The preservation of foliage extends its ornamental value by preventing decay. Early plant preservation included the replacement of the internal moisture of fresh flowers with glycerin ( Hartshorne 1865 ), a sugar alcohol used in food and skin
The commercial production of preserved plant materials for decorative purposes is expanding. The industry, once dominated by a relatively small number of large wholesale firms, marketing through traditional retail florists, is undergoing change. A large retail craft supply industry, country accent retail stores and home-based businesses selling at craft fairs have greatly expanded the market for preserved plant materials. Glycerin has often been used to maintain flexibility and reduce breakage of preserved foliages. Dyes are added to the glycerin to add color to the tissue as the chlorophyll fades. Competition in the marketplace places constant pressure on controlling costs. Technical grade dyes of lower dye purity and higher salt concentrations have a lower cost per gram of material than food grade dyes. The effect of the two grades of dye on uptake of glycerin/dye solutions into Eucalyptus cinerea were measured. Under both growth chamber and laboratory room environments glycerin solution alone was systemically absorbed at a greater rate and in larger quantity than either grade of dye. A variation in systemic absorption between grades of dye was also indicated.
Ranunculus asiaticus (L.) is an ornamental geophyte with some commercial production challenges presumed to be related to the storage of its desiccation tolerant tuberous roots (TRs). We investigated the influence of temperature and relative humidity during storage on viability of R. asiaticus TRs. The TRs were stored in specialized chambers for controlling relative humidity under flow-through or closed systems. In the flow-through system, air was bubbled through glycerol–water solutions to create relative humidities of 20%, 40%, 60%, 80%, or 100% and then passed through storage chambers held at 5, 20, or 35 °C for up to 20 weeks. In closed storage, tissue was equilibrated to a given moisture content (fresh basis) at 15 °C by suspending TRs over glycerol–water solutions (35%, 60%, or 85% relative humidity) with fans to circulate air. These containers were closed for 4 weeks and then tissue was transferred to sealed jars for up to 17 weeks at 5 or 25 °C. In both systems, TRs held with elevated temperature and relative humidity had the largest decrease in percent survival when planted after storage. Flow-through storage gave greater variability in TRs moisture content than closed storage. Tuberous roots at 25 °C had higher respiration rates than at 5 °C under closed storage; elevated moisture content also led to increased respiration. From these results it can be concluded that R. asiaticus dry TRs should be stored cool and dry for long-term viability.
). The use of polypropylene glycol, polyethylene glycol, and glycerin also caused the same defects (data not shown). 2) Petal discoloration occurred by soaking flowers in high-hydrophilic solvents (e.g., methyl alcohol) as the primary soaking solvent or
flower was placed on a microscope slide using a camel-hair brush (n = 3 flowers per plant). A 30 μL drop of stain [5% aqueous aniline blue solution (1% solution), 2.28 m phenol, 2.67 m lactic acid, and 5.47 m glycerin] was pipetted onto the slide
, Yuvarlak Bardak, Uzun Memeli, and Bugur. Dimensions of pollen grains. Samples of pollen grains were placed on a microscope slide and fixed with a drop of glycerin before they were covered with a coverslip. An ocular micrometer was used to measure the
% sucrose promoted more somatic embryogenesis, chlorophyll formation, and RuBisCO activity. According to a report issued by the Glycerin Producers’ Association (1964), glycerol has several potential uses in the agricultural, floricultural, and horticultural
study conducted by Albrecht et al. (2004) investigated the use of prohexadione–calcium, vitamin E, and glycerin to reduce frost injury in apple ( Malus domestica ) and reported a significant reduction in frost injury resulting from the application of
-molded, had the same volume and top diameter as controls, and were made of a soy-based polymer formulated with soy protein isolate (26%), soy flour (26%), water (31%), glycerin (12%), phthalic anhydride (4%), sodium sulfite (1%), and potassium sorbate (less
-month-old monoxenic cultures after liquefying the medium with sodium citrate buffer ( Doner and Bécard, 1991 ). One hundred spores from each origin were included in an acid glycerol solution (90 mL distilled water, 10 mL 1% HCl, 100 mL glycerin