Chin J Plant Ecol ›› 2011, Vol. 35 ›› Issue (3): 237-246.DOI: 10.3724/SP.J.1258.2011.00237
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SHEN Jian-Hong, ZENG Bo*(), LEI Shu-Tong, SU Xiao-Lei, HUANG Wen-Jun
Received:
2010-02-09
Accepted:
2011-01-04
Online:
2011-02-09
Published:
2011-03-02
Contact:
ZENG Bo
SHEN Jian-Hong, ZENG Bo, LEI Shu-Tong, SU Xiao-Lei, HUANG Wen-Jun. Seed submergence tolerance of four annual species growing in the water-level-fluctuation zone of Three Gorges Reservoir, China, and effects of long-term submergence on their seed germination[J]. Chin J Plant Ecol, 2011, 35(3): 237-246.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2011.00237
Fig. 1 Variation of water level and air temperature at Zhongxian County section of Three Gorges Reservoir between September 15th, 2008 and September 15th, 2009.
高程 Elevation (m) | 145-150 | 150-155 | 155-160 | 160-163 | 163-166 | 166-169 | 169-172 | 172-175 | >175 |
---|---|---|---|---|---|---|---|---|---|
水淹日期 Water impoundment date | 2008-09-28 | 2008-09-30 | 2008-10-05 | 2008-10-24 | 2008-10-29 | 2008-11-01 | 2008-11-03 | 2008-11-05 | - |
出水日期 Water recession date | 2009-06-19 | 2009-06-01 | 2009-05-21 | 2009-04-30 | 2009-03-10 | 2009-02-24 | 2009-01-31 | 2008-11-20 | - |
水淹天数 Submergence duration (d) | 245-270 | 228-245 | 189-228 | 133-189 | 116-133 | 91-116 | 17-91 | 0-17 | 0 |
Table 1 Water impoundment date, water recession date and submergence duration of different elevations in water-level-fluctuation zone at Zhongxian County section after tentative water impoundment of Three Gorges Reservoir in 2008
高程 Elevation (m) | 145-150 | 150-155 | 155-160 | 160-163 | 163-166 | 166-169 | 169-172 | 172-175 | >175 |
---|---|---|---|---|---|---|---|---|---|
水淹日期 Water impoundment date | 2008-09-28 | 2008-09-30 | 2008-10-05 | 2008-10-24 | 2008-10-29 | 2008-11-01 | 2008-11-03 | 2008-11-05 | - |
出水日期 Water recession date | 2009-06-19 | 2009-06-01 | 2009-05-21 | 2009-04-30 | 2009-03-10 | 2009-02-24 | 2009-01-31 | 2008-11-20 | - |
水淹天数 Submergence duration (d) | 245-270 | 228-245 | 189-228 | 133-189 | 116-133 | 91-116 | 17-91 | 0-17 | 0 |
高程 Elevation (m) | 种子出水日期 Water recession date | 稗 E. crusgalli | 苍耳 X. sibiricum | 合萌 A. indica | 水蓼 P. hydropiper | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
WT | YT | WT | YT | WT | YT | WT | YT | |||||
>175 | 2008-11-06 | 2009-03-10 | 2009-03-30 | 2009-03-28 | 2009-03-25 | 2009-04-01 | - | 2008-12-29 | - | |||
172-175 | 2008-11-12 | 2009-03-03 | 2009-03-02 | 2009-03-19 | 2009-03-20 | 2009-04-11 | 2009-04-11 | 2008-12-31 | 2008-12-31 | |||
169-172 | 2008-12-02 | 2009-02-25 | 2009-02-25 | 2009-03-04 | 2009-03-02 | 2009-04-04 | 2009-04-02 | 2009-01-06 | 2009-01-06 | |||
166-169 | 2009-02-20 | 2009-03-11 | 2009-03-11 | 2009-03-18 | 2009-03-18 | 2009-03-24 | 2009-03-26 | 2009-03-06 | 2009-03-06 | |||
163-166 | 2009-03-01 | 2009-03-14 | 2009-03-15 | 2009-03-14 | 2009-03-14 | 2009-03-28 | 2009-04-01 | 2009-03-11 | 2009-03-11 | |||
160-163 | 2009-03-28 | 2009-04-10 | 2009-04-14 | 2009-04-06 | 2009-04-11 | 2009-04-25 | 2009-04-26 | 2009-04-04 | 2009-04-04 | |||
155-160 | 2009-05-01 | 2009-05-08 | 2009-05-07 | 2009-05-04 | 2009-05-05 | 2009-05-15 | 2009-05-15 | 2009-05-08 | 2009-05-08 | |||
150-155 | 2009-05-29 | 2009-06-08 | 2009-06-06 | 2009-06-02 | 2009-06-04 | 2009-06-09 | 2009-06-08 | 2009-06-08 | 2009-06-04 | |||
145-150 | 2009-06-06 | 2009-06-13 | 2009-06-13 | 2009-06-17 | 2009-06-16 | 2009-06-13 | 2009-06-15 | 2009-06-15 | 2009-06-13 |
Table 2 The starting date for seed germination of Echinochloa crusgalli, Xanthium sibiricum, Aeschynomene indica and Polygonum hydropiper at different elevations
高程 Elevation (m) | 种子出水日期 Water recession date | 稗 E. crusgalli | 苍耳 X. sibiricum | 合萌 A. indica | 水蓼 P. hydropiper | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
WT | YT | WT | YT | WT | YT | WT | YT | |||||
>175 | 2008-11-06 | 2009-03-10 | 2009-03-30 | 2009-03-28 | 2009-03-25 | 2009-04-01 | - | 2008-12-29 | - | |||
172-175 | 2008-11-12 | 2009-03-03 | 2009-03-02 | 2009-03-19 | 2009-03-20 | 2009-04-11 | 2009-04-11 | 2008-12-31 | 2008-12-31 | |||
169-172 | 2008-12-02 | 2009-02-25 | 2009-02-25 | 2009-03-04 | 2009-03-02 | 2009-04-04 | 2009-04-02 | 2009-01-06 | 2009-01-06 | |||
166-169 | 2009-02-20 | 2009-03-11 | 2009-03-11 | 2009-03-18 | 2009-03-18 | 2009-03-24 | 2009-03-26 | 2009-03-06 | 2009-03-06 | |||
163-166 | 2009-03-01 | 2009-03-14 | 2009-03-15 | 2009-03-14 | 2009-03-14 | 2009-03-28 | 2009-04-01 | 2009-03-11 | 2009-03-11 | |||
160-163 | 2009-03-28 | 2009-04-10 | 2009-04-14 | 2009-04-06 | 2009-04-11 | 2009-04-25 | 2009-04-26 | 2009-04-04 | 2009-04-04 | |||
155-160 | 2009-05-01 | 2009-05-08 | 2009-05-07 | 2009-05-04 | 2009-05-05 | 2009-05-15 | 2009-05-15 | 2009-05-08 | 2009-05-08 | |||
150-155 | 2009-05-29 | 2009-06-08 | 2009-06-06 | 2009-06-02 | 2009-06-04 | 2009-06-09 | 2009-06-08 | 2009-06-08 | 2009-06-04 | |||
145-150 | 2009-06-06 | 2009-06-13 | 2009-06-13 | 2009-06-17 | 2009-06-16 | 2009-06-13 | 2009-06-15 | 2009-06-15 | 2009-06-13 |
Fig. 2 Starting time for seed germination after the end of submergence and seed germination duration (mean ± SE) of Echinochloa crusgalli (A), Xanthium sibiricum (B), Aeschynomene indica (C) and Polygonum hydropiper (D) at different elevations. WD, seed germination duration without sand sediment on surface; WS, starting time for seed germination after the end of submergence without sand sediment on surface; YD, seed germination duration with sand sediment on surface; YS, starting time for seed germination after the end of submergence with sand sediment on surface.
Fig. 3 Starting time for seed germination after the end of submergence and seed germination duration (mean ± SE) of Echinochloa crusgalli, Xanthium sibiricum, Aeschynomene indica and Polygonum hydropiper at the same elevation. WD, seed germination duration without sand sediment on surface; WS, starting time for seed germination after the end of submergence without sand sediment on surface; YD, seed germination duration with sand sediment on surface; YS, starting time for seed germination after the end of submergence with sand sediment on surface.
Fig. 4 Seed germination percentage (mean ± SE) of Echinochloa crusgalli (A), Xanthium sibiricum (B), Aeschynomene indica (C) and Polygonum hydropiper (D) at different elevations.
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