flowering were obtained
on shoots of different heights from the same
multiplication media. This may be because those shoots
had a different physiological status or stage whereas
different percentages of in vitro flowering obtained on
shoots of the same height from different subculture media
may be due to different levels of endogenous phytohormones
or other unknown substances in those shoots.
The rationale is that some types of compounds, for
example proline, can induce flowering together with
hormones (Saxena et al. 2008).