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Korean J. Pl. Taxon > Volume 42(4); 2012 > Article
Korean Journal of Plant Taxonomy 2012;42(4): 247-252.
doi: https://doi.org/10.11110/kjpt.2012.42.4.247
장미과 짚신나물아족 종피형태의 계통분류학적 고찰
정경숙 , 오병운 , ,
Phylogenetic implication of seed coat sculpturing in subtribe Agrimoniinae (Rosaceae)
Kyong Sook Chung, Nguyet Hoang, Wayne Elisens, Byoung Un Oh
Abstract
Seed morphology in the subtribe Agrimoniinae (Rosaceae) was examined using scanning electron microscopy to identify distinct characters and evaluate their evolution in a phylogenetic framework for five genera in the subtribe: Agrimonia L., Aremonia Neck. ex Nestl., Hagenia J.F. Gmel., Leucosidea Eckl. & Zeyh., and Spenceria Trimen. All genera have one or two mature achenes in a fruiting hypanthium. In the seed coats, the cell shape, size, wall features, and sculpturing vary across genera. Of most significance is the presence of papillae structures in both Agrimonia and Aremonia. Through the mapping of papillae features onto phylogenetic trees, either one or two changes in seed coats are hypothesized. The phylogenetic tree inferred from four nuclear and six chloroplast regions of sequence data suggests that at least two steps of papillae sculpturing on seed coats are required. On the other hand, in the phylogenetic tree of a low-copy nuclear gene, one independent evolutionary step is postulated to explain the current character states. In the latter hypothesis, the seed coat sculpturing also supports a monophyletic relationship for cosmopolitan Agrimonia and European endemic Aremonia. The seed coat sculpturing provides valuable information for inferring phylogenetic relationships at the generic level in the subtribe Agrimoniinae.
KeyWords: Aremonia, Hagenia, Leucosidea, Spenceria, Agrimonia, Agrimoniinae, Aremonia, Hagenia, Leucosidea, seed coat, Spenceria
주요어: 짚신나물, 짚신나물아족, 종피
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