Table 2.
Coefficient of initial diffusion (D/ρ2), mean velocity (vm), and mean acceleration (am) of water dynamics on germinating diaspores.
| Species | Diaspore sample1 | D/ρ2 (h−1) | v m (gH2Oh−1) | a m (gH2Oh−2) |
|---|---|---|---|---|
| Phaseolus vulgaris L. | Low physiological quality | 1.94 · 10−3 | 0.0320 (0.0250; 0.0390) | 0.0028 (-0.0048; 0.0044) |
| Intermediate physiological quality | 2.27 · 10−3 | 0.0335 (0.0294; 0.0326) | 0.0081 (-0.0028; 0.0094) | |
| High physiological quality | 2.45 · 10−3 | 0.0309 (0.0276; 0.0341) | -0.0005 (-0.0042; -0.0067) | |
| Helianthus annuus L. | Low physiological quality | 1.95 · 10−3 | 0.0216 (0.0141; 0.0512) | -0. 0400 (-0. 0251; 0.008) |
| Intermediate physiological quality | 4.11 · 10−2 | 0.0278 (0.0103; 0.0482) | -0.01130 (-0.0373; 0.0009) | |
| High physiological quality | 1.44 · 10−2 | 0.0274 (0.0127; 0.0421) | -0.0140 (-0.0311; 0.0076) | |
| Zea mays L. (creole type) | Low physiological quality | 2.93 · 10−3 | 0.0130 (0.0089; 0.0170) | 0.0052 (-0.0008; 0.0058) |
| Intermediate physiological quality | 1.91 · 10−2 | 0.0131 (0.0069; 0.0193) | -0.0089 (-0.0159; -0.0016) | |
| High physiological quality | 2.21 · 10−2 | 0.0096 (0.0051; 0.0210) | -0.0049 (-0.0114; 0.0016) | |
| Zea mays L. (hybrid type) | Low physiological quality | 5.84 · 10−2 | 0.0091 (0.0020; 0.0199) | -0.0024 (-0.0080; 0.0032) |
| Intermediate physiological quality | 8.86 · 10−2 | 0.0090 (0.0038; 0.0142) | -0.0036 (-0.0068; -0.0005) | |
| High physiological quality | 2.61 · 10−2 | 0.0088 (0.0076; 0.0101) | 0.0013 (-0.0077; 0.0030) | |
| Glycine max L. | Low physiological quality | 1.38 · 10−3 | 0.0550 (0.0279; 0.0822) | -0.0184 (-0.0391; 0.0298) |
| Intermediate physiological quality | 1.83 · 10−3 | 0.0578 (0.0278; 0.0882) | -0.0182 (-0.0468; 0.0105) | |
| High physiological quality | 1.57 · 10−3 | 0.0548 (0.0355; 0.0074) | -0.0164 (-0.0310; -0.0019) | |
| Triticum aestivum L. | Low physiological quality | 3.73 · 10−3 | 0.0259 (0.0202; 0.0360) | -0.0190 (-0.0057; 0.0057) |
| Intermediate physiological quality | 1.77 · 10−2 | 0.0296 (0.0236; 0.0357) | -0.0123 (-0.0183; -0.0063) | |
| High physiological quality | 8.48 · 10−3 | 0.0085 (0.0012; 0.0158) | -0.0193 (-0.0052; -0.0034) |
Note: 1physiological quality describes viability (V) and germinability (G) in the sample: high physiological quality is related to a diaspore sample with viability (V) and germinability (G) higher than 90%, intermediate physiological quality is a diaspore sample with 61% ≤ V ≤ 89% and 51% ≤ G ≤ 89%, and low physiological quality is a diaspore sample with V ≤ 60% and G ≤ 50%; D/ρ2 is a parameter of Fick's second law from a data set to perfect fitting and, hence, without variability measurements. The values of vm and represent the average (lower confidence interval; upper confidence interval) obtained from 1 000 Monte Carlo simulations at 0.05. n = 50 diaspores.