Physiological And Morphological Changes Of Lily Bulb In Cooling Storage And Bud Differentiation Periods

This paper is about physiological and morphological analysis for bulbs of three kinds of lilies. They are "Snow Queen"(Longiflorum hybrids), "Siberia"(Oriental hybrids) and "Gondelina" (Asiatio hybrids). The changes of total soluble sugar , starch and endogenous hormones in different periods of the three kinds of lilies were determined. The morphodifferentiation of three kinds of lilies floral bud were also studied. The results are as follows:In the identical three kinds of lilies ,the biological weight(FW and DW) from the most to the least are:Siberia (Oriental hybrids) 55.18g and 19.42g; Gondelina (Asiatio hybrids) 47.72g and 14.51g; Snow Queen (Longiflorum hybrids) 33.03g and 10.78g.The total soluble sugar and starch are the main form of carbohydrates in lily bulbs. They are the foundation of energy that break the bulb dormancy and induce the bud differentiation. The lily bulb is the source of nutrient in the bud differentiation periods. The total soluble sugar is accumulated for bulb development. The starch is only a form of carbohydrates of stored.It was found that the contents of water in bulb decreased more and the total carbohydrates decreased slightly during the whole storage. Endogenous ABA is the primary inhibitor in bud ; Endogenous GA1+3 is promoter of progress in bud; IAA is beneficial for the stem elongating fast; ZR is beneficial for the start of the bud differentiation of Siberia and Gondelinna .The process of bud differentiation would be divided into five phases:â… No differentiation visible .â…¡Floral primodia visible.â…¢ Petal visible .â…£ Stamen and pistil visible.â…¤The whole inflorescence visible . Through the experiment of morphology we found : It takes Gondelina and Snow Queen about one month to sprout. It takes Siberia about 45days to sprout.