Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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The taxonomic implication of trichome and epicuticular waxes in tribe Potentilleae (Rosaceae) in Korea

한국산 양지꽃족(Tribe Potentilleae: Rosaceae) 식물의 털과 표피상납질의 분류학적 중요성

  • Heo, Kyeong-In (Department of Biological Sciences, Sungkyunkwan University) ;
  • Lee, Sangryong (Botanical Gardens, Tohoku University) ;
  • Yoo, Manhee (Korea Environmental Research Inc) ;
  • Lee, Sangtae (Department of Biological Sciences, Sungkyunkwan University) ;
  • Kwon, Youl (Department of Biological Sciences, Sungkyunkwan University) ;
  • Lim, So Yeon (Department of Biological Sciences, Sungkyunkwan University) ;
  • Kim, Seonhee (Department of Biological Sciences, Sungkyunkwan University) ;
  • Kim, Seung-Chul (Department of Biological Sciences, Sungkyunkwan University)
  • 허경인 (성균관대학교 생명과학과) ;
  • 이상룡 (일본 토호쿠대학교 식물원) ;
  • 유만희 (한국환경기술개발(주) 부설생태연구소) ;
  • 이상태 (성균관대학교 생명과학과) ;
  • 권율 (성균관대학교 생명과학과) ;
  • 임소연 (성균관대학교 생명과학과) ;
  • 김선희 (성균관대학교 생명과학과) ;
  • 김승철 (성균관대학교 생명과학과)
  • Received : 2013.02.15
  • Accepted : 2013.05.13
  • Published : 2013.06.30
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Abstract

Using scanning electron microscope (SEM), we examined the trichomes on leaf and petiole and the epicuticular waxes on leaf surfaces for a total of 27 taxa representing two subtribes, Fragariinae and Potentillinae, of tribe Potentilleae (Rosaceae) in Korea. Four types of trichomes on adaxial and abaxial surface of leaves and petioles were identified. Type I (conical hirtellous) is the most common trichome type found in the majority of taxa in Fragariinae and Potentillinae. Type II (verruculose conical hirtellous) can be found only in Potentilla cryptotaeniae of sect. Conostylae of Potentillinae. Potentilla chinensis complex (sect. Conostylae) and P. egedii (sect. Letostylae) have type III trichome (crispate villous), while type IV (floccose villous) can be found in two species in sect. Conostylae, P. nivea and P. discolor. Both woolly hairs and conical hirtellous exist together in types III and IV. The same type of trichomes in leaves and petioles can be found across different subtribes and sections. In addition, different types of trichomes can be found even in a single species. Among the taxa which have type I trichome, the majority of subtribe Fragariinae and P. centrigrana and P. dickinsii complex have well developed epicuticular waxes on the surface of leaves. Sharing epicuticular waxes among the taxa across different subtribes appears to be correlated with their similar geographical distribution and ecological conditions. However, molecular phylogenetic study implies that the existence of epicuticular waxes could be also due to phylogenetic signal.

한국산 Potentilleae족의 Fragariinae아족과 Potentillinae아족에 포함된 8속 27분류군을 대상으로 주사전자 현미경을 이용하여 잎 양면과 엽병의 털 및 잎 표면의 미세구조를 관찰하였다. 연구결과 한국산 Potentilleae족의 잎과 엽병의 털은 크게 4가지 유형으로 구분되었다(Type I: conical hirtellous, type II: verruculose conical hirtellous, III: crispate villous, IV: floccose villous). Type I은 Fragariinae아족과 Potentillinae아족의 대부분의 분류군에서 관찰되었고, Type II는 유일하게 Potentillinae아족 Potentilla속 Conostylae절의 P. cryptotaeniae에서 나타났다. Type III은 Potentilla속 Conostylae절의 P. chinensis complex와 Leptostylae절의 P. egedii에서 나타났고, type IV는 Conostylae절의 P. discolor와 P. nivea에서 관찰되었다. 융모형인 Type III과 IV를 갖는 분류군들에서는 미세강모가 함께 나타났다. 서로 다른 아족 혹은 절간에 동일한 털 유형을 공유하고 있으며, 한 종에서 두 가지 이상의 털 유형이 관찰되기도 하였다. Type I에 해당하는 Fragariinae아족 다수의 분류군과 Potentillinae아족의 P. centigrana와 P. dickinsii complex에서는 잎 표면에 표피상납질이 발달하였다. 이들의 분포 패턴을 고려하였을 때 아족 간에 표피상납질을 공유하는 특성은 서식지의 생태적 환경과 관련되었을 가능성이 있다. 그러나 분자 계통분류학적인 연구와 비교한 결과 계통적인 영향 또한 관련되었을 것으로 판단된다.

Keywords

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