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. 2022 Oct 5;13:984410. doi: 10.3389/fpls.2022.984410

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Copyright © 2022 Islam, Ryu, Rahman, Rana, Cheong, Wang, Lim, Hossain and Lim

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Effect of LED spectra on cannabidiol (CBD) (A), cannabidiolicacid (CBDA) (B), tetrahydrocannabinol (THC) (C) and tetrahydrocannabinolic acid (THCA) (D) of hemp seedlings at 30, 60, and 90 DAT. Here and subsequent figures: L1, MW 240 (Red 35% + Blue 25% + Green 40%); L2, FS 240-UV (Red 40% + UVA and Blue 26% + Green 29% + Far red 5%); L3, MB 240 (Red 85% + Blue 15%); L4, PF 240 (Red 70% + Blue 30%); ND, not detected. All treatments used a photosynthetic photon flux density of 300 µmol m⁻² s⁻¹. Column height indicates the mean, vertical bars indicate the standard error of the mean (n = 4), and different letters indicate significant differences at p < 0.05.