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절화 장미 블라인드와 수곡의 형태적 특성과 발생요인에 관한 연구

Studies on Morphological Characteristics and Causal Factors of Blind Shoot and Crooked Neck in Greenhouse Cut Roses,

안동춘 (An, Dong Choon, 경상대학교 대학원)

원문보기

  • 주제(키워드) 장미 , 블라인드 , 수곡
  • 발행기관 경상대학교 대학원
  • 지도교수 정병룡
  • 발행년도 2006
  • 학위수여년월 2006. 2
  • 학위명 박사
  • 소속대학원 및 학과 대학원 응용생명과학부
  • 전공 원예학전공
  • 원문페이지 119 p.
  • 본문언어 한국어
초록/요약moremore
Blind shoots and crooked necks in roses decrease cut flower quality and cause loss of invested labor and assimilation products of the plant. Several experiments were conducted from 2002 to 2005 to find out ways to prevent occurrence of these detrimental disorders and to produce high quality cut rose...
Blind shoots and crooked necks in roses decrease cut flower quality and cause loss of invested labor and assimilation products of the plant. Several experiments were conducted from 2002 to 2005 to find out ways to prevent occurrence of these detrimental disorders and to produce high quality cut roses. Firstly, occurrence of blind shoots and crooked necks in the greenhouses in Gyeongnam province was investigated. Secondly, developmental progress of the flower bud was observed to establish developmental stages, since occurrence of blind shoots and crooked necks seemed to be affected by several environmental factors encountered during flower bud development. Finally, morphological characteristics and causal factors of blind shoots and crooked necks were investigated. 1. Occurrence of blind shoots and crooked necks Temperature and light intensity in the greenhouse varied as affected by the covering material, greenhouse orientation, and location in the greenhouse. Generally frequency of blind shoots increased under the condition of low temperature and low light intensity, while that of crooked necks increased under the opposite condition: Blind shoots increased in the winter season, while crooked necks increased in the summer season. Blind shoots and crooked necks were more frequently found in sweet heart roses, ?eSacha?f and ?eFrisco?f, which have characteristics of high yield and a short flowering time. Blind shoots also found more in hybrid tea rose ?eGrand Gala?f. Growers with higher EC levels and higher concentrations of NO3, Ca, Mg and S in the nutrient solution had lower frequency of blind shoots and crooked necks as compared to their counterparts. Although not to be direct causes of, leaf contents of nutrient elements were also higher in low occurrence situations of blind shoots and crooked necks. 2. Establishment of developmental stages of the flower bud The initiation and development of the flower bud has been divided into a sequential five stages, and the external phenotypic growth increments correspondent to each of these developmental stages were observed. Differentiation stage 0 is a vegetative stage, stage 1 is an early initiation stage of sepal, stage 2 is a middle stage of petal initiation, stage 3 is an early stage of stamen and pistil initiation, and stage 4 is completion stage of stamen and pistil development. 3. Morphological characteristics and causal factors of blind shoots Over 80% of rooted cuttings of ?eBaroque?f and ?eBallet?f grown under a condition of low temperature (12??) and low light intensity (2,000lux) became blind. When this condition was given to plants at developmental stage 2, blind shoots occurred in 58 and 60% of ?eBaroque?f and ?eBallet?f, respectively. When diameter of the propagational stem of one year-old ?eBaroque?f and ?eBallet?f plants was smaller than 4mm, more blind shoots occurred (53.5 and 65.2%, respectively) than in the thicker stems. Shoots developing on stems harvested at low height never produced blind shoots, while frequency of blind shoots increased as the height of the harvest on the stem increased. When solution strength was EC 0.5dS․m-1, blind shoots occurred in 60 and 70% of ?eBaroque?f and ?eBallet?f, respectively, while no blind shoots were produced with EC greater than 1.5dS․m-1. Foliar spray of 100mg․L-1 GA3 from stage 0 at two times over two weeks under a condition of low temperature (12??) and low light intensity (2,000lux) decreased blind shoots to 30% in ?eBaroque?f as compared to 80% in the control. When 4,000mg․L-1 CCC or 100mg․L-1 ethephon were applied in a similar way as GA3, occurrence of blind shoots decreased 15% by CCC and increased by ethephon. These effects of plant growth regulators on blind shoot occurrence was similar in ?eBallet?f. Applications of 100mg․L-1 GA3 and 4,000mg․L-1 CCC also shortened days to flowering by 3 to 4 days, while application of 100mg․L-1 ethephon had no such effect. 4. Morphological characteristics and causal factors of crooked necks Crooked necked shoots have greater growth rates than normal flowering shoots, and all crooked necks bended toward adherent uppermost leaf. Degree of curvature off the vertical stem axis increased as the uppermost leaf was attached closer to the flower bud. No axillary bud was found in the axil of the uppermost leaf in the crooked necked shoots. Well developed internal tissue of the neck with a constant thickness between the epidermis and the vascular bundle was found in the normal flowering shoots. However, thickness between the epidermis and the vascular bundle was greater on the crooked side than the opposite side in the crooked necked shoots. Cross sectional anatomy and a developmental level of the vascular bundle of the petiole of the uppermost leaf of crooked necked shoots seem to be intermediate between those of the uppermost leaf and sepals of the normal flowering shoots. Crooked necks occurred in over 20% of one-year old ?eSacha?f and ?eFrisco?f plants under the inducive condition of high temperature (30??) and high light intensity (15,000lux). The greatest 19 and 20%, respectively, of ?eSacha?f and ?eFrisco?f plants produced crooked necks when this inducive condition was given only at most sensitive stage 1. In hydroponic cultures of one year-old ?eSacha?f and ?eFrisco?f at a root zone water potential of -20kPa, crooked necks occurred in 15.3 and 17.0% of plants, respectively. 18.3 and 21.0%, respectively, of ?eSacha?f and ?eFrisco?f had crooked necks when solution provided had EC of 0.5dS․m-1, as compared to 0% at solution EC over 1.5dS․m-1. Two applications of 100mg․L-1 GA3 over two weeks at stage 0 during the summer season increased crooked necks in ?eSacha?f and ?eFrisco?f by 2.5 and 4.0%, respectively, over 8.5% in the control. Application of 5,000mg․L-1 B-9 was not effective. When 100mg․L-1 GA3 was sprayed at different stages of flower bud development in ?eSacha?f, frequency of crooked necks was not affected at stages 3 or 4, and was the greatest 19.0% at stage 1.
목차moremore
Ⅰ. 서언 6
Ⅱ. 연구사 7
1. 화아분화와 발육 7
...
Ⅰ. 서언 6
Ⅱ. 연구사 7
1. 화아분화와 발육 7
2. 블라인드 9
3. 首曲 12
Ⅲ. 재료 및 방법 16
1. 블라인드와 首曲의 발생현황 조사 16
2. 화아분화과정의 관찰과 분화단계 설정 17
3. 블라인드의 형태적 특성과 발생요인 17
4. 首曲의 형태적 특성과 발생요인 20
5. 조사 및 분석방법 25
Ⅳ. 결과 및 고찰 27
1. 블라인드와 首曲의 발생현황 27
2. 화아분화과정의 관찰과 분화단계 설정 41
3. 블라인드의 형태적 특성과 발생요인 48
1) 생육특성 48
2) 형태적 특성 52
3) 발생요인 53
(1) 광과 온도 53
(2) 모지의 굵기와 채화높이 58
(3) 배양액 강도 62
(4) 생장조절물질 63
4. 首曲의 형태적 특성과 발생요인 66
1) 생육특성 66
2) 형태적 특성 69
3) 발생요인 77
(1) 광과 온도 77
(2) 수분 스트레스 81
(3) 배양액 강도 84
(4) 생장조절물질 86
Ⅴ. 종합고찰 89
Ⅵ. 적요 94
Ⅶ. 인용문헌 98