李花芽分化与体内主要代谢产物含量的关系

A Study on Nai Plums Flower Bud Differentiation and Its Major Content of Metabolic Production

为进一步探讨李生长发育规律，提高李的产量和品质，以５～６年生毛桃砧李为材料，采用石蜡切片法观察花芽分化进程，同时测定体内某些物质含量的相应变化．结果表明：李花芽分化始于６月上旬，止于１１月中旬，并可分为未分化期、生理分化期、花原基分化期、萼片分化期、花瓣分化期、雄蕊分化期和雌蕊分化期７个时期．在生理分化期，体内含水量降低，可溶性糖、全氮、游离氨基酸和内源亚精胺等代谢产物含量出现高峰，内源腐胺、精胺代谢产物含量出现低峰，一旦进入形态分化盛期，则大量消耗各类营养物质，使物质积累水平下降，而腐胺。

To increase Nai plums output and raise its quality,and further more explore its growth law,Nai plums (P.Salicina Lind L.),5￣6 years old,are used as the experimental materials. In this experiment,the paraffin cut section method is adapted to observed the developing process of Nai plums flower bud differentiation. Also,the correlal change of its metabolic product contents is measured. The result shows that flower bud development can be divided into 7 stages which are non differentiation,physiological differentiation,flower initiation,receplaole differentiation,petal differentiation,stamen differentiation and style differentiation. The process starts from early June to mid November. At the physiological differentiation stage,the following changes happen:lower water content,lower interned Put and Spm,higher solvable sugar contents and higher total nitrogen. When metabolic products of amino acid and interned Spd reach its peak,the contents of interned Put and Spm drop to its bottom. Therefore,the store substance level greatly decreases at morphological differentiations summit stage for lots of mutritions are used up,while the contents of interned Put and Spm only varies a little.