Fig. 4 | Scientific Reports

Fig. 4

From: Transcriptomic analysis of CDL-gated photoperiodic flowering mechanisms in cannabis and their responsiveness to R: FR ratios in controlled environment agriculture

Fig. 4

Experimental Design and Validation of R:FR treatments. A and B Spectroradiographs confirming the R:FR ratios generated by the light fixtures. High R:FR conditions show a large peak at 660 nm and no peak in the 700 nm + (FR) range (Panel A). Low R:FR conditions show a large peak at 660 nm as well as a large peak in the FR 700 nm + range (Panel B).C and D: Plants in their treatment conditions, the light color is determined by treatment. The high R:FR light appears pinker (Panel C). The low R:FR light appears more purple (Panel D). In both conditions, PPFD and B:R ratios are normalized. Spectral conditions calculated from 5 measurement zones. High R:FR Conditions: R:FR Ratio = 19.27, standard deviation of 0.48. Average R:B Ratio = 1.91, standard deviation of 0.04. Average PFD = 399.34, standard deviation of 6.08. Low R:FR Condtiions (Control): R:FR Ratio = 2.65 standard deviation of 0.09, Average R:B Ratio = 1.88, standard deviation of 0.03, Average PFD = 398.41, standard deviation of 7.96.

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