Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Vegetative Growth and Flowering of Salvia splendens 'Salsa' in Response to Night Interruption

야파 처리가 살비아 'Salsa'의 영양생장 및 개화에 미치는 영향

  • Hong, Yoon Yeong (Department of Plant Science, Seoul National University) ;
  • Park, Yu Jin (Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Kim, Yoon Jin (Department of Horticulture, Biotechnology and Landscape Architecture, Seoul Women's University) ;
  • Kim, Ki Sun (Department of Plant Science, Seoul National University)
  • 홍윤영 (서울대학교 식물생산과학부) ;
  • 박유진 (서울대학교 농업생명과학연구원) ;
  • 김윤진 (서울여자대학교 원예생명조경학과) ;
  • 김기선 (서울대학교 식물생산과학부)
  • Received : 2013.11.05
  • Accepted : 2014.04.02
  • Published : 2014.09.30
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Abstract

This research was conducted to examine the effects of night interruption (NI) at different times on vegetative growth and flowering in Salvia splendens 'Salsa'. Plants were grown in a growth chamber under 9-h photoperiod (short-day, SD) or 9-h photoperiod plus NI with light intensity at $3-5{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ photosynthetic photon flux. The NI was applied at 18:00-22:00 HR (NI18), 22:00-02:00 HR (NI22), or 02:00-06:00 HR (NI02). The net photosynthetic rate under NI18, NI22, and NI02 increased by 0.33, 0.16, and $0.13{\mu}mol{\cdot}CO_2{\cdot}m^{-2}{\cdot}s^{-1}$, respectively, during the NI period. Dry weight, plant height, and the number of nodes under NI were not significantly different from those of the plants under SD. However, flowering was earlier by approximately 9.8 days, and the number of flowers increased to 138.7 in NI02 compared to 36.4 flowers under SD at 17 weeks after the treatment. Our results indicate that NI02 was the most effective treatment in promoting flowering. Although vegetative growth of salvia was not increased in response to the increased net photosynthesis, flowering was promoted. Under NI18, NI22, and NI02 treatments, 77.8, 88.9, and 100.0% of salvia plants flowered within 8 weeks, whereas 44.4% of the plants flowered within the same time under SD conditions.

이 연구는 야파 처리 시간대가 살비아 'Salsa'의 영양생장 및 개화에 미치는 영향을 조사하고, 저광도 야파 처리가 광합성을 증가시킬 수 있는지 알아보고자 수행되었다. 살비아는 9시간의 단일조건 또는 9시간 일장에 $3-5{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$의 광도의 야파를 추가한 조건의 식물 생육상에서 재배되었고, 야파 처리는 18시-22시(NI18), 22시-02시(NI22), 02시-06시(NI02)의 세 구간으로 나누어 적용되었다. NI18, NI22, NI02 처리구에서 광합성은 야파 처리 시간 동안에 각각 0.33, 0.16, $0.13{\mu}mol{\cdot}CO_2{\cdot}m^{-2}{\cdot}s^{-1}$만큼 증가하였다. 하지만 엽폭, 엽장 등의 영양생장은 단일 조건하의 식물들과 유의성 있는 차이를 나타내지 못하였다. 야파 처리 시 개화까지 걸리는 시간은 9.8일 단축되었고, 17주간 야파 처리 시 꽃의 수는 단일 조건의 36.4개에 비해 NI02 처리구에서 138.7개로 증가하였다. 이러한 결과는 02시부터 06시까지의 야파 처리가 개화를 촉진하는 데에 가장 효과적이라는 것을 보여준다. 그러나 야파 처리 시간 동안에 증가한 광합성량은 살비아의 영양생장 증가에는 효과를 보이지 못하였다. 비록 야파 처리 동안의 미미한 광합성의 증가가 살비아의 영양생장을 증가시키지는 못하였지만, 개화에는 크게 영향을 미쳤다. 단일 조건에서는 44.4%만이 개화하였지만 8주간 야파 처리시 NI18, NI22, NI02 처리구에서는 각각 77.8, 88.9, 100.0% 개화하였다.

Keywords

References

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