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https://hdl.handle.net/2440/118542
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Type: | Journal article |
Title: | Oxidative stress response induced in an atrazine phytoremediating plant: physiological responses of Pennisetum glaucum to high atrazine concentrations |
Author: | Erinle, K. Jiang, Z. Li, M. Su, G. Ma, B. Ma, Y. Zhang, Y. |
Citation: | International Journal of Phytoremediation, 2016; 18(12):1187-1194 |
Publisher: | Taylor & Francis |
Issue Date: | 2016 |
ISSN: | 1522-6514 1549-7879 |
Statement of Responsibility: | Kehinde Olajide Erinle, Zhao Jiang, Mengyuan Li, Guangxia Su, Bingbing Ma, Yuheng Ma and Ying Zhang |
Abstract: | This research presented here, for the first time, elucidates the responses of several antioxidants in Pennisetum leaves exposed to varying concentrations of atrazine (0 - 200 mg•kg-1). Pennisetum has been reported to be resistant to atrazine; however, its physiological response to high concentrations (≥ 50 mg•kg-1) of atrazine is not well documented. The contents of reduced (AsA) and oxidized (DHA) ascorbate increased significantly with increase in atrazine concentration and exposure time; but the increase was more evident under higher (50 and 100 mg•kg-1) atrazine concentrations. Increase in atrazine concentration to 200 mg•kg-1 significantly decreased AsA, but increased DHA content, throughout the experiment. Seedlings treated with 200 mg•kg-1 atrazine showed significantly lowest reduced glutathione (GSH) content; while oxidized glutathione (GSSG) was not significantly affected, after 68d. Seedlings treated with 100 mg•kg-1 atrazine showed increased Glutathione-S-Transferase (GST) activity after 48 d and 68 d; while treatment with 200 mg•kg-1 atrazine significantly increased Glutathione reductase (GR) after 58d. This result suggests that Pennisetum may tolerate lower atrazine concentrations; However, higher concentrations (≥50 mg•kg-1) which could have longer residency period in the soil, could induce more physiological damage to the plant. |
Keywords: | Antioxidant enzymes Pennisetum glutathione pools phytoremediation stress tolerance |
Rights: | © 2016 Taylor & Francis Group, LLC |
DOI: | 10.1080/15226514.2016.1193464 |
Published version: | http://dx.doi.org/10.1080/15226514.2016.1193464 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 4 |
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