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Abstract
The microscopic structure and histochemical localization of the Polygonatum sibiricum, P. cytonema, P. filipes, P. zanlanscianense and P. odoratum was studied. Scanning electron microscope (SEM) and digital biological microscope (DBM) were applied in the research. Venation bundle showed in three types included collateral, amphivasal and incomplete amphivasal bundles. Morphological differences of venation bundles could be seen under the fluorescence microscope. Calcium oxalate existed in the mucilage cells looked similar to columnar crystals under SEM. In rhizome of Polygonatum, polysaccharides presented in mucilage cells, saponins and volatile oil were found in ground tissue. Microstructure difference of rhizomes would be used for identification of the Polygonatum plants. Polysaccharides and saponins are distributed in different cells of Polygonatum plants.
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