• Immune-enhancing Activity of Water Extracts for Each Part of 13 Species (Rhamnaceae) in Korea

    국내 갈매나무과 13종에 대한 부위별 물 추출물의 면역 증진 활성

    Dae Hui Jeong, Min Yeong Choi, Gwang Hun Park

    정대희, 최민영, 박광훈

    This studied the immune-enhancing activity properties of water extracts from the leaves, branches, and fruit of 13 species (Rhamnaceae) collected during the … + READ MORE
    This studied the immune-enhancing activity properties of water extracts from the leaves, branches, and fruit of 13 species (Rhamnaceae) collected during the bearing season (Berchemia berchemiifolia, B. floribunda, Hovenia dulcis, Paliurus ramosissimus, Rhamnella franguloides, Rhamnus crenata, R. davurica, R. koraiensis, R. parvifolia, R. ussuriensis, R. yoshinoi, Sageretia thea, and Ziziphus jujube). Immune-enhancing activity were studied using the nitric oxide (NO) production in RAW264.7 cells. Extracts of B. berchemiifolia, H. dulcis, R. franguloides, R. crenata, R. davurica, R. ussuriensis and S. thea showed strong immune-enhancing activity through NO production. In addition, the expression of immune enhancement-related cytokine genes (NOS, COX-2, IL-1β, IL-6 and TNF-α) were confirmed through PCR-electrophoresis. The results of this study suggest that Rhamnaceae extracts can be used as natural antioxidants and immune enhancer. - COLLAPSE
    1 February 2024
  • Isolation and Identification of Adventitious Root Formation Inducing Substances from Cortex of cinnamomum cassia J.Presl

    육계(Cortex of Cinnamomum cassia J.Presl) 추출물로부터 부정근 형성 유도물질 분리 및 동정

    Joo Ho Yeo, Jeong Kyu Baek, Jee Sung Park, Kun Woo Kim

    여주호, 백정규, 박지성, 김건우

    In this study, as a result of exploring the physiological activity of plants useful for agriculture on various plant resources, it was … + READ MORE
    In this study, as a result of exploring the physiological activity of plants useful for agriculture on various plant resources, it was possible to confirm an activity similar to auxin that promotes plant rooting in methanol extract of Cinnamon Bark (cortex of Cinnamomum cassia J.Presl). After separating the active body by applying column chromatography and HPLC to the CHCl3 active fraction obtained by solvent extraction for each polarity from the methanol extract of cinnamon bark, cinnamyl alcohol was identified through GC/MS analysis. By bioassay using cinnamyl alcohol standard and the active fraction separated and purified from the methanol extract of cinnamon bark, the rooting rate of mung bean seedlings of the cinnamyl alcohol standard was 290% compared with the untreated control at 134.2 ㎍/mL concentration, and the adventitious root formation activity similar to the rooting rate (268.6%; 100 ㎍/mL) of the active fraction was shown. In conclusion, it is believed that cinnamyl alcohol contained in methanol extract of Cinnamon Bark is the main compound that induces adventitious root formation in mung bean. - COLLAPSE
    1 February 2024
  • Two New Records of Alien Species Including New Section of Sagina L. (Caryophyllaceae) Recorded from the Republic of Korea

    개미자리속 Saginella절 식물의 새로운 미기록종 보고: 선개미자리, 민개미자리(석죽과)

    Se Ryeong Lee, Beom Kyun Park, Kang-Hyup Lee, Dong Chan Son

    이세령, 박범균, 이강협, 손동찬

    Recently, in several regions of Korea, we discovered the occurrence of Sagina micropetala Rauschert and S. procumbens L. All the plants of … + READ MORE
    Recently, in several regions of Korea, we discovered the occurrence of Sagina micropetala Rauschert and S. procumbens L. All the plants of the genus Sagina growing in Korea are 5-merous and belong to the sect. Spergella. However, the two taxa we discovered belong to the sect. Saginella and are 4-merous. In addition, morphological characteristics such as sepals during the fruiting season and seeds were significantly different from those of species of the genus Sagina that occur in Korea. To clearly identify these species, we compared and observed their primary morphological characteristics using illustrated books and literature. Morphologically, S. micropetala exhibits the following traits: pubescence along the leaf margin, horizontally spreading sepals with red margins, and convex protrusions on the seed surface. In contrast, S. procumbens can be distinguished by its pedicels, which are curved during the flowering season and erect during the fruiting season. This plant also has broadly ovate sepals with white or yellowish-green margins, and flat seed surface protrusions. In terms of molecular analyses, 19 samples of Sagina were divided into two clades (S. micropetala and S. procumbens), confirming the taxonomic identity of the Sagina spp. - COLLAPSE
    1 February 2024
  • A Flora of Vascular Plants in Boraebong

    보래봉 일대의 관속식물상

    Ji Eun Kim, Young-Soo Kim, Jung Sim Lee, Ju Eun Jang, Hyeon Jin Jeong, Aleksey L. Kim, Sang-Kuk Han, Hee-Young Gil

    김지은, 김영수, 이정심, 장주은, 정현진, 김알렉세이, 한상국, 길희영

    Floristic study can help to understand the current status of species diversity, evaluate and predict distribution changes of plants based on the … + READ MORE
    Floristic study can help to understand the current status of species diversity, evaluate and predict distribution changes of plants based on the specimens, and record the climate environment and biodiversity of the Korean Peninsula. Boraebong is an area that has plant resources of conservation value, but there is concern about artificial interference through trail and forest road. Therefore, this study aims to report the vascular plants of Boraebong based on voucher specimens and photos and to use them as baseline data to conserve biodiversity of Boraebong. Also, it will be useful to prevent additional influx of invasive species through comparison with previous studies. The investigation was carried out 11 times from April to September in 2022 and confirmed a total of 455 taxa including 87 families, 269 genera, 401 species, 13 subspecies, 35 varieties, 6 forms. In addition, we confirmed the 4 taxa of red list plants (EN 2 taxa, NT 2 taxa), 18 taxa of Korean endemic plants, and 102 taxa of floristic target species (V degree 1 taxon, IV degree 16 taxa, III degree 31 taxa, II degree 31 taxa, I degree 23 taxa). Furthermore, alien plants 17 taxa, invasive species 2 taxa, useful plants 439 taxa were confirmed in Boraebong. As the results of comparison with previous studies, 98 total taxa including 38 families, 76 genera, 86 species, 1 subspecies, 8 varieties, 3 forms were newly identified in this study. - COLLAPSE
    1 February 2024
  • Comparison of Flower Thinning Efficiency of Lime-sulfur on Korean Major Pear (Pyrus pyrifolia Nakai) Cultivars

    석회유황합제 처리에 의한 국내 주요 배 품종별 적화 반응 비교

    Byeong Hyeon Yun, Ji Hae Jun, Il-Sheob Shin, Hyun Ran Kim, Kang Hee Cho, Jae Hoon Jeong, Se Hee Kim, Sang-Yun Cho, Sewon Oh

    윤병현, 전지혜, 신일섭, 김현란, 조강희, 정재훈, 김세희, 조상윤, 오세원

    Fruit thinning rate and characteristics were investigated for three years on seven promising pear (Pyrus pyrifolia Nakai) cultivars, which were treated … + READ MORE
    Fruit thinning rate and characteristics were investigated for three years on seven promising pear (Pyrus pyrifolia Nakai) cultivars, which were treated by lime-sulfur as an eco-chemical thinning substance. Lime-sulfur was treated twice at the second and third days after full bloom by cultivar. Most of pear cultivars were significantly thinned by lime-sulfur compounds. Especially ‘Whangkeumbae’, ‘Supergold’ and ‘Hanareum’ exhibited high flower thinning rates, 41.5%, 40.1% and 39.9%, respectively. As weather conditions at the lime-sulfur treatment, insolation and cloud amount were correlated with flower thinning rate but not significant (r = 0.49 and r = -0.45, respectively). These results suggest that lime-sulfur is suitable for reducing labor force for flower thinning of Korean pears but flower thinning effects of lime-sulfur can vary depending on other factors such as environmental conditions. This information will provide useful data for low labor force cultivation of Korean pear cultivars. - COLLAPSE
    1 February 2024
  • Selection of Soybean (Glycine max (L.) Merrill) Cultivars Suitable for Cultivation in the Paddy Fields of the Southern Korea

    남부지역의 논 토양에 적합한 콩(Glycine max (L.) Merrill) 품종의 선발

    Seo Young Oh, Jisu Choi, Seong Hwan Oh

    오서영, 최지수, 오성환

    This study was in order to select soybean (Glycine max (L.) Merrill) cultivars that are suitable for cultivating in paddy fields … + READ MORE
    This study was in order to select soybean (Glycine max (L.) Merrill) cultivars that are suitable for cultivating in paddy fields of the southern Korea and beneficial for mechanized harvesting with combine harvesters. Five soybean cultivars were cultivated in paddy fields to survey growth characteristics and seed yield, and evaluate the nutritional value of seed. Plant height was longer than 55 cm for ‘Cheongja-3ho’, ‘Daewon’ and ‘Seonpung’. First pod height was higher than 12 cm for ‘Daewon’, ‘Seonpung’, and ‘Seonyu-2ho’. Seed yields were 280 kg/10a or more for ‘Daechan’, ‘Seonpung’ and ‘Daewon’. The protein content of ‘Daechan’ were 40.7%, which was significantly higher than those of the other cultivars, and isoflavone content was higher than 200 ㎍․g-1 for ‘Seonpung’, ‘Cheongja-3ho’, ‘Daechan’, and ‘Daewon’. These results suggest that ‘Daechan’, ‘Seonpung’, ‘Daewon’ could be suitable for cultivating in paddy fields, and ‘Daewon’ and ‘Seonpung’ could be more beneficial for mechanized harvesting with combine harvesters. Furthermore, ‘Daechan’ and ‘Seonpung’ have not only high seed yields, but also high protein and isoflavone contents, suggesting that they could be used for production of various food products. - COLLAPSE
    1 February 2024
  • Effect of Alternating Temperature Conditions, and GA3 Treatment on Seed Germination of Trollius macropetalus (Regel) F.Schmidt

    변온 조건 및 GA3 처리가 큰금매화의 종자 발아에 미치는 영향

    Dong-Hak Kim, Seungju Jo, Jung-Won Sung, Jung-Won Yoon

    김동학, 조승주, 성정원, 윤정원

    This study was conducted to determine the conditions for breaking dormancy in the seeds of the North Korean plant resource, Trollius macropetalus … + READ MORE
    This study was conducted to determine the conditions for breaking dormancy in the seeds of the North Korean plant resource, Trollius macropetalus, and to investigate its germination characteristics. The morphological characteristics and viability of T. macropetalus seeds were examined. Germination characteristics were investigated based on temperature conditions (15/6℃ & 25/15℃), cold stratification treatment, and GA3 treatment. The results showed that cold stratification treatment had no effect on breaking the dormancy of T. macropetalus. GA3 treatment significantly increased the germination rate of T. macropetalus and also improved the mean germination days and germination speed. However, compared to the 15/6℃ condition, the effectiveness of GA3 treatment for T. macropetalus decreased under the 25/15℃ condition. It was determined that T. macropetalus have a nondeep-type morpho-physiological dormancy. The most effective conditions for breaking dormancy were found to be the 15/6℃ temperature condition and GA3 treatment at 500 ㎎·L-1. The findings of this study are expected to provide valuable information for the mass propagation of T. macropetalus, which has potential applications in landscaping and pharmaceutical materials. - COLLAPSE
    1 February 2024
  • Breeding of New Ever-bearing Strawberry ‘Miha’ with High Hardness

    고경도 사계성 딸기 ‘미하’ 육성

    Jong Nam Lee, Jong Taek Suh, Su Jeong Kim, Hwang Bae Shon, Ki Deog Kim, Hye Jin Kim, Mi Ja Choi, Yul Ho Kim, Su Young Hong

    이종남, 서종택, 김수정, 손황배, 김기덕, 김혜진, 최미자, 김율호, 홍수영

    ‘Miha’ is a new strawberry (Fragaria x ananassa Duch.) cultivar, which was released by the Highland Agriculture Research Institute in 2019. … + READ MORE
    ‘Miha’ is a new strawberry (Fragaria x ananassa Duch.) cultivar, which was released by the Highland Agriculture Research Institute in 2019. The ‘Miha’ cultivar originates from a 2014 cross between ‘Monterey’ and ‘Saebong No. 3’, both of which exhibited excellent ever-bearing characteristics, including continuous flowering and large fruits under long-day and high temperature conditions. This new cultivar was initially named ‘Saebong No. 12’ after examining its characteristics and productivity during summer cultivation between 2015 and 2019. After regional adaptability tests, ‘Miha’ was selected from ‘Saebong No. 12’ as an elite cultivar. The general characteristics of ‘Miha’ include intermediate, elliptic leaves, and strong growth. The fruits are conical and of a dark-red color. The number of leaves of ‘Miha’ was 21.9, which was 6.2 fewer than that of the control cultivar, ‘Goha’ with 28.1. The number of flower clusters of ‘Miha’ was similar to that of ‘Goha’. The average fruit weight of ‘Miha’ was 13.4 g, which was 4.3 g heavier than that of ‘Goha’. The fruit hardness of ‘Miha’ was 36.2 g·㎜-2, which was 10.1 g·㎜-2 harder than that of ‘Goha’. The marketable yield of ‘Miha’ was 37,393 kg·ha-1, 156% more than that of ‘Goha’ with 23,970 kg·ha-1. Therefore, the new cultivar of ever-bearing strawberry ‘Miha’ is expected to be very popular in the export or bakery market because it is hard. - COLLAPSE
    1 February 2024
  • Cold Hardiness Evaluation of Grapevine Buds by Low Temperature Exotherms among Several Grape Cultivars

    눈 조직의 저온열방출방법을 통한 포도 품종의 내한성 분석

    Su Jin Kim, Duk Jun Yu, Sung Hoon Jun, Dong Jun Im, Youn Young Hur, Dong Hoon Lee, Seo Jun Park, Hee Jae Lee

    김수진, 유덕준, 전성훈, 허윤영, 임동준, 이동훈, 박서준, 이희재

    As a result of low temperature exotherm (LTE) measurement targeting the buds of 13 grape cultivars that are recently cultivated or introduced … + READ MORE
    As a result of low temperature exotherm (LTE) measurement targeting the buds of 13 grape cultivars that are recently cultivated or introduced in Korea, ‘Shooting Star’, ‘Muscat Bailey A’, ‘IFG-6’, ‘Vanessa Seedless’, ‘Summer Crispy’, ‘Shine Muscat’, ‘Jelly Pop’, ‘Campbell Early’, ‘Ruby Seedless’, ‘My Heart’, ‘Kyoho’, ‘Thompson Seedless’, and ‘Violet King’ in order of being resistant to low temperatures. The LTE value was the lowest at -18.9℃ in ‘Shooting Star’ and the highest at -12.5℃ in ‘Violet King’. Through these results, it can be used as basic data to determine whether or not cultivation by region is possible efficiently by comparing data based on ‘Campbell Early’ and ‘Kyoho’, which are presented as standard varieties for domestic cultivation. - COLLAPSE
    1 February 2024