Growth and Flowering of Orostachys japonicus A. Berger as Affected by Inflorescence Pinching Time

화서제거 시기가 바위솔의 생장과 개화에 미치는 영향

  • Jeon, Seung-Ho (College of Agriculture & Life Sci., Gyeongsang Natl. Univ.) ;
  • Lee, Chang-Woo (College of Agriculture & Life Sci., Gyeongsang Natl. Univ.) ;
  • Kim, Hong-Young (College of Agriculture & Life Sci., Gyeongsang Natl. Univ.) ;
  • Shin, Sung-Cheol (College of Natural Sci., Gyeongsang Natl. Univ.) ;
  • Kang, Jin-Ho (College of Agriculture & Life Sci., Gyeongsang Natl. Univ., Research Institute of Life Sci., Gyeongsang Natl. Univ.)
  • Published : 2007.08.30

Abstract

Floret flowering of a monocarpic plant Orostachys japonicus should be controlled to change its harvest time. The study was done to clarify the effect of pinching time of inflorescence with many florets (Aug. 25, Sept. 8 and 22, Oct. 4) on its growth, morphological characters, and flowering. Night-break treatment of 2 hours at midnight were done since Aug. 25 when afterward samples were taken every 2 weeks to Nov. 4. Growth, morphological and flowering related characters were measured from each sample. Plant height, inflorescence length and number of leaves including bracts showed significant difference between the treatments because they were sharply increased until each pinching time. Stem diameter did nearly same. Leaf and bract, floret, shoot and total dry weights had similar response to the plant height, but stem and root dry ones did similar response to the stem diameter. Most florets were removed by the pinching treatments after formed ones were increased until each pinching time. Few florets were left after the treatment, meaning that night-break treatment after that could be skipped.

일임성 식물인 바위솔은 소화의 개화로 고사하는 특성을 가지고 있다. 본 연구는 추대로 형성된 화서의 소화의 개화를 억제하고자 8월 25일부터 매일 암기중단 처리를 가하면서 8월 25일부터 10월 4일까지 2주 간격 (8/25, 9/8, 9/22, 10/4) 으로 총 4회에 걸쳐 화서의 제거시기를 달리 처리하면서 처리 전후의 생장 및 형태 변화를 11월 2일까지 추적하였던 바 그 결과를 요약하면 다음과 같다. 1. 초장, 화서장 및 엽과 포엽수는 화서제거 때까지 급격히 증가하여 화서가 제거된 것과 제거되지 않은 처리간에 차이가 많았으나, 경직경은 처리간 차이가 미미하였다. 2. 9월 하순까지 처리에 의하여 제거되는 화서는 현저히 증가하였으며 잔존하는 엽과 포엽중, 소화중, 지상부중 및 전체 건물중은 초장, 화서장 및 엽과 포엽수와 유사한 반응을 보인 반면, 경중과 근중은 경직경과 유사한 반응을 보였다. 3. 소화는 화서제거 때까지 급격히 증가하였으나 화서제거로 인하여 거의 제거되었다. 화서제거 때까지 형성된 소화는 암기중단 처리로 인하여 개화되지 않았다. 4. 화서제거로 잔존하는 소화가 거의 없기 때문에 화서제거 이후에는 온도관리에 집중되어야 할 것으로 판단되었다.

Keywords

References

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