Seed Dormancy Type and Germination Characteristics in Four Hemerocallis Taxa Native to the Korean Peninsula
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서지정보
ㆍ발행기관 : 한국화훼학회
ㆍ수록지정보 : 화훼연구 / 31권 / 4호
ㆍ저자명 : Gun Mo Kim, Hak Cheol Kwon, Yong Ha Rhie, Chung Ho Ko, Seung Youn Lee
ㆍ저자명 : Gun Mo Kim, Hak Cheol Kwon, Yong Ha Rhie, Chung Ho Ko, Seung Youn Lee
목차
IntroductionMaterials and Methods
Plant materials
Analysis of internal and external seed morphology
Water absorption
Effect of temperature on germination
Effect of light on germination
Effect of cold stratification
Effect of GA3 treatment
Statistical analysis
Results
Internal and external seed morphology
Water absorption rate
Effect of temperature on germination
Effect of light on germination
Effect of cold stratification
Effect of GA3 on germination
Discussion
Conclusions
Acknowledgments
References
영어 초록
This study was conducted to develop a seed propagation protocol of Hemerocallis taxa native to the Korean Peninsula. In this study, the seed dormancy types were classified. The germination traits of H. thunbergii, H. dumortieri, H. hakuunensis, and H. hongdoensis were also characterized. The initial embryo to seed length ratio (E:S ratio) in seeds of the four Hemerocallis species was between 0.80 and 0.90 at harvest, however, the E:S ratio did not increase until just before germination. Thus, seeds of the four Hemerocallis species had no morphological dormancy (MD), and at least 84% of seeds of all tested species germinated at 25/15℃ under light within 30 days. The lower the incubation temperature, the lower the germination rate of seeds of the four Hemerocallis species. However, the temperature range for germination was expanded due to old stratification. Gibberellin treatment increased the germination rate or germination speed at a relatively low temperature of 15/6℃. However, this treatment did not improve the germination rate as much as the temperature at 25/15℃. Under 15/5℃ of incubation, cold stratification increased the final germination percentage and rate/speed and expanded the temperature range for germination from high to low (25/15℃ → 15/6℃). This indicates that the seeds have a conditional dormancy (CD) that germinates in a narrow temperature range. In conclusions, the four Hemerocallis seeds exhibited nondeep physiological dormancy.참고 자료
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