一串红结实性及花芽分化研究

对8种颜色一串红的结实率、落花率及成熟胚珠败育率进行了调查,同时,对一串红的花芽分化过程进行了石蜡切片观察,以探讨一串红结实率较低的原因.结果表明一串红的平均结实率为15.81%,平均落花率为23.13%,成熟胚珠败育率为84.13%;一串红的花芽分化是从第4个叶节开始,在第9个叶节时分化结束;在花芽分化过程中在一个叶节上可以形成2～3个小花原基,但实际上只有1～2朵花能够开放,其余退化或脱落,这是一串红结实率低的一个重要原因.

Study on the Seed-setting and the Flower Bud Morphological Differentiation in Salvia splendens Ker-Gawl

The seeding rate,the drop flower rate and ovule failing growth rate of the eight color Saliva splendens were investigated and the flower bud morphological differentiation in Saliva splendens through the paraffin section was observed in order to determine the cause of affecting fecundity of salvia s plendens. The results indicated the average seeding rate was 15.81%, the average drop flower rate was 23.13%,and the mature ovule failing growth rate was 84. 13% in the eight color Saliva splendens. The flower bud morphological differentiation began at 4th leaf burl and finished at 9th leaf burl; In this process,there were two to three of flower anlages on one of leaf hurl,however,there were only one to two flower opening, the rest were degenerated or failed, which was one of the important reasons why there was a low seeding rate in Saliva splendens.