Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus

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论文题目:	Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus
英文论文题目:	Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus
第一作者:	Tang, Haoran
英文第一作者:	Tang, Haoran
联系作者:	娄彦景
英文联系作者:	louyanjing
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发表年度:	2021
卷:	12
期:	3
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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.
英文摘要:	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.
刊物名称:	Ecosphere
英文刊物名称:	Ecosphere
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参与作者:	H. Tang, J. Bai, F. Chen, Y. Liu and Y. Lou
英文参与作者:	H. Tang, J. Bai, F. Chen, Y. Liu and Y. Lou

Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus

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