Fig. 4

Boxplots of traits measured at harvest in the four light quality treatments. F, fluorescent light; FM, 10 days in fluorescent light, then shift to metal halide light; M, metal halide light; MF, 10 days in metal halide, then shift to fluorescent conditions. In each box plot (n = 44), the mean is represented with a black diamond; the horizontal bar splitting the box represents the median; the height of the box represents the interquartile range, and the whiskers length represent 1.5 times of the interquartile range. From top to bottom, and left to right: number of nodes in the main stem; length of last internode of main stem in cm; length of the main spike in cm; number of spikelets per main spike; number of seeds in the main spike; individual seed weight (g) in the main spike; number of reproductive tillers per plant; total number of seeds per plant; and total seed weight per plant. Results derived from 4 plants per variety, 11 varieties. Different letters represent significant differences between treatments in a post-hoc LSD-test, for a P-value < 0.05