Table 2: The effect of temperature regime on the germination characteristics of Calluna vulgaris seeds under a photoperiod of 8 h. Storage period at room temperature before trial: 6 days. Mean values ± standard deviations. In each column, groups that showed significant differences ( ) are indicated with different letters.

Temperature regime (°C)Number of seedsDays to first radicle emergenceMean time of germination (days)Percent germination (at day 126)

104 × 10017 ± 2.0a44 ± 3.1a93 ± 5.8a
154 × 10015 ± 1.7a34 ± 3.0b90 ± 7.0a
204 × 10015 ± 1.5a33 ± 5.2b65 ± 6.8b
20–10 4 × 10017 ± 1.0a32 ± 2.8b74 ± 6.5b