Horticulture, Environment, and Biotechnology

, Volume 57, Issue 1, pp 20–26 | Cite as

Development of a coupled photosynthetic model of sweet basil hydroponically grown in plant factories

  • Kyoung Sub Park
  • Khoshimkhujaev Bekhzod
  • Joon Kook Kwon
  • Jung Eek Son
Research Report Protected Horticulture


For the production of plants in controlled environments such as greenhouses and plant factories, crop modeling and simulations are effective tools for configuring the optimal growth environment. The objective of this study was to develop a coupled photosynthetic model of sweet basil (Ocimum basilicum L.) reflecting plant factory conditions. Light response curves were generated using photosynthetic models such as negative exponential, rectangular hyperbola, and non-rectangular hyperbola functions. The light saturation and compensation points determined by regression analysis of light curves using modified non-rectangular hyperbola function in sweet basil leaves were 545.3 and 26.5 µmol·m-2·s-1, respectively. The non-rectangular hyperbola was the most accurate with complicated parameters, whereas the negative exponential was more accurate than the rectangular hyperbola and could more easily acquire the parameters of the light response curves of sweet basil compared to the non-rectangular hyperbola. The CO2 saturation and compensation points determined by regression analysis of the A-Ci curve were 728.8 and 85.1 µmol·mol-1, respectively. A coupled biochemical model of photosynthesis was adopted to simultaneously predict the photosynthesis, stomatal conductance, transpiration, and temperature of sweet basil leaves. The photosynthetic parameters, maximum carboxylation rate, potential rate of electron transport, and rate of triose phosphate utilization determined by Sharkey’s regression method were 102.6, 117.7, and 7.4 µmol·m-2·s-1, respectively. Although the A-Ci regression curve of the negative exponential had higher accuracy than the biochemical model, the coupled biochemical model enable to physiologically explain the photosynthesis of sweet basil leaves.

Additional key words

negative exponential non-rectangular hyperbola Ocimum basilicum L. transpiration 


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Copyright information

© Korean Society for Horticultural Science and Springer-Verlag GmbH 2016

Authors and Affiliations

  • Kyoung Sub Park
    • 1
    • 2
  • Khoshimkhujaev Bekhzod
    • 1
  • Joon Kook Kwon
    • 1
  • Jung Eek Son
    • 2
  1. 1.Protected Horticulture Research InstituteNational Institute of Horticultural and Herbal ScienceGyeonsangnam-doKorea
  2. 2.Department of Plant Science and Research Institute of Agriculture and Life SciencesSeoul National UniversitySeoulKorea

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