• Plant Breeding and Biotechnology
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• 제5권4호
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• pp.363-370
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• 2017

In this study, Quercus acutissima seedlings were subjected to drought for 30 days then analyzed to determine their response to water deficit. The growth phenotype, chlorophyll fluorescence response, fresh weight, dry weight, photosynthetic pigment levels, soluble sugar content, and malondialdehyde (MDA) were measured to evaluate the effects of drought on plant growth and physiology. The growth phenotype was observed by infrared (IR) digital thermal imaging after 30 days of drought treatment. The maximum, average, and minimum temperatures of drought-treated plant leaves were $1-2^{\circ}C$ higher than those of the control. In contrast, the fresh and dry weights of the dehydrated leaves were generally lower than those of the control. There were no significant differences between treatments in terms of chlorophyll a, chlorophyll b, total chlorophyll, and carotenoid levels. Nevertheless, for the drought treatment, the $F_v/F_m$ and $F_v/F_o$ ratios (chlorophyll fluorescence response) were lower than those for the control. Therefore, photosynthetic activity was lower in the dehydrated plants than the control. The drought-stressed Q. acutissima S0536 had lower soluble sugar (glucose and fructose) and higher MDA levels than the controls. These findings may explain the early growth and physiological responses of Q. acutissima to dehydration and facilitate the selection of drought-resistant tree families.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2003년도 추계학술대회 발표논문 초록집
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• pp.130-130
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• 2003

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2005년도 International Symposium & conference of the Plant Resources Society of Korea
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• pp.59-59
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• 2005

• 한국균학회지
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• 제51권4호
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• pp.429-440
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• 2023

다양한 소비자의 선호도와 환경에 적합한 새로운 품종을 개발하는데에 야생표고버섯은 중요한 육종 소재이다. 14개의 지역에서 채집한 총 100개의 야생 표고 균주들의 사각블럭 톱밥배지 재배 환경내에서 자실체의 형태적 특성을 조사하였다. 각 지역에서 채집한 균주들의 형태는 다양하게 나타났다. 전체 균주들 중에서 갓 종단면은 평반구형 38%, 중앙볼록형 33%, 편편형 27%, 중앙오목형 2%가 나타났으며, 대의 형태는 기둥형 55%, 곤봉형 23%, 깔때기형 22%가 확인되었다. 갓의 형태는 화악산에서 가장 다양하게 나타났으며, 대의 형태는 여러 지역의 균주에서 다양한 표현형을 나타내었다. 동일한 산림에서 채집된 균주들 사이에서도 각각 다른 형태의 버섯이 관찰되었다. 다양한 환경에서 적응한 야생 표고 균주들은 스트레스에 대한 적응력이 향상된 품종을 개발하는 자원으로 활용될 수 다. 또한 다양한 유전자원의 확보와 형질을 연구하는 것은 새로운 육종품종을 개발하는데 자산이라고 생각한다.

• 한국자원식물학회지
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• 제19권1호
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• pp.144-149
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• 2006

본 연구는 나라꽃 무궁화의 아름다움을 나타내는 화색에 미치는 요인 중 토양산도와 무궁화의 화색특성과 생장과의 관계를 조사 연구함으로써 가장 이상적인 색깔을 갖추는 pH 범위를 파악하여 무궁화 화색육종 계획의 기초를 마련하고자 하였다. 토양산도별 생육특성을 조사하고 분석한 결과 홍화랑과 영광 품종은 pH 7에서 엽수가 183.73개와 135.87개로 가장 높게 나타났으며 pH가 증가함에 따라 증가하였다. 토양산도별 4품종의 화색변화를 조사하고 분석한 결과 홍화랑 품종은 pH가 높아짐에 따라 L값은 $17.05{\sim}12.26$로 점점 낮아졌으며 a값은 $16.37{\sim}20.91$로 점점 높게 나타났다.

• 한국농림기상학회지
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• 제7권1호
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• pp.51-56
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• 2005

To understand the chemical changes in the streamwater and contribution of subsurface discharge during the storm event, we analyzed electric conductivity (EC), anions, and cations in Gwangneung deciduous and coniferous forest catchment. The stream water samples were collected three times in 2004 by using an auto-sampler: September 7-9 (E040907-D and -C; where D and C indicate deciduous and coniferous forest catchment, respectively), September 11-13 (E040911-D and -C), and September 16-18 (E040916-D and -C). We found a negative relationship between discharge intensity and EC in streamwater. The E040911 and E040916 showed slack change of stream discharge in comparison to E040907 due to contribution of base flow recharged by much precipitation. Moreover, NO/sub 3//sup -/ concentrations in E040911-C were highest, which may have resulted from forest management such as thinning in 2004. The relationship between pH and alkalinity in stream water showed that much of stream water have been recharged through subsurface. We conclude that subsurface discharge highly influences streamwater quality in a forested catchment, and the seperation of stream water discharge is therefore necessary to sustainable water management.

• 인간식물환경학회지
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• 제22권2호
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• pp.209-217
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• 2019

Generally human sensibility is expressed in a certain language. To discover the sensibility of visitors in relation to the forest environment, it is first necessary to determine their exact meanings. Furthermore, it is necessary to sort these terms according to their meanings based on an appropriate classification system. This study attempted to develop a classification system for forest sensibility vocabulary by extracting Korean words used by forest visitors to express their sensibilities in relation to the forest environment, and established the structure of the system to classify the accumulated vocabulary. For this purpose, we extracted forest sensibility words based on literature review of experiences reported in the past as well as interviews of forest visitors, and categorized the words by meanings using the Standard Korean Language Dictionary maintained by the National Institute of the Korean Language. Next, the classification system for these words was established with reference to the classification system for vocabulary in the Korean language examined in previous studies of Korean language and literature. As a result, 137 forest sensibility words were collected using a documentary survey, and we categorized these words into four types: emotion, sense, evaluation, and existence. Categorizing the collected forest sensibility words based on this Korean language classification system resulted in the extraction of 40 representative sensibility words. This experiment enabled us to determine from where our sensibilities that find expressions in the forest are derived, that is, from sight, hearing, smell, taste, or touch, along with various other aspects of how our human sensibilities are expressed such as whether the subject of a word is person-centered or object-centered. We believe that the results of this study can serve as foundational data about forest sensibility.

• 식물분류학회지
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• 제52권2호
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• pp.123-126
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• 2022

Hibiscus sabdariffa L., (roselle) in the Malvaceae family is an erect subshrub known to be native to India and Malaysia. It is widely used as a food or tea material around the world, and its therapeutic effects have been widely studied. In this study, the sequencing of the complete chloroplast genome of H. sabdariffa was carried out. The result indicates a genome size of 162,428 bp, which is composed of a large single copy of 90,327 bp, two inverted repeats of 26,242 bp each, and a small single copy of 19,617 bp. Overall, a total of 131 genes were predicted, including 86 coding sequences, 37 tRNAs, and 8 rRNAs. According to a phylogenic analysis, it was clearly distinguished from outgroups such as other species of the genus Hibiscus used in the analysis.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.96-96
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• 2018

Although the roots of Heracleum moellendorffii (HM-R) have been long treated for inflammatory human diseases, scientific evidence for the anti-inflammatory activity of HM-R is not sufficient. In this study, we investigated anti-inflammatory activity and mechanism of action of HM-R in LPS-stimulated RAW264.7 cells. HM-R blocked LPS-induced NO and PGE2 production, but not HM-L. HM-R inhibited LPS-induced overexpression of iNOS, COX-2, $IL-1{\beta}$ and IL-6 in RAW264.7 cells. HM-R inhibited LPS-induced $NF-{\kappa}B$ signaling activation through blocking $I{\kappa}B-{\alpha}$ degradation and p65 nuclear accumulation. In addition, HM-R inhibited MAPK signaling activation by attenuating the phosphorylation of ERK1/2, p38 and JNK. Furthermore, HM-R inhibited attenuated LPS-mediated overexpression of the osteoclast-specific factors such as NFATc1, cathepsin K, MCP-1 and TRAP. These results indicate that HM-R may exert anti-inflammatory activity by inhibiting $NF-{\kappa}B$ and MAPK signaling activation. From these findings, HM-R has potential to be a candidate for the development of chemopreventive or therapeutic agents for the inflammation and inflammatory diseases.

• 한국자원식물학회지
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• 제31권5호
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• pp.547-553
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• 2018

This study was conducted to investigate the effect of branch extracts of Vaccinium oldhamii (VOB) on melanin synthesis in B16F10 cells. VOB promoted melanin production in absence or presence of ${\alpha}$-melanocyte-stimulating hormone (${\alpha}-MSH$) in B16F10 cells. However, VOB did not affect the expression of tyrosinase and TRP-1 associated with melanin synthesis at the mRNA and protein levels in B16F10. But, VOB decreased TRP-2 protein level and induced tyrosinase activation in B16F10 cells. Inhibition of tyrosinase activity and tyrosinase knockdown attenuated VOB-mediated melanin synthesis. In conclusion, VOB may stimulate melanin synthesis through activating tyrosinase activity.