This study was conducted to determine the applicability of the shoot growth model to cut roses grown at high temperatures. Two cultivars of cut roses, ‘Antique Curl’ and ‘Beast’, were cultivated in growth chambers set to night/day temperatures of 24/20°C for the control group and 32/28°C for the treatment group. The shoot growth model, which resulted in high coefficients of determination (R2 = 0.80 and 0.62, respectively, for ‘Antique Curl’ and ‘Beast’), was a good predictor of the decrease in the growth of rose shoots for both treatment groups. Although the model produced good results for both the control and treatment groups of ‘Antique Curl’, the accuracy of the model can be improved by using the modified leaf area at the harvest stage. From these results, the model was confirmed to perform well for predicting a decrease in productiveness and quality in cut roses cultivated during summer under high temperatures.

Abstract
 Introduction
 Materials and Methods
  Plant materials and growth environment
 Measurements
  Plant growth
  Model description
  Model validation
  Statistical analysis
 Results and Discussion
  Growth of cut roses under control and high temperature
  Application of the Shoot growth model of cut roses grown under high temperature
  Validation of the shoot growth using modified model
 Conclusion
 References

• Hyung Bin Park(Department of Environmental Horticulture, University of Seoul, Useful Plant Resources Center, Korea National Arboretum)
• Wan Soon Kim(Department of Environmental Horticulture, University of Seoul, Natural Science Research Institute, University of Seoul) Corresponding author