Journal of Animal and Plant Sciences
J. Anim. Plant Sci. [ISSN 2071 - 7024]
Volume 6 (3): 700 - 708. Published April 28, 2010.
Effects of exogenous silicon onseed germination and antioxidant enzyme activities of Momordica charantia under salt stress
Xiao-dong Wang, Chao Ou-yang, Zhe-ren Fan, Shun Gao, Fang Chen and Lin Tang1
Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, 610064, Chengdu, P.R. China
1Corresponding author’s e-mail: tangl66@sina.com or tanglinscu@gmail.com
SUMMARY
The influences of exogenous silicon (Si) concentrations (1, 2, 3 and 5 mM ) on germination rate (GR), germination index (GI), and vitality index (VI), as well as malondialdehyde (MDA) contents, superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activities were investigated in Momordica charantia under 50 and 100 mM NaCl during 5, 10 and 15-day periods. Our results indicated that GR, GI and VI were significantly decreased when treated with 50 and 100 mM NaCl, but they improve significantly by the addition of different Si concentrations compared to those of salt stress conditions. MDA contents in the leaves decreased significantly at different treated periods by addition of different Si concentrations compared to that of salt stress (50 mM NaCl). However, the activities of SOD, POD and CAT were significantly increased compared to that of NaCl stress. These results suggested that exogenous silicon may increase GR, GI and VI, which contributes to reducing MDA contents and increase the antioxidant enzyme activities under NaCl stress
Key words
Momordica charantia, silicon, salt tolerance, ROS-scavenging enzymes
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