Involvement of anti-oxidative enzymes, photosynthetic pigments and flavonoid metabolism in the adaptation of Reaumuria soongorica to salt stress |
| |
| Authors: | YuBing Liu Bo Cao and MeiLing Liu |
| |
| Institution: | Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province; Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province; Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province; Shapotou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China |
| |
| Abstract: | Reaumuria soongorica is a short woody shrub widely found in semi-arid areas of China. It can survive severe environmental stress including high salinity in its natural habitat. Thus, we investigated the involvement of anti-oxidative enzymes, photosynthetic pigments and flavonoid metabolism in the adaptation of R. soongorica to saline environments. R. soongorica was treated with 0, 100, 200 and 400 mM NaCl solutions for 14 days. Soil salt content increased significantly by watering with high content of NaCl solution, and no variation between 8 and 14 days during treatment. The levels of peroxidation of lipid membranes (measured by malondialdehyde content) and the activities of three antioxidant enzymes (superoxide dismutase (SOD), peroxidase (POD) and ascorbate peroxidase (APX)) increased under salt stress. Chlorophyll and carotenoid content decreased with increasing salt content. The ratio of Chl a/Chl b and carotenoid/Chl exhibited significant increase under 400 mM NaCl. However, total flavonoid and anthocyanin contents and key enzyme activities in the flavonoid pathway including phenylalanine ammonialyase (PAL) and Chalcone isomerase (CHI) decreased under salt stress. These findings possibly suggest that R. soongorica has an adaptation protection mechanism against salt-induced oxidative damage by inducing the activity of antioxidant enzymes and maintaining a steady level of carotenoid/Chl. |
| |
| Keywords: | antioxidant enzymes photosynthetic pigments flavonoid Reaumuria soongorica |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《寒旱区科学》浏览原始摘要信息 |
| 点击此处可从《寒旱区科学》下载免费的PDF全文 |
|
