식물생장조절제 및 광도가 국화 경정배양에 미치는 영향

Allan B. Siano,Mi Young Chung,Ki Byung Lim,Jae-Dong Chung,Chang Kil Kim,Jae Suk Park 한국화훼산업육성협회 2007 화훼연구 Vol.15 No.3

생장조절물질과 광도가 국화 경정배양에 미치는 영향 을 조사하였다. 다신초(multiple shoots) 형성은 국화 경 정을 MS배지에 kinetin 2.0mg·L-1와 NAA 0.2mg·L-1 첨가된 배지에 배양하였을 때 촉진되었으며, 형성된 다 신초는 MS배지에 kinetin 2.0mg·L-1와 NAA 0.02 mg·L-1 첨가된 배지에 배양하였을 때 생육이 촉진되었 다. 한편, 국화 경정을 NAA 0.2mg·L-1와 BA 1.0mg·L- 1가 첨가된 배지에 배양하였을 경우에는 절편체당 신초 형성 수가 6.9개로 가장 많았으나 형성된 신초의 대부분 이 유리질화 되었다. 기내에서 국화묘의 생장은 광도 100 μmol·m-2·s-1 PPFD에서 신초의 길이와 엽록소 함량이 가장 높았다. Effect of plant growth regulators and light intensity on the shoot tip culture for virus free stock was investigated in chrysanthemum (Dendranthema grandiflorum) cv. Beckson. Multiple shoots from shoot tip cultures were induced on MS medium supplemented with 0.2 mg·L-1 NAA and 2.0 mg·L-1 kinetin. Subsequent growth of multiple shoots clump was much better on MS medium supplemented with 0.02 mg·L-1 NAA and 2.0 mg·L-1 kinetin. However, shoot tip cultures showed the greatest number of shoots (6.9 shoots) on MS medium with 0.2 mg·L-1 NAA and 1.0 mg·L-1 BA, but these shoots resulted to vitrification. When shoots were cultured under 100 μm m-2 s-1 photosynthetic photon flux density (PPFD), shoot length and chlorophyll content were more improved as compared to the others PPFD treatments.

광 및 CO2 변화 조건에서 브로콜리(Brassica oleracea var. italica)의 전기적 신호 모니터링

박진희,김한나 한국응용생명화학회 2021 Journal of Applied Biological Chemistry (J. Appl. Vol.64 No.4

환경 조건의 변화는 식물의 물과 양분 흡수 및 광합성 정도를변화시켜 결과적으로 식물 생육에 영향을 미친다. 변화하는 환경 조건에서 식물의 생리적 반응은 식물 줄기에 전극을 삽입해식물유도 전기신호(PIES)로 비파괴적으로 모니터링할 수 있다. 본 연구의 목적은 CO2 증가와 광합성 광량자속밀도 PPFD 감소에 따른 식물의 반응으로 PIES를 모니터링하는 것이다. PIES 는 증산과 광합성이 일어나는 낮에 증가하였고 식물 생육 기간동안 모니터링한 CO2 농도는 PIES와 음의 상관관계를 보였다. CO2 농도 증가는 PIES를 약간 감소시켰으나 PIES에 큰 영향을미치지 않았으며 이는 CO2 증가의 효과가 낮은 PPFD에 의해제한되었기 때문으로 판단된다. PPFD 감소의 효과는 물과 양분흡수가 광에 의해 즉각적으로 영향을 받지 않았기 때문에 즉시나타나지는 않았다. 본 연구는 CO2 증가와 PPFD 감소에 의한식물의 단기적 반응을 평가하고자 한 것이며 프롤린 함량 및 엽록소 형광은 환경 변화에 따라 유의하게 변화하지는 않았다. Changing environmental conditions can affect plant growth by influencing water and nutrient transport and photosynthesis. Plant physiological responses under changing environmental conditions can be non-destructively monitored using electrodes as plant induced electrical signal (PIES). Objective of the study was to monitor PIES in response to increased CO2 and decreased photosynthetic photon flux density (PPFD). The PIES increased during day time when transpiration and photosynthesis occurs and monitored CO2 concentration was negatively correlated to the PIES. Enhanced CO2 concentration slightly reduced PIES, but the effect of increased CO2 was limited by light intensity. The effect of reduced PPFD was not appeared immediately because water and nutrient transport was not promptly affected by the light. The study was conducted to evaluate short-term effect of increasing CO2 and decreasing PPFD, hence proline content and chlorophyll fluorescence was not significantly affected by the conditions.

Flowering, Growth and Photosynthetic Activity of Adonis amurensis Regel et Radd. in Response to Temperature and Photosynthetic Photon Flux Density

Hyun Hwan Jung,Ki Sun Kim 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Semicylindrical Column Photobioreactor for Cultivation of Spirulina platensis

Chang-Su Lee,Do-Wook Woo,Gyeong-In Lee,Jong-Hee Kwon 경상대학교 농업생명과학연구원 2020 농업생명과학연구 Vol.54 No.3

Microalgae and cyanobacteria are photosynthetic microorganism used as human nutrients. Light is the most important factor affecting the biomass accumulation and production of bioactive compound by photosynthetic microorganisms. However, excessive light can suppress their growth by damaging the photosynthetic machinery such as Photosystem II (PS2). Therefore, an LED-based illumination system that is used for cultivation of photosynthetic cells needs a device to appropriately regulate the light level, but the addition of an electronic dimmer increases the initial costs. Spirulina is one of the promising and representative photosynthetic microorganisms. In the present study, we describe the use of a new semicylindrical column photobioreactor for cultivation of Spirulina. The amount of incident light reaching the photobioreactor was easily adjusted by changing angle of the LED in relation to the flat surface of the bioreactor. Arrangement of the LED bar at a 45° angle led to the highest growth and chlorophyll content, and led to no retardation of cell growth during the initial growth phase.

LED 광원과 광도에 따른 참외의 묘소질 및 정식 후 생육 변화

이지은(Ji Eun Lee),신용습(Yong Seub Shin),도한우(Han Woo Do),정종도(Jong Do Cheung),강영화(Young Hwa Kang) (사)한국생물환경조절학회 2016 생물환경조절학회지 Vol.25 No.4

참외 육묘 시설 내에서 우수한 품질의 모종을 생산하기 위한 LED 광원의 이용 가능성을 검토하기 위해 접목 활착 후 20일 동안 광원과 광도를 달리하여 묘소질과 정식 후 생육을 비교하였다. 광원은 청색광(B), 적청색 혼합광원(RB3, RB7)을 이용하였고, 광도(PPFD)는 50, 100, 200μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP>로 처리하였다. 조명시간은 일출(7:30) 전 2시간과 일몰(17:30) 후 2시간씩 하루에 총 4시간을 처리하는 일장연장법을 이용하였다. 참외 지상부의 생장지표인 접수 길이와 줄기직경은 청색광의 비율이 높을수록 길어지고 굵어지는 경향을 나타내었다. 적청색 혼합광원(RB3)이 다른 광원들에 비해 건물률과 조직의 충실도가 높은 경향이었다. 광합성률은 적색광의 비율이 높을수록 증가하였으며, RB7 200μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP>처리구에서 5.44μ㏖CO₂·m<SUP>-2</SUP>·s<SUP>-1</SUP>로 가장 높았다. 정식 후 RB3 200μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP> 처리구의 초장이 132.3cm로 가장 길었고, 마디수가 22.7개로 가장 많았으며 개화율도 75%로 가장 높았다. 청색광(B) 단독으로 처리한 것보다는 적청색 혼합광원(RB3)으로 처리한 것이 묘소질을 양호하게 하였고, 광도를 200μ㏖·m-2·s-1로 높이는 것이 우량묘 생산에 유리할 것으로 판단되었다. This study was conducted to analyze the seedling quality of korean melon and the growth after transplanting of korean melon nursed under the LED sources. LED sources were RB7 (Red:Blue=14:2), RB3 (Red:Blue=12:4) and Blue(B=16). Photosynthetic photon flux density(PPFD) was 50, 100 and 200μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP>. The lighting treatment was started after graft-taken and was applied for 20 days at 4 hours(05:30 and 07:30, 17:30 and 19:30) per day. Plant height and stem diameter of scion were longer and thicker under a high ratio of blue light condition. Dry matter ratio and compactness were highest in RB3 compared to the other LED sources treatments. CO₂ exchange rate increased 5.44μ㏖CO₂·m<SUP>-2</SUP>·s<SUP>-1</SUP> under RB7 200μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP> and dropped to negative values under control. PPFD 200μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP> of RB3 resulted in the longest plant height by 132.3㎝ and flowering ratio also was the highest by 75%.

Semicylindrical Column Photobioreactor for Cultivation of Spirulina platensis

이창수,우도욱,이경인,권종희 경상국립대학교 농업생명과학연구원 2020 농업생명과학연구 Vol.54 No.3

Microalgae and cyanobacteria are photosynthetic microorganism used as human nutrients. Light is the most important factor affecting the biomass accumulation and production of bioactive compound by photosynthetic microorganisms. However, excessive light can suppress their growth by damaging the photosynthetic machinery such as Photosystem II (PS2). Therefore, an LED-based illumination system that is used for cultivation of photosynthetic cells needs a device to appropriately regulate the light level, but the addition of an electronic dimmer increases the initial costs. Spirulina is one of the promising and representative photosynthetic microorganisms. In the present study, we describe the use of a new semicylindrical column photobioreactor for cultivation of Spirulina. The amount of incident light reaching the photobioreactor was easily adjusted by changing angle of the LED in relation to the flat surface of the bioreactor. Arrangement of the LED bar at a 45° angle led to the highest growth and chlorophyll content, and led to no retardation of cell growth during the initial growth phase.

영농형 태양광 시설 하부의 미기상 관측 자료: 보성에서 2019년 11월부터 2020년 5월까지 가을보리 재배기간 동안

조유나,윤창용,김현기,문현동,안규남,조재일 한국농림기상학회 2020 한국농림기상학회지 Vol.22 No.3

Agrivoltaic systems (AVS) is defined as combining farm-grown crops with photovoltaic panels (PV) installed several meters above the g round. Solar radiation (W /m2), photosynthetic photon flux density (PPFD, μmol/m2/s), air temperature (℃), vapor pressure (kPa), soil moisture (m3/m3), soil temperature (℃), wind direction (˚), and wind speed (m/s) were measured under the AVS in Boseong-gun during winter barley season. Data was collected by 5 minute interval. All data can download at Github site (https://github.com/chojaeil/AVS_Boseung). To gap-filling missing solar radiation data during about two weeks, the conversion coefficient from solar radiation to PPFD was estimated as 0.41. Further, according to the ratio of diffuse radiation to direct radiation, the maximum value among the twenty PPFD sensors under the AVS was related to the PPFD value of filed. 작물을 재배하는 동시에 전력 생산도 가능한 영농형 태양광 발전은 농업⋅농촌 분야와 재생에너지 산업 모두로부터 주목 받고 있다. 하지만, 그 역사가 짧은만큼 영농형 태양광 하부에서의 미기상 환경 변화에 대한 이해와 관측 방법론이 정립되지 않은 실정이다. 따라서 본고에서는 보성군에 설치된 영농형 태양광에서 2019년 11월 부터 2020년 5월까지의 보리 생육기간 동안 일사광, 광합성유효복사광, 기온, 습도, 토양습도⋅온도, 풍향⋅풍속을 5분 간격으로 측정하여 공개했다. 또한, 노지의 일사량 및 광합성유효복사량에 대한 약 13일 간의 자료 결손에 대해서는 가까운 기상청 관측 자료를 활용하거나 영농형 태양광 하부의 자료를 이용한 두 가지 경험적 메우기 방법을 제안하였다. 본고 자료가 영농형 태양광에 대한 농업적 평가에 다양하게 활용되기를 기대한다

Illuminance Distribution and Photosynthetic Photon Flux Density Characteristics of LED Lighting with Periodic Lattice Arrangements

Jeon, Hee-Jae,Ju, Kang-Sig,Joo, Jai-Hwang,Kim, Hyun-Gyun The Korean Institute of Electrical and Electronic 2012 Transactions on Electrical and Electronic Material Vol.13 No.1

LED lighting systems that combine lighting capability, emotional and physiological characteristics are required for lighting source and multifunctional applications. In this work, Simulation studies using optical analysis software packages, Light Tools, are presented. This is done to estimate the uniformity ratio of illuminance and photosynthetic photon flux density (PPFD) of the periodic 2D lattice arrangements, such as square, diamond, two-way bias quadrangular, hexagonal, and Kagome lattices, under the same transmissivity, absorptance and reflectivity. It has been found out that the two-dimensional Kagome lattice arrangement exhibited high uniformity ratio of illuminance and PPFD compared to other lattices. Accordingly, these results can be used to guide a design and improve the lighting environment which in turn would maximize the uniform distributions of illuminance.

Illuminance Distribution and Photosynthetic Photon Flux Density Characteristics of LED Lighting with Periodic Lattice Arrangements

전희재,주재황,주강식,Hyun-Gyun Kim 한국전기전자재료학회 2012 Transactions on Electrical and Electronic Material Vol.13 No.1

LED lighting systems that combine lighting capability, emotional and physiological characteristics are required for lighting source and multifunctional applications. In this work, Simulation studies using optical analysis software packages, Light Tools, are presented. This is done to estimate the uniformity ratio of illuminance and photosynthetic photon flux density (PPFD) of the periodic 2D lattice arrangements, such as square, diamond, two-way bias quadrangular, hexagonal, and Kagome lattices, under the same transmissivity, absorptance and reflectivity. It has been found out that the two-dimensional Kagome lattice arrangement exhibited high uniformity ratio of illuminance and PPFD compared to other lattices. Accordingly, these results can be used to guide a design and improve the lighting environment which in turn would maximize the uniform distributions of illuminance.

Effects of LED Light Quality of Urban Agricultural Plant Factories on the Growth of Daughter Plants of ‘Seolhyang’ Strawberry

( Kook-han Lee ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.10

This study was conducted to examine the influence of Light-Emitting Diode (LED) light quality in urban agricultural plant factories on the growth and development of Seolhyang strawberry daughter plants in order to improve the efficiency of daughter plant growth and urban agriculture. LED light quality by demonstrated that above-ground growth and development were greatest for daughter plant 2. Daughter plant 1 showed the next highest growth and development, followed by daughter plant 3. Among the different qualities of LED light, the stem was thickest and growth rate of leaves was highest for R + B III (LED quality: red 660 nm + blue 450 nm/photosynthetic photon flux density (PPFD): 241-243 μmol·m^-2·s^-1) and lowest for R (red 660 nm/115-117 μ mol·m^-2·s^-1). Plant height, leaf width, petiole length, and the leaf growth rate were highest for W (white fluorescent lamp/241-243 μ mol·m^-2·s^-1) and lowest for R + B Ⅰ (red 660 nm + blue 450 nm/80-82 μ㏖·m^-2·s^-1). For above-ground growth and development, as the plants surpassed the seedling age, mixed light (red + blue), rather than monochromatic light (red or blue), and higher PPFD values tended to increase development. Regarding the quality of the LED light, daughter plant 2 showed the highest chlorophyll content, followed by daughter plant 1, and daughter plant 3 showed the least chlorophyll content. When the wavelength was monochromatic, chlorophyll content increased, compared to that when PPFD values were increased. Mixed light vitality was highest in daughter plant 2, followed by 1, and 3, showed increased photosynthesis when PPFD values were high with mixed light, in contrast to the results observed for chlorophyll content.