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닭의 장풀에서 빛 처리시 분리한 표피 또는 온전한 잎 표피의 아포플라스트내에 존재하는 슈크로스 , 포도당 및 말레이트의 농도 변화와 이들 화합물질들이 기공개폐에 미치는 영향
이준상,김기동 ( Joon Sang Lee,Ki Dong Kim ) 한국환경생물학회 1996 환경생물 : 환경생물학회지 Vol.14 No.2
The effects of light on the change of apoplastic concentration of sucrose, D-glucose, and 2L-malate both of attached and detached epidermis was investigated. There was a considerable increase in the apoplastic concentration of sucrose (4.5mM), D-glucose (2.4mM), and L-malate (3.2mM) in the dark when compared with light treatment. When the intact leaf was exposed to light for 3 hours, stomatal aperture was 11.4㎛ but 0㎛ under the darkness. This suggests that the compouns transported from the mesophyll are stored in the apoplast during the dark and move into the guard cell cytoplasm when stomata start to open. When isolated epidermis was directly incubated with D-glucose and sucrose, they markedly inhibited stomatal opening. Sucrose (40%) was more effective in inhibiting stomatal opening than glucose (26%). Malate (93%) completely inhibited stomatal opening. ATP (5mM) and IAA stimulated stomatal opening by about 1m and 2.5㎛ respectively after 2 hours. These results indicate that there is a clear communication of photosynthetic compounds between mesophyll cells and epidermal cells, but anyone of the compounds we tested did not show as a trigger or stimulator of stomatal opening caused by light.
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저온기 딸기 고설 수경재배시 온실기온에 따른 배지내 온도강하 모델 개발
박재완(Jae Wan Park),하유신(Yu Shin Ha),김기동(Ki Dong Kim),박대흠(Dae Heum Park),이기명(Ki Myung Lee),전하준(Ha Joon Jun),권순구(Soon Gu Kwon),최원식(Won Sik Choi),정성원(Sung Won Chung) (사)한국생물환경조절학회 2010 생물환경조절학회지 Vol.19 No.3
본 연구는 저온기 딸기 고설 수경재배 방식의 배지 내 온도 관리를 위한 기초자료를 얻기 위하여 베드 2종류(플랜트형, V형), 배지 4종류(왕겨, 펄라이트, 왕겨 80%+ 피트모스20%, 펄라이트80%+피트모스20%), 멀칭 2종류(멀칭무, 멸칭유)의 처리구별로 온실기온 4수준(1.5, 3.2, 5.0, 6.7℃)에 따른 배지 내 온도의 변화를 측정하였다. 그 결과, 베드의 온도강하는 V형 베드가 플랜트형 베드보다 평균 1.2~2℃ 느리게 나타났으며, V형 베드의보온 효과가 크게 나타났다. 배지의 종류별로는 왕겨 80%의 배지보다 펄라이트 80%의 배지에서 멀칭의 유무에 관계없이 배지온 강하가 약 7℃ 느리게 나타났다. 멀칭유무별로는 멀칭한 경우에서 온도강하가 느리게 나타나 멀칭을 하는 것이 배지온유지에 유리하였다. 보온효과가 큰 V형 베드, 펄라이트80%+피트모스20% 배지, 멀칭한 경우의 배지온강하 모델은 f(x) = -0.2656 + 0.1345x로 나타났으며, 개발된 모델을 이용하면 저온기에서 야간의 온실 내 기온에 따른 배지내의 온도강하를 예측할 수 있을 것으로 판단되었다. A study on modeling of medium temperature drops of the elevated-bench hydroponic system for strawberry cultivation during low temperature season was conducted. Four different conditions were used for the experiment. These consisted of two kinds of bed types (plant, V), four kinds of medium (rice, perlite, rice hulls80% and peatmoss20%, perlite80% and peatmoss20%), two kinds of mulched bed (mulched, non mulched) and four kinds of greenhouse air temperature (1.5, 3.2, 5.0, 6.7℃), and the results were summarized as follows: Temperature drop of medium in the V-bed was slower than that in the plant bed, showing better insulation effect of V-bed. Temperature drop of medium with mulching on the top of the bed was slower than the case without mulching, as a result, the beneficial effect of temperature drop was appeared in mulched bed. Linear regression of the temperature descent rate and the temperature difference between medium and air showed significant correlation. The regression equation for the Pearlite80% and Peatmoss20% in the V-bed was f(x) = -0.2656 + 0.1345x at the R² of 0.9269. Using the model, the temperature drop during night can be predicted for the various media at the different depths.
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