Article Sidebar
Published:
Aug 28, 2019Keywords:
Article Details
Submission of a paper for publication implies the transfer of the copyright from the author(s) to the publisher upon acceptance. International Formulae Group is therefore the copyright holder after publication of an article in International Journal of Biological and Chemical Sciences, and published articles should not be used for commercial purpose without the written consent of the Editor-in-Chief. They are licensed under a Creative Commons Attribution-Non Commercial-Share Alike 4.0 International License.
Main Article Content
Time course of antioxidant enzymes in the paraquat-resistant and tolerant Heary fleabane (Conyza bonariensis) biotypes in response to ozone exposure and paraquat application
Abstract
In order to investigate the molecular mechanism of oxidative stress resistance due to either paraquat or ozone in plants, two paraquat biotypes (resistant and sensitive) of Conyza bonariensis were used. We monitored some biochemical parameters (total peroxydase, guaiacol peroxydase, ascorbate peroxydase and superoxyde dismutase) following a paraquat fumigation (0.001%, 4 hours), and a pulse of elevated ozone (200 ppb, 5 hours) or intermediate ozone (50 ppb, 4 hours). The mechanisms of protection induced by ozone exposure were not similar to the pathway leading to paraquat resistance, due to a different stimulation response system to antioxidants.
© 2019 International Formulae Group. All rights reserved
Keywords: Antioxidants, Halliwell-Asada cycle, Ozone, Paraquat, Conyza bonariensis
