Storage Duration of Mother Scales' Effects on Soluble Carbohydrates and Amylases in Lily Scale Bulblets
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The scaling is a technique for propagation of Lilium (Gray, 1974; Marinangeli and Curvetto, 1997; Marinangeli et al., 2003). The mother bulbs are scaled and stored in a favorable substrate. Scale bulblets develop on the sides of the individual mother scale (Gray, 1974). This method was studied and reported earlier (Matsuo, 1972; Matsuo and Van Tuyl, 1984; Matsuo et al., 1989; Cabrera, 2002). Addai (2010) found the sucrose as an essential and major carbohydrate in Lilium bulb, because breaking and metabolism of this sugar are important to facilitate the growth of storage organ, inflorescence and others. However, Addai (2010) noticed that starch is a major carbohydrate and as an energy source for bulbous plants such as lily before vernalization. After vernalization, starch breaks to sucrose and reducing sugars (Xu et al., 2006), this phenomenon referred to low temperature sweetening, and has been reported in Lilium, Hyacinthus and Tulipa as well (Miller and Langhans, 1990). Sucrose is a soluble carbohydrate, which is essential for growth of plants, and is as first transfer carbohydrate in more plants. The accumulation of sucrose in scale tissue of bulb can cause sprouting and growing plant (Xu et al., 2006). After translocation of starch from chloroplast and amyloplast to cytosol, UDP-glucose is a start-point of sucrose synthesis. Thus, glucose is a molecule key in synthesizing sucrose, and also glucose is a photosynthesis product its own, and with other photosynthetic product, fructose, produce a sucrose. Addai (2010) described that metabolism of sucrose, glucose and starch supply necessary energy to sprout and the emergence of shoot and roots, also he noticed that fructose accumulate in scales and has a role in spr...
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...ter lily bulbs. HortScience 25(4): 463-465.
Nielsen TH, Deiting U, Stitt M (1997). A β-Amylase in potato tubers is induced by Storage at low temperature. Plant Physiol 113: 503-510.
Ranwala AP, Miller WB (2008). Analysis of nonstructural carbohydrates in storage organs of 30 ornamental geophytes by high-performance anion-exchange chromatography with pulsed amperometric detection. New Phytol 180: 421–433
Shin KS, Chakrabarty D, Paek KY (2002). Sprouting rate, change of carbohydrate contents and related enzymes during cold treatment of lily bulblets regenerated in vitro. Sci Hortic 96: 195–204
Takeda C, Takeda Y, Hizukuri S (1983). Physicochemical properties of lily starch. Cereal Chem 60(3): 212-216.
Xu RY, Niimi Y, Han DS (2006). Changes in endogenous abscisic acid and soluble sugars levels during dormancy-release in bulbs of Lilium rubellum. Sci Hortic 111: 68–72.