because of high heat and drought tolerance and low maintenance cost. Despite the stronger winter-hardiness comparing to other warm-season grasses, it has a relatively shorter green period than cool-season grasses. Therefore, zoysiagrass cultivars with a greater brightness as in the hue-saturation-brightness system during the dormancy are more desirable for of this experiment was to determine factors that are important for winter dormancy color of zoysiagrass. Materials tested were two commercial cultivars and Plants were maintained in growth chambers and freezers that have temperatures, photoperiods, and light intensity controlled to simulate growth conditions in fall and winter. Grass color was analyzed based on the CIELAB color space. During the dormancy period, all accessions lost green color (the greento-red scale, a*, became more positive). The levels of the accessions and cultivars as indicated by the blueto-yellow scale (b*) (5.75 to 12.75). The leaf brightamong the accessions with brightness (L*) ranging from 41.75 to 50.75. Trichome density showed no effects on dormancy color or brightness. Despite the fact that accessions from lower latitudes were waxier, increasing waxiness in winter-hardy materials also increased dormancy color brightness. Both carot-siagrass.
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