• Title/Summary/Keyword: Fraxinus

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Coumarin Glycosides of Fraxinus japonica Blume forma intermedia Hara (긴물푸레나무 근피(根皮)의 Coumarin성분(成分) 연구(硏究)(IV))

  • Yook, Chang-Soo;Kim, Dae-Sik;Kim, Sung-Man
    • YAKHAK HOEJI
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    • v.28 no.5
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    • pp.283-286
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    • 1984
  • Fraxinus japonica Blume forma intermedia Hara, belonging to Oleacae Family, is growing in Korea. The identification of the species with the root bark extract is possible through the TLC method, and is more distinctive than through the PPC. The methanolextract of the root bark of Fraxinus japonica Blume forma intermedia Hara gave two coumarin glycosides, (fraxin $C_{16}M_{18}O_{10}$ and aesculin $C_{15}H_{16}O_9$) and mannitol.

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Association of Aster Yellow Phytoplasma with Witches' Broom Disease of Ash (Fraxinus rhynchophylla Hence) in Korea

  • Han, Sang Sub
    • Journal of Korean Society of Forest Science
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    • v.94 no.2 s.159
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    • pp.103-107
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    • 2005
  • Typical phytoplasma whiches' broom symptoms were observed in Ash (Fraxinus rhynchophylla Hence) in Korea. The symptoms of the disease were showing abnormally small leaves, shorted internodes and proliferation of shoots. Examination of fluorescent and electron microscopy of leaf midribs revealed numerous phytoplasma bodies localized in the phloem tube cells. The phytoplasmas were detected in all the symptomatic samples by the amplification with phytoplasma specific primer pair P1/P7 consistently, and the expected size was 1.8 kb. However, the phytoplasma DNA was not detected in healthy seedlings. Based on sequence analysis of amplified region, this phytoplasma has close homologies with eqilodium phyllody, mulberry dwarf, and aster yellow phytoplasmas, 99.95%, 99.79% and 99.78%, respectively, This phylogetic analysis indicates that ash witches' broom phytoplasma should be classified in the aster yellow group 16SrVI and clearly distinct from the ash yellow group 16SrVII.

Oleuropein and Ligstroside from the bark of Fraxinus rhynchophylla (물푸레나무 수피의 Oleuropein과 Ligstroside)

  • Lee, Sang-Keug;Ham, Yeon-Ho;Bae, Young-Soo
    • Journal of the Korean Wood Science and Technology
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    • v.26 no.4
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    • pp.56-60
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    • 1998
  • The bark of Fraxinus rhynchophylla, one of ash trees grown in domestic, was collected, extracted with acetone-$H_2O$(7:3, v/v) and freeze dried to give 50g of ethylacetate soluble powder. A portion of the freeze dried powder was chromatographed on a Sephadex LH-20 and a TSK 40F column using a series of aqueous methanol and ethanol-hexane mixture as eluents. The extractives contained a large amount of coumarin derivatives in addition to a small amount of ester compounds such as ligstroside and oleuropein which have not been isolated from this tree species yet. Some spectrometric analyses such as NMR and FAB-MS including TLC were performed to identify the structures of the isolated ester compounds.

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Macruropyxis fraxini on Fraxinus rhynchophylla: Confirmation in the Korean Peninsula after 82 Years and the First Record in South Korea

  • Jung, Bok-Nam;Choi, Young-Joon;Shin, Hyeon-Dong;Park, Ji-Hyun
    • Mycobiology
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    • v.48 no.6
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    • pp.518-521
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    • 2020
  • Macruropyxis fraxini has been recorded on several species of Fraxinus in China, Japan, Russia (Far East), and North Korea since its first recorded observation as a rust fungus on F. rhynchophylla in Jilin, China, in 1899. In the Korean Peninsula, the rust fungus was first recorded on F. rhynchophylla in 1935, based on four specimens collected at Mt. Kumgangsan, Gangwondo Province, in the North Korean territory. We confirmed this rust in the Korean Peninsula after 82 years. The rust fungus was identified based on morphological characteristics and a molecular phylogenetic analysis. This is the first record of M. fraxini in South Korea.

Effects of Artificial Water Treatment on Chlorophyll Contents and Photosynthetic Characteristics in Fraxinus rhynchophylla and Fraxinus mandshurica Seedlings (인위적인 수분처리에 의한 물푸레나무와 들메나무의 엽록소 함량 및 광합성에 미치는 영향)

  • Lee, Soo-Won;Choi, Jeong-Ho;Chung, Jin-Chul;Kwon, Ki-Won;Yoo, Se-Kuel;Bae, Jong-Hyang
    • Journal of Bio-Environment Control
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    • v.17 no.2
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    • pp.101-109
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    • 2008
  • The content of chlorophyll a, b have generally increased for Fraxinus rhynchophylla and Fraxinus mandshuricain the order of month of June B>C and >D. Therefore we suppose the photosynthesis rate will increase if the moisture level is high and in regardless of the growth stage.

A Taxonomic Reconsideration of Fraxinus chiisanensis (Oleaceae) in Korea (물들메나무(Fraxinus chiisanensis)의 분류학적(分類學的) 재고(再考))

  • Min, Woong-Ki;Jeon, Jeong Ill;Chang, Chin-Sung
    • Journal of Korean Society of Forest Science
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    • v.90 no.3
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    • pp.266-276
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    • 2001
  • This study was conducted to clarify the taxonomic implications of F. chiisanensis Nakai based on morphology and flavonoids of four taxa of Fraxinus [F. chiisanensis Nakai, F. mandshurica Rupr., F. chinensis Roxb. var. rhynchophylla (Hance) Hemsl. and F. sieboldiana Blume] in Korea with one species of China and Japan (F. platypoda Oliv.). Morphologically F. chiisanensis was clearly distinguished from other taxa due to the presence of panicle from leafless lateral bud of previous year, apetalous flower, persistent calyx, and brownish naked bud. A survey of the foliar flavonoids of five species showed two distinctive chemical types. Unique flavones with flavonols, C-glycosylflavone and flavanone were detected in F. chiisanensis (chiisanensis type), while only flavonols, C-glycosylflavone, and flavanone were present in other four taxa (chinensis type). This study showed that F. chiisanensis was not a hybrid between F. mandshurica and F. chinensis var. rhynchophylla, but an endemic taxon distributed in southwestern Korea. Morphologically F. chiisanensis should be included into subgen. Fraxinus, sect. Melioides according to Chang and Qiu's classification. F. platypoda, a taxon of sect. Meliodies in China and Japan, was different from F. chiisanensis with respect of scaled bud, decurrent wing of samara and the lack of flavones (chinensis type). Since four American taxa of sect. Melioides contained flavones (chiisanensis type), they are more closely related with F. chiisanensis chemically.

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The Vegetation of Mt. Choksang (赤裳山의 植生)

  • Kim, Chang-Hwan;Seon-Hee Kang;Bong-Seop Kil
    • The Korean Journal of Ecology
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    • v.14 no.2
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    • pp.137-148
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    • 1991
  • The forest vegation and their structural characteristics in mt. chokang were investgated by phytosociological survey and ordination. It was classified five forests such as quercus tschonoskii community and fraxinus mandshurica community and this result has confirmed to coincide with community ciassification by polar ordination. Chang of diversity index was shown to decase, whereas dominance index, to increase according to chang high altitude. By soil moisture gradient, distribution pattern of fraxinus mandshurica, acer mono, carpinus cordata was in moist, but quercus serrata,˘quercus variabilis and mongolica, dry habitats.

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Ecological Forest Management and Reforestation Problem -Comparison of Diameter Increment of Fraxinus rhynchophylla between Artificial, Natural and Coppice Forest- (생태적 숲관리와 조림 문제 -조림지, 천연림, 맹아림에서 물푸레나무 직경생장 비교-)

  • 김갑태
    • Korean Journal of Environment and Ecology
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    • v.17 no.2
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    • pp.105-111
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    • 2003
  • To develope reforestation methods for enviromentally sound and ecological forest management, Fraxinus rhynchophylla stand structure and radial growth of the trees were invstigated and compared by study sites. Plantation forest studied on Fraxinus rhynchophylla, was located at Jawoon-ni Nae-myeun, Hongcheon-gun and natural forest studied on Fraxinus rhynchophylla, was located at Jangjeon-ni Jinbu-myeun, Pyeungchang-gun. In 7,8 years after planting, differences of annual diameter increment among three stand origins were significant. The highest mean annual diameter increments of F. rhynchophylla, 4.60 mm/year was measured in sprouting trees, and followed by natural seedlings 4.59 mm/year. The lowest values, 4.18mm/year did in planting trees. Early radial growth of planting F. rhynchophylla was measured lower than that of sprouting or natural seedlings. These facts mean that planting F. rhynchophylla is not proper regeneration methods. Other regeneration methods of F. rhynchophylla forest, by sproutings, direct seeding and natural seeding, might be researched and recommended.