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http://dx.doi.org/10.6116/kjh.2018.33.3.11.

A Comparative Anatomical Study of Saururus chinensis (Lour.) Baill. and Houttuynia cordata Thunb. (Saururaceae)  

Yang, Sungyu (Herbal Medicine Research Division, Korea Institute of Oriental Medicine)
Choi, Goya (Herbal Medicine Research Division, Korea Institute of Oriental Medicine)
Publication Information
The Korea Journal of Herbology / v.33, no.3, 2018 , pp. 11-18 More about this Journal
Abstract
Objectives : Saururus chinensis and Houttuynia cordata (Saururaceae) are perennial herbs using for medicinal purposes in Korea. The objectives of this study are to compare anatomical key characters between two medicinal plants and to provide fundamental information for the identification of two herbal medicines by using anatomical features. Methods : Cross-sections of root, rhizome, stem, petiole, and leaf for each species were observed in this study. Materials were analyzed through dehydration, paraffin embedding and micro-sectioning, and double staining with Safranin O and Fast-Green FCF. Observations of permanent preparation were conducted using light microscope. Results : S. chinensis and H. cordata were distinguished with anatomical differentiations; Idioblasts with essential oil were scattered in the parenchyma cell of cortex, pith, and phloem of S. chinensis, on the other hand, in H. cordata, idioblasts were distributed ring-shaped in the cortex of the root. S. chinensis had two cycles of vascular bundles in the stem while H. cordata had one cycle. Hypodermis layer was conspicuous in a stem of H. cordata, crystals were observed the only parenchyma in a stem of S. chinensis, and epidermal oil cells were developed in the epidermis of H. cordata. S. chinensis had air cavity at the cortex and pith of the stem. The shape of cross-section was polygonal in the stem of S. chinensis and was circular in the stem of H. cordata. Conclusions : We investigated anatomical study of Korean S. chinensis and H. cordata. To identify two herbal medicines, we considered main anatomical features and provided identification key here.
Keywords
Saururaceae; Saururus chinensis; Houttuynia cordata; comparative anatomy; light microscope;
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