Exposure to exogenous ethylene. To identify
cultivar differences in sensitivity to ethylene,
excised inflorescences were exposed to
exogenous ethylene. Inflorescences were harvested
and immediately placed into beakers
with deionized water. Fully opened florets
(with the stigmatic lobes fully reflexed) and
flower buds were removed in order to obtain
only young morphologically similar florets
from each cultivar.