%Flowering (days to visible flower bud)
SD LD LL NB
B 100 (22.1
±
0.3 a) 0 (−) 0 (−) 0 (−)
R 100 (25.2
±
0.4 b) 0 (−) 0 (−) 0 (−)
B + R 100 (21.9
±
0.3 a) 0 (−) 0 (−) 0 (−)
Plants were grown under various photoperiods with monochromatic blue light (B),
monochromatic red light (R), or blue plus red light (B + R) for 5 weeks.
Light intensities were set to 90 mol m−2 s−1 (B + R = 45 mol m−2 s−1 each).
SD, short day (12L/12D); LD, long day (16L/8D); LL, continuous light; NB, night
break (12L/12D + 4-h NB). Data are represented as the mean
±
SE (n = 12). Values followed
by the same lower-case letter did not differ significantly (p < 0.05) by Tukey’s
honestly significant difference test.