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. 2021 Jul 24;10(8):710. doi: 10.3390/biology10080710

Figure 6.

Figure 6

Effect of 20 days exposure to different LED spectra on Tetrahydrocannabinol (THC) (A), Tetrahydrocannabinolic acid (THCA) (B) Cannabidiol (CBD) (C), and Cannabidiolic acid (CBDA) (D) of hemp seedlings. Here and subsequent figures: L1, Natural light; L2, White; L3, R8:B2; L4, R7:B2:G1; L5, R7:B2:FR1; L6, R6:B2:G1:FR1; L7, R5:B2:W2:FR1; L8, R5:B2:G1:FR1:UV1; L9, R6:B2:FR1:UV1; L10, R4:B2:W2:FR1:UV1; L11, R2:B2:G2:W2:FR1:UV1. All treatments used a photosynthetic photon flux density of 300 µmol m−2 s−1. Vertical bars indicate mean ± SE of four replicates. Different letters indicate significant differences at p < 0.05.