرها در معرض میدان مغناطیسی ((T1)10،(T2) 20 و(T3)30 دقیقه) اجرا شد. نتایج نشان داد که اعمال میدان مغناطیسی، جوانه‌زنی بذرها را در شرایط شور بهبود می‌بخشد؛ به طوری‌که بیشترین درصد جوانه‌زنی با 74.44 و 73.05 درصد به ترتیب متعلق به تیمارهای 100 میلی‌تسلا به مدت 20 دقیقه و 100 میلی‌تسلا به مدت 30 دقیقه بود که نسبت به شاهد 28 درصد موجب بهبود جوانه‌زنی شدند. همچنین این تیمارها برترین تیمارها در صفات سرعت جوانه‌زنی و شاخص بنیه I و II بودند. بیشترین طول ریشه‌چه (2.37 سانتی‌متر) و طول ساقه‌چه (3.50 سانتی‌متر) به ترتیب متعلق به تیمارهای 50 میلی‌تسلا به مدت 20 دقیقه و 100 میلی‌تسلا به مدت 10 دقیقه بود. بیشترین وزن خشک ریشه‌چه (0.24 گرم) و وزن خشک ساقه‌چه (0.81 گرم) در تیمار 100 میلی‌تسلا به مدت 10 دقیقه مشاهده شد.

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