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W. Garrett Owen and Roberto G. Lopez

( Currey and Lopez, 2013 ). Additionally, LEDs provide narrow-spectrum light in wavebands suitable for plant growth and development, including blue (450 nm), red (660 nm), and far red (730 nm). Several studies have investigated growth, development, and

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Dave Hawley, Thomas Graham, Michael Stasiak, and Mike Dixon

., 2017 ; Stasiak et al., 1998 ). The objectives of this study were to evaluate bud yield, and cannabinoid and terpene contents when plants were grown with no SCL (control), Red-Blue SCL, or RGB SCL. Two crop cycles are presented; the results of the first

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Paul Deram, Mark G. Lefsrud, and Valérie Orsat

are in the blue and red wavelengths; peaks in photosynthetic efficiency are found at 440 (blue), 620 (red), and 670 (red) nm (± 10 nm) ( McCree, 1972 ). The rapid improvement in LED technology has been driving research in plant production in recent

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Noriko Ohtake, Masaharu Ishikura, Hiroshi Suzuki, Wataru Yamori, and Eiji Goto

effects of red and blue light on plant development and growth have been extensively studied because these wavelengths are predominantly absorbed by photosynthetic pigments and efficiently drive photosynthesis ( Abidi et al., 2013 ; Massa et al., 2008

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Masahumi Johkan, Kazuhiro Shoji, Fumiyuki Goto, Shin-nosuke Hashida, and Toshihiro Yoshihara

morphology pattern ( McNellis and Deng, 1995 ). For example, blue light suppresses hypocotyl elongation and induces cotyledon expansion, and red light induces hypocotyl elongation and cotyledon expansion in Arabidopsis seedlings. Blue light is involved in a

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Hiroshi Hamamoto and Keisuke Yamazaki

-day plants (SDPs) in that study was delayed as much under red light as under white light. Blue-light long-day treatment influenced the flowering of only two SDPs [ Camelia japonica (Theaceae) and Perilla nankinensis (Lamiaceae)] as well as red-light long

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Leora Radetsky, Jaimin S. Patel, and Mark S. Rea

commercial horticultural luminaires: blue LEDs (λ max ≈ 450 nm) and red LEDs (λ max ≈ 660 nm). The present study used commercial horticultural LED luminaires to examine the ability of red and blue LEDs to reduce DM disease pressure on basil commonly grown

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Yuya Mochizuki, Saori Sekiguchi, Naomi Horiuchi, Thanda Aung, and Isao Ogiwara

increase yield. In the basic knowledge of photosynthesis, plants absorb red and blue light better than green light, and the characteristic absorption wavelength did not involve temperature and ambient CO 2 concentration ( McCree, 1971–72 ). Moreover, Pn of

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Fang Geng, Renae Moran, Michael Day, William Halteman, and Donglin Zhang

propagation cycle, unlike prolonged subculturing ( Webster and Jones, 1991 ). Few studies have measured variation in response to light quality among apple rootstock cultivars. In MM.106 apple, culturing under red or blue light reduces in vitro shoot number

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Heidi Marie Wollaeger and Erik S. Runkle

., Kankakee, IL). Fig. 1. The spectral distribution of six light-quality treatments delivered by blue (B), green (G), and two types of red (R) light-emitting diodes (LEDs) and one treatment delivered by cool-white fluorescent lamps, each delivering a