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Flowering of Aeschynanthus `Koral' at Fluctuating and Constant Temperatures

1990; American Society for Horticultural Science; Volume: 115; Issue: 6 Linguagem: Inglês

10.21273/jashs.115.6.906

2327-9788

Brooks Whitton, Will Healy, Mark S. Roh,

Plant and animal studies

Stock plants of Aeschynanthus `Koral' were grown with irradiances of 120 or 240 μmol·s -1 ·m -2 at 18/17, 24/17, or 30/17C (day/night) under 12-hour thermo- and photoperiods. Tip cuttings from stock plants grown at 18/17C flowered earlier than those from stock plants grown at 24/17 or 30/17C when cuttings were forced in a glasshouse under natural days (23/18 C). No cuttings from stock plants grown at 30/17C reached the visible bud stage after 86 days, while 93% of the cuttings forced at 18/17C did reach the visible bud stage. A. `Koral' plants were grown at 18, 24, or 30C in a factorial combination of temperatures at 12-hour thermo- and photoperiods (100 μmol·s -1 ·m -2 ). After 8 weeks, only plants grown at 18/18C had visible buds. After 18 weeks, plants grown at 24/24 or 24/18C had visible buds after having unfolded =2.5 times as many leaves as plants grown at 18/18C. Rapid flowering of A. `Koral' is promoted by constant 18C under a 12-hour photoperiod.