垂花青兰花蜜腺的发育解剖学研究

垂花青兰（Dracocephalum nutans Linn.）花蜜腺分布于子房基部的花托上，盘状蜜腺的上部裂成三小一大的四枚裂片，基部在膨大的花托外环绕一圈。蜜腺组织由分泌表皮、产蜜组织和维管束三部分组成，是典型的结构蜜腺；组织化学染色显示淀粉粒动态明显，因此又属淀粉蜜腺。在发育的过程中细胞液泡化动态明显，且淀粉粒和蛋白质具有明显的消长变化，蜜汁通过气孔器和表皮细胞的角质层泌出。

Developmental Anatomy of the Floral Nectaries in Dracocephalum nutans Linn.

The nectaries in Dracocephalum nutans Linn.were located on receptacles under the ovary.The disk nectar upper split into four pieces a list,base in swollen reflexed round the lap cup-shaped receptacle.The nectary composed of secretory epidermis,nectariferous tissue and vascular bundles,which was typical structural nectary.Histochemistry stain indicated that the starch grain exhibited a regular change,hence the nectary belonged to starch nectary.During the development of nectaries tissue,the vacuole occured regular change and the starch grains and protein decreased and increased regularly.The nectar was secreted out through stomata and cuticle.