Studies On Anatomy And Development Of Polygonatum Mill. In Anhui Province

The progress of researches was summarized in Polygonatum Mill. which mainly involved biological characteristics, taxonomy, pollen, karyotype, economic value, exploitation and ultilization, ect. And put forward some problems on the research of Polygonatum Mill. in Anhui Province. This makes a prospect on the research direction and exploitation and ultilization of Polygonatum Mill. The paper had studied anatomy and development of leaf and flower of Polygonatum Mill. in Anhui Province and the results were as following:First, by using paraffin sectioning to study the anatomy of leaf blades and investigate the leaf epidermis under light microscopy (LM) and scanning electron microscopy (SEM), the results showed that the idioblasts with raphide are common in Polygonatum Mill. No hairs were on upper epidermis among 7 species and only P. odoratum has hairs on lower epidermis. Stomatal apparatus distributed only on lower epidermis. Some stomatal apparatus characters such as size, distribution and shape of surface cells show more or less difference among the species. Those characters provide experimental evidence for studies on division of species and systematic evolvement relationships of Polygonatum Mill.Second, by using paraffin sectioning to study the anatomy of leaf blades of 5 populations and investigate their leaf epidermis under LM and SEM, the results showed that there are more or less difference on leaf epidermal characters such as size, index, density and distribution of stomatal apparatus, cuticular ornamentation and distribution of epidermal hair in different populations because of environment. But some characters such as structure of mesophyll, inclusion (such as raphide), type of stomatal apparatus and shape of epidermal cell show stabilization in species which may be regarded as evidence for division of species.