柳兰花蜜腺的发育解剖学研究

Developmental and Anatomical Studies o the Floral Nectaries in Chamaenerion angustifolium (L.)Scop.

柳兰花蜜腺杯状，贴生于凹形的花托内壁上，属花托蜜腺．它由分泌表皮，产蜜组织及亚腺组织构成．分泌表皮由一层细胞组成，具变态气孔，角质层薄，产蜜组织由１５～２０层细胞组成，无维管束，但在其外侧的亚腺组织中有维管束．柳兰花蜜腺发育早期无特定的原始细胞，是由花托内周表面细胞特化而成的．在蜜腺发育过程中，蜜腺细胞内的液泡、淀粉粒有明显的动态变化，其变化与蜜汁的形成、分泌密切相关．

Chamaenerion angrstifolium (L.)Scop.has a cup-shaped nectary which locates in hollow receptacle,belonging to receptacle nectqry.The nectary is composed of eqidermis ,nectariferous tissue and subglandulartissue.One layer of eqidermis on which modified stoma lie is covered by a thin cuticular layer.15-20 layersof nectariferous tissue lack vascular bundle which is present in external subglandular tissud. The nectary is differentiated from the srperfical layer cells of receptacle and that no special initial has been found. Duringthe development of the nectary. both the starch grains and the vacules have occurred obvious dynamicchange.These changes were related to the synthesizing and secrdting of nectar.