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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

Light quantity and timing are often variable in urban and suburban landscapes ( Kjelgren, 1995 ). Buildings often cast shadows to the north (in the northern hemisphere) and east and west sides of buildings provide only morning or afternoon sun

therefore especially important when studying different growth phases of onion. Control of light quantity and quality are critical to manage onion growth and development in controlled environments ( Brewster, 2008 ). Under controlled environments, fluorescent

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

received. A significant correlation between auxin concentration and TDW produced has been found. T 2 characterized for the lowest PAR :NIR, B:R, B:FR, and R:FR provides adequate light quantity and quality for all cultivars within the parameters RDW, TDW

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

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

systems: the overstory and the understory. In the understory, the greatest competition comes from changes in light quantity and light quality ( Malézieux et al., 2009 ). In natural ecosystems, the understory is inhabited by plants that are shade tolerant

.L. 1990 Interaction between light quality and light quantity in the photoregulation of anthocyanin production Plant Physiol. 92 1191 1195 Mazza, G. Miniati, E. 1993 Anthocyanins in fruits, vegetables, and grains