Table 1.
Comparison of levels of carotenoids and other vitamins in WT M37W corn and transgenic line L-1
| Corn line | M37W | L-1 | Conventionally bred corn (4) | Golden Rice 2 (14) |
|---|---|---|---|---|
| Lyc | 0 | 22.78 ± 2.56 | ND | ND |
| γ-Car | 0.09 ± 0.02 | 4.79 ± 1.08 | ND | ND |
| α-Car | 0.12 ± 0.05 | 7.26 ± 0.87 | ND | ND |
| β-Car | 0.35 ± 0.06 | 59.32 ± 3.65 | 1.65 | 31 |
| α-Cryptox | ND | 13.42 ± 2.0 | ND | ND |
| β-Cryptox | ND | 5.28 ± 0.84 | ND | ND |
| Lut | 0.57 ± 0.18 | 14.68 ± 2.16 | 11.36 | ND |
| Zeax | 0.32 ± 0.05 | 35.76 ± 4.35 | 8.187 | ND |
| CAR | 1.45 ± 0.21 | 163.29 ± 8.61 | 23.06 | 37 |
| Asc | 17.53 ± 2.90 | 106.94 ± 7.56 | — | — |
| Fol | 0.93 ± 0.32 | 1.94 ± 0.17 | — | — |
Values are micrograms per gram DW ± SD (n = 3–5 mature T3 seeds). Also compared are a corn line bred conventionally (4) and genetically engineered Golden Rice 2, expressing Zmpsy1 and PacrtI (14). Lyc, lycopene; γ-Car, γ-carotene; α-Car, α-carotene; β-Car, β-carotene; α-Cryptox, α-cryptoxanthin; β-Cryptox, β-cryptoxanthin; Lut, lutein and lutein epoxide; Zeax, zeaxanthin; CAR, total carotenoids; Asc, ascorbate; Fol, folate; ND, not determined.