• 한국산림과학회지
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• 제94권2호통권159호
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• pp.67-72
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• 2005

The objectives of this study were to identify the period of initiation of floral primordia in black locust (Robinia pseudoacacia L.) and subsequent development of floral buds until following spring. Four mature trees of black locust located in Suwon, Korea were selected. Bud samples were collected from the current-year shoots, starting from mid June to July every week, from August to October and from February to April every month. The buds were fixed in FAA solution, dehydrated, and imbedded in paraffin for microscopic observation. Buds collected on June 16, and 23, 1997, contained primitive primordia that might be interpreted as early floral primordia. By June 30, a bud showed a positive indication of inflorescence primordium with a well-formed shoot apex. All the inflorescence primordia observed throughout the collection periods were always associated with unique hairy appendages around the primordium and enclosed within a sclerenchymatous chamber. By July 7 and 15, a floral apex had early bud scales. By July 22, primitive inflorescence developed into visible arrangement of individual floral primordial By July 29, the inflorescence developed into whirl arrangement of individual floral primordia in a transverse section, but showed little further development until October 15. The inflorescence primordia seemed to over-winter at this stage. Buds collected from February 15 and March 24 the following year also showed no further development of inflorescence primordia. By April 7 the inflorescence started to show further development with elongated axis. At this time individual flowers were easily recognized.

• Journal of Ginseng Research
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• 제6권1호
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• pp.67-74
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• 1982

To clarify the morphological characteristics of Korean ginseng cultivated, the shapes and frequencies of Inflorescence, flowering bud, fruit, and leaf were investigated. The shapes of inflorescence, flowering bud and fruit, and leaf were divided into 6, 3, and 7 groups, respectively. The frequencies of these shapes were not significantly different according to the planting positions.

• Journal of Forest and Environmental Science
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• 제38권4호
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• pp.275-283
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• 2022

A study was designed to investigate the pattern of sexual dimorphism in a plantation of Garcinia kola. Twenty trees were randomly selected for the study and have been observed to flower regularly. A total of 100 inflorescence were randomly collected from the crown of each tree and 500 flowers randomly assessed within the period of four (4) flowering seasons. Floral sex assessment was done visually and with a hand magnifying lens; floral morphometric measurements (i.e. pedicel and perianth length and breadth), inflorescence length, and breadth) was taken using a veneer caliper; number of flowers per inflorescence and inflorescence per twig was counted; while, data analysis was conducted on excel using analysis of variance and pairwise t-test comparison. Four floral sexes were identified in the G. kola plantation studied which were unisexual male flowers, unisexual female flowers, cosexual unisexual male flowers, and cosexual hermaphrodite flowers. Three tree sexes were identified viz: inconstant male, invariant female, and cosexual trees. The plantation was significantly sexually dimorphic in floral sex and phenotypic traits (i.e. pedicel and perianth size), and as well as sexually dimorphic in tree sex and reproductive phenotypic traits (i.e. inflorescence size, number of inflorescences per twig, and number of flower bud per inflorescence). The sexual system of the plantation was therefore trioecious with features suggestive of evolving dioecy through the gynodioecious pathway.

• 한국작물학회지
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• 제34권1호
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• pp.92-97
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• 1989

2년생 인삼에서 화경출현 개체와 비화경출현 개체를 구분 선정하여 이들 개체간의 년생별 생육 및 개화특성 그리고 형질간 상관관계를 비교 조사하여 화경출현 개체의 육종소재로서 활용성을 모색하고자 시험하였던 바 결과는 다음과 같다. 1. 2년생에서 화경출현 개체는 비화경출현 개체에 비하여 경장, 엽장이 크고 장엽수가 많으 개체군에서 화경출현률이 높았다. 2. 2년생 시 화경출현 개체는 3,4년생에서도 2년생과 같은 경향으로 비화경 개체에 비하여 지상부 생육이 양호하였고 염실률, 근량도 증가되었다. 3. 착과수 및 근종과 상관이 높은 지상부 형질은 경직경, 경장, 엽장, 장엽수 등이었다. 4. 2년생 화경출현 개체의 3년생 지상부 형질 상관은 2년생 비화경 출현 개체의 4년생 지상부 형질상관과 진상을 보였다.

• Journal of Plant Biology
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• 제29권4호
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• pp.329-340
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• 1986

This study is attemped to discuss the taxonomic significances as have been raised up to now in the study of Lauraceous inflorescence. Lauraceous inflorescences are recognized as panicle, umbel, dichasium, or fascicle by various investigators. Reconsidering the inflorescence or existence of involucre, which has been accepted as important character in the present classification system, it is assumed that the study about them has not so far carried out a deliberate analysis over inflorescent morphology, nor has recognized the existence of involucre. Furthermore, all the materials examined in this study have fugacious or persistent involucres which are leafy, scaly or membraneous. Therefore, it was found that the kinds, fugacity or persistency of involucres are significant in the problems of classification of Laureaceae. Korean Lauraceous inflorescence has evolved into the direction of continuous reduction in its peduncle: from compound dichasium to capitate umbel.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.25-25
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• 2017

Inflorescence architecture mainly contributes to final grain yield in crops. Sorghum inflorescence is basically composed of one fertile sessile spikelet (SS) and two infertile pedicellate spikelets (PS). To identify regulatory factors involved in the inflorescence architecture, we screened an EMS mutagenesis population from the pedigreed sorghum mutant library. We found inflorescent architecture mutants, named as multi-seed mutants, msd, with gained fertile ability in PS and also an increased number of floral branches. In natural sorghum populations, it is not common that are fertile. A detailed dissection of developmental stages of wild type and msd1 mutant described that the PS in wild type do not have floral organs, including ovary, stigma, filament and anther, while the msd1 mutants generate intact floral organ in the sessile spikelet. We found MSD1 encoded a TCP transcription factor using bulk segregant analysis (BSA) of F2 population, and was a strongly enriched expression during inflorescence developmental stages. We proposed that MSD1 functions to suppress floral organ maintenance at PS during inflorescence development in Sorghum. To explore the regulatory network associated with PS fertility, whole genome expression profiling was performed at 4 different developmental stages in 6 various tissue types between wild type and msd1. Taken together, we demonstrated that MSD1 was involved in the plant hormone and maybe influenced program cell death in PS via the activation of plant hormonal pathway.

• 화훼연구
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• 제19권1호
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• pp.37-41
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• 2011

본 실험은 여름철에 비해 상대적으로 광도가 감소되는 시기인 8월 이후부터 익년 3월까지 차광처리가 팔레놉시스의 잎과 뿌리의 생육 그리고 화경의 발생에 미치는 영향에 대하여 조사하였다. 차광처리는 자연광의 50%, 60%, 70%, 80%, 그리고 90% 수준이었다. 야간 $CO_2$의 흡수량과 증산량, 엽내 탄수화물함량, 생체중과 건물중 모두 50%와 60% 차광에서 높았으며 70%수준 이상에서는 차광이 증가할수록 감소하였다. 화경의 길이, 개체당 화경수와 소화수는 50%와 60% 차광에서 다른 처리보다 높았으며 개화소요일수도 짧았다. 특히, 90%수준에서는 화경의 발생이 현저하게 억제될 뿐만 아니라 실험기간 동안 개화는 이루어지지 않았다.

• 한국작물학회지
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• 제43권4호
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• pp.269-272
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• 1998

Characteristics of seed and plant growth of the nine local collections of the medicinal plant, Agastache rugosa were evaluated. Seed size of the collection from Garyungsan was larger than the others. Seeds of Damyang collection were the smallest in size. Seeds of the collections were mostly oval shaped. There were no differences between brown and black seed coat color groups in seed width, ratio of seed length to seed width and 1,000 seed weight. Stem lengths of Garyungsan and Bongpyung collections were 99.9 and 95.6 cm, respectively, and were longer than Damyang and Jindo collections. Garyungsan collection had long leaf shape. Leaf size was the smallest for Damyang collection, but was the largest for Bongpyung collection. Inflorescence length of Mokpo collection (15.6 cm) was longer than the average over all collections (12.3 cm). Damyang collection was the shortest (10.1 cm) in inflorescence. Top dry weight of each collection from Soonchun, Bongpyung, Mokpo, Jindo, and Gurye was greater than the average over all collections (20.38 g/plant). Jinju and Damyang collections had less top dry matter than others. There was no difference in the growth traits examined between brown and black seed coat groups. The brown seed group was greater in leaf weight than the black seed group. However, these two groups were not different in stem and inflorescence weight. Collections of A. rugosa from Bongpyung, Soonchun, and Mokpo were promising for commercial cultivation because of their great top dry weight, especially in leaf and inflorescence.

• 한국작물학회지
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• 제39권6호
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• pp.537-541
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• 1994

식용 또는 약용으로 그 이용가치를 충분히 가지고 있는 강활의 미숙화서, 줄기, 그리고 엽병으로부터 캘러스 유도와 식물체 발생에 관하여 실험한 결과를 요약하면 다음과 같다. 1. 캘러스 유도와 증식정도는 미숙화서를 2,4-D 2mg/l 첨가배지에 치상했을 때 가장 양호하였 다. 2. 2,4-D 1mg/l와 2mg/l 첨가배지에서 미숙화서로부터 유도된 담황색의 유연한 캘러스 표면에 희고 단단한 embryogenic 캘러스가 발생하였고, 그외 배지에서는 발생하지 않았다. 3. 줄기 발생은 2,4-D 0.1mg/l와 Kinetin 1mg/l 그리고 2,4-D 0.5mg/l와 Kinetin 2mg/l를 각각 조합한 배지에서 가장 효율적이었다. 4. 캘러스 유도와 식물체 재생에 가장 적합한 재료는 미숙화서라 생각된다.

• 원예과학기술지
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• 제32권5호
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• pp.623-627
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• 2014

Curcuma alismatifolia 'Chiangmai Pink'의 화아발달 과정을 SEM을 통해 관찰하였다. 쿠르쿠마 근경에서 자란 맹아의 발육정도에 따른 화아분화 과정과 단계별 화아분화의 형태적 특성은 정식 후 식물체의 싹이 15-20cm 가량 자랐을때 생장점의 중앙부가 돔형으로 비대되는 경정분열조직에서 포엽이 분화되기 시작하였다. 포엽이 5-7매 가량 분화되면 포엽과 포엽 사이에서 화아가 형성되기 시작하였고, 보통 포엽당 화아는 4-6개가 관찰되었다. 화아가 분화되는 순서는 맨 하위 포엽 내 존재하는 것부터 상부로 올라가면서 하나씩 분화되었고 상부의 것이 분화되면 다시 하부의 4-6개의 화아 중 또 다른 화아가 상부쪽으로 향하면서 하나씩 순차적으로 되었다.