Hwan Su Yoon

Bigelow Laboratory for Ocean Sciences

E-mail: hsyoon@bigelow.org
kelpyoon@hanmail.net

Research Interests

Our planet displays an enormous biodiversity of living forms. Photosynthetic eukaryotes (e.g., algae and plants), comprise a majority of this species richness. In total, there are about ten different kinds of photosynthetic organelles (plastids). The question of when and how these plastids originated is a fundamental issue in biology. My research interests focus on these important questions as below,

• Evolution of the Chromist Plastids
• Divergence Time Estimation using a Molecular Clock
• Evolution of the Dinoflagellate Plastids
• Red and Brown Algal Molecular Phylogenies and Biodiversity

Education:

Ph.D. Botany, Chungnam National University, Korea (1994-1999).
Molecular phylogenetic relationships of the Alariaceae and Laminariaceae (Phaeophyta).
M.S. Biology, Chungnam National University, Korea (1992-1994).
Morphology, hybridization and systematics of Ceramium kondoi (Ceramiaceae , Rhodophyta).
B.S. Biology, Chungnam National University, Korea (1988-1992).
Honor thesis, Morphology and karyotype of Convallaria majalis (Liliaceae) in Korea.

Experience:

Senior Scientist: Bigelow Laboratory for Ocean Sciences, March 2007 - present.
Senior Scientist: University of Iowa, October 2004 - 2007. Assembling the tree of
eukaryotic microbial diversity, NSF.
Post Doctoral Research Position: University of Iowa, August 2001 - September
2004.Secondary symbiotic origin of algal plastids and the phylogeny of the
Bangiophycidae (Rhodophyta), NSF DEB-0107754.
Post Doctoral Research Position: Iowa University, July 2000 - June 2001.The origin of
algal plastids and Gracilaria plastid genomics (Rhodophyta), KOSEF.

Lecturer Position: Chungnam National University, March 2000 - July 2000. Experimental
plant systematics.
Teaching Assistant: Chungnam National University, September 1995 - December 1998.
Experimental Plant Systematics, Experimental Phycology, Introduction of General Biology.

Honors:

2000

1999

Korean Science and Engineering Foundation (KOSEF), Postdoctoral Researcher
Fellow with Dr. Debashish Bhattacharya, University of Iowa , USA .
Korean Science and Engineering Foundation (KOSEF), Intern Researcher Fellow
(= Postdoctoral Researcher Fellow) with Dr. Sung Min Boo , Chungnam National
University , Korea .

This is an electronic version of an article published in Journal of Phycology ©2006,
The Phycological Society of America.

Publications:

Yoon, H.S., C. Ciniglia, M. Wu , J. Comeron, G. Pinto, A. Pollio, and D. Bhattacharya. Establishment of endolithic populations of extremophilic Cyanidiales (Rhodophyta). BMC Evol. Biol. 2006 Oct 5;6(1):78 PDF

Yoon, H.S., A. Reyes-Prieto, M. Melkonian and D. Bhattacharya. 2006. Minimal plastid genome evolution in the Paulinella endosymbiont. Curr Biol. 2006 Sep 5;16(17):R670-2. PDF

Hwan Su Yoon, Jeremiah D. Hackett and Debashish Bhattacharya. 2006. A genomic and phylogenetic perspective on endosymbiosis and algal origin. Journal of Applied Phycology (2006) 18: 475–481. PDF

Yoon, H.S., K.M. Müller, R.G. Sheath, F.D. Ott, and D. Bhattacharya. 2006. Defining the major lineages of red algae (Rhodophyta). J. Phycol. 42, 482-492. PDF

Hackett, J.D., T.E. Scheetz, H.S. Yoon, M.B. Soares, M.F. Bonaldo, T.L. Casavant, and D. Bhattacharya. 2005. Insights into a dinoflagellate genome through expressed sequence tag analysis. BMC Genomics 6:80. PDF

Hwan Su Yoon, Jeremiah D. Hackett, Kristy B. Lidie, Frances M. Van Dolah, Tetyana Nosenko, and Debashish Bhattacharya. 2005. Tertiary endosymbiosis driven genome evolution in dinoflagellates. Molecular Biology and Evolution May;22(5):1299-308. PDF

Hwan Su Yoon, Debashish Bhattacharya, and Jeremiah D. Hackett. 2004. A genomic and phylogenetic perspective on algal origin. Hydrobiologia. PDF

Claudia Ciniglia*, Hwan Su Yoon*, Antonino Pollio, Gabrielle Pinto, Debashish Bhattacharya. 2004. Hidden biodiversity of the extremophilic Cyanidiales red algae. Molecular Ecology 13: 1827-1838 (*equally contributed author). PDF

Hwan Su Yoon, Jeremiah D. Hackett, Claudia Ciniglia, Gabrielle Pinto, Gabrielle Pinto, Debashish Bhattacharya. 2004. A Molecular Timeline for the Origin of Photosynthetic Eukaryotes. Molecular Biology and Evolution 21: 809-818. PDF

Jeremiah D. Hackett, Hwan Su Yoon, Bento M. Soares, Maria F. Bonaldo, Thomas L. Casavant, Todd L. Sheetz, Tetyana Nozenko, Debashish Bhattacharya. 2004. Migration of the plastid genome to the nucleus in a peridinin Dinoflagellate. Current Biology 14: 213-218. PDF

Debashish Bhattacharya, Hwan Su Yoon, and Jeremiah D. Hackett. 2004. Photosynthetic Eukaryotes unite: Endosymbiosis connects the Dots. BioEssays 26.1: 50-60. PDF

Tae Oh Cho, Ga Yeon Cho, Hwan Su Yoon, Sung Min Boo, and Wook Jae Lee. 2003. New records of Myelophycus cavus (Scytosiphonaceae, Phaeophyceae) in Korea and the taxonomic position of the genus on the basis of a plastid DNA phylogeny. Nova Hedwigia 76: 381-397.

Gabriele Pinto, Patrizia Albertano, Claudia Ciniglia, Salvatore Cozzolino, Antonino Pollio, Hwan Su Yoon, Debashish Bhattacharya. 2003. Comparative approaches to the taxonomy of the genus Galdieria Merola (Cyanidiales , Rhodophyta). Cryptogamie Algologie 24: 13-32 .

Kyung Suk Seo, Tae Oh Cho, Ji Sun Park, Eun Chan Yang, Hwan Su Yoon, and Sung Min Boo. 2003. Morphology, basiphyte range, and plastid DNA phylogeny of Campylaephora borealis stat. nov. (Ceramiaceae , Rhodophyta). Taxon 52: 9-19 .

Jeremiah D. Hackett, Lucie Maranda , Hwan Su Yoon and Debashish Bhattacharya. 2003. Phylogenetic evidence for the cryptophyte origin of the plastid of Dinophysis (Dinophysiales , Dinophyceae). Journal of Phycology 39: 440-448.

Hwan Su Yoon , Jeremiah Hackett, Gabriele Pinto, and Debashish Bhattacharya. 2002. The single, ancient origin of Chromist plastids. Proceedings of the National Academy of Sciences of the United States of America 99 (24): 15507-15512. (on the cover photo).

Hwan Su Yoon, Jeremiah D. Hackett, and Debashish Bhattacharya. 2002. A single origin of the peridinin -, and fucoxanthin -containing plastids in dinoflagellates through tertiary endosymbiosis. Proceedings of the National Academy of Sciences of the United States of America 99(18): 11724-11729. (on the commentary).

Hwan Su Yoon, Ju Yeon Lee, Sung Min Boo, and Debashish Bhattacharya. 2001. Phylogeny of Alariaceae, Laminariaceae and Lessoniaceae (Phaeophyta) based on plastid-encoded RuBisCo spacer and nuclear-encoded ITS sequence comparisons. Molecular Phylogenetics and Evolution 21(2): 231-243.

Ga Youn Cho, Hwan Su Yoon, Han- Gu Choi, Sung Min Boo, Kazuhiro Kogame. 2001. Phylogeny of the family Scytosiphonaceae (Phaeophyta) from Korea based on sequences of plastid-encoded RuBisCo spacer region. Algae 16(2): 145-150.

Sung Min Boo and Hwan Su Yoon. 2000. Molecular relationships of giant kelp (Phaeophyceae). Algae 15: 13-16.

Hwan Su Yoon and Sung Min Boo. 1999. Phylogeny of Alariaceae (Phaeophyta) with special reference to Undaria based on sequences of the RuBosCo spacer region. Hydrobiologia 398/399: 47-55.

Yun Kyung Lee, Hwan Su Yoon, Taizo Motomura, Yung Jin Kim and Sung Min Boo. 1999. Phylogenetic relationships between Pelvetia and Pelvetiopsis (Fucaceae, Phaeophyta) inferred from sequences of the RuBisCo spacer region. European Journal of Phycology 34: 205-211.

Sung Min Boo , Wook Jae Lee, Hwan Su Yoon , Atsushi Kato and Hiroshi Kawai. 1999. Molecular phylogeny of Laminariales (Phaeophytceae) inferred from small subunit ribosomal DNA sequences. Phycological Research 47(2): 109-114.

Hwan Su Yoon, Byeong Mee Min, Jae Wook Bang and Sung Min Boo. 1999. Morphology and karyotype of Convallaria majalis (Liliaceae) in Korea. Korean Journal of Environmental Biology 17 (3): 371-378.

Wook Jae Lee, Hwan Su Yoon and Sung Min Boo. 1998. Phylogenetic relationships of Pelvetia and Pelvetiopsis (Phaeophyceae) based on small subunit ribosomal DNA sequences. Journal of Plant Biology 41(2): 103-109.

Wook Jae Lee, Hwan Su Yoon and Sung Min Boo. 1997. Marine algal community of Gyoungniman Islets on the West Sea of Korea. Algae 12(2): 139-144.

Kim, Sun Ran, Hwan Su Yoon, Sung Min Boo and Sang Gi Paik. 1997. Morphological and random amplified polymorphic DNA features in populations of Ceramium kondoi (Rhodophyta). Journal of Plant Biology 40(1): 27-32.

Sung Min Boo and Hwan Su Yoon. 1993. Systematic studies of Ceramium kondoi (Ceramiaceae , Rhodophyta) in the field and in culture. Korean Journal of Phycology 8(2): 179-189.