Table II.

Organization of flowering axillary shoots

TreatmentNo. of Axillary StructuresReversion in Terminal Flowers
TotalInflorescence or shootType-2 flowerRudimentary flower
%
13 SD + LD4.9  ± 0.362.6  ± 0.122.1  ± 0.340.6  ± 0.7289
15 SD + LD5.2  ± 0.302.8  ± 0.092.2  ± 0.250.9  ± 0.9690
18 SD + LD5.0  ± 0.313.0  ± 0.111.8  ± 0.270.4  ± 0.5565
Control4.1  ± 0.082.9  ± 0.061.2  ± 0.080.1  ± 0.390

Plants were grown under SD conditions for different periods (13, 15, and 18 d) and transferred to LD conditions. Control plants were grown under continuous SD conditions until maturity. Flowering axillary shoots (38, 39, and 41, respectively) from 10 plants were dissected for the 13 SD + LD, 15 SD + LD, and 18 SD + LD treatments. Sixty-nine flowering axillary shoots from 14 control SD plants were analyzed. The number and type of axillary structures borne on each shoot were recorded (axillary shoots and inflorescences and type-2 flowers). Rudimentary type-2 flowers corresponded in most cases to one or two sepals and less frequently to a filament. The percentage of reversion in the terminal flowers of axillary shoots was recorded in 36, 30, 31, and 52 axillary shoots in the 13 SD + LD, 15 SD + LD, 18 SD + LD, and control treatments, respectively. Data are ±se.