تأثیر غلظت‌های مختلف سلنیوم بر عملکرد و ویژگی‌های فیزیولوژیکی کلم تکمه‌ای (Brassica oleracea var. Gemmifera)

نوع مقاله : مقالات پژوهشی

نویسندگان

1 دانشگاه تبریز

2 شاهد تهران

چکیده

سلنیوم عنصری غیرفلزی است که با تأثیر بر رشد و نمو گیاهان و به خاطر حضور در سیستم های آنتی اکسیدانی یک عنصر اساسی برای سلامتی انسان و حیوان شناخته شده است. به منظور ارزیابی تأثیر غلظت های مختلف سلنیوم بر عملکرد و خصوصیات فیزیولوژیکی کلم تکمه ای (Brassica oleracea var. Gemmifera) آزمایشی با شش سطح سلنیوم (0، 2، 4، 8، 16و 32 میلی گرم در لیتر از منبع سلنات سدیم) در قالب یک طرح کاملاً تصادفی با چهار تکرار در شرایط گلخانه ای انجام شد. نتایج نشان داد که عملکرد گیاه به طور معنی داری (01/0 P≤) تحت تأثیر تیمارهای سلنیومی قرار گرفت، به طوری که با افزایش غلظت سلنیوم در محلول غذایی از 0 تا 8 میلی گرم در لیتر عملکرد و شاخص کلروفیل افزایش، نشت الکترولیت در برگ ها کاهش و سپس با افزایش غلظت سلنیوم عملکرد کاهش و نشت الکترولیت در برگ های جوان افزایش یافت. حداکثر عملکرد با افزایش 40 درصدی نسبت به شاهد در غلظت 8 میلی گرم در لیتر مشاهده شد. با افزایش سطوح سلنیوم در محلول غذائی، غلظت سلنیوم افزایش یافت و به ترتیب برگ های پیر>برگ های جوان> جوانه ها بود. نتایج نشان داد که می توان سلنیوم را حداکثر تا غلظت 8 میلی گرم در لیتر به منظور بهبود رشد گیاه به محلول های غذایی برای پرورش کلم تکمه ای اضافه نمود.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Different Concentrations of Se on Yield and Physiological Characteristics of Brussels Sprouts (Brassica oleracea var. Gemmifera)

نویسندگان [English]

  • rozita khademi astaneh 1
  • Seyed Jalal Tabatabaie 2
  • saheb ali bolandnazar 1
1 University of Tabriz
2 Shahed. Tehran
چکیده [English]

Selenium is a non metallic chemical element that affects plant growth and development and but it can due to the presence of antioxidant defense system as a matter of basic human and animal health has been identified. An experiment was conducted to study the effect of Se on physiological characteristics and yield of Brussels sprouts (Brassica oleracea var. Gemmifera) with six levels of Se (0, 2, 4, 8, 16 and 32 mg/l) from sodium selenate. The experiment was arranged in a completely randomized design with four replications under greenhouse conditions. The results showed that yield in terms of fresh weight of sprout was significantly (P≤0.01) affected by Se concentration so that increasing Se concentration from 0 to 8 mg/l increased the yield and chlorophyll index, electrolyte leakage (EL) in leaves decreased then with increasing Se concentration decreased the yield and EL in young leaves increased. The highest yield was observed at 8 mg/l Se concentration that was 40% higher compared to the control treatment. With increase concentration of Se in the nutrient solution increased Se concentration and as follow old leaves>young leaves> sprouts. The results showed that Se can be added at the 8 mg/l to the nutrient solution for growing Brussels sprout.

کلیدواژه‌ها [English]

  • Nitrate
  • Electrolyte leakage
  • Chlorophyll
  • Hydroponics
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