Table 3.
Parameters of the linear regression of rate of development against temperature of vernalized plants of L. fendleri and L. mendocina (floral bud appearance to first flower open)
| Intercept ± s.e. | Slope ± s.e. | Temperature (°C) | Duration of development | |||||
| Species | (1/d ×10–3) | (1/°Cd ×10–3) | r 2 | n* | P* | Base | Optimum | (TT, °Cd) |
| Emergence to floral bud appearance | ||||||||
| L. fendleri | –7·0 ± 2·71 | 2·7 ± 0·18 | 0·852 | 10 | <0·001 | 2·6 | ∼20·0 | 370·7 |
| L.mendocina | 10·2 ± 2·31 | 0·4 ± 0·16 | 0·130 | † | 0·04 | – | – | – |
| Floral bud appearance to first flower open | ||||||||
| L. fendleri | –41·2 ± 6·94 | 6·1 ± 0·41 | 0·853 | 10 | <0·001 | 6·1 | >24·0 | 165·2 |
| L.mendocina | –13·7 ± 3·53 | 4·0 ± 0·24 | 0·891 | † | <0·001 | 3·6 | >20·0 | 263·4 |
Durations in thermal time were calculated as the reciprocal of the slopes
* n is the sample size; P is the linear regression probability level.
† for 9 °C, n = 10; for 12 and 20 °C, n = 8; for 16 °C, n = 6.