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Liang Zheng, Qi Zhang, Kexin Zheng, Shumei Zhao, Pingzhi Wang, Jieyu Cheng, Xuesong Zhang, and Xiaowen Chen

·m −2 ·s −1 ( Fig. 3A ); however, the maximum fluctuation amplitude of the 20% haze compartment was 233.5 μmol·m −2 ·s −1 , with an average of 101.2 μmol·m −2 ·s −1 ( Fig. 3B ). In the 29% haze compartment, the lower canopy PPFD was kept above than

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Chase Jones-Baumgardt, David Llewellyn, Qinglu Ying, and Youbin Zheng

, Potter et al. (1999) reported responses of canola ( Brassica napus L. ‘Westar’) seedlings to SS PPFD ranging from 25 to 500 μmol·m −2 ·s −1 . The seedlings were grown on a per-cell basis in a germination tray (vs. a dense microgreen canopy), but the

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Giedrė Samuolienė, Akvilė Urbonavičiūtė, Pavelas Duchovskis, Zenonas Bliznikas, Pranciškus Vitta, and Artūras Žukauskas

harvesting time of the plants (≈30 d) was performed under natural daylight (averaging ≈300 μmol·m −2 ·s −1 PPFD within a 14-h photoperiod and up to 1500 μmol·m −2 ·s −1 peak PPFD ; daily integral of lighting ≈15 mol·m −2 ). Daylight was supplemented by

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Kui Lin, Zhi Huang, and Yong Xu

according to a random sampling method. All measurements were repeated three times for the same sample. Light treatments. Three light qualities, namely, red (R), green (G), and blue (B), provided by LEDs at two intensities (PPFD of 120 or 150 μmol·m −2 ·s −1

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Yuyao Kong, Ajay Nemali, Cary Mitchell, and Krishna Nemali

(SAS, version 9.4; SAS Institute, Cary, NC) and means were compared using the Tukey’s honestly significant difference procedure. A model that included red, green, blue, R:B, R:G, B:G, and PPFD as predictor variables was used to describe response

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Alexandra García-Castro, Astrid Volder, Hermann Restrepo-Diaz, Terri W. Starman, and Leonardo Lombardini

(model 6400-02B LED; LI-COR) supplied 1200 μmol·m −2 ·s −1 PPFD which is light saturation as determined with a light response curve performed before the beginning of the experiment. Other settings included a reference level CO 2 of 400 μmol·mol −1 , a

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Jasmine Jenji Mah, David Llewellyn, and Youbin Zheng

:FR ( Demotes-Mainard et al., 2016 ; Smith and Whitelam, 1997 ). In easter lily, a typical response to additional FR includes increased stem elongation ( Blom and Kerec, 2003 ; Blom et al., 1995 ). During the daytime (i.e., solar elevation > 10°–15°), the R

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Yun Kong, Devdutt Kamath, and Youbin Zheng

microgreens with unfolded true leaves under 24-h lighting, different species varied in their elongation-promotion response to blue vs. red light at a PPFD of 100 μmol·m −2 ·s −1 , showing a lower sensitivity in mustard than other species ( Kong et al., 2019

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Julie M. Tarara, Bernardo Chaves, and Bernadine C. Strik

standard practices for blueberry production in Oregon ( Strik et al., 1993 ). Microclimate measurements. PPF density ( PPFD ) was measured by a silicon quantum sensor (LI-190; LI-COR, Lincoln, NE) at 25 cm above ground in one empty tube per tube type and

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Dave Llewellyn, Katherine Schiestel, and Youbin Zheng

used to replace HPS SL in cut gerbera production during the normal SL season in Ontario, Canada, by comparing harvest and postharvest metrics of crops growing under equivalent supplemental PPFD (µmol·m −2 ·s −1 ) in a concurrently replicated greenhouse