Cannabinoids Accumulation in Hemp (Cannabis sativa L.) Plants under LED Light Spectra and Their Discrete Role as a Stress Marker

Hemp adaptability through physiological and biochemical changes was studied under 10 LED light spectra natural in a controlled aeroponic system. Light treatments were imposed on 25 days aged seedlings for 16 h daily (300 µmol m?2 s?1) 20 days. Plant accumulated highest Cannabidiol (CBD) R7:B2:G1 treatment, with relatively higher photosynthetic rate lower reactive oxygen species, total phenol content, flavonoid DPPH radical scavenging capacity, antioxidant enzymatic activities. Tetrahydrocannabinol (THC) also at level white, R8:B2, less evidence of stress-modulated substances. These results indicated that CBD THC have no or little relation light-mediated abiotic stress hemp plants. On the contrary, Tetrahydrocannabinolic acid (THCA) R6:B2:G1:FR1 R5:B2:W2:FR1 treatment along However, Cannabidiolic (CBDA) substances traits. CBDA R8:B2 Besides, Greenlight influenced synthesis where FR UV-A (along green) play positive negative role this process. Overall, enhanced medicinal cannabinoids most, THCA as marker is more decisive plant than other attributed stress.