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RISS 인기검색어
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- 저자 : 서계홍(Kye Hong Suh) (검색결과 4 건)
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강낭콩의 엽생장 , 확산저항 및 순광합성율에 (純光合成率) 미치는 수분스트레스의 영향
서계홍(Kye Hong Suh),김준호(Joon Ho Kim) 한국식물학회 1981 Journal of Plant Biology Vol.24 No.2
Effects of water stress on leaf growth, leaf diffusive resistance and net photosynthetic rate were studied on the first trifoliate leaves of snapbean(Phaseolus vulgaris L.) grown under controlled environmental conditions in a growth cabinet. As the drying cycle progressed, leaf water potential, relative water content and the net photosynthetic rate were decreased, but the leaf diffusive resistance was increased. Leaf growth in the elongation and the area was the most sensitive, but the net photosynthetic rate was the least sensitive to water stress. The grade of the leaf photosynthetic rate was the least sensitive to water stress. The grade of the leaf diffusive resistance after recovery was not affected by the different degrees of water stress experienced during the drying cycle but the recovering time attained to the control level was delayed. The leat diffusive resistance was not affected at leaf water potential above -8 bars, but increased rapidly below that value.
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Mannose 처리된 배추 잎의 무기인산 감소에 따른 비광화학성 소산의 증가
박연일(Youn Il Park),서계홍(Kye Hong Suh),홍영남(Young Nam Hong) 한국식물학회 1991 Journal of Plant Biology Vol.34 No.4
Limitation of photosynthesis in detached Chinese cabbage (Brassica campestris L.) leaves was induced by feeding of mannose (25 mM) for 12 h in the light, and changes in the basic thylakoid functions under this condition were investigated. The acid soluble phosphate content and CO_2 uptake rate was decreased by 66% and 67%, respectively. However, the starch content was increased by 24% compared to those of controls. From the fast induction curves of chlorophyll fluorescence, dark level fluorescence (F_O) slightly increased while intermediate plateau fluorescence level (F_I) to peak level fluorescence (F_P) transient was significantly decreased with a slight decrease in the F_O-to-F_I transient. This data means that reduction of secondary electron acceptor of PSⅡ (Q_B) might be more severely inhibited than that of primary electron acceptor of PSⅡ (Q_A) by decrease in phosphate level. The strong decline of (F_V)_m//F_m ratio suggests that efficiency of excitation energy capture by PSⅡ was decreased markedly. The quenching of F_O (qO), an indicator of state transition, was also occurred over the slow induction kinetics of chlorophyll fluorescence. From quenching analysis, fluorescence was dominantly quenched by nonphotochemical quenchings (qE+qT). These results showed that the capture and transfer efficiency of excitation energy to PSⅡ reaction center in thylakoid was decreased with the decline of leaf phosphate level, and that the state transition was occurred during the induction of photosynthesis under these conditions.
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서계홍 대구대학교 산업기술연구소 1988 産業技術硏究 Vol.7 No.-
The winter respiration in a mongolian oak stand was simulated with the computer program. The amount of CO₂ evolved by the winter respiration of the stand was estimated 43.52 ton CO₂ ha^(-1) and the amount of CO₂ evolved by the Q_(10) method was estimated 54.75 ton CO₂ ha^(-1) which was 25.8% more than the result by this method.
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서계홍 대구대학교 산업기술연구소 1988 産業技術硏究 Vol.7 No.-
Carbon dioxide balance of an individual mongolian oak was modelled based on the equations from the meteorological data and the relationship between organs and the gas exchange rates. Gross productivity, total respiration, and net productivity of an individual mongolian oak were estimated 13.2, 6.1, and 7.1kg CO₂/month, respectively.
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