• Korean Journal of Plant Taxonomy
• /
• v.52 no.2
• /
• pp.118-122
• /
• 2022

Aruncus aethusifolius (H. Lév.) Nakai is an endemic species in Korea and is economically important as an ornamental herb. The complete chloroplast genome of A. aethusifolius is 157,217 bp long with four subregions consisting of 85,207 bp of large singlecopy and 19,222 bp of small single-copy regions separated by 26,394 bp of inverted repeat regions. The genome includes 131 genes (86 protein-coding genes, eight rRNAs, and 37 tRNAs). Phylogenetic analyses demonstrates that the chloroplast genome of A. aethusifolius was sister to A. dioicus var. kamtschaticus, forming the strongly supported clade of Aruncus. This is the first report of the chloroplast genome of A. aethusifolius.

• Korean Journal of Plant Taxonomy
• /
• v.34 no.1
• /
• pp.9-26
• /
• 2004

Texa of Lycoris in Korea were classified as five species with two varieties and revised taxonomically. Among the examined taxa, five Korean endemic plants were clarified: Lycoris flavescens M. Kim et S. Lee, L. uydoensis M. Kim, L. chejuensis Tae et S. Ko, L. chinensis var. sinuolata Tae et S. Ko, and L. sanguinea var. koreana (Nakai) T. Koyama. It was found that L. flavescens, L. uydoensis, and L. chejuensis were the natural hybrids between taxa of M+T karyotype and A karyotype. A specimen collected on Aug. 20, 1987 by M. Kim was designated as a holotype of Lycoris flavescens M. Kim et S. Lee. Lycoris flavescens var. uydoensis was ranked up to L. uydoensis. A key to all species including descriptions of each taxon was provided.

• Food Science of Animal Resources
• /
• v.30 no.2
• /
• pp.305-312
• /
• 2010

The effects of dietary supplementation with Kalopanax pictus branch, leaves, and extracts on performance, proximate composition, pH, total phenol and 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity, cholesterol and fatty acid composition of chicken meat. Broiler chicks were fed for 5 weeks with a diet containing 5% Kalopanax pictus branch (T1), 2% Kalopanax pictus leaves (T2), and 5% Kalopanax pictus extracts (60% leaves + 40% branch) (T3). T1 and T3 resulted in much better feed conversion than T2. In proximate composition, crude fat of chicken meat was increased, but not signi-ficantly (p>0.05) in Kalopanax pictus-supplemented diets than control diet. Total phenol contents and DPPH radical scavenging activity were significantly increased (p<0.05) by the dietary-supplementation with Kalopanax pictus branch and leaves compared to the control diet. Total and high density lipoprotein cholesterols of treatment groups were higher than the control group, and control group low density lipoprotein cholesterolwas higher than treatment groups (p<0.05). Especially, T3 was significantly (p<0.05) more effective in improving cholesterol compared to other treatment groups. The treatment groups (especially T3) showed significantly higher total fatty acid and unsaturated fatty acid compositions compare to the control group.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.40 no.2
• /
• pp.171-178
• /
• 2014

The purpose of this study was to analyse the volatile components of Thymus magnus Nakai extracted by different extraction methods and reproduce scent close to original plant based on the results. For this purpose, the essential oil of T. magnus was extracted by supercritical fluid extraction (SFE), water and steam distillation (WSD) and simultaneous steam distillation and extraction (SDE) methods. The compositions of the essential oil were analyzed by gas chromatography-mass spectrometry (GC-MS). Consequently, linalool (0.1%) and trans-sabinene hydrate (0.9%) contents in the essential oil extracted by SFE method of $40^{\circ}C$ - 400 bar condition were relatively higher than compositions of the essential oil extracted by different conditions. The contents of borneol (3.82%), terpinen-4-ol (0.3%) and caryophyllene oxide (2.2%) were relatively higher at $50^{\circ}C$ - 400 bar and the contents of ${\beta}$-bisabolene (5.88%), 1-octen-3-ol (0.31%), caryophyllene (2.91%), p-cymene (2.04%) and ${\gamma}$-terpinene (0.52%) were extracted relatively higher at $50^{\circ}C$ - 300 bar. The compositions of the essential oil extracted by SFE method of $50^{\circ}C$ - 200 bar condition contained relatively higher contents of thymol (77.63%) and carvacrol (5.65%). The contents of ${\alpha}$-bisabolol (0.17%), caryophyllene (6.46%), cis-${\alpha}$-bisabolene (1.52%) and ${\beta}$-bisabolene (20.65%) in the essential oil extracted by WSD method were relatively higher than compositions of the essential oil extracted by SFE method, and by SDE method we couldn't obtained essential oil. The results of this study could be utilized to reproduce scent close to original scent of T. magnus.

• Korean Journal of Plant Resources
• /
• v.29 no.2
• /
• pp.235-240
• /
• 2016

Factors affecting germination of seeds in the forms of various environment and chemical compounds. The present study was aim to produced effective seed propagation method of Astilbe koreana (Kom.) Nakai which had expected high value for the cut flower, ornamental and pharmaceutical material. Seed width and length ranged 0.62, 2.22 ㎜, respectively, and weight of thousand seeds was 40.5 ㎎. As result of imbibition test, showed moisture content of fresh seed (2.57%) increased rapidly by water-soaking treatment under 24 hours, recording to maximum value of 29.8%, and expansion of the seed coat was observed. Seed germination was the best at 15℃ and light conditions (40.8%) among temperature and light conditions treated. Percent germination of seeds was improved under the low (15, 20℃) than high temperature (25, 30℃). In addition, the seed was not germinated at dark condition regardless of temperature. Seeds of A. koreana thus seemed that it had low temperature germinability conditions. To improve germination rate, seeds were submerged in various concentrations of growth regulators such as GA₃ and kinetin, and minerals as KNO₃ and KCl. As a results, KNO₃ treatment, regardless of concentrations, promoted germination compared to control. Especially, percent of germination (77.8%), germination energy (96.1%), mean germination time (11.3 days) and T₅₀ (6.5 days) were effectively improved by treatment of KNO₃ 20 mM.

• Korean Journal of Plant Taxonomy
• /
• v.33 no.4
• /
• pp.455-472
• /
• 2003

The period from 1946 until his retirement from Department of Forest Resources, Seoul National University was a time of research and professional activity on many fronts for Korean Plant Taxonomy. From 1952 to 1984, he travelled south Korea and collected more than 70,000 specimens. Working out of this project, Dr. Lee developed the SNUA herbarium (Herbarium of The Arboretum of Seoul National University) as the best University herbarium in Korea for the modem floristic work. Dr. Lee's first interest rests on his contributions to our understanding of the twig identification in early 1950. Asian deciduous oak taxa have attracted particular focus to him late 1950 and early 1960. Accordingly Dr. Lee has been one of the specialists on systematic study of Asian oak which is a basis of identification in eastern Asia now. Dr. Lee's contributions concerning rare and endangered plants in Korea provide a tremendous information after a Japanese taxonomist, T. Nakai did in early 1920 to late 1930 in Korea. During his fourteen year career from 1970 to 1984, Dr. Lee spent time to investigate flora of many local and National Park sites. Much of his effort was directed to the voucher specimens for which he worked for the Illustrated Flora of Korea and also served as a field collector. These collections at SNUA enabled us to extend our educational outreach from the local to the national flora research. Although Dr. Lee has been and continues to be the soul of SNUA, collection records about his purpose and aim for each trip are not well documented except date and field studied sites. This lesson enables us to tackle the same issue of balancing quantity and quality with well documented specimens now.

• Korean Journal of Organic Agriculture
• /
• v.25 no.1
• /
• pp.85-99
• /
• 2017

The study was compared for ability to supply macro-nutrients between time and height of mowing to establish alternate technique of a chemical fertilizer with 9-year old 'Niitaka' pear (Pyrus pyrifolia Nakai) trees in a pesticide-free orchard in 2009. Rye and hairy vetch were sown together during fall 2008. Four types of mowing time treatments were included; mowing on April 18+May 28, on April 28+June 8, on May 8+June 18, and on April 18+May 18+June 18. Mowing height treatment included mowing at $3{\pm}1cm$, $7{\pm}1cm$, and $13{\pm}1cm$ on April 18 or June 8. Mowing on May 8+June 18 increased the most dry weight of ground cover and vegetation to 14,480 kg per ha among the mowing time treatments, resulting in the greatest production of T-N (total nitrogen; 292 kg) and K (396 kg) per ha on the soil. Mowing at $7{\pm}1cm$ decreased the most dry weight of ground cover and vegetation to 11,970 kg per ha among the mowing height treatments, resulting in the lowest production of T-N (265 kg), P (111 kg) and K (333 kg) per ha in a soil. Ground cover treatments increased soil organic matter contents, regardless of mowing treatment methods.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2019.04a
• /
• pp.87-87
• /
• 2019

현대인의 생활수준의 향상에 따른 관상식물의 관심이 증가하여, 자생초화류를 활용하기 위한 연구가 진행되고 있다. 산꼬리풀[Veronica rotunda var. subintegra (Nakai) T.Yamaz.]은 국내 특산식물로서 산지의 초원에서 자생하고, 쪽빛을 내는 화기는 청아한 느낌을 주어 관화식물로서 이용가능성이 높다. 본 연구는 산꼬리풀의 분화 재배기술을 확립하고자 2018년 7월 2일부터 10월 15일까지 수행하였다. 대조구는 플라스틱 화분 10호에 원예상토를 충진한 다음 200구에 셀당 4립 파종하여 생산된 유묘를 정식하였다. 실험은 식재용기(플라스틱 8, 10, 12호 화분, 비닐포트 3, 4치), 토양종류[원예상토 단용, 중화 피트모스:펄라이트(3:1, 4:1), 마사토:중화 피트모스(2:1, 3:1)], 묘의 소질[파종립수(1, 2, 4, 6립), 파종용기(162, 200, 288구 트레이)] 등이 생육에 미치는 영향을 분석하였다. 연구의 결과, 식재용기에 따른 생육은 플라스틱 화분 12호에서 왕성하였고, 포트의 용적량이 클수록 경직경, 측지수, 마디수, 엽수, 개화율이 유의적으로 증가하였다. 토양종류에 따른 생육은 원예상토에서 가장 왕성하였고, 측지수, 경직경, 마디수, 엽수 및 개화율이 모두 우수하여 관상용 재배에 적합하였다. 피트모스 혼용토는 생육이 억제되는 동시에 잎이 황화되는 현상이 나타났다. 마사토 혼용토의 경우, 생육이 억제되는 결과를 보였다. 셀당 파종량을 달리한 유묘를 정식하여 재배한 결과, 초장, 절간장은 파종량이 증가할수록 감소하였고, 포트당 마디수와 엽수는 증가하였으나, 1립 파종묘를 제외하고 유의적인 차이는 없었다. 개화율은 4립 파종묘(44.4%)가 1, 2, 6립 파종묘(20.8~25.0%)보다 높았다. 육묘용기별 생육은 초기생육이 우수하였던 162구 생산묘가 정식 후 재배에도 왕성한 생육을 나타내었다. 결론적으로, 산꼬리풀의 최적의 분화재배를 위해 플라스틱 화분 12호에 원예상토를 충진한 다음 162구 트레이에 포트당 엽수와 개화율이 높은 4립 파종하여 생산된 유묘를 정식하여 재배하는 것이 우수할 것으로 판단된다. 경제적 측면을 고려하여 토양은 비교적 생육이 양호하였던 마사토의 활용방안을 검토하는 것이 좋을 것으로 생각된다.

• Horticultural Science & Technology
• /
• v.33 no.4
• /
• pp.486-491
• /
• 2015

In this study, we evaluated the differences in fruit development and quality indices of fruits subjected to blossom thinning before full bloom in 'Hanareum' and 'Niitaka' pears (Pyrus pyrifolia Nakai). We carried out a thinning treatments at 5 days before full bloom, targeting the blossoms at the 1st and 2nd position (T1) or the blossoms at the 6th and 7th position (T2) from the basal part of the flower cluster in both cultivars. Blossom thinning treatments increased the average fruit weight of early-season Asian pear 'Hanareum' up to 10.5% (T1) and 11.0% (T2) at harvest time (110 days after full bloom). The mid-season 'Niitaka' pear showed increased fruit weight of up to 12.6% (T1) and 16.8% (T2) at harvest time (170 days after full bloom). Moreover, these treatments increased the production rate of bigger sized fruits in both cultivars. Removal of blooms also affected fruit quality indices; the bloom-thinned fruits showed higher soluble solids contents (about $1^{\circ}Brix$) and higher skin color redness ($a^*$) especially in 'Niitaka' pears when compared to the non-thinned controls. Overall, the treatments increased the fruit size and weight as well as fruit quality including soluble solids and skin color. Bloom thinning treatment targeting the 6th to 7th blossom from the basal part of the flower cluster may be recommended as the practical thinning method in Asian pear 'Hanareum' and 'Niitaka'.

• Korean Journal of Poultry Science
• /
• v.37 no.4
• /
• pp.323-329
• /
• 2010

The objective of this study was to investigate the effects of supplementation diets with Kalopanax pictus leaf powder on performance, proximate composition, carcass characteristics and blood characteristics of chicken meat. Broiler chicks were fed diets containing Kalopanax pictus leaves with concentration of 0% (Control), 0.5% (T1), 1.0% (T2), and 2.0% (T3) for five weeks. There were no significant differences in performance among treatment, however there were significant decrease in mortality within treatment. The crude fat of chicken meat was increased in diets by addition of Kalopanax pictus leaf powder than control, but moisture, crude protein, and crude ash were no significant differences. The abdominal fat was significantly increased by the supplementation of Kalopanax pictus leaf powder compare to the control (P<0.05). The total cholesterol, LDL-cholesterol and triglyceride of control were higher than treatment groups, and the HDL-cholesterol and glucose of control were lower than treatment groups (P<0.05). Especially, T2 and T3 were significantly (P<0.05) more effective in improving cholesterol compare to other treatment groups. In conclusion, these data indicate that supplementation of 1.0% Kalopanax pictus leaf powder (T2) were most effective in decreasing total cholesterol, LDL-cholesterol and triglyceride and increasing HDL-cholesterol.