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Abstract Detail


Pteridological Section/AFS

Li, Fay-Wei [1], Tan, Benito [2], Moran, Robbin [3], Rouhan, G. [4], Wang, Chun-Neng [5].

Identifying a Mysterious Aquatic Fern Gametophyte.

A mysterious liverwort-like, aquatic plant popularly traded worldwide in aquarium market has been identified as an undescribed fern gametophyte. The thallus is ribbon-like, branched, and one-cell thick throughout with few antheridia. No associated sporophyte has been discovered.
Phylogenetic analyses performed by maximum parsimony using rbcL (1241 bp) and accD (582 bp) data revealed that the gametophyte is nested within Lomariopsis with high bootstrap supports. Moreover, further investigation based on the trnL-F (340 bp) intergenic spacer from 31 Lomariopsis species suggested L. lineata might be the closest species to the mysterious gametophyte. The trnL-F sequences from L. lineata and the mysterious gametophyte show 97.6% identity and share an 8-base-long gap. In field observations of Lomariopsis in Taiwan, we have found gametophytes with similar morphology bearing young sporophytes.
Because it is easy-cultured, one-cell thick, and of indeterminate growth, the gametophyte might be useful in physiological studies such as light-induced responses in the future.


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1 - National Taiwan University, Department of Life Science, No. 1, Sec 4, Roosevelt Road, Taipei, 106, Taiwan, ROC
2 - National University of Singapore, Department of Biological Sciences, Singapore
3 - New York Botanical Garden, Institute of Systematic Botany, 200Th Street & Southern Boulevard, Bronx, New York, 10458-5126, USA
4 - Institut de Recherche pour le Développement US084, Muséum National d’H, 16 rue Buffon, 75005, Paris, France
5 - National Taiwan University, Department of Life Science, No. 1, Sec 4, Roosevelt Road, Taipei, 106, Taiwan

Keywords:
fern gametophytes
molecular identification
aquatic
Lomariopsis.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P58002
Abstract ID:911


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