TABLE 2.

Effect of supplemental LED light duration on root parameters of cucumber.

Treatment	Main-root length (cm)	Root volume (cm3)	Root activity (μg⋅g–1⋅h–1)
Control	29.50 ± 0.98c	3.62 ± 0.22c	97.70 ± 6.79c
T1	31.33 ± 1.53bc	4.02 ± 0.48bc	132.52 ± 7.32b
T2	33.70 ± 0.97ab	4.31 ± 0.36b	141.07 ± 4.40ab
T3	36.03 ± 2.13a	4.75 ± 0.26a	152.37 ± 8.75a

Values are expressed as mean ± SE (n = 3). Bars that are significantly different based on the Duncan’s multiple range test (p < 0.05) are indicated with different lowercase letters.