Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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The nutlet morphology of the genus Glechoma L. (Lamiaceae) and its related taxa

긴병꽃풀속(Glechoma L. 꿀풀과) 및 근연분류군의 소견과 형태에 관한 연구

  • Jang, Tae-Soo (Laboratory of Plant Systematics, Department of Biology, Institute of Basic Sciences, Kyung Hee University) ;
  • Hong, Suk-Pyo (Laboratory of Plant Systematics, Department of Biology, Institute of Basic Sciences, Kyung Hee University)
  • 장태수 (경희대학교 이과대학 생물학과 & 기초과학연구소) ;
  • 홍석표 (경희대학교 이과대학 생물학과 & 기초과학연구소)
  • Received : 2010.03.03
  • Accepted : 2010.03.16
  • Published : 2010.03.31
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Abstract

The nutlet morphology and pericarp structure of 14 taxa (4 taxa of the genus Glechoma and related taxa) were studied by light and scanning electron microscopy, and a detailed description of nutlet morphological features for all examined taxa is provided. The shape of the nutlet is ovate to elliptic. Its size is 1.36-3.83 mm in length and 0.80-2.65 mm in width. The largest one was found in Marmoritis rotundifolia, while the smallest one was in Agastache nepetoides. Three different surface types were recognized in the studied taxa based on differences in cell outline and cell boundary relief (rectangular, pitted, and ridged negative reticulate-cell). Three types of trichome (uni-cellular non-glandular trichome, multi-cellular non-glandular trichome, and peltate glandular trichome) were distributed in the nutlets. The pericarp is formed in three layers (i.e., exocarp, mesocarp, and endocarp including sclenchyma tissue), and the pericarp in the studied species is $39.0-237.5{\mu}m$ thick. The morphological and anatomical features (the nutlet shape, surface type, and trichome distribution) in the genus Glechoma and related taxa are described and discussed.

Glechoma속 4종(G. grandis, G. hederacea, G. hirsuta, G. longituba)과 Nepetinae아족 중 Glechoma속과 가장 근연 분류군인 Agastache속, Dracocephalum속, Marmoritis속, Meehania속, Nepeta속 일부 분류군의 소견과 특징을 주사전자현미경과 광학현미경을 통하여 분류학적 유용성을 검토하였다. 연구된 분류군의 소견과 모양은 난형에서 타원형으로 나타났다. 소견과 크기는 길이 1.36-3.83 mm, 폭 0.80-2.65 mm로, Marmoritis rotundifolia가 가장 크고, Agastache nepetoides가 가장 작았다. 소견과의 표면은 세 가지 유형으로 나타났다. Type I은 Agastache속으로 표면은 불규칙적으로 돌출되며, 장방형의 세포가 연결되는 유형이고, Type II는 Dracocephalum속으로 표면은 불규칙적이며, 원형의 세포가 움푹 들어간 유형이다. Type III은 Glechoma속, Marmoritis속, Meehania속, Nepeta속으로 표면은 매끄러우며, 세포가 능선으로 연결된 망상형이다. 모용(다세포성 비선모, 단세포성 비선모, 방패형 선모)은 일부 분류군에서 관찰되었다. 과피는 외과피와 중과피, 내과피로 구성되며, 과피의 두께($39.0-237.5{\mu}m$)가 분류군간 큰 차이를 보였다. Glechoma속과 근연속 일부 근연분류군에 대한 소견과의 형태학적 해부학적 형질(소견과의 모양, 표면 무늬, 선모와 모용 분포, 해부학적 구조)을 기재하였고, 그 분류학적 유용성에 대해 논의하였다.

Keywords

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