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2021 Vol.30, Issue 4 Preview Page

Original Articles

Comparison of Measured and Calculated Carboxylation Rate, Electron Transfer Rate and Photosynthesis Rate Response to Different Light Intensity and Leaf Temperature in Semi-closed Greenhouse with Carbon Dioxide Fertilization for Tomato Cultivation

반밀폐형 온실 내에서 탄산가스 시비에 따른 광강도와 엽온에 반응한 토마토 잎의 최대 카복실화율, 전자전달율 및 광합성율 실측값과 모델링 방정식에 의한 예측값의 비교

Eun-Young Choi1
,
Young-Ae Jeong2
,
Seung-Hyun An3
,
Dong-Cheol Jang4
,
Dae-Hyun Kim5
,
Dong-Soo Lee6
,
Jin-Kyung Kwon7
,
Young-Hoe Woo8*
최 은영1
,
정 영애2
,
안 승현3
,
장 동철4
,
김 대현5
,
이 동수6
,
권 진경7
,
우 영회8*
1Professor, Department of Agricultural Science, Korea National Open University, Seoul 03087, Korea
2Graduate Student, Department of Agriculture and Life Science, Korea National Open University, Seoul 03087, Korea
3Undergraduate Student, Department of Agricultural Science, Korea National Open University, Seoul 03087, Korea
4Postdoctoral Researcher, Department of Horticulture, College of Agriculture and Life Science, Kangwon National University, Chuncheon 24341, Korea
5Professor, Department of Biosystems Engineering, College of Agriculture and Life Science, Kangwon National University, Chuncheon 24341, Korea
6Postdoctoral Researcher, Department of Agricultural Engineering, Energy and Environmental Engineering Division, Jeonju 54875, Korea
7Researcher, Department of Agricultural Engineering, Energy and Environmental Engineering Division, Jeonju 54875, Korea
8Professor, Department of Horticulture Environment System, Korea National College of Agriculture and Fisheries, Jeonju 54874, Korea
1한국방송통신대학교 농학과 교수
2한국방송통신대학교 대학원 농생명과학과 대학원생
3한국방송통신대학교 농학과 학부생
4강원대학교 원예학과 박사후연구원
5강원대학교 에너지공학과 교수
6농촌진흥청 농업과학원 박사후연구원
7농촌진흥청 농업과학원 연구사
8한국농수산대학 원예환경시스템학과 교수
*Corresponding Author
31 October 2021. pp. 401-409
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Abstract

This study aimed to estimate the photosynthetic capacity of tomato plants grown in a semi-closed greenhouse using temperature response models of plant photosynthesis by calculating the ribulose 1,5-bisphosphate carboxylase/ oxygenase maximum carboxylation rate (Vcmax), maximum electron transport rate (Jmax), thermal breakdown (high- temperature inhibition), and leaf respiration to predict the optimal conditions of the CO2-controlled greenhouse, for maximizing the photosynthetic rate. Gas exchange measurements for the A-Ci curve response to CO2 level with different light intensities {PAR (Photosynthetically Active Radiation) 200µmol·m-2·s-1 to 1500µmol·m-2·s-1} and leaf temperatures (20°C to 35°C) were conducted with a portable infrared gas analyzer system. Arrhenius function, net CO2 assimilation (An), thermal breakdown, and daylight leaf respiration (Rd) were also calculated using the modeling equation. Estimated Jmax, An, Arrhenius function value, and thermal breakdown decreased in response to increased leaf temperature (> 30°C), and the optimum leaf temperature for the estimated Jmax was 30°C. The CO2 saturation point of the fifth leaf from the apical region was reached at 600ppm for 200 and 400µmol·m-2·s-1 of PAR, at 800ppm for 600 and 800µmol·m-2·s-1 of PAR, at 1000ppm for 1000µmol of PAR, and at 1500ppm for 1200 and 1500µmol·m-2·s-1 of PAR levels. The results suggest that the optimal conditions of CO2 concentration can be determined, using the photosynthetic model equation, to improve the photosynthetic rates of fruit vegetables grown in greenhouses.

Keywords
Arrhenius function
net CO2 assimilatio
rubisco
saturation point
thermal breakdown

본 연구는 반밀폐형 토마토 재배 온실에서 광합성율 극대화를 위한 적정 탄산가스 시비 농도를 구명하고자 광합성 모델을 이용하여 잎의 최대 카복실화율(Vcmax), 최대 전자전달속도(Jmax), 열파괴, 잎 호흡 등을 계산하고 실제 측정값과 비교하였다. 다양한 광도(PAR 200µmol·m-2·s-1 to 1500µmol·m-2·s-1)와 온도(20°C to 35°C) 조건에서 CO2 농도에 대한 A-Ci curve는 광합성 측정 기기를 사용하여 측정하였고, 모델링 방정식으로 아레니우스 함수값(Arrhenius function), 순광합성율(net CO2 assimilation, An), 열파괴(thermal breakdown), Rd(주간의 잎호흡)를 계산하였다. 엽온이 30°C 이상으로 상승하였을 때 Jmax, An 및 thermal breakdown 예측치가 모두 감소하였고, 예측 Jmax의 가장 최고점은 엽온 30°C였으며 그 이상의 온도에서는 감소하였다. 생장점 아래 5번째 잎의 광합성율은 PAR 200－400µmol·m-2·s-1 수준에서는 CO2 600ppm, PAR 600－800µmol·m-2·s-1 수준에서는 CO2 800ppm, PAR 1000µmol·m-2·s-1 수준에서는 CO2 1000ppm, PAR 1200－1500µmol·m-2·s-1 수준에서는 CO2 1500ppm을 공급했을 때 포화점에 도달하였다. 앞으로 광합성 모델식을 활용하여 과채류 온실 재배 시 광합성을 높일 수 있는 탄산시비 농도를 추정할 수 있을 것으로 판단된다.

키워드
아레니우스 방정식
순광합성
루비스코
포화점
열파괴
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Journal of Bio-Environment Control
  • Journal Title(Ko) :생물환경조절학회지
  • Volume : 30
  • No :4
  • Pages :401-409
  • Received Date : 2021-09-24
  • Revised Date : 2021-10-16
  • Accepted Date : 2021-10-25
  • An Erratum to this article was published on 31 January 2022.
    This article has been updated.
  • DOI :https://doi.org/10.12791/KSBEC.2021.30.4.401
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