Effect of triadimefon: a triazole fungicide on oxidative stress defense system and eugenol content in Ocimum tenuiflorum L.

Abstract

The effect of triadimefon (TDM) a triazole compound on antioxidant potential and eugenol content was studied in Ocimum tenuiflorum L. The plant was subjected to 15 mg/l TDM by soil-drenching on 50th, 70th and 90th days after planting (DAP). Analyses were carried out on 60th, 80th and 100th DAP. Both enzymatic and nonenzymatic antioxidant potential estimation was carried out. The non-enzymatic antioxidant viz ascorbic acid, a-tocopherol and reduced glutathione were found to increase under triadimefon treatment. The antioxidant enzyme like superoxide dismutase, ascorbate peroxidase and catalase activities showed significant increase in TDM treatment. Triazole-treated plants yielded more eugenol (a major component of Ocimum-essential oil) in comparison to control. The study evidenced that TDM residues could be detected in the upper soil layer only and does not accumulate in the soil. These preliminary results suggest that TDM may be useful to increase the antioxidant content in medicinal plants and also to act as an elicitor to enhance the production of secondary metabolites of medicinal plants.

Protective effects of green tea on antioxidative biomarkers in chemical laboratory workers

“…Extensive laboratory and epidemiological studies have suggested that GT and GT polyphenols, especially EGCG, have preventive effects against chronic diseases including heart disease, diabetes, neurodegenerative disease, and cancer (Frei and Higdon, 2003). Numerous mechanisms have been proposed to account for the cancer preventive effects of GT and EGCG in laboratory animal models (Cai et al, 2002; Imai et al, 1997; Kumar et al, 2012) The antioxidant activity of GT polyphenols and, more recently, the prooxidant effects of these compounds have also been suggested as potential mechanisms for cancer prevention (Divya Nair et al, 2012; Frei and Higdon, 2003; Lambert and Elias, 2010).…”

“…It is believed that medicinal plants are a potential source of antioxidants and ROS scavenger molecules (Arora et al, 2005; Divya Nair et al, 2012; Hatcher et al, 2012). Previous studies indicated the antioxidative property of medical plants such as GT (Azam et al, 2004; Thiagarajan et al, 2001), Cinnamomum zeylanicum (Ranjbar et al, 2006a), and Echium amoenum Fisch & C.A (Ranjbar et al, 2006b) have shown both the trapping effect of ROS as well as the inhibitory effect of lipid peroxidation and induction of TAC (Negishi et al, 2004).…”