Effect of Strengths and Exposure Durations of Magnetic Field on Seeds Germination of Catharanthus roseus cv. ‘Acillata’
محورهای موضوعی : مجله گیاهان زینتی
Fatemeh Zaredost
1
(
Young Researchers and Elite Club, Rasht Branch, Islamic Azad University, Rasht, Iran
)
Davood Hashemabadi
2
(
Department of Horticulture, Rasht Branch, Islamic Azad University, Rasht, Iran
)
Maryam Jadid Soleimandarabi
3
(
Young Researchers and Elite Club, Rasht Branch, Islamic Azad University, Rasht, Iran
)
کلید واژه: salinity stress, seed priming, Ornamental plant, Physical treatment,
چکیده مقاله :
Magnetic field improved germination parameters. The germination of Catharanthus roseus seeds is lost under salinity conditions. The effect of different strengths of magnetic field and exposure durations on the germination of C. roseus seeds under salinity conditions (19 mS cm-1) were investigated. The experiment was conducted with factorial arrangement based on a completely randomized design (CRD) with 3 magnetic field strengths (50, 100 and 150 mT) and 3 exposure durations (10, 20, and 30 minutes). It was found that exposure to magnetic field improved seed germination under salinity conditions, so that the highest germination percentages of (74.44 and 73.05%) were obtained from 20 and 30 minutes exposure to the 100 mT magnetic field, respectively, which resulted in 28% higher germination than control. Also, these treatments were found to be the best for germination rate and vigor indices I and II. The highest radicle length (2.37 cm) and plumule length (3.50 cm) were related to the 20 minutes exposure in 50 mT magnetic field and the 10 minutes exposure in the 100 mT magnetic field. The highest radicle dry weight of 0.24 g and plumule dry weight of 0.81 g was observed in treatment of 10 minute exposure to the100 mT magnetic field.
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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