FIGURE 6.

Effects of supplemental LED light duration on the activities of key enzymes of Calvin cycle: ribulose diphosphate carboxylase/oxygenase (A), fructose-1,6-bisphosphonate (B), transketolase (C), glyceraldehyde-3-phosphate dehydrogenase (D), and fructose-1, 6-bisphosphate aldolase (E) in cucumber leaves. After LED light supplement treatment for 30 days, 10 pieces of the third leaf from the top of cucumber were selected from each treatment, washed and dried immediately, and then put into liquid nitrogen to prepare for the determination of activities of the key enzymes in the Calvin cycle. 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.