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2021 Vol.39, Issue 2 Preview Page

Research Article

Growth and Flowering by Relighting and Daminozide Treatment in the Flower Bud Formation Stage of Chrysanthemum morifolium ‘Baekma’ Cut Flowers

절화 국화 ‘백마’의 화아형성기 재전조 및 daminozide 처리에 따른 생장과 개화

Yong Seung Roh1
,
Yong Kweon Yoo12*
노 용승1
,
유 용권12*
1The Institute of Natural Resource Development, Mokpo National University, Muan 58554, Korea
2Department of Horticultural Science, Mokpo National University, Muan 58554, Korea
1목포대학교 자연자원개발연구소
2목포대학교 원예과학과
*Corresponding Author
30 April 2021. pp. 204-212
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Abstract

This study was conducted to examine the effects of relighting and daminozide treatment on growth and flowering characteristics, length of cut flowers, upper leaf size, and peduncle length in the flower bud formation stage of Chrysanthemum morifolium ‘Baekma’. Relighting for 4-8 hr at 10 days after transition to short-day conditions increased the length of cut flowers, number of leaves, flower diameter, and fresh weight of flowers compared to the control. The upper leaf area was biggest after relighting for 8 hr than in the other treatments. However, relighting for 4-8 hr was not effective for increasing the number of ray florets and delayed flowering by 6-8 days. The two daminozide treatments at 18 (stage I) and 28 (stage II) days after transition to short-day conditions shortened the length of cut flowers, but number of leaves and fresh weight of cut flowers increased in all other daminozide treatments. The peduncle length was longest in the control and was 2.6-3.2 cm in one treatment with 800 mg·L-1 daminozide and two treatments with 400 and 800 mg·L-1 daminozide regardless of stage. The upper leaf area was the smallest in control and biggest in one treatment with 800 mg·L-1 daminozide at stage I and two treatments with 400 mg·L-1 at stage I and 800 mg·L-1 daminozide at stage II. The flower diameter and fresh weight were greater in daminozide treatments than in the control. The number of ray florets increased by 9-11% in one treatment with 800 mg·L-1 at stage I or 400 mg·L-1 daminozide at stage II but decreased in two treatments of daminozide. The days to flowering were delayed by 2-6 days in daminozide treatments than in control. Therefore, it is suggested that relighting for 8 hr at 10 days and treatment of 800 mg·L-1 daminozide at 18 days after transition to short-day conditions are effective in improving the quality of cut flowers by shortening the peduncle length and increasing the growth of the upper leaf area, the length of cut flowers, and the flower diameter.

Keywords
days to flowering
peduncle length
ray florets
short-day condition
upper leaf size

본 연구는 절화 국화 ‘백마’의 화아형성기에 재전조와 daminozide 처리에 따른 절화장, 상위엽 크기, 꽃목 길이 등 절화의 생장과 개화특성에 미치는 영향을 알아보기 위해 수행하였다. 단일 조건으로 전환한 후 화아형성기인 10일째에 4–8시간 재전조는 절화장, 엽수, 화폭, 꽃 생체중 등을 증가시켰다. 상위 엽면적은 8시간 재전조 처리에서 가장 넓었다. 그러나 4–8시간 재전조 처리는 설상화 수의 증가에 효과가 없었으며, 개화를 6–8일 지연시켰다. 단일 조건으로 전환한 후 18일(stage I)과 28일(stage II)에 daminozide 2회 처리는 무처리구보다 절화장이 짧았으며, 엽수와 절화의 생체중은 daminozide 처리구에서 무처리구보다 증가하였다. 꽃목 길이는 무처리구에서 5.8cm로 가장 길었고, stage에 관계없이 800mg·L-1 daminozide의 1회 처리 및 400와 800mg·L-1 2회 처리에서 2.6–3.2cm로 짧았다. 상위 엽면적은 무처리구에서 가장 작았으며, stage I에서 800mg·L-1와 stage I 400mg·L-1 + stage II 800mg·L-1 2회 처리에서 가장 넓었다. 화폭과 꽃의 생체중은 daminozide 처리가 무처리보다 더 컸으며, 설상화수는 stage I에서 800mg·L-1와 stage II에서 400mg·L-1 처리에서 무처리보다 9–11% 더 증가하였고, 2회 처리에서는 설상화수가 감소하는 경향을 보여주었다. 개화일은 무처리보다 daminozide 처리구에서 2–6일 지연되었다. 따라서 절화 국화 ‘백마’ 재배시 단일조건으로 전환하여 10일 후부터 8시간 재전조와 18일 후에 daminozide 800mg·L-1 처리는 꽃목 길이를 단축시키고, 절화장, 화폭, 상위엽을 크게하여 절화의 품질을 향상시키는데 효과적일 것으로 판단되었다.

키워드
개화소요일 수
꽃목 길이
설상화
단일조건
상위엽 크기
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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :원예과학기술지
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 39
  • No :2
  • Pages :204-212
  • Received Date : 2020-10-21
  • Revised Date : 2020-11-04
  • Accepted Date : 2020-11-19
  • DOI :https://doi.org/10.7235/HORT.20210018
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