| Abstract Detail
Pteridological Section/AFS Canestraro, Bianca Kalinowski [1], Labiak, Paulo [2], Watkins, James [3]. The genus Polybotrya Willd. (Dryopteridaceae) of the Atlantic Forest of Brazil. The fern genus Polybotrya Willd. belongs to the family Dryopteridaceae Herter and contains 35 species restricted to the Neotropics. The center of diversity is in the Andes where 23 species occur, 12 of which are endemic. A total of 13 species are currently recognized as occurring in Brazil across the Atlantic Forest, Amazonian Forest, and Cerrado biomes. Five species are endemic to Brazil and primarily found in Atlantic forests: Polybotrya pilosa Brade, P. cylindrica Kaulf., P. speciosa Schott, P. semipinnata Fée e P. espiritosantensis Brade. Two other species are also present in the Atlantic forest, but exhibit broader range sizes: P. goyazensis Brade occurs both in the Atlantic Forest and the Cerrado, and P. sorbifolia Kuhn is registered in Central America and northern South America, including North, Midwest, and Southeast of Brazil. The aims of this study are to clarify taxonomic and nomenclatural problems of the 7 Atlantic Forest species in Brazil and to generate, keys, determine diagnostic morphological and anatomical characters. I will also investigate the occurrence of hybrids and polyploids among the populations; describe the gametophyte morphology; investigate the gametohyte origin and place of sporophyte recruitment and update the geographical distribution and conservation status of the species. Field work across SE Brazil was combined with extensive herbarium work to accomplish the aims of this work. Preliminary results shows that Polybotrya cylindrica has 2n = 41 and that several taxa have cordiform-thalloid gametophytes with distinctive unicellular papillate glandular hairs. Broader Impacts:
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1 - Federal University of Paraná, Botany, Cel. Francisco Heráclito dos Santos, 210, Jardim das Américas, Curitiba, Paraná, 80.520-540, Brasil
2 - Universidade Federal Do Parana, Botanica, Caixa Postal 19031, Curitiba-PR, N/A, 81531-980, Brazil
3 - Colgate University, Department of Botany, 129 Ho Science Center, 13 Oak Drive, Hamilton, NY, 13346-1338, USA, 315-228-7660
Keywords:
Caryology
ferns
South and Southeast of Brazil
Taxonomy.
Presentation Type: Poster:Posters for Sections
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PPD004
Abstract ID:553
Candidate for Awards:None |
