2. Materials and methods
2.1. Plant materials
Inflorescences of Dendrobium cv. Khao Sanan (also called
cv. Wanna) were obtained from a commercial grower near
Bangkok. The inflorescences were brought to the laboratory
within 2 h after harvest. The second, third and fourth open flowers,
counted from the end of the stem, were excised from the
inflorescences. The pedicels were placed in 10mL vials containing
distilled water. All flowers were held in an air-conditioned
room, at 25◦C and 80% RH. The photon flux density was ca.
15molm−2 s−1.