CO2 Uptake Behavior and Vegetative Growth of Doritaenopsis Queen Beer‘Mantefon’Orchids as Influenced by Light/Dark Cycle Manipulation

서지정보

ㆍ발행기관 : 한국화훼학회 ㆍ수록지정보 : 화훼연구 / 25권 / 4호
ㆍ저자명 : Hyo Jin Kim, Ju Hui Lee, Hyo Beom Lee, Seong Kwang An, Ki Sun Kim

목차

Introduction
Materials and Methods
Plant and growth conditions
Photoperiod and temperature treatments
Data collection and statistics
Results and Discussion
Effects of light/dark cycle manipulation on CO2uptake patterns
Effects of light/dark cycle manipulation onvegetative growth
References

영어 초록

This study was performed to investigate how changing the period of light and dark influences the vegetative growth and the photosynthesis of Doritaenopsis Queen Beer ‘Mantefon’. Clones of Dtps. Queen Beer ‘Mantefon’ at 4-month-old stage were grown in a closed-plant factory system with four different light/dark cycles; 06/06 h, 08/08 h, 10/10 h, and 12/12 h. Temperature and relative humidity were set at 28oC and 80%, respectively, with a photosynthetic photon flux density of 160 ± 10 μmol·m-2·s-1. Repetitive measurements showed that the leaf length and the leaf width were the longest under 12/12 h closely followed by 10/10 h. The fresh weight and the dry weight of leaves and roots were the heaviest at 10/10 h treated samples. Different CO2 uptake patterns were observed from different light/dark cycles. Under 10/10 h and 12/12 h treatments, the CO2 uptake started at early dark period. When the light/dark cycles were shortened to 06/06 h and 08/08 h, the CO2 uptake started at the middle of dark period. Total CO2 uptake amounts were the highest under 12/12 h treatment followed by 10/10 h, 06/06 h, and 08/08 h treatments. Quantitative measurements showed that the vegetative growths under 10/10 h treatment were comparable with that of 12/12 h treatment. These studies indicated that manipulating light/dark can modify the photosynthesis patterns and vegetative growth of Dtps. Queen Beer ‘Mantefon’, resulting in the reduction of the production period.

참고 자료

없음