Volume 10, Issue 45 (vol. 10, no. 45 2021)                   2021, 10(45): 175-188 | Back to browse issues page

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Nemati M, SalehiLisar S Y, Movafeghi A, Motafakkerazad R. The effect of different concentrations of pyrene on photosynthetic pigment content and antioxidant enzyme activities in sunflower (Helianthus annuus). Plant Process and Function 2021; 10 (45) : 12
URL: http://jispp.iut.ac.ir/article-1-1476-en.html
1- Department of Plant Science, Faculty of Natural Sciences
2- Department of Plant Science, Faculty of Natural Sciences , y_salehi@tabrizu.ac.ir
Abstract:   (904 Views)
World industrialization and population growth are the main reasons for the increase of environmental contamination with aromatic hydrocarbons. The presence of these compounds in the environment leads to a variety of stresses in plants and finally reduces their growth. Pyrene is one of the major toxic contaminants belonging to polycyclic aromatic hydrocarbons. Hence, in this research, the effect of 50 and 100 ppm of pyrene on growth indices, photosynthetic pigment contents, the activity of some antioxidant enzymes, malondialdehyde content, and amount of hydrogen peroxide in sunflower were examined. Pyrene significantly reduced chlorophyll, and anthocyanin contents, catalase activity, as well as hydrogen peroxide content compared to the control, while the amount of plant carotenoids, the activity of superoxide dismutase  and peroxidase enzymes as well as malondialdehyde content were increased in the roots and shoots of sunflower. Based on the obtained results, pyrene probably caused an oxidative stress and lipid peroxidation that eventually reduced photosynthetic pigments and plant growth. 
Article number: 12
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Type of Study: Research | Subject: others
Received: 2020/11/22 | Accepted: 2021/05/11 | Published: 2021/12/20

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