Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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A Palynological Study of the Korean Oldenlandia L. (Rubiaceae)

한국산 백운풀속(꼭두서니과)의 화분학적 연구

  • Nam, Bo Mi (School of Bioresource Science, Andong National University) ;
  • Chung, Gyu Young (School of Bioresource Science, Andong National University)
  • 남보미 (안동대학교 생명자원과학부) ;
  • 정규영 (안동대학교 생명자원과학부)
  • Received : 2011.03.10
  • Accepted : 2011.05.17
  • Published : 2011.06.30
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Abstract

The pollen of 5 taxa on Korean Oldenlandia L. was investigated by LM and SEM. The pollen grains were monads, $20.7-36.0{\mu}$m in polar length, with an equatorial diameter of $21.0-38.4{\mu}m$. The pollen shapes were oblate-spheroidal or spherical (P/E ratio 0.93-1.00). The apertures numbered 3-7 in number, colporate in shape, with a colpus length of $4.2-20.4{\mu}m$ and a colpus width of $2.6-3.4{\mu}m$. The sexine was $0.9-2.4{\mu}m$ in terms of its thickness, the surface pattern was reticulate, scabrate or neither. Based on these results, the size of the pollen grain, the number of apertures, and the surface pattern of the sexine were all useful for an interspecific classification. The genus Neanotis, established via the pollen characteristics, was thought to be reviewed in its entity regarding the continuous variation of generic characteristics.

한국산 백운풀속 5분류군의 화분을 광학현미경과 주사전자현미경으로 관찰하였다. 본 속의 화분은 모두 단립이며, 극축의 길이는 $20.7-36.0 {\mu}m$, 적도면의 너비는 $21.0-38.4{\mu}m$으로 세립 또는 중립이다. 화분의 형태는 P/E가 0.93-1.00로서 약단구형 내지 구형이다. 발아구의 수는 3-7개, 발아구의 형태는 공구형이며, 구구의 길이는 $14.2-20.4{\mu}m$, 너비는 $2.6-3.4{\mu}m$이다. 외표벽의 두께는 $0.9-2.4{\mu}m$이며, 표면무늬는 모두 망상으로 미립돌기가 있거나 없었다. 본 속의 화분형질 중 화분의 크기, 발아구의 수, 표면무늬에 미립돌기의 유무는 속내 종간 식별형질로서 매우 유용한 것으로 확인되었다. 또한 화분형질에 의해 설정된 Neanotis속은 형질의 연속적인 변이에 의해 속의 실체에 대하여 재검토되어야 할 것으로 판단되었다.

Keywords

References

  1. Bahadur, B. 1964. Pollen dimorphism in heterostyled Oldenlandia umbellata. Rhodora 66: 56-60.
  2. Dessein, S., A. Scheltensa, S. Huysmansa, E. Robbrechtb and E. Smetsa. 2000. Pollen morphological survey of Pentas (Rubiaceae-Rubioideae) and its closest allies. Rev. Palaeobot. Palynol. 112: 189-205. https://doi.org/10.1016/S0034-6667(00)00041-5
  3. Erdtman, G. 1960. The acetolysis method. A revised description. Svensk Bot. Tidsk. 54: 561-564.
  4. Erdtman, G., B. Berglund and J. Praglowski. 1961. An Introduction to a Scandinavian Pollen Flora. Grana Palynol. 2: 3-86. https://doi.org/10.1080/00173136109428945
  5. Erdtman, G. 1971. Pollen Morpholgy and Plant Taxonomy (Angiosperms). Hafner Publish. Co., New York.
  6. Huang, T. C. 1972. Pollen flora of Taiwan. National Taiwan University, Botany Department Press.
  7. Ikuse, M. 1956. Pollen Grains of Japan. Hirokawa Publishing Co., Tokyo.
  8. Lee, S. T. 1978. Phylogenetic Significance of Pollen Morphology. Korean J. Pl. Taxon. 8: 59-68.
  9. Lewis, W. H. 1965a. Cytopalynological study of African Hedyotideae (Rubiacaea). Ann. Missouri Bot. Gard. 52: 182-211. https://doi.org/10.2307/2394868
  10. Lewis, W. H. 1965b. Pollen morphology and Evolution in Hedyotis Subgenus Edrisia (Rubiaceae). Amer. J. Bot. 52: 257-264. https://doi.org/10.2307/2439937
  11. Lewis, W. H. 1966. The Asian Genus Neanotis Nomen novum (Anotis) and allied taxa in the Americas (Rubiaceae). Ann. Missouri Bot. Gard. 53: 32-46. https://doi.org/10.2307/2394973
  12. Nam, B. M., Y. S. Jang, M. S. Park, J. A. Eom and G. Y. Chung. 2010. A taxonmic study of the external morphology of the Korean Oldenlandia L. (Rubiaceae). Korean J. Pl. Taxon 40: 145-152 (in Korean).
  13. Neupane, S., S. Dessein and T. J. Motley. 2009. The Hedyotis-Oldenlandia-Kohautia complex (Rubiaceae) in Nepal: A study of fruit, seed and pollen characters and their taxonomic significance. Edinburgh J. Bot. 66: 371-390. https://doi.org/10.1017/S0960428609990035
  14. Radford, A. E., W. C. Dickison, J. R. Massey and C. R. Bell. 1974. Vascular Plant Systematics. Harper and Row, New York.
  15. Terrell, E. E. 1975. Relationships of Hedyotis fruticosa L. to Houstonia L. and Oldenlandia L.. Phytologia 31: 418-424.
  16. Terrell, E. E. and H. Robinson. 2007. Seed and capsule morphology in six genera of Hedyotideae (Rubiaceae): Thecagonum, Neanotis, Dentella, Kohautia, Pentodon, and Oldenlandiopsis. J. Bot. Res. Inst. Texas 1: 373-384.
  17. Verdcourt, B. 1976. Rubiaceae (Part 1), Oldenlandia. Flora of tropical east Africa. Crown Agents, London.
  18. Yamazaki, T. 1988. A new species of Neanotis (Rubiaceae) from E. Himalaya. J. Jap. Bot. 63:150-152.
  19. Yamasaki, T., 1993. Rubiaceae. In Flora of Japan, vol. a. Angiospermae and Dicotyledoneae and Sympetalae(a). Iwatsuki, K., T. Yamasaki, D. E. Boufford and H. Ohba (eds.), Kodansha, Tokyo.
  20. Zhang, D. and P. Xie. 2010. Pollen morphology supports the transfer of Wendlandia (Rubiaceae) out of Rondeletieae. Bot. J. Linn. Soc. 164: 128-141. https://doi.org/10.1111/j.1095-8339.2010.01080.x