BACKGROUND/OBJECTIVES: Benign prostatic hyperplasia (BPH) is the most common prostate disease and one of the most common chronic diseases caused by aging in men. On the other hand, there has been no research on BPH using Abeliophyllum distichum Nakai (A. distichum). Therefore, this study investigated the effects of A. distichum on BPH. MATERIALS/METHODS: A. distichum leaves were extracted with distilled water, 70% ethanol, and 95% hexane as solvents. Subsequently, the inhibitory effects of each A. distichum extract on androgen receptor (AR) signaling were evaluated in vitro. The testosterone-induced BPH model was then used to confirm the efficacy of A. distichum leaves in 70% ethanol extract (ADLE). RESULTS: ADLE had the strongest inhibitory effect on AR signaling. A comparison of the activity of ADLE by harvest time showed that the leaves of A. distichum harvested in autumn had a superior inhibitory effect on AR signaling to those harvested at other times. In the BPH rat model, the administration of ADLE reduced the prostate size and prostate epithelial cell thickness significantly and inhibited AR signaling. Subsequently, the administration of ADLE also reduced the expression of growth factors, thereby inactivating the PI3K/AKT pathway. CONCLUSIONS: An analysis of the efficacy of ADLE to relieve BPH showed that the ethanol extract grown in autumn exhibited the highest inhibitory ability of the androgen-signaling related factors in vitro. ADLE also inhibited the expression of growth factors by inhibiting the expression of the androgen-signaling related factors in vivo. Overall, ADLE is proposed as a functional food that is effective in preventing BPH.
This study was carried out focused an ecological characteristics and habitat management of Abeliophyllum distichum subpopulations in the Byeonsanbando National Park, Korea. Among three subpopulations of the target species in the studied area, Gamaso region are known as translocation site due to the dam construction while the wild populations which is located at both the lower terrain of the Buandaem bank and Chongnim-ni, which is designated as Natural Monument No 370, is threat due to an intensive site management likes clearance of scrub amongst the Abeliophyllum plants. Vascular plant taxa in the studied sites were summarized as 182 taxa; 65 families, 143 genera, 164 species, 17 varieties and 1 form, and Gamaso area, the lower terrain of the Buandaem and Cheongnim-ni areas are summarized as 75, 102 and 89 taxa, respectively. The plant species likes persimmon tree, paulownia tree and wild mulberry tree are dominant species in the Gamaso subpopulation, while Quercus variabilis is dominant at the lower terrain of the Buandaem. The intensive site management was applied to the Cheongnim-ni subpopulation, one of the original wild habitats of the species. The population dymanics was varied; the one or two sprouting number of stems was over 87% both at Gamaso area and the lower terrain of the Buandam, while the Cheongnim-ni subpopulation recorded as 74.8%. Also three sprouting number recorded as 16% and as 9.2% for sprouting on numbers of four to eleven. The invaded species likes Chenopodium album, Rumex obtusifolius, Phytolacca americana, Pharbitis nil, Solanum lyratum, Erigeron canadensis and Erigeron annuus, were found at the wild habitat of the species, and those invaded species grow faster than Abeliophyllum plants. Among three habitats of the target species in the studied area, the habitat which in located at the lower terrain of the Buandam and Gamaso region are known as translocated due to the dam construction, and wild subpopulation at Chongnim-ni, which is designated as Natural Monument No 370, is under threatened due to an intensive site management likes clearance of scrub amongst the Abeliophyllumplants. It is one of the evidence that Cuscuta japonica at the population indicated an intensive site management likes clearance of scrub is not proper habitat management protocol. Thus, further researches should be followed to determine the effect of canopy removal and other disturbance factors as management techniques.
Vascular plants, the structure and interrelationship of the forst vegetation in pyonsan peninsula national park were inverstigated by phytosociological, continuum analysis and ordination methods. The flora was composed of 119 families,411 genera, 609 species, 79 varieties, 10 forma or 698 taxa. Some characteristics of the plants have been represented such as ch-$D_1$-$R_5$ type in biological one, erect form in growth on. It is noticeable that lycoris aurea, carpinus tschonoskii var. eximia, corylus hallaisanensis and abeliophyllum distichun among the investigated plants delong to endemic and/or rare species. The forest vegetation was classified into seven communities: quercus variabilis, pinus densiflora, quercus serrat, platycarya, carpinus tschonoskii, quercus dentata, zelkova serrata community. and quercus variabilis, pinus densiflora and pinus rigida, were the commonest species among distributed species. In addition interrelationship between diversity and dominant indrx of quercus variabilis community was little different each other and that of accordance altitude also was not much distinguishable. Platycarya strobilacea, pinus densiflora and quercus variabilas community were distinguished different groups by polar ordination.
So-Dam Kim;Ae-Ra Moon;Shin-Young Kwon;Seok-Min Yun;Hwi-Min Kim;Dong-Hyoung Lee;Sung-Won Son
Korean Journal of Environment and Ecology
/
v.36
no.6
/
pp.639-650
/
2022
Abeliophyllum distichum Nakai, a rare plant with distylous characteristics, is native to certain parts of the Korean Peninsula. It is registered on the IUCN Red List of Threatened Species as a globally endangered plant. This study was conducted to establish an appropriate local conservation management plan suitable for future A. distichum populations by comparing and analyzing the flowering characteristics and population size according to distyly based on the results of quantitative surveys in 14 regions, including 8 areas with native populations of A. distichum and 6 natural monument populations. The number of individuals appearing in each population group was surveyed, and the flowering individuals were identified by style as being either pin or thrum flower types as they were being examined and recorded on the site. In total, 13,130 individuals of A. distichum (7,003 flowering and 6,127 non-flowering individuals) were recorded, but the balance of the number of pin- and thrum-flowered individuals in each population was not significant (p<0.05), indicating an imbalanced state. In particular, the Yeongdong (YD) population was very disproportionate compared to other populations, suggesting that its genetic diversity was low and the possibility of inbreeding was high. The average flowering and fruiting rates by management unit were much higher in the natural monument populations (89.2% and 55.3%, respectively) than in the natural habitat populations (39.0% and 8.5%, respectively). It may be due to a difference in reproductive growth resulting from light inflow into the forest caused by the upper crown closure. The area of occupation (AOO) of A. distichum on the Korean Peninsula covered an area of 23,224.5 m2. Although the natural monument population was smaller than the natural habitat population, its density was higher, likely as a result of the periodic management of natural monument populations, where the installation of protective facilities in certain areas restricts population spread. Conservation of A. distichum populations requires removing the natural monument populations suspected of anthropogenic and genetic disturbances and expanding the conservation priority population by designating new protected areas. Although the habitats of natural monument populations are managed by the Cultural Heritage Administration and local governments, there are no agencies that are responsible for managing natural habitat populations. Therefore, institutional improvement in the overall management of A. distichum should be prioritized.
You Ju-Han;Cho Heung-Won;Jung Sung-Gwan;Lee Cheol-Hee
Korean Journal of Environment and Ecology
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v.18
no.4
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pp.382-391
/
2004
This study was conducted to establish the effective and systematic counter plan of conservation by analyzing vegetation on Korean endemic plants and rare and endangered plants, Abeliophyllum distichum, habitats and to present the raw data and direction on counter plan of restoration. The dominant species of tree layers were Platycarya strobilacea(Goesan-gun Chujeom-ri I), Pinus densiflora(Goesan-gun Songdeok-ri II and Yulji-ri III), Robinia pseudo-acacia(Yeongdong-eup Maechon-ri IV), Quercus variabilis(Jincheon-gun Yongjeong-ri V) and Pinus densiflora$.$Quercus variabilis(Buan-gun Junggye-ri Ⅵ). Subtree layers were dominated by Quercus dentata(1st site), Quercus serratu(2nd site), Quercus acutissima(3rd site), Robinia pseudo-acacia(4th site), Zelkova serrata(5th site) and Quercus variabilis(6th site). And the dominant species of shrub layers were Lindera obtusiloba(1st and 5th site), Lespedeza bicolor(2nd site), Stephunandra incisa(3rd site), Quercus aliena(4th site) and Rhododendron schlippen-bachii(6th site). The dominant species of herb layers were surveyed Humulus japonicus$.$Pueraria thunbergiana(1st site), Oplismenus undulatifolius(2nd and 4th site), Carex siderosticta$.$Pueraria thunbergiana(3rd site), Streptolirion cordifolium$.$Humulus japonicus(5th site) and Sasa borealis(6th site). Among the surveyed sites, the Goesan-gun Yulji-ri supremely abounded in species and individuals, and there was surveyed each 21 species and 116 individuals. As well, this site showed the highest H'(1.123) and H'$_{max}$(1.322). Therefore, Goesan-gun Yulji-ri formed diverse vegetation and Yeongdong-eup Maechon-ri and Buan-gun Junggye-ri showed relatively poor vegetation.ation.
A comparative study of leaf epidermal microstructure in tribes Forsythieae (Abeliophyllum: 1 species, Forsythia: 12 taxa - 10 species, 2 varieties), Fontanesieae (Fontanesia: 2 species) including one related genus Myxopyrum belonging to Myxopyreae (Myxopyrum: 5 taxa - 4 species, 1 subspecies) was carried out using scanning electron microscopy (SEM) in order to evaluate their significance in the taxonomy. The leaves of investigated taxa are either hypostomatic or amphistomatic, but former is more frequent. The size range of the guard cells is 17.14-47.58 ${\times}$ 11.59- 44.25 ${\mu}m$: the smallest one was found in Forsythia giraldiana (17.48-22.96 ${\times}$ 11.64-12.88 ${\mu}m$), while the largest one was measured to Myxopyrum pierrei (31.50-41.75 ${\times}$ 32.53-44.25 ${\mu}m$). Anomocytic stomatal complex are most frequent type (rarely paracytic), usually both anomocytic and anisocytic occur in one leaf. In surface view both adaxial and abaxial anticlinal walls of the subsidiary cells are variable (e.g., straight/curved, undulate, sinuate, undulate/sinuate). Three types (simple unicellular and multicellular non-glandular, subsessile glandular) of trichomes are found in leaves. Finally, the systematic significance of the leaf epidermal micromorphological characters in idenfitication and elucidation of these tribe, between or within the genera including among the species is also briefly discussed.
Abeliophyllum distichum Nakai is deciduous shrubs of flowering plant in Oleaceae. It is important plant resources and consists of one species in the world. Also the endemic plant of A. distichum has been protected and designed endangered plant in Korea. For this reason, study on the immature seeds of A. distichum (ADS) hasn't progressed. In the present study, we evaluated the antioxidant activity and inhibitory effects on proteins and mRNA levels were related in the whitening effect in B16F10 cells. ADS was effective for reaction oxygen species (ROS). ROS causes various diseases such as aging, inflammation, cancer, and etc. Antioxidant properties were evaluated DPPH, ABTS radical scavenging activity and Reducing power. Plants were known that contained phenolic compounds were related in antioxidant activity. Phenolic compounds were phytochemicals commonly named natural polyphenols. These are secondary metabolites of plants involved in the defense against different types of stresses. In results, ADS suppressed the expression and transcription of Tyrosinase, TRP-1, TRP-2, and Microphthalmia-associated transcription factor (MITF). Tyrosinase, tyrosinase-related protein 1 (TRP-1), tyrosinase-related protein 1 (TRP-2) are known to play an important role in melanin biosynthesis. MITF regulated the expression and transcription of Tyrosinase, TRP-1, and TRP-2. In conclusion, ADS was effective in both antioxidant activities and whitening effects. Also, they were associated with the content of phenolic compounds. We suggested that ADS can be use antioxidants and skin-whitening functional cosmetics material derived from natural plant resources.
The study was carried out to offer the raw data on counterplan of restoration and conservation by systematical and objective analyzing the flora and herbaceous communities around Abeliophyllum distichum habitats. In the results of flora survey, as the site that the most taxa were showed was Yulji-ri, Geosan-gun III, there was surveyed as 114 ones; 48 families, 91 genera, 99 species and 15 varieties, and as Younjeong-ri, Jincheon-gun V was showed the fewest ones, there was appeared 54 ones; 28 families, 49 genera, 47 species and 7 varieties. The dominant species of herbaceous communities were verified Humulus japonicus${\cdot}$Artemisia princeps var. orientalis(Chujeom-ri, Goesan-gun I), Oplismenus undulatifolius(Songdeok-ri, Goesan-gun II and Maechon-ri, Yeongdong-eup IV), Carex siderosticta${\cdot}$Pueraria thunbergiana${\cdot}$Artemisia princeps var. orientalis(Yulji-ri, Geosan-gun III), Streptolirion cordifolium(Younjeong-ri, Jincheon-Eun V) and Sasa borealis(Junggye-ri, Buan-gun IV). In correlation analysis, Artemisia princeps var. orientalis${\cdot}$Carex siderosticta, Sasa borealis${\cdot}$Festuca ovina, Sasa borealis${\cdot}$Smilax china and Festuca ovina${\cdot}$Smilax china were showed the highest relativity. In similarity index analysis, as the site that was showed highest value was Yulji-ri, Geosan-gun III and Maechon-ri, Yeongdong-eup IV, there was turned up about some $27.27\%$. In the results of regression analysis between environmental factors and number of species, R-square of altitude and number of species was some $70.0\%$.
This experiments were carried out to find out the effects of different explant materials, kinds and concentration of plant growth regulators, and total nitrogen and sucrose contents on the in vitro regeneration of Abeliophyllum distichum Nakai. The effects of growth regulators on regeneration from 3 explant sources (leaf, internode and node) were more or less same. Leaf explants produced only callus with 2ip (Isopentenyladenine) and NAA (Naphthaleneacetic acid) treatment and other regulators had no effects. Test with internode explants yielded about same results but callus was obtained with 2,4-D (2,4-Dichlorophenoxyacetic acid). Node explants resulted in shoot regeneration by all regulator treatment except NAA and 2,4-D, but control also showed similar results. Callus formation from internode and node explants was vigorous by 2ip, zeatin, and 2,4-D treatments and high NAA concentration resulted in higher callus formation. In this experiment, various mixed treatment of growth regulators were also employed, using node as explant material. Shoot regeneration was obtained with BA (Benzyl adenine) + NAA treatments but the results were comparable with control. Generally shoot and root regeneration was poor with all combined treatment except 2ip + NAA and 2,4-D + NAA. However, callus was formed readily with all treatments. In this experiment, combined treatments of regulators were applied on the callus derived from singular regulator treatment. The results showed no shoot and root regeneration with any combination of 2,4-D, IAA (Indoleacetic acid) and NAA, but soft milky white callus was formed in all the treatments. No shoot and root regeneration was observed with any combination of 2iP, NAA and IAA, but somewhat hard, light green callus was formed in all the treatments. Callus formation decreased with high kinetin concentration in case of kinetin + NAA treatment. The experiments with total nitrogen content of media showed that low concentrations of 15 and 30mM were effective for the shoot and root regeneration. Sucrose experiment demonstrated shoot regeneration with 1${\sim}$4% concentration, and root and callus formation with 2${\sim}$4%. No root and callus formation was observed with 0 and 1% sucrose.
Traditionally, the Oleaceae has been divided into subfamilies Oleoideae and Jasminoideae. In the present paper, the taxonomical results so far made on the family were reviewed on the basis of palynology. The subfamilial classification is not well supported palynoligically, because both Myxopyrum of Jasminoideae and Comoranthus of Oleoideae having foveolate surface are well distinguished from the rest of the family having reticulate surface. The recent subfamily Nyctanthoideae (Takhtajan, 1977) including the monotypic Nyctanthus, was suggested to be included within the Jasminoideae although its closest relative on the palynological basis is different from that on the molecular basis. Tribal classification systems of the Jasminoideae are not well supported palynologically on the basis of surface character: presence or absence of bands on the mural ridge surface of the reticulum. On the basis of palynology, tribe Forsythiae including Abeliophyllum, Fontanesia, and Forsythia is monophyletic, and Fontanesia is well distinguished from the rest two. Korean species of Forsythia is divided into two: Forsythia koreana group and F. ovata-nakaii-saxatilis group. Recent discovery of F. saxatilis at a locality of F. ovata raised a question if the distinction between the two species on the basis of hairiness would be right. In the recent molecular studies, F. saxatilis var. lanceolata seems to be identified as F. saxatilis. Molecular studies showed that F. saxatilis (seemingly var. lanceolata or var. pilosa) is close to F. koreana. The fact in which the molecular result showed a close relationship between F. saxatilis varieties and F. koreana, is controversial to the result by floral and vegetative morphology. An intensive taxonomic study of these taxa would be needed.
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