A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Chauhan, Aprajita
- Peroxidase Activity as an Indicator of SO2- Tolerance in Crop Plants
Authors
Source
International Journal of Innovative Research and Development, Vol 4, No 13 (2015), Pagination:Abstract
Effect of different SO2 concentrations on the peroxidase activity in the leaves of three economically important plant species, viz., Vigna radiata (Mung bean), Solanum esculentum (= Lycopersicon esculentum) [Tomato] and Zea mays (Maize) was studied. Controlled fumigation experiments were carried out using three different treatments of SO2 : T-1 = 0.05 ppm(134.0µg m-3 SO2) [x 4h], T-2 = 0.1 ppm(268.0 µg m-3 SO2) [x 2h] and T-3 = 0.2 ppm(536.0 µg m-3 SO2) [x 1h] for 60 days. Although the peroxidase levels in controls were highest in Z.mays, followed by V.radiata and S.esculentum, it was S.esculentum which recorded maximum increase in peroxidase activity after SO2 fumigation, followed by V.radiata and Z.mays. Enhanced peroxidase activity is indicative of greater tolerance toSO2 stress.
Keywords
Free-radical scavengers, Maize, Mung bean, Peroxidases, SO2-tolerance, Tomato- Effect of SO2 on Ascorbic Acid Content in Crop Plants --First Line of Defence against Oxidative Stress
Authors
Source
International Journal of Innovative Research and Development, Vol 4, No 11 (2015), Pagination:Abstract
Effect of different SO2 concentrations on the ascorbic acid content in the leaves of three economically important plant species, viz., Vigna radiata (Mung bean), Solanum esculentum (= Lycopersicon esculentum)[Tomato] and Zea mays (Maize) was studied . Controlled fumigation experiments were carried out using three different treatments of SO2 : T-1 = 0.05 ppm (134.0µg m-3 SO2) [x 4h], T-2 = 0.1 ppm(268.0 µg m-3 SO2) [x 2h] and T-3 = 0.2 ppm (536.0 µg m-3 SO2) [x 1h] for 60 days. Whereas SO2 fumigation resulted in a progressive decrease in ascorbate content in both mung bean and tomato, there was in fact, a marginal increase in ascorbate in T-1 of Z.mays after 30 days followed by negligible reduction in the subsequent treatments. These studies highlight a positive correlation between ascorbic acid content and SO2-sensitivity of plants and indicate that Z.mays exhibits a relatively greater resistance to SO2-stress.