• 제목/요약/키워드: Tree Species Identification

검색결과 150건 처리시간 0.028초

다호리 출토 판상 칠기의 재질 분석 (Analysis of Flat Board-shaped Lacquer ware Excavated from Daho-ri in Changwon, Korea)

  • 김수철;박민수;윤은영
    • 박물관보존과학
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    • 제13권
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    • pp.33-36
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    • 2012
  • 다호리 유적에서 출토된 판상칠기에 대하여 수종 및 칠 도막, 금속장식 분석을 실시하였다. 판상칠기에 사용된 수종은 소나무류로 식별되었고 칠 도막의 현미경 관찰 결과, 총 5회의 칠을 했으며 칠 전체 두께는 약 100 ㎛이다. 적외선 분광 분석을 통해 정제칠과 비교하여 옻칠임을 확인하였다. 원형의 금속장식에 대한 성분 분석 결과는 주석과 납의 이원계 합금으로 백랍(白蠟, Pewter)이라 불리는, 주석을 주체로 하는 합금으로 확인되었다. 더불어 지금까지 조사된 다호리 유적 출토 유물의 수종이 활엽수재였던 것에 반해 판상칠기의 목재는 침엽수재인 소나무류로 밝혀졌다.

A Chinese Wood Species, Hongmu and Its Characteristics for Identification

  • Fu, Yunlin;Liu, Zhi;Chun, Su-Kyoung
    • 한국가구학회지
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    • 제17권2호
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    • pp.1-7
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    • 2006
  • A chinese wood species called China Hongmu, is an excellent wood to make high quality furniture owing to attracting color, beautiful grain, and durability. Hongmu is not a tree or wood species name. The general designation in Hongmu group is a similar to one of its density, structure, color and use. Hongmu considers more than 30 hardwood species of Pterocarpus, Dalbergia, Diospyros, Millettia, and Cassia. According to the macrostructural characteristics and properties, Hongmu group can be classified into 8 groups which are Zitanmulei, Hualimulei, Heisuanzhimulei, Hongsuanzhimulei, Xiangzhimulei, Wumulei, Tiaowenwumulei and Jichimulei. In this paper, the growing areas, scientific names and identifiable characteristics of these Hongmu group species were introduced for help to identify China Hongmu and its products in the market as well.

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I-SSR 표지자분석을 이용한 대추나무 품종간 유연관계 분석 (Assessment of Genetic Relationship among Date (Zizyphus jujuba) Cultivars Revealed by I-SSR Marker)

  • 남재익;김영미;최고은;이귀용;박재인
    • 한국산림과학회지
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    • 제102권1호
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    • pp.59-65
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    • 2013
  • 대추나무는 우리나라에서 중요한 과수이다. 이전의 대추나무의 분류는 형태적 특성에 근거하였다. 그러나 표현형적인 특성은 환경의 영향 받아 정확한 품종 식별에 문제가 있다. 반면에 DNA 표지자는 빠르고 정확하게 식물종을 식별할 수 있다. I-SSR은 DNA를 이용한 분자표지의 하나로 유전적 유연관계와 가까운 관계에 있는 품종들의 식별에 유용하다. 본 연구에서는 16개의 I-SSR primer를 이용하여 5종의 한국 대추나무 품종과 중국에서 도입된 1종의 대추나무 품종을 분석하였다. I-SSR 분석을 통하여 primer당 6.25개인 100개의 증폭산물을 얻었고, 그 중 45개의 증폭산물(45%)이 다형성을 나타냈다. Primer별로 증폭된 밴드의 수는 2개에서 13개였다. 다형성 유전자좌의 비율은 10%에서 100%였다. I-SSR 지문분석 결과 '보은대추'와 '대리대추'는 분자수준에서 품종 특이적인 식별 가능한 DNA 패턴들이 나타났다. 군집분석결과 유전적 유사도지수는 0.68~0.92로 나타났다. '보은대추'와 '대리대추'가 독립적인 그룹들로 유집되었으며, '월출대추', '금성대추', '무등대추' 그리고 '복조대추'가 한 그룹으로 합쳐졌다. 이상의 결과로, I-SSR 표지를 이용한 분석방법은 '복조대추'와 '보은대추' 품종의 식별에 활용될 수 있음이 확인되었다.

Teak (Tectona grandis Linn. f.): A Renowned Commercial Timber Species

  • Palanisamy, K.;Hegde, Maheshwar;Yi, Jae-Seon
    • Journal of Forest and Environmental Science
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    • 제25권1호
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    • pp.1-24
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    • 2009
  • Teak (Tectona grandis) is one of the most valuable timber yielding species in the world, with predominant distribution in tropical or sub-tropical countries. However, natural teak available only in few countries like India, Myanmar, Laos People's Democratic Republic and Thailand. Teak grows well in deep, well-drained alluvial soils, fairly moist, warm, tropical climate with pH ranges from 6.5-7.5. Teak is cultivated in many Asian, African and South American countries for timber production. The global teak plantations are estimated to be three million hectare with major share in India (44%) followed by Indonesia (33%). India is considered as richest genetic resources of teak with large areas of natural teak bearing forests (8.9 million ha), plantations (1.5 million ha), clonal seed orchards (1000 ha) and seed production areas (5000 ha). The studies on diversity of teak populations showed that teak is an out crossing species with major portion of diversity present within the populations. The productivity and quality of teak timber varies depending upon the site and environmental conditions. Teak wood is moderately heavy, strong and tough,straight grained, coarse textured and ring porous with specific gravity varies from 0.55 to 0.70. The sapwood is white to pale yellow in colour and clearly demarcated while heartwood is dark brown or dark golden yellow in colour. Teak is one of the most durable timbers in the world, practically, impervious to fungus and white ant attack and resistant to decay. Teak wood is used in ship and boat constructions, furnitures and aesthetic needs. Genetic improvement programmes have been undertaken in countries like Thailand, India, Malaysia and Indonesia. The programme includes provenance identification and testing, plus tree selection and clonal multiplication, establishment of seed orchards and controlled hybridization. Several aspects like phenology, reproductive biology, fruit characteristics, silvicultural practices for cultivation, pest and diseases problems, production of improved planting stock, harvesting and marketing, wood properties and future tree improvement strategy to enhance productivity have been discussed in this paper.

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Identification and characterization of S-RNase genes in apple rootstock and the diversity of S-RNases in Malus species

  • Kim, Hoy-Taek;Moriya, Shigeki;Okada, Kazuma;Abe, Kazuyuki;Park, Jong-In;Yamamoto, Toshiya;Nou, Ill-Sup
    • Journal of Plant Biotechnology
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    • 제43권1호
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    • pp.49-57
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    • 2016
  • We isolated and confirmed two S-RNases, denoted as mpS1 and mpS2, from apple rootstock 'Marubakaido' (Malus prunifolia Borkh. Var. ringo Asami). These S-RNases contained and conserved five cysteine residues and two histidine residues, which are essential for RNase activity. The mpS1 showed high similarity to S5 (99.1%) of Malus spectabilis, whereas the mpS2 showed 99.5% nucleotide sequence similarity to S26 of (Malus ${\times}$ domestica) and 99.6% to S35 of (Malus sieversii) when compared with reported S-RNases. In amino acid sequences, the mpS1-RNase was almost similar to the S5-RNase of Malus spectabilis, and the mpS2-RNase was similar to the S35 of Malus sieversii, with only one bp being different from the S26-RNase of Malus ${\times}$ domestica. The 57 S-RNases of Malus species were renamed and rearranged containing the new S-RNases, as mprpS35 (mpS2) and mprpS57 (mpS1), for determining S-genotypes and identifying new alleles from apple species (Malus spp.).

The distribution and three newly reported species of aerial algae at Mt. Gwanggyo, Korea

  • Kim, Ji-Won;Lee, Ok-Min
    • Journal of Ecology and Environment
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    • 제37권4호
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    • pp.327-339
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    • 2014
  • This research includes the identification and cultivation of aerial algae from 33 sites located in Mt. Gwanggyo of Gyeonggi-do, Korea, from March 2011 to August 2012. The ecological factors of aerial algae were analyzed and a total of 29 taxa were identified in 4 phyla, 5 classes, 11 orders, 15 families, 19 genera, 28 species and 1 variety; 12 taxa of cyanophytes, 8 taxa of chrysophytes, and 9 taxa of chlorophytes were found. As for newly recorded cyanophytes of Korea, Komvophoron jovis, Microcoleus steenstrupii, and Nostoc edaphicum appeared. Komvophoron jovis, previously known to grow on rocks and boulders, appeared in soil. Microcoleus steenstrupii, reported to appear in desert soils, appeared on the wet surface of the soil after rain. Nostoc edaphicum, in symbiosis with fungi, appeared on tree bark as the lichen. Thus, there are a total of 99 reported taxa of Korean aerial algae, including 3 species that were discovered in this study.

데이터 수집방법에 따른 딥러닝 기반 산림수종 자동분류 정확도 변화에 관한 연구 (A Study on the Performance of Deep learning-based Automatic Classification of Forest Plants: A Comparison of Data Collection Methods)

  • 김보미;우희성;박주원
    • 한국산림과학회지
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    • 제109권1호
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    • pp.23-30
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    • 2020
  • 최근 급변하는 컴퓨터 기술의 발전을 통해 컴퓨터 비전과 머신러닝을 이용한 사물인식 기법이 다양한 학문 분야에서 사용되고 있다. 국내의 연구 사례를 보면 주로 대면적 산림을 분석하기 위한 이미지 학습 및 객체인식 기법이 사용되는 반면 개체목 단위의 수종 분류 및 특징을 학습하는 연구는 아직 미미한 실정이다. 이에 본 연구는 한국의 침엽수 5종을 대상으로 이미지 학습을 통한 자동분류 연구의 가능성을 분석해 보았다. 데이터 형태에 따른 분류 결과의 차이를 분석하기 위하여 산림전문가가 직접 촬영한 영상(D1)과 웹크롤링을 이용한 영상(D2)을 사용하여 수종 분류를 실시하였다. 그 결과 D1과 D2의 분류 정확도에 유의미한 차이가 있는 것으로 나타났으며, D1은 D2보다 높은 분류 정확도를 나타냈다. 또한, D2의 분류 정확도를 높이기 위해서는 검열되지 않은 영상 데이터의 노이즈를 줄이기 위한 추가 데이터 필터링 기법이 필요한 것으로 사료된다.

Identification and Characterization of Ceratocystis fimbriata Causing Lethal Wilt on the Lansium Tree in Indonesia

  • Suwandi, Suwandi;Irsan, Chandra;Hamidson, Harman;Umayah, Abu;Asriyani, Khoirotun Dwi
    • The Plant Pathology Journal
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    • 제37권2호
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    • pp.124-136
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    • 2021
  • Bark canker, wood discoloration, and wilting of the duku tree (Lansium domesticum) along the watershed of Komering River, South Sumatra Province, Indonesia first appeared in 2013. The incidence of tree mortality was 100% within 3 years in badly infected orchards. A Ceratocystis species was consistently isolated from the diseased tissue and identified by morphological and sequence analyses of the internal transcribed spacer (ITS) and β-tubulin regions. Pathogenicity tests were conducted and Koch's postulates were confirmed. The fungus was also pathogenic on Acacia mangium, but was less pathogenic on mango. Partial flooding was unfavourable for disease development. Two described isolates (WRC and WBC) had minor variation in morphology and DNA sequences, but the former exhibited a more pathogenic on both duku and acacia. The ITS phylogenies grouped the most pathogenic isolate (WRC) causing wilting of the duku tree within the aggressive and widely distributed ITS5 haplotype of C. fimbriata.

Taxonomy and phylogeny of the genus Cryptomonas (Cryptophyceae, Cryptophyta) from Korea

  • Choi, Bomi;Son, Misun;Kim, Jong Im;Shin, Woongghi
    • ALGAE
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    • 제28권4호
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    • pp.307-330
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    • 2013
  • The genus Cryptomonas is easily recognized by having two flagella, green brownish color, and a swaying behavior. They have relatively simple morphology, and limited diagnostic characters, which present a major difficulty in differentiating between species of the genus. To understand species delineation and phylogenetic relationships among Cryptomonas species, the nuclear-encoded internal transcribed spacer 2 (ITS2), partial large subunit (LSU) and small subunit ribosomal DNA (rDNA), and chloroplast-encoded psbA and LSU rDNA sequences were determined and used for phylogenetic analyses, using Bayesian and maximum likelihood methods. In addition, nuclear-encoded ITS2 sequences were predicted to secondary structures, and were used to determine nine species and four unidentified species from 47 strains. Sequences of helix I, II, and IIIb in ITS2 secondary structure were very useful for the identification of Cryptomonas species. However, the helix IV was the most variable region across species in alignment. The phylogenetic tree showed that fourteen species were monophyletic. However, some strains of C. obovata had chloroplasts with pyrenoid while others were without pyrenoid, which used as a key character in few species. Therefore, classification systems depending solely on morphological characters are inadequate, and require the use of molecular data.

우리나라 미꾸리속(genus Misgurnus) 알비노 개체의 미토콘드리아 및 핵 유전자 염기서열 분석에 의한 유전적 동정 (Genetic Species Identification by Sequencing Analysis of Nuclear and Mitochondrial Genes for Albino Misgurnus Species from Korea)

  • 송하윤;문신주;김근식;방인철
    • 한국어류학회지
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    • 제29권2호
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    • pp.139-145
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    • 2017
  • 최근 우리나라에서 자연발생적인 미꾸리속 알비노 개체들이 낮은 빈도로 출현하고 있으나, 색소 결핍으로 인해 형태적종 동정이 어렵다. 따라서 본 연구에서는 핵 유전자인 recombination activating gene 1 (rag1) 영역 및 미토콘드리아 유전자 cytochrome b (cytb) 영역을 이용한 분자계통학적 분석을 이용해 미꾸리속 알비노 개체의 분자동정을 수행하였다. 그 결과 rag1과 cytb의 분자계통도에서 미꾸라지, 미꾸리, 그리고 M. mohoity로 3개의 clade가 확인되었다. 확보된 M. mohoity의 염기서열을 유전자은행의 BLAST를 이용해 유사성을 검색한 결과 M. mohoity와 가장 유사하였다. 분자계통도를 기준으로 25마리의 알비노 미꾸리속 개체의 종 동정을 수행한 결과 빨간 눈 타입은 미꾸리 16마리, 미꾸라지 1마리로 판별되었고, 나머지 3개체는 미꾸라지♀${\times}$미꾸리♂ 잡종 1마리와 M. mohoity ♀${\times}$미꾸리♂ 잡종이 2마리 판별되었다. 또한 검은 눈타입 5마리는 미꾸리 1마리와 미꾸라지 3마리 및 M. mohoity 1마리로 판별되었다. 따라서 본 연구에 이용한 분자마커를 활용함으로써 미꾸리속 어류의 정확한 종 또는 잡종을 동정하기 위한 유용한 방법으로 이용될 수 있을 것이다.