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seeds within a growing season of ≈170 d and survive in areas that receive average annual minimum winter temperatures of –26 to –29 °C. Trees at the southern extent of the range in Oaxaca, Mexico, may experience no freezing temperature in some years and

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colorful and/or uniquely shaped scions as potted plants ( Kim and Kim, 2006 ). Erwin (1996) subsequently researched temperature and photoperiod effects on grafted cacti growth to decrease scion losses. Little recent work has focused on desert cacti

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Mills (1994) found that as RZTs increased, snapdragons improved their nutrient uptake and growth. Wai and Newman (1992) reported that time to flower for cut flower snapdragon was reduced when RZTs increased even when air temperatures were cool

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production areas. For this reason, large temperature fluctuations are likely to impact vine progress in its transition from active growth to a dormant resting state. To stabilize production in these northern regions of the United States through cultivar

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52 ORAL SESSION (Abstr. 449-456) Growth and Development: Effects of Light, Temperature, and CO,

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Characterizing the regulation of development by temperature requires controlled exposure of replicate plants (whole or in part) to multiple temperature environments simultaneously. Experiments with seeds or other small plant segments can be

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concentration is highly influenced by genotype and environmental factors including soil fertility, temperature, and light ( Antonious et al., 1996 ; Charron and Sams, 2004 ; Engelen-Eigles et al., 2006 ; Rosen et al., 2005 ). We found strong correlations

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seedling growth rates vary with temperature. It would, therefore, be interesting to assess the accuracy of degree-days, a common indicator of plant phenology, to predict seedling development ( Bonhomme, 2000 ; Brisson et al., 2003 ; Jones et al., 2003

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optimal germination temperature is unknown, the studies above indicate that temperatures at or above 20 °C inhibit germination and at 10 °C germination is enhanced. Our work aims to achieve further precision of the effect of temperature on seed germination

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et al., 2009 ; Natarella and Kays, 1979 ), decrease quickly when they are stored dry because of their inability to rehydrate. Successful dry storage is highly influenced by storage duration and temperature. The vase life of ‘Ambiance’ rose ( Rosa

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