개미자리속 Saginella절 식물의 새로운 미기록종 보고: 선개미자리, 민개미자리(석죽과)
Two New Records of Alien Species Including New Section of Sagina L. (Caryophyllaceae) Recorded from the Republic of Korea
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초록
최근 국내 여러 지역에서 꽃이 4수성인 선개미자리와 민개미자리를 발견하였다. 국내에서 생육하는 개미자리속 식물은 모두 Spergella절에 속하는 5수성이지만 발견된 두 분류군은 4수성을 나타내는 Saginella절에 속한다. 또한 결실기의 꽃받침잎과 종자 등 형태학적 형질에서 국내 생육하는 개미자리속 식물과 큰 차이를 보였다. 본 종들의 명확한 실체 규명을 위해 형태적 주요 특성을 국외 도감, 문헌 등을 활용하여 비교 관찰하였다. 그 결과, 형태적으로 선개미자리는 엽연에 털이 있고, 꽃받침잎이 수평으로 펴지며, 가장자리가 적색이고, 종자 표면의 돌기가 볼록하다. 민개미자리는 소화경이 개화기에 휘어지고, 결실기에 직립하며, 꽃받침잎은 넓은 난형이고, 가장자리가 백색또는 황록색이며, 종자의 돌기가 납작한 특징으로 구분된다. 분자생물학적 분석에서 채집된 19 개체군은 Genbank에 등록된개미자리속 유전정보와 함께각각의 종으로 유집되어, 국내 분포하는 분류군의 실체를 지지하였다.
Abstract
Recently, in several regions of Korea, we discovered the occurrence of Sagina micropetala Rauschert and S. procumbens L. All the plants of the genus Sagina growing in Korea are 5-merous and belong to the sect. Spergella. However, the two taxa we discovered belong to the sect. Saginella and are 4-merous. In addition, morphological characteristics such as sepals during the fruiting season and seeds were significantly different from those of species of the genus Sagina that occur in Korea. To clearly identify these species, we compared and observed their primary morphological characteristics using illustrated books and literature. Morphologically, S. micropetala exhibits the following traits: pubescence along the leaf margin, horizontally spreading sepals with red margins, and convex protrusions on the seed surface. In contrast, S. procumbens can be distinguished by its pedicels, which are curved during the flowering season and erect during the fruiting season. This plant also has broadly ovate sepals with white or yellowish-green margins, and flat seed surface protrusions. In terms of molecular analyses, 19 samples of Sagina were divided into two clades (S. micropetala and S. procumbens), confirming the taxonomic identity of the Sagina spp.
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