Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
권호 표지

A Scanning Electron Microscope Observation of Flower Bud Initiation and Development of Dendrobium nobile

Dendrobium 화아분화 및 발달과정의 전자현미경적 관찰

Chae, Soo-Cheon
채수천

  • Published : 20020000
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Abstract

Anatomical observation of floral organ formation was conducted by a scanning electron microscope in Den. nobile Snowflake ‘Red Star’. The initiation of flower bud was developed into dome-like shape when air temperature reached below 10$\circ$C (around October 30). The formation of floret primordium was observed in 40 days thereafter (December 10). The differentiations of 3 sepal and 3 petal primordium and column formation were observed on December 20 and on January 30, respectively. Flowering occurred 100 days after initiation of flower bud (February 10). During the course of flower bud initiation it was observed that protrusion of growing points, which were unrelated to flower bud initiation. These growing points had no effect on flower development and flower differentiation, and developed into pseudobulb as daily average temperature increased.

Den. nobile계 Snowflake 'Red Star'의 화아형성 및 개화에 대한 해부학적 관찰에 따르면, 화아형성은 외온이 10 이하로 저하된 10월 30일경 액아가 돔상태로 비대되기 시작하였으며, 비대된 액아가 신장하여 소화원기를 형성하고, 이 소화원기가 발달하여 12월 10일경(액아가 비대된 40일 후) 소화가 형성되었다. 형성된 소화에 각각 3개씩의 꽃잎과 악편이 12월 10일경에 형성되었고, 예주는 1월 30일경에 형성되었다. 그 후 개화는 화아형성 100일째인 2월 10일경에 이루어졌다. 특히, 화아형성 과정 중 어느 단계에서나 화아와 관계없는 생장점이 관찰되었으며, 이 생장점은 소화의 발달 및 분화와 관계없이 일평균 온도가 높아지면서 영양생장하여 고아로 발달되는 것이 관찰되었다.

Keywords

References

  1. Kakibuchi, K. and Y. Fujime. 1994. A Scanning electron microscopic observation of petal initiation in cruciferous vegetables. J. Japan. Soc. Hort. Sci. 63:385-392 https://doi.org/10.2503/jjshs.63.385
  2. Kim. H.Y. 1992. Flowering control of flower. Mirinae. p. 263-302
  3. Kim, H.Y. 1996. Effect of highland cultivation on the growth and flowering of Cymbidium Melody Fair 'Marilyn Monroe' during summer. J. Kor. Soc. Hort. Sci. 37:123-126
  4. Konishi, K., Y. Imanishi, and M. Koi. 1988. Flowering control of floricultural crop (Japanese). Youkendo. Tokyo. p. 273-275
  5. Kosugi, K. 1952. Effects of soil moisture and low temperature upon the flower bud differentiation in the Dendrohiun nobile. J. Japan. Soc. Hort. Sci. 21:51-54
  6. Kosugi, K., M. Yokoi, N. Asai, and K. Matsuda. 1971. Flower bud formation in orchids. Ⅰ. On the floral initiation and development in miniature Cymbidiums. Tech. Bull. Fac. Hort. Chiba. Univ. 19:23-27
  7. Kosugi, K., M. Yokoi, and S. Maekawa. 1973. Flower bud formation in orchids. Ⅲ. Floral initiation and development in Epidendrum radicans Pav. J. Japan. Soc. Hort. Sci. 42:25-30 https://doi.org/10.2503/jjshs.42.tokubetu_25
  8. Murai, C. 1988. New culture technology in western orchids (Youran saibaino singizyuthu). Seibundo-shinkosha Co., Ltd. Tokyo. p. 42-96
  9. Nishimura, G. K. Kosugi and J. Furukawa. 1972. Flower bud formation in Orchids. Ⅱ. On the floral initiation and development in phalaenopsis. J. Japan. Soc. Hort. Sci. 41(3):297-300 https://doi.org/10.2503/jjshs.41.297
  10. Park, J.S., J.D. Chung, and H.Y. Kim. 2001. Scanning electron microscopic observation of flower bud differentiation of Cymbidium goringii in habitat of Korea. J. Kor. Soc. Hort. Sci. 42: 103-106
  11. Paek, K.Y., H.Y. Kim, J.J. Kim, S.G. Park, K.C. Son, J.H. Seo, and E.S. Park. 1995. From the beginner to expert in cultural technique of western Orchid. Farmer News Co. Seoul. p. 18-35
  12. Peng, S.A. and S. Iwahori. 1994. Morphological and Cytological changes in apical meristem during flower bud differentiation of Japanese pear, Pyrus pyrifolia Nakai. J. Japan. Soc. Hort. Sci. 63:313-321 https://doi.org/10.2503/jjshs.63.313
  13. Roter, G.J. and L.H. Macdaniels. 1951. Flower bud differentiation and development in Catteya labiata Lindl. J. Amer. Bot. 38:147-152 https://doi.org/10.2307/2437839
  14. Sano, Y., K. Kataoka, and K. Kosugi. 1961. On the flower bud differentiation and the effect of gibberellin on the forcing in Bletilla striata Reichb. J. Japan. Soc. Hort. Sci. 30:84-88