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potted Ornithogalum , more information on preplant environmental conditions and greenhouse protocols is needed. Determination of proper temperature sequences for the entirety of bulb production and utilization is an important aspect of flower bulb

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102 POSTER SESSION 4F (Abstr. 224–233) Photoperiod/Temperature/Growth—Floriculture

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plants into flower during periods of high demand (e.g., holidays) requires knowledge of environmental characteristics that regulate flowering. Temperature has been reported to control flowering in several orchid genera such as Dendrobium ( Rotor, 1952

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ornamental plant production. Although orchid flowering is generally not a well-understood phenomenon, significant progress has been made in understanding the role of environmental factors, particularly for Phalaenopsis . Temperatures below 26 °C are required

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plantable, compostable, or recyclable containers as an alternative way to improve the sustainability of current production systems ( Nambuthiri et al., 2015 ). Container materials and colors can affect plant growth by modifying substrate temperature and the

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60% flattened and deformed fruits and thus are unmarketable ( Ali and Kelly, 1993 ; Aloni et al., 1999 ). Several reports have previously addressed the effect of low night temperature (LNT) on flower and fruit development and malformation in sweet

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Abstract

Poinsettias (Euphorbia pulcherrima Willd. cvs. Annette Hegg Supreme, V-10, and Brilliant Annette Hegg) were grown on heated benches and exposed to root zone temperatures between 18° and 29° C. Increasing media temperatures affected bract size and development, internode length, fresh and dry weight of stems, leaves, and bracts, as well as the number of axillary shoots of cultivars differentially. In general, plants grown at higher temperatures were shorter, had more prominent axillary shoots, and developed anthocyanin sooner than unheated controls.

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throughout the United States via air and truck transport ( Nell and Leonard, 2005 ). Presently, there is considerable emphasis and discussion within the floral industry regarding the lack of cold temperature management (cold-chain) during flower transport

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