ارزیابی تغییرات جذب عناصر معدنی در گیاه دارویی بالنگوی شهری (Lallemantia iberica) تحت تاثیر مقادیر مختلف مس و روی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس‌ارشد گروه علوم و مهندسی خاک دانشگاه تهران و دانشجوی دکتری گروه مهندسی علوم خاک دانشگاه تبریز

2 استاد فقید، و دانشیار گروه علوم و مهندسی خاک پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

3 پژوهشکده گیاهان دارویی دانشگاه شهید بهشتی

چکیده

روی و مس از عناصر غذایی ضروری کم‌مصرف گیاه و در غلظت‌های زیاد، عاملی تنش‌زا برای گیاهان و محدودکنندة رشد و جذب سایر عناصر غذایی‌ به‌شمار می‌روند. هدف این پژوهش، بررسی جذب عناصر کم‌مصرف (مس، روی، آهن و منگنز) و پرمصرف (فسفر و پتاسیم) در گیاه دارویی بالنگوی شهری در خاک دچار کمبود، کفایت و بیش‌بود عناصر مس و روی است. تیمارها شامل سه سطح مس (صفر، 5 و 25 میلی‌گرم مس در کیلوگرم از منبع سولفات مس) و سه سطح روی (صفر، 10 و 50 میلی‌گرم روی در کیلوگرم خاک از منبع سولفات روی) به همراه ترکیبی از تمام سطوح فوق (در مجموع 9 تیمار) بود. نتایج نشان داد که تمام تیمارهای اعمال‌شده موجب اثر مثبت بر جذب مس و روی ریشه شد؛ اما در اندام هوایی، مس و روی در غلظت‌های پایین (به ترتیب 5 و 10 میلی‌گرم بر کیلوگرم خاک) و بالا (به ترتیب 25 و 50 میلی‌گرم بر کیلوگرم خاک) به ترتیب اثر مثبت و منفی بر جذب همدیگر داشتند. اثر منفی سطوح بالای روی بر جذب مس اندام هوایی بیش از سطوح بالای مس بر جذب روی اندام‌ هوایی بود. میزان جذب پتاسیم ریشه و اندام‌ هوایی نیز به غیر از سطوح بالای مس و تیمارهای ترکیبی روی با سطوح بالای مس افزایش داشت. این نتایج هشداری سودمند در استفادة کنترل‌شده از مس و روی در کشت‌وکار گیاه دارویی بالنگوی شهری است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of Trends in Mineral Nutrition Uptake in Balangu (Lallemantia iberica) under Different Copper and Zinc Application Rates

نویسندگان [English]

  • Hemayat Asgari Lajaier 1
  • Gholamreza Savaghebi Firoozabadi 2
  • Babak Motesharezadeh 2
  • Javad Hadian 3
1 Graduate Student, University of Tehran, and PhD. Candidate, Department of Soil Science, College of Agriculture, University of Tabriz, Tabriz, Iran
2 Professor at Department of Soil Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
3 Assistant Professor Department of Agriculture, Medicinal Plants and Drug Research Institute, Shahid Beheshti University, Evin, Tehran, Iran
چکیده [English]

Zink and copper are among the essential micronutrients needed by plants. They, on the other hand (when at extra high concentrations) can act as stress factors, limiting a plant's uptake of other nutrients, and conseqently stunting the plant's grwth. The aim followed in the present study was to investigate the effect of different concentrations of Cu and Zn on micronutrients (Cu, Zn, Fe and Mn) and on macronutrients' (P and K) uptake in Dragon’s Head plant with the soil in a state of Zn and Cu deficiency,suficcientcy or toxicity level. The treatments consisted of three levels of Cu (0, 5 and 25 mg/Kg obtained from CuSO4 source) and three levels of Zn (0, 10 and 50 mg/Kg obtained from a ZnSO4 source) plus across combination of the two. The study was carried out to the effect of different concentrations of Cu (zero, 5 and 25 mg per kg of soil) and Zn (zero, 10 and 50 mg per kg of soil) on the uptake of Cu, Zn, Iron (Fe), Manganese (Mn), Potassium (K) and Phosphorus (P) within the roots and shoots of Balangu (Lallemantia iberica F. & CM). The results indicated that all the treatments positivly affected the uptake of ether Cu or Zn in roots, but in shoots, and when Cu and Zn at their low concentrations (5 and 10 mg per kg of soil, respectively) vs high concentrations (25 and 50 mg kg soil), had respectively positive vs negative effects on the uptake of these element.  The negative effect of high levels of Zn on Cu absorption was more pronounced than the similar levels of Cu on zinc absorption within plant's shoots. Porassium uptake by root and shoots increased in all the treatments except in those of high levels of Cu and Zn combined with the treatment of high levels of copper. These nutritional findings could be used as  useful alerts in controlled use of Cu and Zn in Balangu cultivation.

کلیدواژه‌ها [English]

  • Balangu
  • uptake
  • medicinal plants
  • Stress

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