黄花补血草叶片盐腺的发育解剖学研究

利用扫描电镜和石蜡切片法对黄花补血草叶片进行解剖学研究,观察叶片营养器官中盐腺的分布、密度、结构及发育过程。结果表明:黄花补血草叶片上、下表皮有大量的盐腺分布,且下表皮的盐腺密度比上表皮的多,盐腺周围有7～9个表皮细胞呈辐射状排列;盐腺的成熟结构由12个细胞构成,中央有4个分泌细胞,每个分泌细胞都有一个明显的分泌孔,是盐分泌出的通道;分泌细胞外侧伴有4个弧形的毗邻细胞围成一圈;盐腺内部靠近叶肉细胞处有4个收集细胞。研究认为,黄花补血草盐腺由一个表皮原始细胞发育而成,分别经历单细胞时期、2细胞时期、4细胞时期、8细胞时期和12细胞时期的不同发育阶段。

Developmental and Anatomical Studies of the Salt Gland in Limonium aureum

The leaf anatomical structure of Limonium aureum was studied by SEM and paraffin method,especially for observing the salt gland location,structure and development.The result indicated that a lot of salt glands was lay in the leaf.The density of salt glands on the abaxial epidermis was slightly higher than that on the adaxialepidermis.And 7~9 epidermal cells radially arranged surrounding thesalt gland.The mature structure of salt gland included 12 cells.There were 4 central secretory cells,and a small hole on the center of saltgland cuticle,where salt released.Outside the secretory cell were the adjacent cells,which were cambered.Behind them were 4 big cells called collecting cell which was close tomesophyll cells.The salt gland of Limonium aureum originaled from a single epidermal cell.After that,it went through 5 stages which were called as single cell stage,2 cell stage,4 cell stage,8 cell stage and 12 cell stage,respectively.