The results indicated that different hybrids showed
distinct variances in ethylene sensitivities and degrees of deterioration. Dendrobium ‘Darren Glory’ and
D. ‘Jaquelyne Concert’ × D. ‘Rinappa’ exhibited the utmost hyponasty, weight loss and degradation of
anthocyanin content in sepals and petals. Thus, these two hybrids were categorized as the very
sensitive group. On the other hand, D. ‘Sonia Red’, D. ‘Shavin White’, D. ‘Sonia White’ and D. ‘Sonia
Bom’ showed lower sensitivity and hence were categorized in the less sensitive group. The results of
this experiment and similar experiments to determine the resistant and susceptible cultivars to ethylene
injury can be helpful in improving the postharvest life of cut orchid flowers.