نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه شاهد، تهران، ایران.

2 دانشیار، دانشکده کشاورزی شاهد، تخصص: فیزیولوژی گیاهان زراعی/ گیاهان دارویی/ کود بیولوژیک/ رازیانه/ زیره/ بابونه

10.22059/jci.2021.299869.2370

چکیده

سلنیوم به دلیل خواص آنتی اکسیدانی نقش موثری در افزایش تحمل گیاه به اثرات تنش‌های محیطی دارد. به همین منظور آزمایشی به صورت فاکتوریل در قالب طرح آماری کاملا تصادفی در سه تکرار در دانشکده علوم کشاورزی دانشگاه شاهد تهران اجرا گردید. تیمارهای آزمایشی شامل غلظت‌های مختلف سلنیوم در شش سطح (صفر ، 5/0 ، 5/1، 3، 5/4 و 6 میلی‌گرم در لیتر) و زمان‌های مختلف پرایمینگ در چهار سطح (صفر، 8، 12 و 24 ساعت) بودند. نتایج نشان داد اثر ساده و برهمکنش تیمارهای آزمایشی بر صفات درصد جوانه‌زنی، سرعت جوانه‌زنی، متوسط جوانه‌زنی، متوسط جوانه‌زنی روزانه، سرعت جوانه-زنی روزانه، ضریب سرعت جوانه‌زنی، طول گیاهچه، وزن خشک گیاهچه، شاخص طولی بنیه گیاهچه و شاخص وزنی بنیه گیاهچه در سطح احتمال یک درصد معنی‌دار بود. به طور کلی با افزایش غلظت سلنیوم از صفر تا 3 میلی‌گرم در لیتر افزایش معنی‌داری در میانگین اکثر صفات اندازه‌گیری شده مشاهده شد و با افزایش غلظت سلنیوم بالاتر از 3 میلی‌گرم در لیتر روندی کاهشی در میانگین‌ها صفات را شاهد بودیم. بیشترین درصد جوانه زنی(33/96) درغلظت 3 میلی‌گرم در لیتر سلنیوم به مدت 8 ساعت افزایشی 5/23 درصدی را نسبت به تیمار شاهد نشان داد. همچنین بیشترین میانیگن مدت زمان جوانه زنی، در غلظت 6 میلی گرم سلنیوم و مدت زمان 24 ساعت پرایمینگ دارای افزایشی 03/41 درصدی نسبت به تیمار شاهد داشت. بنابراین جهت بهبود جوانه-زنی گیاه کینوا می‌توان با پرایمینگ بذر با استفاده از سلنیوم به نتیجه بهتری رسید.

کلیدواژه‌ها

عنوان مقاله [English]

The effect of priming with different concentrations of selenium on germination indices of quinoa seeds and seedlings

نویسندگان [English]

  • shocofeh gholami 1
  • majid amini dehaghi 2

1 Ph.D. Student, Department of Agriculture and Plant Breeding, Faculty of Agricultural Sciences, Shahed University, Tehran, Iran.

2 Member of the faculty of Shahed University of Tehran

چکیده [English]

Due to its antioxidant properties, selenium has an effective role in increasing plant tolerance to adverse environmental effects.To determine the optimum concentration and priming time of quinoa seed by selenium, a factorial experiment based on a completely randomized design with three replications was carried out in the Shahed University Tehran/Iran in 2019. Experimental treatments included was different concentrations of Selenium in six levels (0, 0.5, 1.5,3,4.5,6 mg/l) and the second factor was priming time in four levels (0, 8, 12 and 24hours). The results showed Simple and interaction effect of experimental treatments on traits on germination percentage, was significant (p<0.01) on germination percentage, germination rate, mean germination time, mean daily germination, daily germination rate, germination rate coefficient, seedling length, seedling dry weight, index Longitudinal vascular length and seedling vigor weight index. Across all with the concentration of selenium increased From 0 to 3 mg / L, a significant increase was observed in most of the mean traits and with increasing selenium concentration above 3 mg / L, there was a decreasing trend in the mean traits. The highest percentage of germination (96.33) at a concentration of 3 mg / l selenium for 8 hours showed an increase of 23.5% compared to the control treatment. Also, the highest mean germination time was 6 mg of selenium and 24 hours of priming had an increase of 41.3% compared to the control treatment. Therefore, in order to improve the germination of quinoa, better results can be obtained by priming the seeds using selenium.

کلیدواژه‌ها [English]

  • Germination percentage
  • mean delay germination
  • nutri priming
  • priming time
  • Seedling Vigor Index
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