Table I. Fresh weight of H. rhodopensis plants grown in the photoperiod or in darkness.

T0 are the unstressed controls at the beginning of the experiment. Asterisks indicate statistically significant differences from the T0 controls (**, P < 0.01) according to ANOVA with Tukey’s honestly significant difference posthoc test. Values are means ± sd of 10 individual plants each.

Parameter	Treatment/ Time Point
	T0 Controls	7 d of Light	30 d of Light	37 d of Light	7 d of Dark	30 d of Dark	30 d of Dark + 7 d of Light
Fresh weight (mg)	470 ± 80	580 ± 140	790 ± 110**	790 ± 160**	530 ± 200	610 ± 130**	630 ± 130**