African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

CO2 uptake patterns in Phalaenopsis amabilis

Chiachung Chen1* and Rey-Song Lin2
  1Department of Bio-industrial Mechatronics Engineering, National ChungHsing University, 250 Kuokuang Road, Taichung Taiwan. 2Department of Horticulture, National ChungHsing University, 250 Kuokuang Road, Taichung Taiwan.
Email: [email protected]

  •  Accepted: 30 November 2011
  •  Published: 31 January 2012



A whole-plant open-system chamber was developed to measure COexchange in Phalaenopsis amabilis. The consistent and continuous curves of COgas exchange rhythms at various conditions, sampled at 1-min interval, were used to evaluate the factors affecting on the CO2 exchange pattern. The influencing factors included the day/night temperature, sample size, light period, light intensity and water stress. The adequate growth conditions of P.  amabilis were 26 to 30°C day temperature, 20 to 22°C night temperature, 14 to 16 h light and 180 to 215 μmol m-2s-1 of light intensity. Water stress had the most significant effect on the CO2 exchange pattern. The gas exchange measurement system developed in this study is a useful and reliable measurement system for studying the physiological characteristics of Phalaenopsis varieties.


Key words: CO2 pattern, open-system, Phalaenopsis, CAM plant, water stress, light rhythms.