• Korean journal of applied entomology
• /
• v.61 no.4
• /
• pp.633-638
• /
• 2022

Banker plants are non-crop plants that can be used to maintain natural enemies of crop pests. Orius laevigatus (Fieber) (Heteroptera: Anthocoridae) is an important natural predator used to control pest insects, such as thrips, in horticultural crops. The development of suitable banker plants is necessary to maintain O. laevigatus populations within agricultural areas and to effectively improve thrips control. The oviposition rate of O. laevigatus was compared when reared on various flowering plants, such as sedum, rose moss, and chrysanthemum; oviposition rate was highest on the yellow-flowered chrysanthemum variety than on any other plant. This study provides important information for the practical application of banker plants to improve the efficiency of O. laevigatus in agricultural areas.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.40 no.1
• /
• pp.29-36
• /
• 2011

The present study was performed to investigate antioxidant activities of Korean edible wild extracts. In water and methanol extracts of edible wild plants, total polyphenol content of water and methanol extracts ranged 4.6~183.8 and 8.2~270.1 mg/g, respectively. Radical scavenging activity against DPPH and ABTS radicals was observed to be high in Lysimachia barystachys, Aceriphyllum rossii, Securinega suffruticosa, Sedum kamtschaticum, and Pedicularis resupinata. Pedicularis resupinata, Securinega suffruticosa, Patrinia villosa, and Solidago virga-aurea var. asiatica showed effective SOD-like activity. There was significant correlation between polyphenol content and DPPH and ABTS radical scavenging activities, and SOD-like activity. Plant extracts such as Pedicularis resupinata, Securinega suffruticosa, Rhapontica uniflora, Lysimachia barystachys, and Aceriphyllum rossii had higher polyphenol content, radical scavenging, and SOD-like activity. These results indicate that Korean edible wild plants may be useful as potential antioxidant sources for improving human antioxidant defense system.

• KIEAE Journal
• /
• v.13 no.5
• /
• pp.89-96
• /
• 2013

Green roofs can reduce surface water runoff, provide a habitat for wildlife moderate the urban heat island effect, improve building insulation and energy efficiency, improve the air quality, create aesthetic and amenity value, and preserve the roof's waterproofing. Green roofs are mainly divided into three types : intensive, simple-intensive, and extensive. Especially, extensive roof environment is a harsh one for plant growth; limited water availability, wide temperature fluctuations, high exposure to wind and solar radiation create highly stressed environment. This study, aimed at extensive green roof, was carried out on the rooftop of the library at Seoul Women's Univ. from October to November, 2012 and from March to August, 2013. To suggest the most effective vegetation model for biodiversity and heat island mitigation, surface temperatures were monitored by each vegetation model. We found that herbaceous plants of Aster sphathulifolius, Aceriphyllum rossii and Belamcanda chinensis, shrub of Syringa patula 'Miss Kim', Thymus quinquecostatus var. japonica, Sedum species can mixing each other. Among them, the vegetation models including Sedum takesimense, Aster sphathulifolius, Thymus quinquecostatus var. japonica was more effective on the surface temperature mitigation, because the species have the tolerance and high ratio of covering, and also in water. Especially, in the treatment of bark mulching, they helped to increase the temperature of vegetation models. In the case of summer, temperature mitigation of vegetation models were no significant difference among vegetation types. Compared to surface temperature of June, July and August were apparent impact of temperature mitigation, it shows that temperature mitigation are strongly influenced by substrate water content.

• Journal of Plant Biology
• /
• v.28 no.1
• /
• pp.29-44
• /
• 1985

This study was carried out to investigate the types and frequency of abnormal stomata in Crassulaceae. We observed the surface of the leaves on twenty four species involved five varieties belonging to eight genera of Crassulaceae. Nineteen types of abnormal stomata were found in the families. Among them three types such as the single guard cell, the aborted stomata, and the single-aborted guard cell were highly observed from nineteen to twenty four species, and two types of the overlapped-thickening guard cells and the arrested stomata exhibited commonly from seven to thirteen species. The another types of them rarely occurred from one to five species. Most of abnormal stomata were found in S. alboroseum, P. chinense and S. sarmentosum, and a few types of them were observed in the other species. The three types of the ballooning guard cells, the cross cleaved stomata, and the fused pore stomata were first reported here in the seed plants. It was thought that the abnormal stomata were formed by the result of degeneration and abnormal development of normal stomata.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.40 no.3
• /
• pp.91-98
• /
• 2012

The objective of this study was to analyze the effects on the growth of Sedum species by different soil in shallow green roof module system, and to find the best soil mixture. The experiment used a module system, 7cm soil depth, five types of soil mixture ratio, and it was carried out on 7th Hoar rooftop in December of 2010. The growth status of the plant showed the most superior of the P5C7P2V1, next P10C1P2V1 and P1P1V1, P1 and C1 showed very poor growth. This result showed that the soil mixture ratio (P5C7P2V1) in green roof module system with minimum management can contribute to the proliferation of rooftop greening in urban settings.

• Korean Journal of Organic Agriculture
• /
• v.24 no.4
• /
• pp.787-795
• /
• 2016

The purpose of this study was to assess drought tolerance of groundcover plants for extensive green roof. Form July to November 2013, plant height, chlorophyll content, soil moisture, evapotranspiration and survival rate was measured. As results, after unirrigation started, Aster koraiensis reached 0% of soil moisture earliest followed by Sedum kamtschaticum, Hemerocallis fulva, Hylotelephium spectabile, Iris sanguinea, Hosta longipes and control. Among the plants, A. koraiensis withered earliest on 19th day of unirrigation experiment, followed by H. longipes and H. fulva (27th day); and I. sanguinea (29th day). S. kamtschaticum and H. spectabile survived even after 120th day of the experiment. As for chlorophyll content, I. sanguinea showed constant values in early stage than rapidly decreased right before its withering. Chlorophyll content of A. koraiensis and H. fulva showed rapid decrease from the beginning, while that of H. spectabile and S. kamtschaticum showed continuous reduction for first 30 days and the reduction was slowed down since then. In conclusion, H. longipes, I. sanguinea and H. fulva were found most applicable for extensive green roof considering scenic aspect.

• Journal of Plant Biotechnology
• /
• v.36 no.1
• /
• pp.18-22
• /
• 2009

This work was conducted to establish an efficient plant regeneration system for genetic transformation and the in vitro conservation of Sedum sarmentosum genetic resources. Effects of glutamine and $AgNO_3$ on plant regeneration between two genotypes were investigated using MS media supplemented with 0.2 mg/L NM and 3.0 mg/L BA. Calluses were formed on leaf explants placed on MS solid media supplemented with 3 mg/L 2,4-D and 1 mg/L BA. Calluses of Keumsan local strain produced shoots at a frequency of up to 100% after 50 days of culture on medium supplemented with glutamine. The highest number of shoots per callus was 17.6 at 350 mg/L glutamine. However, calluses of Wanju local strain gave rise to no shoots under the same culture conditions. Likewise, calluses of Keumsan local strain produced shoots at a frequency of up to 100% after 50 days of culture on medium supplemented with $AgNO_3$ whereas Wanju local strain sporadically produced shoots. The highest number of shoots per callus of Keumsan local stain was 16.1 at $15{\mu}M$ $AgNO_3$. Regenerated shoots were subcultured on hormone-free MS medium for rooting and shoot growth, and then 3-5 cm high plantlets were transplanted to the artificial soils comprising vermiculite and perlite, where they survived at a frequency of 88-100%. After being transplanted into upland soil:sand (1:1, v/v) in a greenhouse, regenerated plants showed a morphologically normal growth.

• Korean Journal of Environment and Ecology
• /
• v.27 no.6
• /
• pp.745-756
• /
• 2013

This study was carried out to suggest an experimental base to maintain the sustainability of extensive green roof as considering moisture demand by the type of the green roof plant before construction. The changes of soil moisture content, chlorophyll content, coverage of Sedum kamtschaticum and Dianthus chinensis var. senperflorens in two type of perlite soil and mix soil, were investigated under the condition of no rainfall and no irrigation during one month. The result shows that with the increase of stress time, soil moisture content and chlorophyll content on leaf were in a downward trend; After 30 days, Soil moisture content were lowest in 10 cm depth perlite soil system planted Dianthus chinensis. and 20 cm depth mix soil system planted Sedum kamtschaticum had the highest soil moisture. Generally soil moisture contents of soil system planted Dianthus chinensis var. senperflorens were lower than that of soil system planted Sedum kamtschaticum. In 10 cm depth soil system, state of plant growth was better than 20 cm depth soil system both perlite soil and mix soil type. It can be confirmed.

• Horticultural Science & Technology
• /
• v.29 no.3
• /
• pp.195-200
• /
• 2011

The growth, yield and quality of Sedum sarmentosum between soil and hydroponic cultivation were compared to produce high-quality shoots in summer season. The plants were collected from four places in Korea and cultivated in a plastic film house with 50% shading. A 1:1:1 mixtures of sand, upland soil and substrate (N-P-K: 330-220-400 $mg{\cdot}L^{-1}$) was used for soil cultivation, and a nutrient film technique (NFT) with Yamazaki-lettuce nutrient solution used for hydroponics. After 30 days of cultivation, plant height ranged from 18.4 to 21.8 cm and showed no significant difference between soil and hydroponic cultivation. Number of shoot, leaf length, leaf width, number of leaf, fresh weight, and dry weight significantly increased in hydroponics compared to those in soil cultivation. Fresh and dry weights in hydroponics were greater in 'Gunsan' and 'Wando' collections than those in other collections. Stem diameter and compression-force significantly increased in soil cultivation rather than hydroponics with significant differences among collections. However there were no significant differences in shoot bitterness and vitamin C content between cultivation methods or among the collections. Most mineral contents except Fe in hydroponics were higher than those in soil cultivation. K, Na, Zn contents in hydroponics were over 2 times higher than those in soil cultivation.

• Korean Journal of Environment and Ecology
• /
• v.25 no.3
• /
• pp.404-411
• /
• 2011

The purpose of this study was to analyze the characteristics of plant covering in the extensive green roof site. Eighteen herbaceous perennial grass such as Caryopteris incara and sedum species such as Sedum Kamtschaticum were planted on an experimental green roof with 10cm substrate depth in 2007. This study investigated vegetation change over 3 growing seasons 2007-2009. The covering rates of planted species mostly increased in 2008, but declined in 2009 except 6 species such as sedum specis and Thymus quinquecostatus var. japonica etc. There were four categories of covering characteristics generated from the results of this study. These include the type of sustain planting site, the type of encroach adjacent site, the type of creeps and spreads, and the type of scatters and spreads. The covering models of eight planted species were drawn by simple regression analysis. However more monitoring of various plants will be needed to establish the information for sustainable roof planting plan.