Pericarp, seed coat anatomy and seed morphology of Calycanthaceae

Abstract

Trichome morphology and seed coat anatomy display great feature of taxonomic value in the Calycanthaceae. The current Knowledge about the trichome and seed coat anatomy is mainly based on the external and internal observation. Detail anatomical study of the seed provide valuable information for further studied about their function, ontogeny and phylogeny. Therefore the goal of the study was to investigate trichome morphology and seed coat anatomy in Calycanthaceae species to provide more detail Characterization. We investigated trichome morphology and seed anatomy from 8 species of Calycanthaceae. Seed were collected and preserved in formalin -acetic acid-alcohol (FAA) solution. Alcohol series was applied after that proceeds for SEM and anatomical analysis. We found unicellular trichome hair in deferent density, seed surface was irregular and polygonal. Pericarp and seed coat anatomy was investigated, we found 3 layer in each as distinguished feature. The diversity of unicellular trichome morphology is common in all species in Calycanthaceae. Density of trichome is high in Calycanthus occidentalis, different variation of seed coat layer, Pericarp layer is a character of potential phylogenetic significance.

Keywords

• Calycanthaceae
• Pericarp
• Seed coat
• SEM
• Trichome.