• 한국환경과학회지
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• 제15권12호
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• pp.1119-1124
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• 2006

Height-growth analysis was used to examine forest structure and compare Pterocarya rhoifolia and Fraxinus spaethiana growth characteristics within and between each species in two P. rhoifolia-dominant and two F. spaethiana established contemporaneously in the sere, species vertical stratification 25 years after stand initiation was such that P. rhoifolia dominated the overstory but F. spaethiana the understory, including that P. rhoifolia grew about 4 times more rapidly Similarly, F. spaethiana dominated the overstory but not the understory, in a stand where it established mainly by itself, 25 years after Initiation. However, comparing the two different stands, P. rhoifolia overstory heights were about two times greater than F. spaethiana. This suggests that in a disturbance regime, forest regeneration is affected by height-growth patterns such that P. rhoifolia's ability to achieverapid height growth allows it to dominate where lights growth allows it to dominate where light resources are continuously abundant.

• Journal of the Korean Wood Science and Technology
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• 제23권3호
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• pp.82-87
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• 1995

Anatomical characteristics of genus Platycarya, Juglans and Pterocarya of Juglandaceae occurring in Korea were described and coded based on the IAWA list. Juglandaceae are ring-porous or semi-ring-porous. Vessels have simple perforation plates and helical thickenings in some genus. Axial parenchyma cells were abundant, most apotracheal but rarely paratracheal and rays with 1-5 seriate. Platycarya is ring-porous wood with 2-3 rows of vessels in the pore zone. Helical thickenings were found only in small vessel of latewood. Axial parenchyma were commonly diffuse-in-aggregates or vasicentric. Rays 3-5 seriate. belonging to Kribs' heterogeneous II or III type with frequent occurrence of rhomboidal crystals. Juglans are semi ring-porous with few vessels in $mm^2$ and pores are commonly solitary. Axial parenchyma were diffuse-in-aggregate or marginal. Rays were mostly homocellular and 3-5 seriates. Pterocarya is similar to Juglans in anatomical features but the reticulate parenchyma consisting of 1 layer on transverse section and biseriate rays.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2004년도 봄 학술발표회 발표논문집
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• pp.144-145
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• 2004

• The Plant Pathology Journal
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• 제28권1호
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• pp.115-115
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• 2012

• Journal of Plant Biology
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• 제28권3호
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• pp.207-216
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• 1985

Radial immunodiffusion, rocket immunoelectrophoresis, and Boyden procedure have been employed as quantitative analysis of pollen proteins in a systematic investigation of selected amentiferous plant taxa. Data presented here are continued and supplementary to the previous qualitative analysis of immunoprecipitin systems for the same purpose. Although the number of taxa tested has been limited, the serological evidence indicates that the Betulaceae has the greatest similarity to the Fagaceae, next to the Juglandaceae, the least to the Salicaceae, when antisera against Alnus hirsuta and Betula platyphylla var. japonica were used for tests. Within the Betulaceae Alnus and Betula show greatly similar affinities together, but less similar to the rest of genera: Carpinus, Carya and Corylus. When antisera against Quercus aliena, Q. dentata, and Q. glauca were used for tests, the following decreasing order to serological affinities was obtained: Quercus Alnus, Betula Carpinus, Carya, Corylus Juglans, Pterocarya Populus. Overall serological data come closer to supportint the classification systems of Cronquist, Takhtajan, and Hutchinson; but less of Thorne and Bessey. In addition this investigation indicated that pollen, with its high protein content, provided an excellent source of extractable antigens for serosystematic researches.

• 한국응용곤충학회지
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• 제15권2호
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• pp.95-100
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• 1976

1975년 6월부터 10월 사이에 전남 곡성 서계리에서 개간 재배되고 있는 과수지대를 중심으로 그 주위의 호수나방유예의 식초 분포조사와 발생소장 및 당도를 조사하였다. 그 결과를 요약하면 다음과 같다. 1. 흡수나방 유충의 중요한 식초는 청미래덩굴, 자귀나무, 댕댕이덩, 정의다리, 개굴피나무이며 개굴피나무는 표고 500m 이상 고산지역에 분포되어있는 반면 다른 기주들은 표고 100-300m의 지역에 많이 분포되어있다. 2. 발생소장을 보면 6월 25일부터 발생하기 시작하여 10월 4일까지 출현하였는데 10월 4일까지 출현하는 자두와 복숭아에서의 나방방 최성기는 7月 13日경이며, 포도에서는 8月 310경이였다. 3. 6년 25일-10월 4일 사이에 13종의 흡수나방을 채집하였는데 가장 많이 채집된 것은 무궁화밤나방$(3.7\%)$, 애우묵밤나방$(17.7\%)$, 우묵밤나방$(12.9\%)$, 으름나방($9.1\%)$으로 전체의 을 차지하였다. 4. 복숭아와 자두의 당도를 보면 당도가 높을 수록 흡수나방의 피해는 컷으나 산도와는 큰 차이가 없었다.

• Natural Product Sciences
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• 제2권1호
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• pp.56-74
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• 1996

Prostaglandin $H_2$ synthase is the pharmacological target site of nonsteroidal antiinflammatory drugs. Inhibitory effects on cyclooxygenase activity of the synthase by extracts prepared from herbal medicines and wild plants in Korea have been estimated. Sixteen species out of 612 species exhibited more than 50% of inhibition on the enzyme activity. The active extracts prepared from Carex humilis, Celastrus orbiculatus, Eugenia caryophyllata, Gleditsia japonica var. koraiensis, Glycyrrhiza grabra, Glycyrrhiza uralensis, Gyrophora exculenta, Lespedeza maximowiczii, Morus alba, Persicaria conspicua, Prunus salicina, pterocarya stenoptera, Rheum undulatum, Vitis amurensis, and Vitis coignetiae have been sequentially washed with methylene chloride, ethyl acetate, n-butanol. Among the solvent fractions of the active herbal extracts, ethyl acetate fraction of Carex humilis exhibited the highest inhibitory effect on the cyclooxygenase activity of prostaglandin $H_2$ synthase.

• 한국환경복원기술학회지
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• 제26권2호
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• pp.25-46
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• 2023

The purpose of this study was to present the ecologically important data for conservation and management of river ecosystem. Namcheon Stream, the study site, is a local river flowing from the east to the west of Gyeongju. The results are as follows. The numbers of vascular plants were summarized as 518 taxa including 98 families, 321 genera, 467 species, 9 subspecies, 32 varieties, 4 forms, 4 hybrids and 2 cultivars. The rare plants were 4 taxa including Aristolochia contorta, Koelreuteria paniculata, Hydrocharis dubia and Sparganium stoloniferum. The Korean endemic plants were Populus × tomentiglandulosa, Salix koriyanagi, Lespedeza maritima, Weigela subsessilis and Hemerocallis hakuunensis. The floristic target species were 27 taxa including 2 taxa of grade IV, 4 taxa of grade III, 7 taxa of grade II and 14 taxa of grade I. The invasive alien plants were 92 taxa including Pterocarya stenoptera, Conyza canadensis, Vulpia myuros and so on. The ecosystem disturbing species were 6 taxa including Rumex acetosella, Sicyos angulatus, Solanum carolinense, Ambrosia artemisiifolia, Lactuca seriola and Symphyotrichum pilosum.

• 한국응용곤충학회지
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• 제32권1호
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• pp.101-104
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• 1993

호도나무의 식엽성해충인 벼슬집명나방(Locastra muscosalis Walker)의 기생식물 종류, 생활사 및 천적의 종류를 충북지방을 중심으로 조사하였다. 기생식물로 혹호도나무, 폐칸, 중국 굴피나무, 가래나무가 추가조사되었다. 벼슬집명나방은 연 1회 발생하였으며 성충 우화시기는 6월 하순부터 7월 하순까지였고 최성기는 7월 10일경이었다. 산란수는 560개 정도로서 기주식물 잎표면에 무더기로 산란하였음 란기간은 7~12일로 란기의 시기에 따라 차이가 있었다. 유충은 7월 중순경부터 잎을 거미줄로 묶고 군서하면서 잎을 식해하고 9월 중순부터 땅으로 내려와 토양 속 1cm 정도에 고치를 만들고 유충태로 월동하였으며 6월 중순경부터 용화하기 시작하였고 용기간은 평균 16일이엉ㅆ다. 또한 천경으로 기생성 3종, 포식성 6종및 병원미생물이 조사되었다.

• Journal of Ecology and Environment
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• 제35권2호
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• pp.91-98
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• 2012

This study was performed in order to suggest the possibility of tree species classification using high-resolution QuickBird-2 images spectral characteristics comparison(digital numbers [DNs]) of tree species, tree species classification, and accuracy verification. In October 2010, the tree species of three conifers and eight broad-leaved trees were examined in the areas studied. The spectral characteristics of each species were observed, and the study area was classified by image classification. The results were as follows: Panchromatic and multi-spectral band 4 was found to be useful for tree species classification. DNs values of conifers were lower than broad-leaved trees. Vegetation indices such as normalized difference vegetation index (NDVI), soil brightness index (SBI), green vegetation index (GVI) and Biband showed similar patterns to band 4 and panchromatic (PAN); Tukey's multiple comparison test was significant among tree species. However, tree species within the same genus, such as $Pinus$ $densiflora-P.$ $rigida$ and $Quercus$ $mongolica-Q.$ $serrata$, showed similar DNs patterns and, therefore, supervised classification results were difficult to distinguish within the same genus; Random selection of validation pixels showed an overall classification accuracy of 74.1% and Kappa coefficient was 70.6%. The classification accuracy of $Pterocarya$ $stenoptera$, 89.5%, was found to be the highest. The classification accuracy of broad-leaved trees was lower than expected, ranging from 47.9% to 88.9%. $P.$ $densiflora-P.$ $rigida$ and $Q.$ $mongolica-Q.$ $serrata$ were classified as the same species because they did not show significant differences in terms of spectral patterns.