کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5746301 | 1618794 | 2017 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physiological and antioxidant response of wheat (Triticum aestivum) seedlings to fluoroquinolone antibiotics
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Combinations of antibiotics occur in terrestrial environments due to excessive prescription, consumption, and disposal and have adverse effects, including crop toxicity. We examined short-term (20-d) toxicity of the fluoroquinolone antibiotics ciprofloxacin, enrofloxacin, levofloxacin, and their mixture in a germination and a greenhouse sand culture study with wheat. We tested the hypothesis that oxidative stress plays a role in toxicity by examining stress products and antioxidants involved in detoxifying reactive oxygen species (ROS) during stress. Germination was unaffected by any antibiotic concentration or mixture used. The highest antibiotic concentrations, 100 and 300 mg Lâ1, significantly decreased wheat growth. In 20 days exposure the maximum malondialdehyde production (2.45 μmol gâ1 fresh weight), total phenols (16.40 mg gâ1 of extract), and total antioxidant capacity (17.74 mg of Vitamin C gâ1 of extract) and maximum activities of superoxide dismutase (7.99 units mgâ1 protein minâ1) and ascorbate peroxidase (0.69 μmol ascorbate mgâ1 protein minâ1) significantly increased compared to the control. In contrast, catalase (0.45 mmol H2O2 mgâ1 protein minâ1) and peroxidase (0.0005 units mgâ1 protein minâ1) activity significantly decreased compared to the control. We conclude that high antibiotic concentrations in the plant growth medium reduced wheat growth by causing oxidative stress. The capacity to respond to oxidative stress was compromised by increasingly higher antibiotic concentrations in some enzyme systems. This stress damaged the physiological structure of the young plants and could reduce crop productivity in the long term. Consequently, fluoroquinolone-contaminated water challenges developing countries with constraints on available water for irrigation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 177, June 2017, Pages 250-257
Journal: Chemosphere - Volume 177, June 2017, Pages 250-257
نویسندگان
Luqman Riaz, Tariq Mahmood, Mark S. Coyne, Azeem Khalid, Audil Rashid, Malik Tahir Hayat, Asim Gulzar, Muhammad Amjad,