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- Title
Oxidative stress enzymes in tobacco during a long-term exposure to ambient ozone at two different sites.
- Authors
Bandurska, Hanna; Borowiak, Klaudia; Zielezińska, Małgorzata
- Abstract
Tropospheric ozone is a harmful air pollutant which may cause oxidative stress in plant cells, leading to biochemical and physiological changes and yield reduction. The aim of the study was to examine the cumulative effect of long-term ozone stress on the activity of antioxidative enzymes in leaves of ozone sensitive and resistant tobacco cultivar growing at the sites of various ozone concentrations. The one-month experiment was conducted in the 2009, 2010 and 2011 growing seasons with different meteorological conditions and ozone concentrations. The activity of SOD, APX and GuPX was measured four times at weekly intervals. The highest tropospheric ozone concentration was recorded in 2010 along with high level of solar radiation and temperature. The enhanced ozone level caused the increase in the activity of all examined enzymes. However, at more elevated ozone level the activity of all enzymes was higher in sensitive (Bel W3) than resistant (Bel B) tobacco cultivar. On the other hand, at lower ozone level the activity of examined enzymes was rather similar in both cultivars or even higher in ozone-resistant one, which was especially valid for SOD. A positive correlation between the activity of all enzymes and ozone concentration was shown in both cultivars. The presented results show that meteorological conditions modify tropospheric ozone concentration and real plant response to this environmental pollutant. It is highly important to interpret week-by-week plant response and environmental conditions bearing in mind the cumulative ozone effect resulting from previous weeks conditions.
- Subjects
TROPOSPHERIC ozone; POLLUTANTS; OZONE; OXIDATIVE stress; TOBACCO smoke; ENZYMES; AIR pollutants; TOBACCO
- Publication
Archives of Environmental Protection, 2018, Vol 44, Issue 4, p3
- ISSN
2083-4772
- Publication type
Article
- DOI
10.24425/aep.2018.122297