Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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Numerical taxonomic study of Najas L. (Hydrocharitaceae) in Korea

한국산 나자스말속(Najas L.)의 수리분류학적 연구

  • 나혜련 ((주)동북아식물연구소) ;
  • 최홍근 (아주대학교 자연과학대학 생명과학과)
  • Received : 2012.04.16
  • Accepted : 2012.05.23
  • Published : 2012.06.30
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Abstract

We conducted principal component analyses using the thirty two quantitative characteristics of Najas from South Korea to examine the morphological variation and diagnostic characteristics. As a result of our investigation and the morphometric analyses, each taxon could be identified using the leaf width, shape of the leaf sheath, number of teeth on the leaf margin, number of anther cells, number of areoles in each longitudinal row of seeds, and the ratio of the areole width to the length. Dioecious Najas marina was clearly distinguished from the other monoecious taxa (N. graminea, N. gracillima, N. minor, N. oguraensis, and N. orientalis) by the larger size of the stem, the leaf, the flower and the fruit. The monoecious taxa could be identified using vegetative characteristics except for N. minor and N. oguraensis, which were distinct from each other according to the locule number in the staminate flower.

국내에 분포하는 나자스말속(Najas L.) 분류군의 형태적 변이를 파악하고 각 분류군의 식별형질을 검토하기 위하여 32개 정량형질을 이용하여 주성분분석을 수행하였다. 나자스말속의 분류군에서 잎의 너비, 엽초의 모양, 엽연의 거치수, 약실의 수, 한 줄에 배열하는 종자의 그물눈 수와 길이의 비 등이 유용한 식별형질로 파악되었다. 자웅이주인 민나자스말(N. marina)은 잎과 줄기, 수꽃과 암꽃, 열매가 대형으로서 자웅동주인 다른 분류군들과 뚜렷하게 구분되었다. 자웅동주인 분류군들 중에서 나자스말(N. graminea), 실나자스말(N. gracillima), 동아나자스말(N. orientalis)은 영양 형질에 의하여 식별이 가능하지만, 톱니나자스말(N. minor)과 큰톱니나자스말(N. oguraensis)은 수꽃에 있는 약실의 수에 의해서만 구분되었다.

Keywords

References

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