Table 2.
Effect of LED lights and different storage times from 0 to 14 days on ascorbic acid, total phenols, and flavonoid (quercetin) concentrations in yellow, green, and red sweet pepper fresh-cuts at 7 °C.
| Fresh-Cuts | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| LED Lights and Storage Time (d) | Yellow Sweet Pepper | Green Sweet Pepper | Red Sweet Pepper | ||||||
| Ascorbic Acid Content (g kg−1) | Total Phenols (g kg−1) | Total Flavonoid (Quercetin Content) (g kg−1) | Ascorbic Acid Content (g kg−1) | Total Phenols (g kg−1) | Total Flavonoid (Quercetin Content) (g kg−1) | Ascorbic Acid Content (g kg−1) | Total Phenols (g kg−1) | Total Flavonoid (Quercetin Content) (g kg–1)] | |
| Red LED light x 0 day | 1.58 a+0.03 | 0.96 bc ± 0.09 | 0.028 c ± 0.03 | 1.98 a ± 0.06 | 0.72 bc ± 0.02 | 0.020 c ± 0.02 | 1.75 a ± 0.05 | 1.02 c ± 0.04 | 0.034 c ± 0.09 |
| Red LED light x 3 days | 1.57 a ± 0.09 | 1.01 b ± 0.03 | 0.043 a ± 0.12 | 1.96 a ± 0.04 | 1.02 a ± 0.04 | 0.030 b ± 0.06 | 1.73 a ± 0.02 | 1.26 b ± 0.09 | 0.036 c ± 0.02 |
| Red LED light x 7 days | 1.56 a ± 0.04 | 1.28 a ± 0.05 | 0.045 a ± 0.15 | 1.95 a ± 0.19 | 1.07 a ± 0.18 | 0.035 a ± 0.03 | 1.72 a ± 0.09 | 1.29 b ± 0.03 | 0.042 bc ± 0.11 |
| Red LED light x 11 days | 1.34 b ± 0.12 | 1.10 b ± 0.01 | 0.035 b ± 0.09 | 1.70 b ± 0.02 | 0.80 b ± 0.12 | 0.027 b ± 0.05 | 1.50 b ± 0.13 | 1.30 b ± 0.01 | 0.038 c ± 0.07 |
| Red LED light x 14 days | 1.26 bc ± 0.04 | 0.87 bc ± 0.11 | 0.032 bc ± 0.06 | 1.45 c ± 0.12 | 0.78 bc ± 0.02 | 0.029 b ± 0.03 | 1.23 c ± 0.01 | 1.01 c ± 0.21 | 0.035 c ± 0.14 |
| Blue LED light x 0 days | 1.58 a ± 0.03 | 0.96 bc ± 0.09 | 0.028 c ± 0.04 | 1.98 a ± 0.6 | 0.76 bc ± 0.02 | 0.021 c ± 0.04 | 1.75 a ± 0.05 | 1.02 c ± 0.04 | 0.034 c ± 0.01 |
| Blue LED light x 3 days | 1.33 b ± 0.15 | 0.94 bc ± 0.17 | 0.032 bc ± 0.25 | 1.94 a ± 0.16 | 0.98 ab ± 0.04 | 0.025 bc ± 0.01 | 1.73 a ± 0.19 | 1.55 a ± 0.010 | 0.050 b ± 0.05 |
| Blue LED light x 7 days | 1.32 b ± 0.02 | 0.84 bc ± 0.03 | 0.034 bc ± 0.02 | 1.69 b ± 0.08 | 0.80 b ± 0.15 | 0.028 b ± 0.09 | 1.75 a ± 0.12 | 1.60 a ± 0.08 | 0.064 a ± 0.12 |
| Blue LED light x 11 days | 1.21 c ± 0.13 | 0.67 c ± 0.12 | 0.035 b ± 0.04 | 1.44 c ± 0.01 | 0.79 b ± 0.16 | 0.027 b ± 0.01 | 1.70 a ± 0.14 | 1.63 a ± 0.04 | 0.067 a ± 0.16 |
| Blue LED light x 14 days | 1.20 c ± 0.095 | 0.56 cd ± 0.06 | 0.032 bc ± 0.01 | 1.30 cd ± 02 | 0.78 b ± 0.07 | 0.026 b ± 0.04 | 1.45 b ± 0.09 | 1.30 b ± 0.02 | 0.049 b ± 0.02 |
| White light x 0 days | 1.58 a ± 0.03 | 0.96 bc ± 0.09 | 0.028 c ± 0.01 | 1.98 a ± 0.06 | 0.72 bc ± 0.02 | 0.020 c ± 0.07 | 1.75 a ± 0.05 | 1.02 c ± 0.04 | 0.034 c ± 09 |
| White light x 3 days | 1.31 b ± 0.08 | 0.91 a ± 0.06 | 0.030 c ± 0.03 | 1.95 a ± 0.04 | 0.73 bc ± 0.03 | 0.021 c ± 0.02 | 1.72 a ± 0.18 | 1.24 b ± 0.08 | 0.033 c ± 0.14 |
| White light x 7 days | 1.26 c ± 0.02 | 0.75 c ± 0.11 | 0.030 c ± 0.04 | 1.43 c ± 0.08 | 0.74 bc ± 0.15 | 0.025 bc ± 0.06 | 1.24 c ± 0.12 | 1.26 b ± 0.01 | 0.034 c ± 0.09 |
| White light x 11 days | 1.20 c ± 0.01 | 0.52 d ± 0.05 | 0.030 c ± 0.17 | 1.38 cd ± 0.15 | 0.72 bc ± 0.08 | 0.025 bc ± 0.03 | 1.23 c ± 0.07 | 1.29 b ± 0.21 | 0.033 c ± 0.12 |
| White light x 14 days | 1.17 c ± 0.12 | 0.50 d ± 0.13 | 0.030 c ± 0.03 | 1.18 d ± 0.04 | 0.70 bc ± 0.02 | 0.021 c ± 0.08 | 1.10 cd ± 0.04 | 0.98 c ± 0.13 | 0.032 c ± 0.17 |
| Darkness x 0 days | 1.58 a ± 0.03 | 1.30 cd ± 02 | 0.028 c ± 0.02 | 1.98 a ± 0.06 | 0.72 bc ± 0.02 | 0.020 c ± 0.11 | 1.75 a ± 0.05 | 1.02 c ± 0.04 | 0.034 c ± 09 |
| Darkness x 3 days | 1.32 b ± 0.09 | 0.84 bc ± 0.02 | 0.029 c ± 0.19 | 1.92 a ± 0.03 | 0.65 c ± 0.03 | 0.020 c ± 0.03 | 1.23 c ± 0.10 | 0.98 c ± 0.17 | 0.032 c ± 0.01 |
| Darkness x 7 days | 1.16 c ± 0.15 | 0.52 d ± 0.17 | 0.030 c ± 0.03 | 1.31 cd ± 0.18 | 0.64 c ± 0.18 | 0.021 c ± 0.07 | 1.11 cd ± 0.17 | 0.96 c ± 0.04 | 0.030 cd ± 0.15 |
| Darkness x 11 days | 0.81 d ± 0.06 | 0.50 d ± 0.12 | 0.030 c ± 0.12 | 1.30 cd ± 0.01 | 0.42 d ± 0.04 | 0.025 bc ± 0.04 | 0.96 d ± 0.02 | 0.96 c ± 0.02 | 0.021 d ± 0.06 |
| Darkness x 14 days | 0.78 d ± 0.02 | 0.29 e ± 0.01 | 0.029 c ± 0.04 | 1.14 d ± 0.12 | 0.41 d ± 0.01 | 0.021 c ± 0.02 | 0.97 d ± 0.12 | 0.71 d ± 0.15 | 0.020 d ± 0.08 |
Values are mean ± standard deviation of ten replicates. Mean values with same alphabetic letters in a column for a specific parameter are not significantly different according to LSD tests (p < 0.05).