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50 estimates observed in Expt. 1 could be due to reduced light quantity and quality when the experiment was conducted (January for Expt. 1 vs. September for Expt. 2). In both experiments, LD 50 estimates were greater than GR 50 estimates, with GR

Higher plants respond to light quantity, quality, direction, and periodicity. There are numerous photoreceptors in plants, including chlorophylls, phtyochromes, cryptochromes, phototropins, and ones that react to green light ( Batschauer, 1999

regulation of flowering of Coreopsis grandiflora ‘Sunray’ by vernalization, photoperiod and light quantity Mich. State Univ East Lansing PhD Diss. Shedron, K.G. Weiler, T.C. 1982 Regulation of growth and flowering in

30% to 60% even without hanging baskets ( Critten, 1986 , 1989 , 1993 ). Hanging baskets potentially impact both the light quantity and spectral light quality delivered to the underlying bench crop as leaves differentially absorb, transmit, or

DLI, which may indicate that light quantity had bigger effects than light quality in lettuce production. This was probably due to the light amounts received by leaves and there were no remarkable differences found in P n among treatments at lower DLIs

a 30-minute interval simulating sunset and sunrise. The light quantity provided by the LEDs was calculated using Eq. [1] and Eq. [2] , where the photon energy (E photon ) was calculated according to the light dominant wavelength (λ) and

to changes in light quantity and quality in three Australian rainforest tree species Oecologia 94 218 228 Yorio, N.C. Goins, G.D. Kagie, H.R. Wheeler, R.M. Sager, J.C. 2001 Improving

based on their spectral properties ( Fig. 1 ). Light quantities reflected by mulches were measured using an Apogee Model Spec-ultraviolet/photosynthetically active radiation spectroradiometer with a reflectance probe attachment (Apogee Instruments, Inc

’ TF were seeded into 3.8-cm-diameter, 21-cm-depth conetainers (Steuwe & Sons, Tangent, OR). Two cultivars of CB were used due to anecdotal evidence of varying responses to light quantity and source among cultivars. After seeding, conetainers were

transpirational properties of the fruit epidermis were not influenced by the colored nets. These results suggest that light quantity rather than light quality (as modified by colored shade nets) influenced the rate of fruit water loss in bell pepper. Fruit