this could be
related to the level of ethylene sensitivity. Furthermore,
exogenous ethylene reduced the vase life of orchid
hybrids between 31 to 70% in D. ‘Darren Glory’ and D.
‘Sonia Bom’, respectively. In addition, interaction between
hybrids and ethylene treatments on vase life was
significant, indicating different sensitivities to ethylene.
However, the reduction of vase life percentage could not
be considered as a sufficient criterion to indicate the
ethylene sensitivity because a hybrid like D. ‘Darren
Glory’ had only 30% reduction vase life but it had the
shortest vase life and highest ethylene production.
Yellowing, drooping, epinasty and venation of florets
were major observable signs of senescence (Lerslerwong
and Ketsa, 2008). Anthocyanin content was reduced in
these cut Dendrobium flowers exposed to ethylene.