The present study investigated the floral scent pattern and intensity of the floral organs in various species and cultivars of Maxillaria at different flowering stages using an electronic nose with 6 metal oxide sensors. The scents of species and cultivars showed various patterns overall, especially that of M. tenuifolia. The scent patterns of cultivars derived from M. variabillis formed a clustere that differed greatly from the origin M. variabillis. In M. tenuifolia, the scent pattern differed by stage, and was strongest at the initial flowering stage. Each floral organ showed different scent patterns; the sepal emitted the strong scent of all floral organs. This study establishes baseline data for the analysis scent of Maxillaria scents and for breeding aromatic orchids.

Introduction
 Materials and methods
  Plant materials and collection of volatilecompounds
  Pattern analysis of flowering stages and floralorgans in M. tenuifolia
  E-nose system analysis
 Results and discussion
  Floral scent pattern of cultivars
  Floral scent pattern of flowering stage inM. tenuifolia
  Floral scent pattern of the floral organs inM. tenuifolia
 References

• Su Yeoung Kim(Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea, Department of Horticultural Science, Chungbuk National University, Cheongju 28644, Korea)
• Hye Ryun An(Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea)
• Pil Man Park(Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea)
• Yun Su Baek(Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea)
• Oh Keun Kwon(Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea)
• So-Young Park(Department of Horticultural Science, Chungbuk National University, Cheongju 28644, Korea)
• Pue Hee Park(Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration, Wanju 55365, Korea) Corresponding author