|
| Characteristics of Na+ absorption and transport of Phragmites communis in artificial saline wetlands |
| Received:May 24, 2018 |
| View Full Text View/Add Comment Download reader |
| KeyWord:Phragmites communis;saline-alkali wetland;Na+ transport characteristics;desalination |
| Author Name | Affiliation | E-mail | | WANG Chen | College of Life Science Ningxia University, Yinchuan 750021, China
State Key Laboratory of the Seedling Bioengineering of Ningxia Forestry Institute, Yinchuan 750004, China | | | TAN Ling-ling | College of Life Science Qingdao Agricultural University, Qingdao 266109, China | | | NI Xi-lu | State Key Laboratory of the Seedling Bioengineering of Ningxia Forestry Institute, Yinchuan 750004, China
Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750002, China | nixilu110@163.com | | LI Chang-xiao | College of Life Science Southwest University, Chongqing 400715, China | | | LI Jian | College of Life Science Ningxia University, Yinchuan 750021, China
State Key Laboratory of the Seedling Bioengineering of Ningxia Forestry Institute, Yinchuan 750004, China | |
|
| Hits: 2511 |
| Download times: 3023 |
| Abstract: |
| The characteristics of both Na+ transport in Phragmites communis and Na+ distribution in a wetland system were investigated by constructing an artificial saline-alkaline wetland. Four treatments, namely CK, T1 (irrigation with 100 mmol·L-1 saline water), T2 (irrigation with 200 mmol·L-1 saline water), and T3 (irrigation with 300 mmol·L-1 saline water), were set up for the experiment. The effect of wetland salinity on the balance of Na+ and K+ in P. communis and its Na+ transport characteristics were analyzed via the variation in Na+/K+ and the former's Na+/K+ transfer factor under different treatments in different periods. The removal ratios of Na+ and K+ from soil and water were calculated to analyze the desalination of wetlands by P. communis. The results indicated that in P. communis treated with high concentrations of NaCl (T3), the Na+ content in the aboveground and underground parts of the plants eventually increased 6.09 and 1.61 times, respectively, compared with CK, while the K+ content in aboveground and underground parts eventually decreased 26.88% and 18.10%, respectively. The Na+/K+ in the aboveground parts increased gradually while the opposite trend occurred in the underground parts. The Na+ transfer factor of CK and T1 decreased gradually while that of T2 and T3 showed the opposite trend. The removal ratios of Na+ and K+ from soil in the treatment groups ranged from 11.0% to 13.4% and 3.8% to 9.8%, respectively, and the removal ratios of Na+ and K+ from water in the treatment groups ranged from 42.7% to 51.6% and 6.8% to 74.2%, respectively. The above results indicated that salt stress affected the balance of Na+ and K+ in P. communis, and that the plant can effectively absorb and transport Na+ from its underground parts to its aboveground parts. In addition, P. communis had a role in removal of Na+ and wetland desalination, while the presence of a high Na+ concentration had a negative effect on the absorption and removal of K+. |
|
|
|
