سامانه مدیریت نشریات علمی دانشگاه شهید بهشتی

سلیمان نژاد, زهرا, عبدل زاده, احمد, صادقی پور, حمیدرضا. (1396). توان گیاه‌پالایی دو گونه خردل اتیوپی (Brassica carinata) و خردل هندی (Brassica juncea) در خاک آلوده به کادمیوم. , 15(3), 173-186.
زهرا سلیمان نژاد; احمد عبدل زاده; حمیدرضا صادقی پور. "توان گیاه‌پالایی دو گونه خردل اتیوپی (Brassica carinata) و خردل هندی (Brassica juncea) در خاک آلوده به کادمیوم". , 15, 3, 1396, 173-186.
سلیمان نژاد, زهرا, عبدل زاده, احمد, صادقی پور, حمیدرضا. (1396). 'توان گیاه‌پالایی دو گونه خردل اتیوپی (Brassica carinata) و خردل هندی (Brassica juncea) در خاک آلوده به کادمیوم', , 15(3), pp. 173-186.
سلیمان نژاد, زهرا, عبدل زاده, احمد, صادقی پور, حمیدرضا. توان گیاه‌پالایی دو گونه خردل اتیوپی (Brassica carinata) و خردل هندی (Brassica juncea) در خاک آلوده به کادمیوم. , 1396; 15(3): 173-186.

توان گیاه‌پالایی دو گونه خردل اتیوپی (Brassica carinata) و خردل هندی (Brassica juncea) در خاک آلوده به کادمیوم

فصلنامه علوم محیطی
مقاله 11، دوره 15، شماره 3، مهر 1396، صفحه 173-186    اصل مقاله (1.08 M)
نوع مقاله: مقاله پژوهشی
نویسندگان
زهرا سلیمان نژاد؛ احمد عبدل زاده* ؛ حمیدرضا صادقی پور
گروه زیست شناسی، دانشکده علوم، دانشگاه گلستان، گرگان، ایران
چکیده
سابقه و هدف:
فلزات سنگین از جمله مهم‌ترین آلاینده‌های محیط زیست به شمار می‌آیند که در چند دهه اخیر بسیار مورد توجه قرار گرفته‌اند. تجمع عناصر در خاک به‌ویژه در زمین‌های کشاورزی، امری تدریجی بوده و غلظت عناصر سنگین می‌تواند به سطحی برسد که امنیت غذایی انسان را تهدید کند. در میان عناصر سنگین، کادمیوم به‌ علت تحرک بالا در سیستم‌های بیولوژیک، سمیت بالا، حلالیت زیاد در آب و جذب سریع توسط سیستم ریشه‌ای بسیاری از گونه‌های گیاهی، یکی از خطرناک‌ترین عناصر سنگین است. در این تحقیق رشد، انباشتگی و توان گیاه‌پالایی کادمیوم در دو گونه خردل اتیوپی (Brassica carinata) و خردل هندی (Brassica juncea) بررسی شده است. 
مواد و روش‌ها:
گیاهان در خاک‌های‌ آلوده با غلظت‌های ۰، ۷۵ و ۱۵۰ میلی‌گرم بر کیلوگرم کادمیوم رشد کردند و پس از ۷ هفته کشت در گلخانه‌، برای سنجش برخی خصوصیات رشدی برداشت شدند. 
نتایج و بحث:
نتایج پژوهش نشان داد که تیمارهای کادمیوم بر صفات رشد و میزان کلروفیل دو گیاه اثر معنی‌داری نداشت. هر دو گیاه شاخص تحمل تنش بالایی را نسبت به فلز کادمیوم نشان دادند. با افزایش آلودگی فلز در خاک، غلظت کادمیوم در ریشه و بخش هوایی هر دو گیاه خردل اتیوپی و خردل هندی به‌طور معنی‌داری افزایش یافت. فاکتور انتقال گیاه خردل هندی حدوداً ۷۰٪ بیشتر از خردل اتیوپی بوده است و بیشترین میزان فاکتور انتقال در تیمار ۷۵ میلی‌گرم بر کیلوگرم کادمیوم در گیاه خردل هندی مشاهده شد.
 نتیجه‌گیری:
مقایسه دو گیاه خردل اتیوپی و خردل هندی نشان می‌دهد که هر دو گونه قادر به تحمل و تجمع کادمیوم بوده، ولی فاکتور انتقال و میزان جذب و تجمع کادمیوم در گیاه خردل هندی بیشتر از خردل اتیوپی بوده است، درنتیجه به نظر می‌رسد گیاه خردل هندی عملکرد بهتری برای استفاده در فرایند گیاه‌پالایی کادمیوم داشته باشد.
کلیدواژه‌ها
آلودگی خاک؛ تجمع؛ شب‌بو؛ کادمیوم؛ گیاه‌پالایی
عنوان مقاله [English]
Phytoremediation potential of two species Brassica juncea and Brassica carinata in soils contaminated by cadmium
نویسندگان [English]
Zahra Soleimannejad؛ Ahmad Abdolzadeh؛ Hamidreza Sadeghipour
Department of Biology, Faculty of Science, Golestan University, Gorgan, Iran
چکیده [English]
Introduction:
Heavy metals are one of the most important environmental pollutants that have been highly regarded in recent decades. The accumulation of elements in the soil, especially in agricultural land, has been gradual and the concentration of heavy elements can reach to the level that threaten human food security. Among heavy metals, cadmium is considered as one of the most dangerous elements due to its high mobility in biological systems, high toxicity, high solubility in water and rapid absorption by the root system of many plant species. Therefore, in this research, the growth, accumulation and phytoremediation potential of cadmium in two species Ethiopian mustard (Brassica carinata) and Hindi mustard (Brassica juncea) is studied.
Materials and methods:
Plants in contaminated soils with concentrations of 0, 75 and 150 mg kg-1 of cadmium were grown in greenhouse and harvested after 7 weeks  to measure some growth characteristics.Results and discussion: The results showed that cadmium treatments had no significant effect on growth traits and chlorophyll content of two plant in compared with control. Both plant showed high stress tolerance index and low stress tolerance to cadmium. With increasing cadmium concentration in soil, cadmium concentrations in root and shoot of both plants B. carinata and B. juncea significantly increased. The translocation factor of B. juncea was about 70% higher than B. carinata.The highest translocation factor was observed in the treatment of 75 mg kg-1 of cadmium in B. juncea.
Conclusion:
The comparison of two plants of B. carinata and B. juncea showed that both species are able to tolerate and accumulate cadmium, but translocation factor, uptake and accumulation of cadmium in plant B. juncea was more than B. carinata. So it seems B. juncea had better performance for use in phytoremediation process.
کلیدواژه‌ها [English]
Soil contamination, Accumulation, Brassicaceae, Cadmium, Phytoremediation
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