Document Type : Research Paper
Authors
Department of Agronomy, Fasa Branch, Islamic Azad University, Fasa, Iran.
Abstract
Objective: In order to investigate the feasibility of phytoremediation of cadmium nitrate-contaminated growth substrates with weeds, a factorial experiment was conducted in the form of a completely randomized design in the spring of 2021-22.
Methods: The experimental factors included weeds (Portulaca oleracea, Chenopodium album, and Amaranthus retroflexus) and the gowth substrate contamination with cadmium nitrate comprising levels of zero (control), 25, 50, and 75 miligrams per kilogram of soil.
Results: The results showed that with increasing consumption of cadmium nitrate, the amount of cadmium in the shoots, roots and biological factors exhibited an increasing trend. The amount of root cadmium was higher in P.oleracea, but the concnetration of shoot cadmium in Ch.album and A.retroflexus showed a significant increase compared to that of P.oleracea. Therefore, in purslane, the transfer of cadmium from the roots to the shoots was probably less than that of Ch.album and A.retroflexus. With the increase in cadmium nitrate concentration, ion leakage displayed an increasing trend, and leaf relative water content and chlorophyll content displayed declining trends. On the other hand, the catalase and ascorbate peroxidase enzymes in leaves showed an increasing trend with increasing cadmium nitrate consumption. Also, the highest activity of antioxidant enzymes was observed in A.retroflexus weeds.
Conclusion: Generally, with the mentioned characteristics, ther P.oleracea plant can be considered as a hyperaccumulator, and Ch.album and A.retroflexus can be considered as moderate accumulators of cadmium metal.
Keywords
منابع
اکبرپور سراسکانرود، فاطمه؛ صدری، فرهاد و گلعلیزاده، داریوش (1391). گیاه‌پالایی خاکهای آلوده به برخی فلزات سنگین به‌وسیله چند گیاه بومی منطقه حفاظت‌شده ارسباران. نشریه حفاظت منابع آب و خاک. 1 (5)، 67-53.
جعفرزاده رزمی، مریم؛ اقدسی، مهناز؛ عبدل زاده، احمد و صادقی پور، حمیدرضا (۱۳۹۹). ارزیابی توان گیاه‌پالایی آب‌تره (Nasturium officinale L.) در رفع آلودگی کادمیوم. فصلنامه علوم و تکنولوژی محیط زیست. ۲۲ (۴)، ۲۷۸- ۲۹۸.
کافی، محمد؛ برزویی، اعظم؛ صالحی، معصوم؛ کمندی، علی؛ معصومی، علی و نباتی، جعفر (۱۴۰۰). فیزیولوژی تنش‌های محیطی در گیاهان. مشهد: انتشارات جهاد دانشگاهی. ۵۰۴ صفحه.
جهانتاب، اسفندیار؛ جعفری، محمد؛ متشرعزاده، بابک؛ طویلی، علی و ضرغام، نصرت الله (۱۳۹۵)، ارزیابی گونههای گیاهی مقاوم به فلزات سنگین در مناطق نفت‌خیز (مطالعه موردی: پازنان گچساران). نشریه مرتع. ۱۰ (۴)، ۴۰۹-۴۲۵.
مظفری، افشین؛ حبیبی، داود؛ ملکی، عباس و بابایی، فرزاد (۱۳۹۱). ارزیابی توان چند گونه زراعی درکاهش آلودگی خاک به فلز سنگین کادمیوم. نشریه زراعت و اصلاح نباتات ایران. ۸ (۳)، ۱-۱۴.
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