Table 2.
Effect of high temperature (30/25 °C) for 4 days at different stages of seed development and maturation in two cultivars of pea (Pisum sativum L.) on seed quality components (adapted from Shinohara et al. 2006b)
| Stage at treatment* | Mean seed weight (g) | Germination (percentage) | Hollow heart (proportion) | Average conductivity† (μS/cm/g) | ||||
|---|---|---|---|---|---|---|---|---|
| Alderman‡ | E. Onward‡ | Alderman | E. Onward | Alderman | E. Onward | Alderman | E. Onward | |
| Control | 379 | 350 | 95 | 93 | 0·04 | 0·00 | 220 | 363 |
| S1 | 309 | 289 | 84 | 97 | 0·01 | 0·03 | 315 | 368 |
| S2 | 326 | 262 | 86 | 92 | 0·24 | 0·04 | 367 | 374 |
| S3 | 391 | 345 | 86 | 96 | 0·08 | 0·00 | 339 | 467 |
| S4 | 378 | 362 | 88 | 98 | 0·01 | 0·00 | 371 | 475 |
| S5 | 376 | 337 | 92 | 96 | 0·04 | 0·00 | 424 | 420 |
| s.e.d. (d.f.) | 11 (18) | 9 (18) | 6·7 (18) | 3·9 (18) | 0·054 (18) | 0·020 (18) | 31 (140) | 123 (140) |
*
S1=beginning of seed filling (810 mg/g SMC); S2=rapid seed filling (700 mg/g SMC); S3=PM (630 mg/g SMC); S4=beginning of desiccation (440 mg/g SMC); S5=harvest maturity (230 mg/g SMC); SMCs are mean of the two cultivars.
†
Data are the average of 25 results in the single seed conductivity vigour test.
‡
Pea cultivars.
s.e.d. (between cultivars)=10 (mean seed weight), 5·4 (germination), 0·041 (hollow heart) and 71 (average conductivity).