Pollen morphology of Patrinieae Höck (Valerianaceae)

마타리족(Patrinieae Höck, 마타리과)의 화분형태학적인 연구

  • Jung, Eun-Hee (Department of Biology & Institute of Global Environment, Kyung Hee University) ;
  • Hong, Suk-Pyo (Department of Biology & Institute of Global Environment, Kyung Hee University)
  • 정은희 (경희대학교 이과대학 생물학과·지구환경연구소) ;
  • 홍석표 (경희대학교 이과대학 생물학과·지구환경연구소)
  • Received : 2008.03.28
  • Accepted : 2008.04.26
  • Published : 2008.06.30

Abstract

Pollen grains of 17 taxa (14 species with two additional subspecies and one variety) of genera Patrinia Juss. and Nardostachys DC. in tribe Patrinieae (Valerianaceae) were studied using light microscope, scanning electron microscope, and transmission electron microscope. Pollen grains are medium ($37.41{\times}43.60{\mu}m$ - $45.65{\times}48.50{\mu}m$) to large ($54.88{\times}59.41{\mu}m$ - $61.70{\times}71.00{\mu}m$) in size, tricolpate (rarely tetracolpate) with the characteristic halo surrounding the aperture. In equatorial view, the pollen is oblate to subprolate, and in polar view, it is mostly circular or rarely 3-lobed. Two major pollen types are recognized on the basis of exine sculpturing patterns; Type I: Exine is composed of echinae together with sparse or dense microechinae, and verrucae shallow or rarely absent (Nardostachys and sections Paleopatrinia, and Monanadropatrinia of Patirinia). - Type II: Exine is composed of massive echinae together with dense microechinae, and prominent verrucae (section Centrotrinia of Patrinia). In TEM sections, columellae are extended from the footlayer into verrucae, and exine thickness is uniform at the pole and equator. Additionally, the infrageneric classification systems of the Patrinieae were evaluated on the basis of the present data.

마타리족(Patrinieae $H{\ddot{o}}ck$, Valerianaceae)에 속하는 마타리속과 Nardostachys속의 17분류군(14종과 추가된 2아종, 1변종)의 화분을 광학현미경과 주사전자현미경, 그리고 투과전자현미경으로 관찰하였다. 화분의 크기는 주로 중립($37.41{\times}43.60{\mu}m$ - $45.65{\times}48.50{\mu}m$)에서 대립($54.88{\times}59.41{\mu}m$ - $61.70{\times}71.00{\mu}m$)까지 나타나고, 발아구는 3구형이며 드물게 4구형이다. 화분립 발아구의 가장자리에는 'halo'라는 마타리과 화분에서 나타나는 공통적인 형질을 갖고 있으며, 화분립의 모양은 적도면에서 단구형에서 약장구형이고, 극축면은 3갈래로 갈라지거나 원형이다. 마타리족의 화분은 표면무늬에 따라서 크게 두가지 유형으로 구별되어진다; (1) Type I: 과립상돌기(verrucae)가 약간 발달하거나 거의 없고, 자상돌기(echinae)가 과립상돌기 위에 발달하며 미세자상돌기(microehinae)가 산재한 형태(Nardostachys속, 마타리속의 Paleopatrinia절, Monanadropatrinia절), (2) Type II: 과립상 돌기가 잘 발달하고, 자상돌기가 과립상돌기 위에 매우 크게 발달하며 미세자상돌기가 조밀하게 화분표면을 덮고 있는 형태(마타리속의 Centrotrinia절). 투과전자현미경을 이용한 연구에서 원주층은 기저층으로부터 과립상돌기로 연결되고, 표벽의 두께는 극과 적도에서 동일하다. 본 연구결과를 통해 마타리족의 분류체계가 검토되었다.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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