TABLE 3.
The effects of UV-PFD (μmol⋅m–2⋅s–1) applied during the flowering stage on aboveground tissue moisture content (%), stem dry weight (DW; g⋅m–2), and cannabinoid and terpene concentrations [mg⋅g–1(DW)] in the mature, air-dried apical inflorescence tissues of Cannabis sativa ‘Low Tide’ and ‘Breaking Wave.’
| Parameter | ‘Low Tide’ |
‘Breaking Wave’ |
||
| Regression equationz, R2 or mean ± SDy | P-value | Regression equation, R2 or mean ± SD | P-value | |
| Inflorescence moisture content | 79.0 ± 1.27 | 0.14 | 79.3 ± 1.01 | 0.37 |
| Leaf moisture content | 69.5 ± 3.59 | 0.94 | 72.0 ± 2.31 | 0.28 |
| Stem moisture content | 72.4 ± 2.93 | 0.77 | 74.5 ± 2.17 | 0.41 |
| Stem DW | 49.2 ± 26.5 | 0.44 | 46.1 ± 21.6 | 0.16 |
| Δ9-tetrahydrocannabinol (Δ9-THC) | 1.66 ± 0.347 | 0.18 | y = 1.02x + 1.4, 0.33 | 0.013 |
| Δ9-THC acid (Δ9-THCA) | y = −15.9x + 84, 0.29 | 0.020 | 73.8 ± 12.2 | 0.91 |
| Cannabidiol (CBD) | 1.38 ± 0.447 | 0.56 | 1.47 ± 0.338 | 0.12 |
| CBD acid (CBDA) | y = −33.9x + 130, 0.43 | 0.0032 | 93.8 ± 13.8 | 0.46 |
| Cannabigerol (CBG) | 0.657 ± 0.275 | 0.57 | 1.27 ± 0.217 | 0.85 |
| CBG acid (CBGA) | y = −3.31x + 8.6, 0.58 | 0.0003 | 6.04 ± 1.07 | 0.82 |
| Δ9-THCeq:CBDeqx | 0.678 ± 0.0387 | 0.18 | y = 0.0980x + 0.76, 0.26 | 0.030 |
| Cannabinol (CBN) | UDLw | − | UDL | − |
| Alpha pinene | UDL | − | 0.214 ± 0.0593 | 0.91 |
| Beta pinene | 0.235 ± 0.0672 | 0.37 | 0.440 ± 0.124 | 0.067 |
| Myrcene | y = −4.16x + 6.2, 0.38 | 0.0089 | y = −2.47x + 3.5, 0.36 | 0.0082 |
| Limonene | y = −0.788x + 1.3, 0.34 | 0.014 | 1.57 ± 0.423, | 0.058 |
| Linalool | 0.274 ± 0.0703 | 0.27 | y = −0.147x + 0.22, 0.53 | 0.0010 |
| Terpineol | 0.254 ± 0.0655 | 0.32 | 0.379 ± 0.108 | 0.26 |
| Caryophyllene | 2.42 ± 0.746 | 0.28 | y = 0.520x + 1.1, 0.35 | 0.0092 |
| Humulene | 0.892 ± 0.324 | 0.42 | 0.403 ± 0.0842 | 0.39 |
| Fenchol | y = −0.118x + 0.22, 0.32 | 0.018 | 0.257 ± 0.0653 | 0.52 |
| Guaiol | 0.801 ± 0.100 | 0.17 | y = 0.251x + 0.46, 0.31 | 0.016 |
| Alpha-bisabolol | 0.677 ± 0.181 | 0.26 | 0.355 ± 0.104 | 0.14 |
| Total terpenes | y = −7.25x + 14, 0.38 | 0.0081 | y = −2.72x + 9.2, 0.22 | 0.049 |
zParameters with UV treatment effects (P ≤ 0.05) are presented as equations and R2.
yMeans ± SD are presented for parameters without UV treatment effects.
xThe total equivalent cannabinoids are annotated with: eq, where Δ9-THCeq = (Δ9-THCA × 0.877) + Δ9-THC, CBDeq = (CBDA × 0.877) + CBD.
wUnder detection limit of 0.5 mg⋅g–1 of inflorescence DW.