Three thermal regimes, with slightly
different day/night values, were compared during the 60-day phase
of flower induction (from December 28 to February 28): 21/19 ◦C
(RT), the thermal regime commonly adopted by growers taken as
the reference temperature; 23/21 ◦C (moderately higher temperature,
HT); 19/17 ◦C (moderately lower temperature, LT).