[논문]Seed Germination and Dormancy Breaking of Thalictrum rochebrunianum var. grandisepalum (H. Lev.) Nakai

Cho, Ju Sung; Kwon, Hyuk Joon; Lee, Cheol Hee

doi:10.7732/kjpr.2016.29.3.339

Seed Germination and Dormancy Breaking of Thalictrum rochebrunianum var. grandisepalum (H. Lev.) Nakai 원문보기

韓國資源植物學會誌 = Korean journal of plant resources, v.29 no.3, 2016년, pp.339 - 346

Cho, Ju Sung (Department of Horticultural Science, Chungbuk National University) , Kwon, Hyuk Joon (Biological and Genetic Resources Utilization Division, National Institute of Biological Resources) , Lee, Cheol Hee (Department of Horticultural Science, Chungbuk National University)

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This study was carried out to develop an effective seed propagation method for Thalictrum rochebrunianum var. grandisepalum (H. Lev.) Nakai by analyzing seed dormancy types and germination characteristics. Seeds were collected between September to October at Gangwon province, and well-selected seeds were used while being dry-stored at 4±1℃. The seed size ranged 4.52 × 1.58 ㎜ and the weight of thousand seeds were 1,603.5 ± 0.02 ㎎. The moisture content was 7.2%. Seeds were achene type, and morphology characters showed an elliptical shape and rough texture, and light brown in color. Moist-chilling treatment was conducted for dormancy breaking because the seeds had an undeveloped embryo of liner type. The embryo had developed during a moist-chilling period, constantly, and fully developed in 10 weeks. Consequently, it seemed to be non-deep complex or intermediate complex type of morphophysiological dormancy, and embryo dormancy was broken by wet-chilling for 10 weeks. After 10 weeks of wet-chilling treatment, seed germination began. Germination percentage was higher in dark condition raher than light condition and recorded the maximum at 25℃ in the dark (16.3%). A pre-soaking treatment with a combined plant growth hormones promoted germination and shortened T50. Specifically, seed germination of 84.5% was achieved by pre-soaking of seeds with a combined solution of 500 ㎎/L GA3 and 10 ㎎/L kinetin for 24 h after a wet-chilling treatment for 10 weeks. Thus the effect of plant growth hormones coupled with chilling temperature on seed breaking dormancy provide asubsequent growth of seedlings for successful plantation.

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문제 정의

grandisepalum has much ornamental value while holding a significant promise in natural antineoplastic, hypotensive and antiseptic research. This research was performed to find and analyze dormancy patterns of seeds and its germination. In addition, discovery of ideal germination conditions and improvement of germination productivity were attempted to make an efficient propagation method.

제안 방법

The seeds were then weighed every two weeks then moisture absorption rate was calculated by the accumulative MC. Ten seeds were taken randomly then cross section was analyzed to observe vis-a-vis development of the embryo.
paper method). The petri dishes were placed in the germinator at different temperatures - 15, 20, 25, and 30℃ - with light (continuous light of 23±0.5 µmol·m ·s ) or dark condition, then analyzed.

데이터처리

wMean separation within columns by Duncan's multiple range test, p<0.05.

성능/효과

The seeds were examined every day, and those of which's embryo had broken through the seed coat were deemed germinated, germination energy (GE, %, germination percentage at 7 days after sowing), percent germination (PG, %, number of germinated seeds / number of total seeds) x 100), and T₅₀ (days, number of days until 50% of percent germination), was calculated.

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상세보기
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Seed Germination and Dormancy Breaking of Thalictrum rochebrunianum var. grandisepalum (H. Lev.) Nakai 원문보기

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Seed Germination and Dormancy Breaking of Thalictrum rochebrunianum var. grandisepalum (H. Lev.) Nakai 원문보기

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