Study On Morphogenesis And Physiological Mechanism Of L.×Formolongi's Bulblet

With the variety 'leishan No.1' of L. ×formolongi, this experiment studied growth and development of seeding plant ,bulblet morphogenesis and the physiological mechanism, the results indicate:1. Seeding plant of L. ×formolongi complete one growth periodicity in one year, the stage of differentiation of flower bud is the pivotal point of growth progress, the plant grows vigorous before differentiation of flower bud and the bulb gets luxuriant growth after differentiation of flower bud. The grow progress of bulb is divided to 5 stages: probulb idiophase, probulb enlargement stage, primarybulb idiophase, bulb weight fast gain stage and bulb plenum stage.2.Different scale cutting made different propagation rate of bulblet.The order is: exothecium scale>mososphere sale>penetralium scale,there are two reasons:1) The origin and maturity extent of different layer scale is different, exothecium scale is derived from embryo, the mososphere sale and penetralium scale are derived from probulb, the mososphere sale is formatted earlier than the penetralium scale.2) The soluble protein the soluble sugar and hormone content of different layer scale is different, by and large the exothecium scale has more physiologic active substance.The results also showed that light can increase the number and the weight of bulblet during the scale cutting propagation.3.This paper showed the bulblet morphogenesis of L. ×formolongi in scale propagation. The process of bulblet morphogenesis is divided to 3 stages: prepare stage,cell-booming-fission-stage and organ- formation-stage. The bulblets originated from the inner parenchyma tissue of scale not callus tissue.