Effects of stress induced by post-emergence application of metribuzin herbicide on wheat
Year: 2012
Type: article
Abstract: Environmental contaminants such as heavy metals and organic pollutants such as herbicides may cause a variety of physiological or oxidative stresses in plants. Metribuzin is a triazinone herbicide that interferes with photosynthetic electron transport between the primary and secondary acceptors of photosystem II (PSII). In this study, the effects of metribuzin on the activities of certain enzymes of Triticum aestivum L. cv. Zarrin were determined. Thirty days old plants were treated with 20 ml metribuzin at recommended field dose (1.01 kg ha-1) through foliar application, and the plants were harvested after 7 days. The results show that metribuzin significantly increased the activities of guaiacol peroxidase, ascorbate peroxidase and polyphenol oxidase. However, metribuzin had no significant effect on the activity of glutathione reductase. Foliar application of metribuzin resulted in decrease in soluble carbohydrates. In addition, metribuzin significantly reduced shoot fresh and dry weights production of plants. These findings indicate an induced oxidative stress in wheat following metribuzin treatment.
Key words: Antioxidant enzymes, herbicide, metribuzin, Triticum aestivum.
Source: AFRICAN JOURNAL OF BIOTECHNOLOGY
DOI: 10.5897/ajb11.3446
Author: Razieh Rajabi
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2318504311