Gibberellins and temperature
influenced sugar content and so flowering in
Phalaenopsis (Chen et al. 1994) as sugars are signals that
could take part in growth and morphogenesis (Bernier
et al. 1993). However, Sakanishi et al. (1980) reported
that low temperature treatments (using day/night
temperatures of 25/15 and 25/10 °C) did not promote the
formation of floral buds and suggested that the conditions
for the induction of floral buds in Phalaenopsis in vitro
might be different from those in vivo (Duan and Yazawa
1995). Vaz et al. (2004) reported that an orchid
Psygmorchis pusilla maintained at 24 or 30 °C had
similar flowering responses, 27 °C being the most
adequate; in addition, within the temperature range of
24 to 30 °C, the higher the temperature, the earlier flower
buds wilting occurred