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lettuce Environ. Expt. Bot. 67 59 64 Litvin, A.G. 2019 Quantifying the effects of light quantity and quality on culinary herb physiology. Ph.D. Diss., Iowa State Univ., Ames Lorrain, S. Allen, T. Duek, P.D. Whitelam, G.C. 2008 Phytochrome

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burst, sugar signaling for growth resumption, and chloroplast biogenesis ( Signorelli et al., 2018 ). The timing of light application can have both promotive and inhibitive effects ( Gur, 1985 ; Samish et al., 1967 ). Light quantity manipulation during

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, P.A. 1996 Light intensity and spectral quality affect fruit growth and shelf life of greenhouse-grown long English cucumber J. Amer. Soc. Hort. Sci. 121 1168 1173 Litvin, A.G. 2019 Quantifying the effects of light quantity and quality on culinary

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regulates plant behavior depending on light quantity, quality, direction, and duration ( Chang et al., 2008 ; Dou et al., 2017 ; Figueiredo et al., 2008 ; Shafiee-Hajiabad et al., 2016 ). Daily light integral [the product of photosynthetic photon flux

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anthocyanins are known to contribute to leaf color ( Gazula et al., 2007 ). Environmental factors such as light quantity, quality, and duration and temperature can strongly influence the accumulation of these pigments ( Owen and Lopez, 2015 ). In the present

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et al., 2014 ). Transient anthocyanin accumulation occurs with changes in light quantity and/or quality, and has been documented in a variety of plants including: tomato, Arabidopsis , maize, sorghum, rye, red cabbage, and mustard ( Chalker

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Light quantity and quality supplies sharply affect growth, morphological, physiological and quality traits of basil Ind. Crops Prod. 122 277 289 doi: 10.1016/j.indcrop.2018.05.073 10.21273/HORTTECH.14.2.0235 Succop, C.E. Newman, S.E. 2004 Organic

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; Stafford, 1994 ; Steyn et al., 2002 ). High tunnels may affect the accumulation of anthocyanins by impacting both the total light quantity and quality reaching the crop canopy. Growers use a wide variety of polyethylene films to construct high tunnel roofs

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and distribution of chlorophylls are known to contribute to leaf color ( Gazula et al., 2007 ) and, thus, aesthetic appeal and ornamental value. Environmental factors such as DLI (light quantity and duration) can strongly influence the accumulation of

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.M.F.M. Raaphorst, M.G.M. 2006 Quantification of the growth response of light quantity of greenhouse grown crops Acta Hort. 711 97 104 https://doi.org/10.17660/ActaHortic.2006.711.9 Moon, D.M. 1976 Yield potential of Asparagus officinalis L. Asparagus

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