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Desalegn D. Serba, Osman Gulsen, Bekele G. Abeyo, Keenan L. Amundsen, Donald J. Lee, P. Stephen Baenziger, Tiffany M. Heng-Moss, Kent M. Eskridge, and Robert C. Shearman

buffalograss pollen in the greenhouse at University of Nebraska–Lincoln, East Campus in Lincoln, NE, that was maintained at 33 °C maximum and 16 °C minimum temperatures, ± 2 °C, and a photoperiod of 15:9 h (light:dark) with supplemental light provided by

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W. Garrett Owen and Roberto G. Lopez

:11:33:49 blue:green:red:far-red; Philips GreenPower Flowering deep red/white/far-red LED lamp; Koninklijke Philips Electronics N.V., The Netherlands). Supplemental light was delivered from a 150-W HPS lamp (PL 2000; P.L. Light Systems Inc., Beamsville, ON

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Celina Gómez and Cary A. Mitchell

different lighting treatments. The treatments evaluated were natural solar light only (control); natural + supplemental light [SL; 5.1 mol·m −2 ·d −1 (23-h photoperiod from 0000 to 2300 hr ; 61 ± 2 μmol·m −2 ·s −1 )] from a high-pressure sodium (HPS) lamp

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Jacob C. Domenghini, Dale J. Bremer, Jack D. Fry, and Gregory L. Davis

of plants for the spring/summer study took place in the greenhouse from 19 Nov. 2009 through 17 May 2010. Average day/night air temperature was 25/23 °C and supplemental light was included for 12 h·d −1 . Plants for the fall study were also

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Tonghua Pan, Juanjuan Ding, Gege Qin, Yunlong Wang, Linjie Xi, Junwei Yang, Jianming Li, Jing Zhang, and Zhirong Zou

= CO 2 enrichment and no supplementary light; CaLs = ambient CO 2 and supplementary light; CeLs = both CO 2 enrichment and supplementary light. Photosynthetic pigment contents were increased by supplemental light and by CO 2 enrichment to different

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Marc W. van Iersel, Geoffrey Weaver, Michael T. Martin, Rhuanito S. Ferrarezi, Erico Mattos, and Mark Haidekker

in greenhouses as well, applying supplemental light only as needed. This may be especially beneficial under conditions with fluctuating PPFD from sun light (e.g., in greenhouses), which results in fluctuating Φ PSII ( Janka et al., 2015 ) and ETR

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W. Garrett Owen and Roberto G. Lopez

computerized control system (Priva Computers Inc.). Environmental data for each species under each SSL LED or SL treatments for Reps 1 and 2 are reported in Table 2 . Fig. 1. ( A – E ) Spectral quality of supplemental light (SL) from high-pressure sodium (HPS

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Humberto Aguirre-Becerra, Juan Fernando García-Trejo, Cristina Vázquez-Hernández, Aurora Mariana Alvarado, Ana Angélica Feregrino-Pérez, Luis Miguel Contreras-Medina, and Ramón G. Guevara-Gonzalez

, leaf count, stem diameter, hypocotyl length, leaf area, and chlorophyll concentration, exhibited the benefits of supplemental light, especially under low DLI; however, there were no significant differences among different R/B ratios regardless of the

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Wook Oh, In Hye Cheon, Ki Sun Kim, and Erik S. Runkle

flowering of Cyclamen persicum Hort. Environ. Biotechnol. 47 353 358 Dansereau, B. Zhang, Y. Gagnon, S. 1998 Stock and snapdragon as influenced by greenhouse covering materials and supplemental light HortScience 33 668 671 Dole, J.M. Wilkins, H.F. 2005

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Cary A. Mitchell

lighting, widely spaced, narrow, parallel bars of LEDs perpendicular to the track of the sun across the greenhouse might be the way to go but may not yield very high supplemental light intensities due to low population densities of LEDs along the bars and