<正>对297条畅树基因序驯的起始密码子AUG侧翼区序列（-20位点-+6位点）的碱基分布特性进行了统计学分析，并对高表达基因和低表达基因翻译起始位点侧翼序列碱基的保守性和关联性进行了对比分析。结果表明：紧邹起始密码子5’端的-1、-2、-3、-4、-5和-6位点均强烈偏好A，+4位点强烈偏好G，同时高表达和低表达基因的～20位到+4位中某些位点的保守性存在较大差异，其中高表达基因的-6，-3和+4位可能与其高表达的特性有关；通过关联性分析可以看出，在起始密码子侧翼序列的某些特定区域碱基之间的关联陛可能也与翻译起始效率有关系；相关性兮析表明低表达基因的AUGCAI主要受到“AuG侧翼区”序列的GC含量的影响，低表达基因在AUG侧翼区富集Gc对翻译有一定影响。

The dynamic changes of endogenous hormone content during flower bud differentiation were studied in Lycoris radiata while the bulb was anatomized. The relationship between the endogenous hormones and nucleic acid’ s content was analysed. The results showed that the peak of endogenous hormones content was IAA,ABA in former differentiation stage, GA in forming for stamen and ZR in forming for pistil in flower bud morphogensis. The nucleic acid content peak followed. It presented endogenous hormones regulated nucleic acid metabolism progress. IAA and ABA were the most important facts in flower bud differentiation progress. The high ratio of ABA to GA accelerated both forming differentiation and development of flower bud formation. High ratio of IAA to ZR and ABA to ZR accelerated flower bud formation,but it went against stamen and pistil formation. All these Showed that. the content of the four endogenous hormones varied remarkably and achieved a balance at the end. The flower bud differentiation was finished at the end.