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http://dx.doi.org/10.7732/kjpr.2016.29.5.564

Dormancy and Germination Characteristics of Round-Leaved Sundew (Drosera rotundifolia L.) Seeds Native to Korea  

Cho, Ju Sung (Department of Horticultural Science, Chungbuk National University)
Lee, Cheol Hee (Department of Horticultural Science, Chungbuk National University)
Publication Information
Korean Journal of Plant Resources / v.29, no.5, 2016 , pp. 564-573 More about this Journal
Abstract
This research was performed to develop mass propagation method of round-leaved sundew (Drosera rotundifolia L.) for improving horticultural usefulness. Seeds were collected around Hwaseong-si, Gyeonggi-do in October of 2011 and experimented upon while being dry-stored at 4 ± 1.0℃ (darkness). Seed length of a major and minor axis were 1.58 ± 0.060 and 0.21 ± 0.016 ㎜, respecrively, and weight of 1,000 seeds was 6.24 ± 0.172 ㎎. Seeds were thus classified as ‘dwarf seeds’. Regarding the dormancy type, since round-leaved sundew seeds were dormancy broken and germinated at 20~30℃ under the light condition after wet-chilling treatment for 12 weeks, seeds were estimated to have physiological dormancy. Germination conditions of dormancy broken seeds were found to be 20℃ and light condition (54.7%), but germination decreased at higher temperature. Percent germination (PG), germination energy (GE), mean germination time (MGT) and T50 were effectively improved by chemical treatment such as GA3 200 ㎎/L + kinetin 20 ㎎/L and wet-chilling treatment for 14 weeks. In conclusion these optimal conditions were thought to be a useful method for raising seedling uniformly.
Keywords
Dormancy breaking; Drosera species; Dwarf seeds; GA3; Wet-chilling treatment;
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