Effects on antioxidant enzyme activities and osmolytes in Halocnemum strobilaceum under salt stress |
| |
| Authors: | TianPeng Gao Rui Guo ZhiGang Zhao GuoHua Chang YinQuan Chen and Qing Zhang |
| |
| Institution: | Centre of Urban Ecology and Environmental Biotechnology, Lanzhou City University, Lanzhou, Gansu 730070, China;School of Chemistry and Environment Sciences, Lanzhou City University, Lanzhou, Gansu 730070, China;Centre of Urban Ecology and Environmental Biotechnology, Lanzhou City University, Lanzhou, Gansu 730070, China;State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China;Centre of Urban Ecology and Environmental Biotechnology, Lanzhou City University, Lanzhou, Gansu 730070, China;School of Chemistry and Environment Sciences, Lanzhou City University, Lanzhou, Gansu 730070, China;Centre of Urban Ecology and Environmental Biotechnology, Lanzhou City University, Lanzhou, Gansu 730070, China;School of Chemistry and Environment Sciences, Lanzhou City University, Lanzhou, Gansu 730070, China;Centre of Urban Ecology and Environmental Biotechnology, Lanzhou City University, Lanzhou, Gansu 730070, China |
| |
| Abstract: | The seedlings of Halocnermum strobilaceum were cultivated in 0.5% hoagland nutrient solution containing 0.0%, 0.9%, 2.7% and 5.4% of NaCl as well as composite salt (Na+, Ca2+, K+, Si4+) for 20 days; all the contents are in weight ratio. Succulent level, inorganic ions (Na+, K+), organics such as betaine, proline, malondialdehyde, and antioxidant enzyme activities including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), betaine aldehyde dehydrogenase (BADH) were measured to reveal its salt tolerance mechanism. When the composite salt concentration reaches 5.4%, SOD activity level, and MDA content is five times the control group; when it reaches 2.7%, the succulent level of seedlings, and the content of K+ in roots is nearly two times the NaCl treatment; the dry weight is more than three times the control group; with the NaCl treatment, MDA is three times the contrast; when the salt concentration is 2.7%, POD reaches the maximum. Results indicate that Si4+, K+, and Ca2+ from composite salt in the roots of H. strobilaceum improved the water-holding capacity. The activities of antioxidant enzyme were raised by the accumulation of proline and betaine, which increased the salt tolerance. The absorption of K+ promoted the high ratio of K+/Na+ and alleviated the damage of cell membranes of H. strobilaceum, which is associated with osmotic contents such as betaine and proline. |
| |
| Keywords: | Halocnermum strobilaceum (Pall ) salt stress succulent antioxidant enzyme activities |
| 本文献已被 CNKI 万方数据 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 |
|
