木立芦荟叶的发育解剖学研究

应用植物解剖学方法研究了木立芦荟（Aloe arborescens Mill.)叶的发育过程。研究结果表明，叶原基在发育早期其形态是不对称的，内部为同形细胞组成，但很快分化成原表皮，原形成层束和基本分生组织。以后，原表皮发育成表皮，位于原表皮下的2－5层基本分生组织细胞发民同化薄壁组织，而位于中央的基本分生组织细胞则发育成储水薄壁组织，原形成层束发育成维管束。维管束由维管束鞘、木质部、韧皮部和大型薄壁细胞组成。大型薄壁细胞起源于原形成层束，位于韧皮部内，其发育迟于筛管、伴胞，为芦荟属植物叶的结构特征。

Developmental and anatomical studies on the leaves of Aloearborescens

The developmental and the anatomical structures of leaves of Aloe arborescens Mill.were examined with anatomical methods.The results showed that the leaf primordium is unsymmetrical during its early development stage.And the leaf primordium differentiates into protodern,ground meristem and procambial bundles.In the later stage,the protodern develops into epidermis,the procambial bundles develop into vascular bundles and the ground meristem develops into assimilating tissue and aqueous tissue.The vascular bundle consists of vascular bundle sheath,xylem,phloem and big parenchymatous cells.The results also indicated that the big parenchymatous cells origin from procambial bundles and the development of big parenchymatous cells are later than that of epidermis,vascular bundle,assimilating and aqueous tissue.