KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus | |
Tang, Haoran1,2; Bai, Jiangshan1,2; Chen, Fangyuan1,2; Liu, Ying3; Lou, Yanjing1
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| 2021-03-01 | |
| 摘要 | In a scenario of climate change and intensive land-use change, the issue of salt marsh degradation caused by global warming and soil salinization is becoming more serious. A climate chamber experiment was conducted to examine the responses of tuber sprouting and seedling growth of Schoenoplectus nipponicus to variations in the temperature regimes (20/10, 25/15, 30/20 and 35/25 degrees C; 12-h light/dark 12-h photoperiod) and different salt concentrations (0, 50, 75, and 100 mmol/L salinity). Results showed that the final sprouting percentage decreased with the increase in salinity and increased with the rising temperature. Salinity lower than 50 mmol/L was the most favorable for tuber sprouting. Under high salinity (75 and 100 mmol/L salinity), the inhibition of tuber sprouting at 20/10 degrees C was greater than other temperature regimes. Along the temperature gradients, both plant height and leaf N content increased, and root length decreased under non-saline-alkali conditions, while plant height, leaf N content, and root length declined significantly under salt stress (50, 75, and 100 mmol/L salinity). With the increase in temperature, the production of tubers under the control treatments was enhanced significantly, but that under salt stress declined significantly. Under 0 mmol/L salinity, the accumulation of biomass in various organs increased with rising temperature. Biomass accumulation increased first and then declined for plants grown under salt stress, with a peak value of 25/15 degrees C. Root: shoot ratio was reduced significantly under the combination of high salt stress (75 and 100 mmol/L salinity) and high temperatures (30/20 degrees C and 35/25 degrees C). Our study will contribute to a better understanding of the influence of climate warming and increasing serious human disturbances on this important wetland species. |
| 关键词 | biomass bulbous sedge climate warming clonal reproduction functional traits propagation salt marsh soil salinization |
| DOI | 10.1002/ecs2.3448 |
| 发表期刊 | ECOSPHERE
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| ISSN | 2150-8925 |
| 卷号 | 12期号:3页码:15 |
| 通讯作者 | Lou, Yanjing(louyj@iga.ac.cn) |
| 收录类别 | SCI |
| WOS记录号 | WOS:000636318200036 |
| 语种 | 英语 |
