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저면공급한 규소에 의한 포인세티아의 광합성 능력 향상과 고온 스트레스 경감
손문숙(Moon Sook Son),박유경(Yoo Gyeong Park),Iyyakkannu Sivanesan,고충호(Chung Ho Ko),정병룡(Byoung Ryong Jeong) 한국원예학회 2015 원예과학기술지 Vol.33 No.6
The effect of Si supplied during plant cultivation on tolerance to high temperature stress in Euphorbia pulcherrima Willd. ‘Ichiban’ was investigated. Rooted cuttings were transplanted into 10-㎝ pots and a complete nutrient solution, containing 0 or 50 ㎎·L<SUP>-1</SUP> Si as either K₂SiO₃, Na₂SiO₃, or CaSiO₃, was supplied through subirrigation or weekly foliar applications. After two months of cultivation, plants were placed in an environment-controlled chamber and subjected to 35 ± 1℃ (high temperature) conditions for 18 days. Enhanced specific activities of enzymatic antioxidants (APX) and suppressed specific activities of non-enzymatic antioxidants (ELP) were observed in the high temperature-stressed plants with Si application. The Fv/Fm (maximum quantum yield of photosystem II), photosynthetic rate, and Si contents in the shoot increased in the treatments of K₂SiO₃ and Na₂SiO₃ supplied through subirrigation. The Si-treated plants had more tolerance of high temperature stress than the control plants. Of the Si sources and application methods tested, K₂SiO₃ and Na₂SiO₃ supplied through subirrigation were found to be the most effective in enhancing tolerance to high temperature stress.


Runner Training Angle Affects Growth of Runners in ‘Seolhyang’ and ‘Maehyang’ Strawberries
Jin Zhao(조진),Yali Li(리야리),Yoo Gyeong Park(박유경),Jiangtao Hu(호강도),Byoung Ryong Jeong(정병룡) (사)한국생물환경조절학회 2020 생물환경조절학회지 Vol.29 No.3
딸기는 다년생 초본성 식물로 그 과실은 영양 가치가 높고 인기있는 고부가가치 채소작물이다. 본 연구는 딸기 품종 ‘설향’과 ‘매향’의 런너유인각도(RTA)가 절간장과 런너 발생수에 미치는 영향을 조사하여 자묘의 생산성을 높이고 번식효율을 증가시키기 위한 기초 자료를 얻고자 수행되었다. 러너를 0°(상향), 45°, 90°(수평), 135°, 또는 180°(하향)의 각도로 한 달 간 유인하였다. 이 실험은 유리온실에서 주간/야간 온도 29/20°C, 평균 광도 450 μmol m<SUP>-2</SUP>·s<SUP>-1</SUP> PPFD의 자연광 환경에서 수행하였으며, 1일 광주기는 12시간이었다. ‘설향’과 ‘매향’에 있어서 RTA는 런너 수와 절간장에 영향을 주었으며, 자묘 수, 생체중과 건물중에 영향을 미쳤다. RTA 135° 또는 180°에서 두 품종 모두 자묘의 평균 생체중과 건물중이 가장 작았으며, ‘설향’ 품종에서는 런너 길이와 절간장이 짧아졌다. RTA가 두 품종 모두에서 런너의 직경에는 영향을 미치지 않았지만 런너의 형태에는 영향을 미쳤다. RTA중 135°와 비교해서 180°가 가장 많은 자묘를 생산하여 가장 번식효율이 좋았다. Strawberry (Fragaria × ananassa Duch.), a herbaceous perennial crop, is a popular fruit crop with high economical and nutritive values. This study was conducted to investigate the effect of the runner training angle (RTA) on the length of internodes and number of runners produced in strawberry ‘Seolhyang’ and ‘Maehyang’ in an attempt to achieve a higher production rate of runner plants and increase the propagation efficiency. Runners were trained for 30 days to grow at an angle of 0° (vertically upward), 45°, 90° (horizontal), 135°, or 180° (hanging down) from the upward vertical axis. The experiment was carried out in a glasshouse with 29/20°C day/night temperatures, an average light intensity of 450 μmol·m<SUP>-2</SUP>··s<SUP>-1</SUP> PPFD coming from the sun, and a natural photoperiod of 12 hours. For both ‘Seolhyang’ and ‘Maehyang’, the RTA affected number and length of runners, and number and fresh and dry weights of runner plants. Training at an angle of 135° or 180° shortened length of runners and internodes in ‘Seolhyang’. These RTAs also produced runner plants with the lowest fresh and dry weights in both cultivars. The RTA did not affect the runner diameter, but affected the runner morphology in both cultivars. As compared to a RTA of 135°, a 180° RTA increased number of runner plants produced, making it the most proliferative RTA.