Molecular cloning and expression analysis of a new lily-type lectin in
the rock bream, Oplegnathus fasciatus
Optimal photoperiod and floral transition of Eustoma grandiflorum
‘Tiramisu Double Cream’
Methyl jasmonate treatment promotes flower opening of cut Eustoma by
inducing cell wall loosening proteins in petals
a b s t r a c t
The aim ofthis study was to further our current knowledge of photoperiodic flowering traits in lisianthus.
The effects of the photoperiod on the flowering traits of Eustoma grandiflorum ‘Tiramisu Double Cream’
(TDC) were investigated under 7 day-length treatments. TDC was deduced to be a facultative long-day
plant, of which the critical day-length for flowering was 14 h. Compared with short-days, high flowering
quality was available under day-lengths of 14 h and above, with no significant difference between
long-days, except 24 h. Thus, the optimal photoperiod that promotes the flowering of TDC was the 14 h
day-length. The floral transition in TDC was estimated through the identification of the floral bud differentiation
phase (DP) and its correlation with vegetative growth traits (VGTs). The results show that the
floral bud differentiation of TDC lasted approximately 3 weeks and was divided into 6 phases. The floral
transition in TDC was distinguished before the appearance of sepal primordia. Significant correlations
existed between DPs and VGTs, and the regression equations suggested that the floral transition of TDC
occurred at the 21-leaf stage. Therefore, it is recommended that TDC be planted under a day-length of
14 h before the 21-leaf stage to promote flowering.