A comparative study of achene morphology in Korean Polygonaceae

  • Min-Jung Kong Laboratory of Plant Systematics, Department of Biology, Kyung Hee University, Seoul 02447
  • Jun-Ho Song Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, Naju 58245
  • Beom-Cheol An Laboratory of Plant Systematics, Department of Biology, Kyung Hee University, Seoul 02447
  • Sung-Won Son Plant Conservation Division, Korea National Arboretum, Pocheon 11186
  • Gang-Uk Suh Plant Conservation Division, Korea National Arboretum, Pocheon 11186
  • Mi-Jin Chung Plant Conservation Division, Korea National Arboretum, Pocheon 11186
  • Suk-Pyo Hong Laboratory of Plant Systematics, Department of Biology, Kyung Hee University, Seoul 02447

Abstract

A comparative macro- and micromorphological study was conducted on achenes of Korean Polygonaceae comprising 45 taxa under 10 genera using a Stereo-microscope (SM) and Scanning Electron Microscope (SEM) to evaluate the taxonomical relevance of achene morphological characteristics. The achene shape is lenticular, biconvex, trigonous, or spheroidal. The largest achenes are found in Fagopyrum esculentum Moench (5.80–6.70 × 3.90–4.40 mm) and Rheum rhabarbarum L. (5.00–6.50 × 4.00–5.20 mm), and the smallest is found in Rumex maritimus L. (1.17–1.41 × 0.60–0.84 mm). Three types of embryo shape (curved, straight, and folded) and two types of embryo position (plane and parietal) can be distinguished. Most taxa have a curved embryo shape with plane position. Four types of surface patterns (smooth, papillae, tuberculate, or small pits) are observed. The surface sculpture or embryo type is rather consistent at the generic or tribal level, and the comprehensive consideration of achene characteristics is also useful at the species level. The achene morphology is described in detail, compared, and illustrated. The taxonomic significance of the achene morphology is discussed.

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Abstract
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Published
2018-12-29
How to Cite
Kong, M.-J., Song, J.-H., An, B.-C., Son, S.-W., Suh, G.-U., Chung, M.-J., & Hong, S.-P. (2018). A comparative study of achene morphology in Korean Polygonaceae. Bangladesh Journal of Plant Taxonomy, 25(2), 135-148. https://doi.org/10.3329/bjpt.v25i2.39536
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Articles