• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1999.11a
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• pp.187-191
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• 1999

식물의 호흡에 영향하는 환경요인은 총 광합성율에 영향하는 모든 요인을 들 수 있으며 뿌리의 호흡에는 근권환경요인 및 질소 흡수량과 같은 영양요인도 들 수 있다. 환경요인의 변화에 따른 식물의 생장 및 수량을 예측하는 식물생장모형의 개발은 식물의 생장이 광합성과 호흡에 의해 좌우되므로 환경요화의 변이에 따른 생육모형개발이 우선적이라 할 수 있다. (중략)

• Journal of The Korean Association For Science Education
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• v.29 no.6
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• pp.712-729
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• 2009

This study aims to research high school students' misconception of botanic photosynthesis and respiration, and as the measure of rectifying the misconception, to develop the teaching program based on Driver's conceptual change model, applying it to classes and observing the effect. Selected as the research subject was sixty-six students in 1st year of a highschool located in Busan who had chosen Biology Learning as discretionary subject, with their conceptual level on botanic photosynthesis and respiration researched through tests in drawing and descriptive writing. As a consequence of applying drawing as a way of classifying the levels of students' misconception on photosynthesis and respiration, many students' drawings included their misconception caused by textbooks or scientists, but after application of Driver's conceptual change model, they drew scientific drawings including the fundamental factors of botanic photosynthesis and respiration such as light, carbon dioxide, water, glucose, oxygen, leaf, chloroplast, mitochondria, stoma, and energy. Likewise, as a result of the descriptive writing test implemented for researching the students' conception on the various aspects of botanic photosynthesis and respiration, many students in the pretest showed misconception on the point of time and location at which botanic photosynthesis and respiration occur, botanic nutrient, the role of a leaf in photosynthesis, and the relation between botanic photosynthesis and respiration, but after teaching based on Driver's conceptual change model, their misconceptions on photosynthesis and respiration were rectified to a high degree.

• Journal of Bio-Environment Control
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• v.9 no.4
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• pp.185-192
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• 2000

This study was conducted to develop mathematical model of respiration rate of cucumber plant under varying environmental conditions. 8.55% of gross photosynthesis of individual cucumber plant was used as respiration. Growth respiration coefficient was estimated as 0.0935. Maintenance respiration rate was estimated as 0.00158g CH$_2$g$^{-1}$ .h$^{-1}$ at 24$^{\circ}C$ of air temperature and it increased exponentially as air temperature became higher. Respiration rate decreased poportionally as content of storage carbohydrate became lower. Ion uptake respiration rate of roots was estimated as 0.6648g C$H_2O$.(gN)$^{-1}$ .

• Research in Plant Disease
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• v.29 no.1
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• pp.11-22
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• 2023

Resazurin-based microtiter assay was used to evaluate the inhibitory effect of fungicides on the respiration of Colletotrichum acutatum s. lat. 20JDS8 sensitive and 20CDJ6 resistant to strobilurin fungicides. The spores of C. acutatum s. lat. 20JDS8 were inoculated into potato dextrose broth (PDB) at densities of 1x10⁴, 1x10⁵ and 1x10⁶ spores/ml, respectively. The relative fluorescence unit (RFU) of all treatments inoculated at each spore density started to rise after 12 hr of incubation, and were 1,965.5, 5,412.5, and 10,061.0, respectively, after 24 hr of incubation. To evaluate the inhibitory effect of fungicide on the respiration of the pathogen, the spores of the pathogen were inoculated into the PDB and treated with the fungicides 0, 6, 12, and 24 hr after incubation, respectively. After keeping the pathogen culturing for another 24 hr, PrestoBlue reagent was treated into the PDB culturing the pathogen. The RFU of each treatment was examined 1 hr after the reagent was treated. When dithianon, isopyrazam, pyraclostrobin, and fluazinam were treated at high concentrations in the stages of spores (immediately after inoculation [0 hr]), spore germination (after incubation for 6 hr), and hyphal growth (after incubation for 12 hr), the respiration of pathogens was inhibited by 90-100%. When the fungicides were treated after culturing the pathogen for 24 hr, the respiratory inhibitory effects were greatly reduced. With pyraclostrobin-resistant C. acutatum s. lat. 20CDJ6, azxoystrobin, trifloxystrobin and kresoxim-methyl, which have the same mode of action, had very little or no respiratory inhibitory effect in all growth stages of pathogens. Based on the above results, it was thought that the resazurin-based microtiter assay could quickly and accurately evaluate the inhibitory efficacy of the fungicides that inhibited respiration.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.30 no.2
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• pp.154-157
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• 1985

This study was conducted to know the respiration rate in different organ of 4 years old ginseng plant on June 14 and in different root conditions of 6 years old on October 1. Respiration rate of each organ was the increasing order of young berry, leaf, peduncle, stem and root at all temperature(15$^{\circ}C$ to 30$^{\circ}C$). Temperature coefficients of respiration rate from 15$^{\circ}C$ to 30$^{\circ}C$ of each organ were 2.39 in young berry, 1.75 in leaf, 1.57 in root, 1.17 in stem and 1.16 in peduncle. There was no difference between respiration rate of large size root (117${\pm}$8.8g) and that of small size (54${\pm}$4.0g) in 6 years old ginseng. Respiration rate was decreased with the decrease in the water content in root, especially in small size root. And respiration rate of red skin root was higher than that of healthy root.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.5 no.10
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• pp.79-87
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• 1984

• Journal of Wetlands Research
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• v.20 no.2
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• pp.116-123
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• 2018

The objective of this study was to examine effects of stand age on soil $CO_2$ efflux in plantation Pinus koraiensis, and to elucidate what extent plant (fine) root and soil microbial biomass contribute to the whole soil $CO_2$ efflux. In three age classes (20-yr-old. 40-yr-old, 70-yr-old) of plantation Pinus koraiensis, in-situ soil respiration, plant fine root biomass and soil microbial biomass were measured from April to November in 2004. Regardless of stand age, soil temperature and soil $CO_2$ efflux increased until July then slowly decreased. Soil respiration was higher in 70-yr-old stand than in 20- and 40-yr stands. Fine root biomass and soil microbial biomass was also higher in 70-yr-old stand. Root exclusion decreased soil respiration in 40-yr stand, but not in 70-yr stand. Soil microbial biomass was higher in 70-yr stand, but there was no monthly variation between July and November. The results suggest that soil respiration may increase as plant stand ages and microbial contribution could play more roles in older stands.

• Journal of Bio-Environment Control
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• v.2 no.1
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• pp.65-68
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• 1993

탄산가스는 탄소나 그 화합물이 완전연소할 때, 생물이 호흡할 때, 발효 등에 의하여 생성되는 무색, 무취의 기체로 분자식은 $CO_2$(이산화탄소)이며, 분자량은 44, 비중은 공기 1에 대하여 1.529이다. 식물은 탄산가스와 물을 원료로 태양에너지를 이용하여 탄수화물을 합성하므로 탄산가스는 광합성에 절대적으로 필요하며, 탄산가스가 충분하게 공급되지 않으면 광합성이 원활하게 이루어질 수가 없다. 일반적으로 식물은 대기중의 농도(0.03%)보다 높은 농도에서 포화점을 갖고 있으므로 대기중에서의 탄산가스의 농도는 식물의 광합성작용에 충분하지 못하며, 생육촉진을 위해서는 인위적인 방법으로 탄산가스 농도를 증가시키는 방법이 실용화되고 있다.(중략)

• Journal of Life Science
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• v.15 no.1 s.68
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• pp.112-117
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• 2005

Plants living riverside show diverse resistance responses to submergence. The promoted petiole elongation of semi-aquaitc plants, e.g., such as Ranunculus sceleratus and Rumex palustris, is one of the adaptive responses mediated by the plant hormone ethylene. The gaseous hormone is trapped in submerged plant tissues and enhances the petiole growth by increasing sensitivity of the tissues to some plant hormones including auxin. Due to the stimulated growth of petioles, the leaves finally reach the water surface and can respirate again. At the water surface, the accumulated ethylene diffuses out from the tissues to the air. As a result, the increased hormone sensitivity decreases again, and thus the growth rate reduces to the basal level as before. The increased auxin sensitivities by ethylene observed in Ranunculus sceleratus, revealed by the changes in the auxin dose-response curves, indicate the increase of affinities of the receptors to auxin. However, the molecular mechanism of the affinity regulation remains still largely unknown, because the identity of the auxin receptor is still unclear.

• Proceedings of the Korean Society of Crop Science Conference
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• 1989.10a
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• pp.36-37
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• 1989