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| Effects of Salt Stress on Physiological Characteristics of Reaumuria soongorica Seeds during Imbibition |
| Gao Qian1, Li Yi1, Su Shiping1, Анатолий Васильевич Жигунов2, Shan Lishan1, Chong Peifang1 |
1. College of Forestry, Gansu Agricultural University, Lanzhou 730070, China;
2. Санкт-Петербургский научно-исследовательский институт лесного хозяйства, Россия, Санкт-Петербург, 19. 197183 |
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Abstract The effects of salt stress on physiological characteristics of Reaumuria soongorica seeds during imbibition and the damage of salts on seeds were discussed. Seven salts concentrations with 0%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5% and 3.0% of NaCl and CaCl2 were designed in this study. The results showed that percent germination of Reaumuria soongorica seeds significantly decreased with increasing salts concentration. The content of malondialdehyde (MDA) decreased firstly and then increased as NaCl concentration increased, and reached the maximum and minimum value at salt densities of 1.0% and 2.5%. The content of MDA rose with increasing CaCl2 concentration, and was significantly higher than that in controlled trial, and reached the maximum value at salt density 3.0%; The content of soluble sugar decreased firstly and then increased with increasing salt concentrations, and reached minimum at salt densities of 1.0% and 2.0%; The catalase (CAT) activity changed little as the two salts concentrations increased; The peroxidase (POD) activity significantly decreased with increased salts concentrations; The activities of superoxide dismutase (SOD) decreased firstly, then increased and decreased at last with the two salts concentrations increase, and was lower than that in controlled trial. The damage of CaCl2 on Reaumuria soongorica seeds was bigger than NaCl.
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Received: 03 December 2012
Published: 20 January 2014
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Corresponding Authors:
李毅，liyi@gsau.edu.cn
E-mail: liyi@gsau.edu.cn
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2014, Vol. 34 
