Chin J Plant Ecol ›› 2012, Vol. 36 ›› Issue (8): 849-858.DOI: 10.3724/SP.J.1258.2012.00849
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ZHANG Hong-Xiang*(), TIAN Yu, ZHOU Dao-Wei, ZHENG Wei, WANG Min-Ling
Received:
2011-11-08
Accepted:
2012-04-05
Online:
2012-11-08
Published:
2012-08-21
Contact:
ZHANG Hong-Xiang
ZHANG Hong-Xiang, TIAN Yu, ZHOU Dao-Wei, ZHENG Wei, WANG Min-Ling. Research on modeling germination response to salinity of barley seeds[J]. Chin J Plant Ecol, 2012, 36(8): 849-858.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2012.00849
Fig. 1 Germination courses for two varieties of barley ‘Cask’ and ‘County’ cultured in isotonic NaCl and polyethylene glycol (PEG) solutions at four temperatures.
品种 Variety | 温度 Temperature (℃) | 渗透调节物质 Osmotica | 水势常数 θH (MPa·h) | 最低水势 Ψb (50) (MPa) | 误差 σΨb (MPa) | R2 |
---|---|---|---|---|---|---|
‘Cask’ | 5 | NaCl | 428 | -2.51 | 0.63 | 0.83 |
PEG | 208 | -1.22 | 0.61 | 0.66 | ||
12 | NaCl | 115 | -1.70 | 0.71 | 0.85 | |
PEG | 65 | -0.77 | 0.22 | 0.89 | ||
20 | NaCl | 73 | -1.72 | 1.09 | 0.84 | |
PEG | 52 | -1.23 | 0.64 | 0.68 | ||
27 | NaCl | 36 | -0.56 | 1.21 | 0.73 | |
PEG | 34 | -0.65 | 0.87 | 0.67 | ||
‘County’ | 5 | NaCl | 355 | -2.55 | 0.83 | 0.58 |
PEG | 184 | -1.32 | 0.56 | 0.62 | ||
12 | NaCl | 115 | -1.93 | 1.18 | 0.65 | |
PEG | 63 | -0.86 | 0.55 | 0.57 | ||
20 | NaCl | 36 | -1.35 | 0.72 | 0.73 | |
PEG | 29 | -1.01 | 0.49 | 0.67 | ||
27 | NaCl | 20 | -0.80 | 0.65 | 0.70 | |
PEG | 30 | -1.16 | 0.74 | 0.51 |
Table 1 Parameter estimate of hydrotime model for seed germination of two varieties of barley under different salinities, polyethylene glycol (PEG) solutions and four temperatures
品种 Variety | 温度 Temperature (℃) | 渗透调节物质 Osmotica | 水势常数 θH (MPa·h) | 最低水势 Ψb (50) (MPa) | 误差 σΨb (MPa) | R2 |
---|---|---|---|---|---|---|
‘Cask’ | 5 | NaCl | 428 | -2.51 | 0.63 | 0.83 |
PEG | 208 | -1.22 | 0.61 | 0.66 | ||
12 | NaCl | 115 | -1.70 | 0.71 | 0.85 | |
PEG | 65 | -0.77 | 0.22 | 0.89 | ||
20 | NaCl | 73 | -1.72 | 1.09 | 0.84 | |
PEG | 52 | -1.23 | 0.64 | 0.68 | ||
27 | NaCl | 36 | -0.56 | 1.21 | 0.73 | |
PEG | 34 | -0.65 | 0.87 | 0.67 | ||
‘County’ | 5 | NaCl | 355 | -2.55 | 0.83 | 0.58 |
PEG | 184 | -1.32 | 0.56 | 0.62 | ||
12 | NaCl | 115 | -1.93 | 1.18 | 0.65 | |
PEG | 63 | -0.86 | 0.55 | 0.57 | ||
20 | NaCl | 36 | -1.35 | 0.72 | 0.73 | |
PEG | 29 | -1.01 | 0.49 | 0.67 | ||
27 | NaCl | 20 | -0.80 | 0.65 | 0.70 | |
PEG | 30 | -1.16 | 0.74 | 0.51 |
Fig. 2 Germination rate plotted against external salinity concentration for two varieties of barley ‘Cask’ and ‘County’ at four temperatures (mean ± SE).
品种 Cultivar | 温度 Temperature (℃) | 萌发率 Germination (%) | 盐度常数 θS (mmol·L-1·d-1) | 最高盐度 Sm (mmol·L-1) | R2 | p |
---|---|---|---|---|---|---|
‘Cask’ | 5 | 1 | 3 333.3 | 621.3 | 0.99 | 0.000 8 |
50 | 5 000.0 | 712.0 | 0.98 | 0.000 8 | ||
12 | 1 | 833.3 | 552.8 | 0.98 | 0.001 0 | |
50 | 909.1 | 392.6 | 0.98 | 0.093 4 | ||
20 | 1 | 500.0 | 612.4 | 0.99 | 0.000 6 | |
50 | 1 000.0 | 573.0 | 0.99 | 0.039 5 | ||
27 | 1 | 416.7 | 609.6 | 0.99 | 0.000 7 | |
50* | ||||||
‘County’ | 5 | 1 | 3 333.3 | 796.0 | 0.99 | 0.000 3 |
50 | 3 333.3 | 638.0 | 0.94 | 0.006 7 | ||
12 | 1 | 769.2 | 600.3 | 0.96 | 0.003 1 | |
50 | 1 000.0 | 558.5 | 0.89 | 0.015 6 | ||
20 | 1 | 357.1 | 528.9 | 0.96 | 0.003 5 | |
50 | 370.4 | 382.9 | 0.99 | 0.067 2 | ||
27 | 1 | 227.3 | 390.9 | 0.88 | 0.223 7 | |
50* |
Table 2 Parameter estimate of salinity model for seed germination of two varieties of barley under different salinities and four temperatures
品种 Cultivar | 温度 Temperature (℃) | 萌发率 Germination (%) | 盐度常数 θS (mmol·L-1·d-1) | 最高盐度 Sm (mmol·L-1) | R2 | p |
---|---|---|---|---|---|---|
‘Cask’ | 5 | 1 | 3 333.3 | 621.3 | 0.99 | 0.000 8 |
50 | 5 000.0 | 712.0 | 0.98 | 0.000 8 | ||
12 | 1 | 833.3 | 552.8 | 0.98 | 0.001 0 | |
50 | 909.1 | 392.6 | 0.98 | 0.093 4 | ||
20 | 1 | 500.0 | 612.4 | 0.99 | 0.000 6 | |
50 | 1 000.0 | 573.0 | 0.99 | 0.039 5 | ||
27 | 1 | 416.7 | 609.6 | 0.99 | 0.000 7 | |
50* | ||||||
‘County’ | 5 | 1 | 3 333.3 | 796.0 | 0.99 | 0.000 3 |
50 | 3 333.3 | 638.0 | 0.94 | 0.006 7 | ||
12 | 1 | 769.2 | 600.3 | 0.96 | 0.003 1 | |
50 | 1 000.0 | 558.5 | 0.89 | 0.015 6 | ||
20 | 1 | 357.1 | 528.9 | 0.96 | 0.003 5 | |
50 | 370.4 | 382.9 | 0.99 | 0.067 2 | ||
27 | 1 | 227.3 | 390.9 | 0.88 | 0.223 7 | |
50* |
Fig. 3 Comparison of germination time between the real data (50% germination) and the data predicted by hydrotime model and salinity model for two varieties of barley.
Fig. 4 Difference of germination rate between binate iso-osmotic NaCl and polyethylene glycol (PEG) plotted against external water potential for two varieties of barley ‘Cask’ and ‘County’ at four temperatures.
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