Aging are both global and domestic issues. In Korea, the population aged 65 and over accounted for 14.8% of the total population in 2018 and 14.4% in Jeju island. The Korea National Statistical Office estimates it will reach 41% by 2060. As the elderly population increases, socioeconomic policy changes and researches on health aging have been carried out especially in developed countries. Representative studies are telomere studies and molecular inflammation. Korean researchers also have made efforts to elucidate the secret of aging including TLR5 (Toll-like receptor 5)/caveolin study in Jeolla province, and ROS (reactive oxygen species) and molecular inflammation in Gyungsang province. However, Research on aging is still underway and research on gut microbiota started in Jeju province, centering on progeria, is expected to give hope.

현재 농가에서 이용되고 있는 보광등과 난방등의 특성을 조사하고 하우스내 기상 환경과 절화장미의 개화와 품질에 미치는 영향을 알아보기 위해 실험을 수행하였다. 보광등으로는 LED등(light emitting diode lamp, LED), 메탈할라이드등(metal halide lamp, MH), 고압나트륨등(high pressure sodium lamp, HPS)을, 난방등으로는 나노탄소섬유 적외선등(nano-carbon fiber infrared lamp, NCFI)을 절화장미 재배상 위에 설치하였다. 그 결과 LED와 NCFI의 광도는 각각 6.8μmol·m-2·s-1과 0.4μmol·m-2·s-1으로 매우 낮은 반면, MH와 HPS는 79 ~ 100μmol·m-2·s-1 범위로 높은 편이었다. 또한 LED와 MH는 적외선역에 파장이 없어 발열량이 거의 없었으나, HPS와 NCFI는 적외선역에 파장이 많아 발열이 많은 것으로 나타났다. 동일한 공간에서 칸막이로 실험구간을 나누어 실험이 수행되었음에도 불구하고 MH, HPS, NCFI에 의해 온도는 2°C 정도 상승되는 결과를 얻었으나, 습도에서는 처리간 차이가 보이지 않았다. 광도에 상관없이 모든 전등들은 절화장미의 개화를 촉진시켜 무처리구에 비해 적게는 5 ~ 7일, 많게는 12 ~ 14일 개화가 촉진되는 것으로 나타났다. 광량이 충분한 봄철에는 전조처리에 의해 개화소요일수가 짧아지는 만큼 절화장도 대조구보다 짧아졌지만, 광량이 부족한 겨울철에는 전조처리에 의해 절화장이 길어져 품질이 향상되는 결과를 얻을 수 있었다.

Chrysanthemums (Dendranthema grandiflorum ‘Iwanohakusen’) were grown in a greenhouse with complete nutrient solution system to investigate the effect of silicon (Si) supplement on salt induced deleterious effects in chrysanthemum plants. The experiment was conducted in plastic pots supplemented with a mixture of upland soil : leaf mold : river sand (3:3:4, v:v:v). Si and salinity were treated in combination with two levels of NaCl (0 and 100 mM) and two sources of silicon (K2SiO3, KSi and silicate fertilizer, SiF) at the same concentration (1.8 mM Si) by weekly-drenching for 12 weeks. Chrysanthemum plants supplemented with Si increased in fresh and dry matter enhancing water content and salinity tolerance. The plants grown under salt stress produced less fresh and dry matter than control plant. However, Si supplement to plants under salt stress ameliorated negative effects of salt stress. In soil, EC and NaCl increased by salt stress were mitigated by Si supplement. Salt stress significantly decreased the contents of K and P in leaf, but Si supplement under salt stress significantly recovered the decreased contents with enormous desorption of K and P in soil. Added Si significantly increased content of available SiO2 with its adsorption by salt stress in soil, which was directly related to Si accumulation in leaf. However, Si uptake by roots was suppressed by salt stress irrespective of Si supplement. Si supplement did not ameliorated the negative effects of salt stress on chlorophyll content and membrane integrity in leaf of chrysanthemum plant although significantly increased Si content in leaf, but reversed pest (Liriomyza trifolii) resistance to above-control level.

The purpose of this study was to determine the effects of swiss ball program training on lower extremity function of old elderly with mild cognitive impairment. The subjects were 30 mild cognitive impairment eldrly people aged between 65 and 80, who were divided into the swiss ball program training group(n=15) and the control group(n=15). The swiss ball program training group engaged in a 50-minute exercise session using. Lower extremity function scale of the two groups were measured before and after the intervention. The results are as follows. According to the swiss ball program training conducted to examine the effects of the training on lower extremity function, Moreover, the two groups showed significant differences in lower extremity function. These results indicate that virtual reality training is effective in improving lower extremity function. To conclusion, swiss ball program was found to have a positive effect on elderly lower extremity function. Swiss ball program training can be proposed as a form of fall prevention exercise for the mild cognitive impairment. Swiss ball program may be helpful to reduce the incidence of dementia and behavioral complications.

A new spray chrysanthemum cultivar, 'Plaisir D'Amour' was released by National Horticultural Research Institute (NHRI), Rural Development Administration (RDA), in 2006. The cross was made in 2003 between '01B1-355', a breeding line of NHRI and `01B1-440', a breeding line of NHRI. After evaluation for the characteristics including shading culture in summer and retarding culture in spring between 2004 and 2006, final selection was made. The natural flowering time of 'Plaisir D'Amour' is late October, but year-round flowering is possible by shading and illumination. It has single type flowers with mixed color by dark pink and white edged. It shows excellent flower setting and early blooming with multi-floret. The diameter of flower is 5.4 cm. The number of flowers per stem is 15.5 and number of petals per flower is 21.5. The days to flower under short day treatment is about 56 and its vase life is 21 days in autumn season.

A new spray chrysanthemum cultivar, 'Pink PangPang' was released by National Horticultural Research Institute (NHRI), Rural Development Administration (RDA), in 2006. The cross between 'Restone' and 'Lollipop' was made in 2003. After evaluation for the characteristics including shading culture in summer and retarding culture in spring between 2004 and 2006, final selection was made. The natural flowering time of "Pink PangPang" is late October, but year-round flowering is possible by shading and illumination. It has pompon type flowers with light pink petals and resistance to white rust. The diameter of flower is 4.3 cm. The number of flowers per stem is 13 and the days to flower under the short day treatment is about 44 in summer season.

A new cultivar ofDianthus caryophyUus "Dreambyul" was selected from the progenies ofa cross "Zenga" and "Euge-nia" in 1999 at the National Horticultural Research Institute, Rural Development Administration. It was fmally selected in 2002after the investig

A new cultivar of Dianthus caryophyHus "Orion" was selected from the progenies of a cross "Rossini" and "Tropicshort node of upper shoot. Optimum temperature for its growth are over 8"C at night and under 25"C at day in summer. The cul- tivar was applied