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http://dx.doi.org/10.13047/KJEE.2017.31.4.349

A Taxonomic Reconsideration of the Genus Lemna L. (Lemnaceae) in Korea  

Kim, Yong-In (Dept. International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology)
Shim, Sang In (Dept. of Agronomy, Gyeongsang National Univ.)
Park, Jin Hee (Animal & Plant Resources Research Division, Freshwater Bioresources Research Bureau, Nakdonggang National Institute of Biological Resources (NNIBR))
Publication Information
Korean Journal of Environment and Ecology / v.31, no.4, 2017 , pp. 349-364 More about this Journal
Abstract
Duckweed family (Lemnaceae Martinov), including the genus Lemna L., is a typical floating aquatic perennial plant, and about five genera and 40 species in the family are in wide distribution around the world except the polar regions. The genus Lemna is the smallest and the simplest plant among the angiosperms. It has a characteristic of doubling every three days with fast vegetative propagation, which helps the organisms to increase in rapid growth. As such, the plant is ideal for environmental pollution assessment and toxicity test. Although taxonomists and scholars have used different scientific names for the species, many of them have agreed that there is only one member of species of the genus Lemna in Korea. Paying attention to the external morphological variation observed in the Korean genus Lemna, we conducted a molecular phylogenetic analysis to identify the entity of the Korean Lemna species and to investigate the possibility of two or more members of the species existing in Korea. We determined and aligned the DNA sequences of the atpF-H region of the chloroplast DNA in 37 populations of the nationally distributed Lemna species. The results showed that the sequence length of the cp DNA atpF-H region was 463-483 bp, the length of the aligned sequences was 488 bp, and the number of variation site in nucleotide sequences was 47. There were two types of aligned sequences of the cp DNA atpF-H region from 37 populations of Lemna species in Korea. The maximum parsimony analysis revealed that the Korean Lemna consists of two clades, and one of them had two subclades. The results suggest that, contrary to the general understanding, at least two taxa (L.aequinoctialis, L.minor) exist in Korea.
Keywords
AQUATIC PLANT; MOLECULAR PHYLOGENETIC ANALYSIS; MAXIMUM PARSIMONY ANALYSIS; CHLOROPLAST DNA atpF-H REGION;
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Times Cited By KSCI : 1  (Citation Analysis)
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