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Seed Dormancy and Germination in Iris laevigata (Iridaceae), A Rare Species in Korea KCI 등재

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화훼연구 (Flower Research Journal)
한국화훼학회 (Korean Society for Floricultural Science)
초록

Iris laevigata, which belongs to the Iridaceae, is now designated as an “endangered” (EN) grade by Korea Forest Service because it does not have many natural sites known for its reckless development and damage to its natural habitats. This study was carried out to establish the propagation protocol from seed to restore the native habitat of the I. laevigata and to utilize it for ornamental purposes. Basically, the appearance and internal structure of seeds were observed and imbibition experiments were conducted. Germination rate was measured by cold stratification experiment, after warm followed by cold stratification experiment, and GA3 treatment experiment. The seeds had underdeveloped embryos, which had grown to about 25% of those of fully matured seed before germination. In the controlled laboratory experiment, after cold stratification at 5°C for 0, 4, 8, or 12 weeks, the seeds germinated to 0, 11.7, 43.4, or 51.7%, respectively, after 4 weeks of incubation at 25°C. After warm stratification (25°C, 8 weeks) followed by cold stratification for 0, 4, 8, or 12 weeks, the seeds germinated to 0, 51.7, 85.0, or 88.3%, respectively, after 4 weeks of incubation at 25°C. GA3 treatment did not overcome the dormancy. Our study determined the dormancy type of I. laevigata seed. Imbibition experiments showed that there was no physical dormancy, and it was also found that there was an underdeveloped embryo when it was observed that the embryo was growing according to the period of incubation. A nd t he e m bryo grew a t relatively w arm temperatures. It is concluded that the seeds of I. laevigata have morphophysiological dormancy (deep simple MPD). This is the first report to determine the dormancy type in seeds of this valuable ornamental plant.

목차
Abstract
서 언
재료 및 방법
    실험재료
    수분흡수 실험
    종자의 소독과 배양
    고온층적처리와 저온층적처리
    GA3 처리에 의한 효과
    통계분석
결과 및 고찰
초 록
사 사
References
저자
  • Chung Ho Ko(국립수목원 식물자원연구과) | 고충호
  • Seung Youn Lee(국립안동대학교 대학원 원예육종학과, 국립안동대학교 원예・생약융합학부) | 이승연
  • Sang Im Oh(국립수목원 식물자원연구과) | 오상임
  • Eun Hye Park(국립수목원 식물자원연구과) | 박은혜
  • Min Gil(국립수목원 식물자원연구과) | 길민
  • Soo Hoon Kim(국립수목원 식물자원연구과) | 김수훈
  • Mi Jeong Yoon(국립수목원 식물자원연구과) | 윤미정 Corresponding author