• Title/Summary/Keyword: 생명의나무

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Physiological Response along with Drought Tolerance of Quercus gilva and Quercus glauca (개가시나무(Quercus gilva)와 종가시나무(Quercus glauca)의 건조 내성에 따른 생리 반응)

  • Yoonkyung Choi;Jungmin Lee;Euijoo Kim;Jiwon Park;Yoonseo Kim;Gyeongmi Cho;Sehee Kim;Gyuri Kim;Juseon Lee;Younghan You;Ara Seol
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2022.09a
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    • pp.41-41
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    • 2022
  • 제주 내 크게 6개 지역에 흩어져 분포하고 있는 곶자왈은 화산활동으로 형성되었으며 제주 산림생물자원의 46%가 분포하여 생물종다양성이 매우 높은 것으로 알려져 있다. 곶자왈은 자갈과 바위로 이루어져 있으며 토양이 적게 발달하여 건조에 직면할 가능성이 크다. 본 연구는 곶자왈에서 서식하는 멸종위기종이자 산림청에서 희귀식물로 지정한 개가시나무(Quercus gilva)와 같은 속이면서 공존하고 있는 종가시나무(Quercus glauca)의 건조 내성에 대한 반응을 알아보고자 실내에서 생리 반응을 연구하였다. 온도(22±2.94℃)와 토양 양분(10%)은 자생지의 값을 기준으로 처리하였으며 수분 처리는 토양을 채운 화분에 물이 화분 밑으로 새어나가기 직전까지 포장용수량 700mL를 공급한 후 27일간 단수하였다. 단수기간에 수분함량의 변화는 토양수분함량측정기(Watch Dog)를 설치하여 데이터를 수집하였다. 항목은 토양수분함량에 따른 광합성률, 증산률, 수분이용효율, 기공전도도, Fv/Fm, Fo, Fm, 엽록소함량을 측정하였다. 토양수분함량은 25, 27일째를 제외한 기간에 개가시나무가 종가시나무보다 높았다. 광합성률은 27일째를 제외한 기간에 개가시나무가 종가시나무보다 높았다. 증산률은 4, 5, 11, 14, 25, 27일째에 개가시나무가 종가시나무보다 낮았다. 수분이용효율은 13일째를 제외한 기간에 개가시나무가 종가시나무보다 높았다. 기공전도도는 3, 9일째에 개가시나무가 종가시나무보다 높았다. Fv/Fm은 22, 27일째를 제외한 기간에 개가시나무가 종가시나무보다 높았다. Fo은 3, 14일째를 제외한 기간에 개가시나무가 종가시나무보다 높았다. Fm과 엽록소함량은 기간에 개가시나무가 종가시나무보다 높았다. 이와 같은 실험 결과로 보았을 때 개가시나무가 종가시나무보다 건조 내성에 강한 것으로 판단된다.

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Antioxidant Effects of Picrasma quassioides and Chamaecyparis obtusa (S. et Z.) ENDL Extracts (소태나무 잎 및 편백나무 추출물의 항산화 효과)

  • Jung, Young-Tae;Lee, In-Seon;Whang, Key;Yu, Mi-Hee
    • Journal of Life Science
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    • v.22 no.3
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    • pp.354-359
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    • 2012
  • In our study, we investigated the antioxidant effect of methanol extract from the leaves of Picrasma quassioides (PQ) and Chamaecyparis obtuse (S. et Z.) ENDL (CO). Total polyphenol contents of methanol extracts from PQ and CO varied from 138.3 to $367.52{\mu}g/mg$ and total flavonoid contents varied from 8.12 to $46.41{\mu}g/mg$. Contents of polyphenol and flavonoid in PQ were found to be extremely high. In addition, the methanol extract of PQ had a higher antioxidant activity in both DPPH ($4.79{\mu}g/ml$) and ABTS ($7.21{\mu}g/ml$) compared to other plants (CO). Based on the results of the FRAP assay, PQ showed a value of $8.52{\mu}mol/{\mu}g$ and CO exhibited a value of $1.77{\mu}mol/{\mu}g$. The methanol extracts from the leaves of PQ showed the highest radical-scavenging activity in various antioxidant systems.

A Study on the Cosmetic Materials of Abies nephrolepis MAX. Extracts with Whitening Activity (미백활성을 가진 분비나무(Abies nephrolepis MAX.) 추출물의 화장품 소재로써 연구)

  • Oh, Min-Jeong;Yeom, Hyeon-Ji;Chae, Jung-Woo;Lee, Jin-Young
    • Journal of Life Science
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    • v.32 no.6
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    • pp.430-437
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    • 2022
  • We conducted a study on the whitening activity of Abies nephrolepis MAX. extracts. The electron-donating ability of 70% ethanol extracts from A. nephrolepis MAX. Stem (AN-S) and A. nephrolepis MAX. Leaf (AN-L) were found to be 89.4% and 90.9% at 1,000 ㎍/ml concentration, respectively. Their ABTS+ radical scavenging abilities were found to be 88.8% and 96% 500 ㎍/ml concentration, respectively. Their tyrosinase inhibitory effects were found to be 48.5% and 31.1% at 500 ㎍/ml concentration, respectively. Cell survival rates measured in B16F10 were examined with the AN-S and AN-L extracts. Results showed cell viabilities of 98.3% and 94.4% at 500 ㎍/ml concentration, respectively. The protein and mRNA expression inhibitory effects of AN-S and AN-L extracts were measured by Western blotting and RT-PCR, respectively, at 25, 50 and 100 ㎍/ml concentrations. The results of western blotting showed that the AN-S extract at 100 ㎍/ml concentration decreased the TRP-1 protein expression rate by 46%. The results of Western blotting also showed that the AN-L extract at 100 ㎍/ml concentration decreased the MITF protein expression rate was by 54.6%. Consequently, in the case of MITF, TRP-1, TRP-2, and tyrosinase, the amount of mRNA expressed decreased as the concentration of the extracts increased. Our results suggested that A. nephrolepis MAX. extracts can be used as a functional cosmetic material by confirming that they can be used as a whitening material.

A Study of the Anti-inflammatory Effects of Abies nephrolepis MAX. Extract in RAW 264.7 Cells (RAW 264.7 세포에서 분비나무(Abies nephrolepis MAX.) 추출물의 항염 효과에 대한 연구)

  • Min-Jeong Oh;Hyeon-Ji Yeom;Jin-Young Lee
    • Journal of Life Science
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    • v.34 no.3
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    • pp.160-169
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    • 2024
  • In this study, Abies nephrolepis MAX. was divided into A. nephrolepis MAX. stem (AS) extract and A. nephrolepis MAX. leaf (AL) extract. Their anti-inflammatory abilities and applicability as cosmetic materials were determined. Tests of the cell survival rate measured using RAW 264.7 cells and extracts of AS and AL showed 97.8% and 95.6% cell viability at a 500 ㎍/ml concentration. To determine anti-inflammatory activity, we examined the inhibitory effects on the production of LPS-induced NO in RAW 264.7 cells by Griess assay. The results showed that the AS and AL extracts presented a concentration-dependent inhibition of NO production. The protein expression inhibitory effects of AS and AL extracts were measured by western blot at 25, 50, and 100 ㎍/ml concentrations. β-actin was used as a positive control. The results of western blot of extracts from AS showed that the expression inhibition rate of the iNOS protein was decreased by 50.1% at the 100 ㎍/ml concentration. Additionally, the results of western blot of AL extracts showed that the expression inhibition rate of COX-2 and iNOS protein was decreased by 66% and 8.2% at the 100 ㎍/ml concentration. The mRNA inhibitory effect was measured by RT-PCR at 25, 50, and 100 ㎍/ml concentrations. GAPDH was used as a positive control. Consequently, the iNOS mRNA expression effect by RT-PCR of AS extract demonstrated by RT-PCR decreased by 27.9% at the 100 ㎍/ml concentration, and the iNOS and IL-6 mRNA expression effect of AL extract measured by RT-PCR decreased by 48.6% and 48.7% at the 100 ㎍/ml concentration.

First Record of Subgenus Pronocerodes Plavilstshikov (Coleoptera: Cerambycidae: Ropalopus) from Korea (한국산 미기록아속 Pronocerodes Plavilstshikov (딱정벌레목: 하늘소과: 삼나무하늘소속)에 대한 보고)

  • Lee, Seunghyun;Oh, Seunghwan;Lee, Minhyeuk;Seung, Jinbae;Lee, Seunghwan
    • Korean journal of applied entomology
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    • v.60 no.3
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    • pp.335-338
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    • 2021
  • The subgenus Pronocerodes Plavilstshikov (Coleoptera: Cerambycidae: Cerambycinae) is reported from Korea for the first time with a species of Ropalopus (Pronocerodes) aurantiicollis Plavilstshikov, 1940. The morphological information is provided with a key to the Korean Ropalopus and photographs of an adult specimen.

A Study on the Standardization Method of Wild Seedlings of Abies koreana E.H. Wilson on Mt. Hallasan (한라산 구상나무(Abies koreana E.H. Wilson)의 천연묘 기준화 방안 고찰)

  • Choi, Im Jun;Lee, Jong-Won;Kang, Shin-Ho
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2019.04a
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    • pp.73-73
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    • 2019
  • 전나무속(Abies Miller, 1754)은 지구상에서 북반구를 중심으로 50여 종이 현존하고 있다. 전나무속은 주로 높은 고도의 산지 또는 수목 한계선 주변에 자연적 분포지를 형성하고 있으며, 국내에는 전나무(A. holophylla), 분비나무(A. nephrolepis) 및 구상나무(A. koreana), 총 3종이 자생하고 있다. 하지만 국내에 자생하는 3종의 경우도 쇠퇴가 급격히 진행되고 있다. 특히 대한민국 특산식물인 한라산의 구상나무는 IUCN Redlist 상의 'Threatened species' category 종으로 등재되어 있을 뿐만 아니라 구상나무 어린 나무(치수)의 수가 급격히 줄어 우리 사회에서 문제가 직면한 '저출산 고령화 사회'와 유사하다고 할 수 있다. 하지만, 구상나무의 어린 나무에 관한 연구가 미비한 실정이다. 게다가 선행연구에서도 어린 나무의 기준이 모호하다. 따라서 본 연구는 구상나무 등 국내 자생하는 구상나무 천연묘의 기준을 정립하여 추후 진행되는 구상나무 등 전나무속 어린 나무에 관한 연구에 표준화를 유도할 수 있을 것으로 기대된다. 우선, 국내.외 소나무과 어린나무에 관한 논문을 정리 및 분석하였고, 구상나무 어린나무가 자생하는 숲의 구조(제주조릿대 등) 및 환경(암석노출도) 등)에 적절한 높이와 아린흔의 갯수를 참고로 기준안을 제시해 보고자 한다. 본 연구의 기준안은 선행연구에서 조사된 구상나무 어린나무 3,138개체의 높이 및 아린흔 갯수를 토대로 구분해볼 수 있었다. 우선, 높이에 대한 기준은 1년생묘(당해묘, 5cm 미만)-유묘(5cm~10cm 미만)-성묘(대묘, 10cm~30cm 미만)-치수(30cm~100cm 미만) cf.전생치수-유목(100cm 이상) 5단계로 구분되었다. 아린흔 갯수에 대한 기준도 또한 1년생묘(1개)-유묘(2개~6개)-성묘(대묘, 7개~15개)-치수(16개~20개) cf.전생치수-유목(21개 이상) 5단계로 구분되었다.

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Ecological Niche Overlap Between Quercus acutissima and Q. dentata with Soil Moisture and Nutrient Gradients (상수리나무와 떡갈나무의 수분과 영양소 구배에 따른 생태지위 중복역)

  • Kyeong Mi Cho;Ara Seol;Yoon Kyung Choi;Se Hee Kim;Eui Joo Kim;Yoon Seo Kim;Jung Min Lee;Ju Seon Lee;Gyu Ri Kim;Ji Won Park;Jae Hoon Park;Young Han You
    • Journal of Wetlands Research
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    • v.25 no.2
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    • pp.159-165
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    • 2023
  • This study measured the ecological niche overlap between two deciduous oak species(Quercus acutissmia and Q. dentata) according to the change in growth responses after treating with the moisture and nutrient contents of the soil at four gradients, and interpreted the degree of competition between the two oak species by ordination method. In the moisture environment gradient, the ecological niche overlap of the two species was high in the photosynthesis-related leaf organs and low in plant architecture such as shoot length. In addition, in case of competition between two oaks, Q. dentata was remarkably dominant in soil moisture gradient, but Q. acutissimia slightly was slightly advantageous over Q. dentata in the soil nutrient gradient. These results show that even in a similar taxonomical group growing in a similar habitat, the response to the organ system of the plant varies depending on the type of environment factor, resulting in different competitive differences among plants.

Whitening Activity of Sambucus Sieboldiana Var. Pendula (Nakai) Extract (말오줌나무 추출물의 미백활성 검증)

  • Yoo, Dan-Hee;Kim, Jin-Tae;Oh, Min-Jeong;Yeom, Hyeon-Ji;Lee, Jin-Young
    • Journal of Life Science
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    • v.29 no.3
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    • pp.279-286
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    • 2019
  • This study evaluated the anti-oxidant and whitening effects of a 70% ethanol extract of the Sambucus sieboldiana var. pendula (Nakai) (SS). At $1,000{\mu}g/ml$ concentration, the electron donating ability of this SS extract was found to be 86.21% and the ABTS+ radical scavenging ability was 97.9%. In terms of whitening activity, the tyrosinase inhibitory effect of the extract was 37%, also at $1,000{\mu}g/ml$ concentration. To explore the extractefftoxicity to B16F10 melanoma cells, a 3-[4,5-dimethyl-thiazol-2-yl]-2,5-diphenyl-tetrazoliumbromide assay was performed. Results showed 90% or more cells remained viable at $100{\mu}g/ml$ concentration. A Western blot of the SS extract was used to measure microphthalmia-associated transcription factor (MITF), tyrosinase-related protein-1 (TRP-1), tyrosinase relate protein-2 (TRP-2), and the tyrosinase protein expression inhibitory effect at 25, 50, $100{\mu}g/ml$ concentrations; ${\beta}-actin$ was used as a positive control. Consequently, the MITF, TRP-1, TRP-2, and the tyrosinase protein expression inhibitory effect were seen to decrease by 34.5%, 45.6%, 58.4%, and 79.6%, respectively, at $100{\mu}g/ml$ concentration. These were also then measured by reverse transcription-polymerase chain reaction at 25, 50, $100{\mu}g/ml$ concentrations with GAPDH as a positive control. As a result, the SS extract was seen to decrease MITF, TRP-1, TRP-2, and the tyrosinase protein expression inhibitory effect by 85.4%, 67.5%, 85.2%, 67.1%, respectively at the $100{\mu}g/ml$ concentration. We therefore confirmed the possibility of Sambucus sieboldiana var. pendula (Nakai) extract as a whitening material.