Recent Topics Posters
Mosquera Espinosa, Ana Teresa , Otero Ospina, J. Tupac , Bayman, Paul .
Distribution of mycorrhizal Rhizoctonia fungi in Colombian orchids.
Orchids are obligately mycorrhizal for seed germination, and many orchids are also mycorrhizal as adults. The majority of their mycorrhizal fungi are in the form-genus Rhizoctonia and its teleomorphs Ceratobasidium, Thanatephorus, Tulasnella and Sebacina. Colombia is one of the richest countries in orchid diversity, but its orchid mycorrhizal fungi are unknown. Likewise, it is unclear if epiphytic orchids associate with the same mycorrhizal fungi as terrestrial orchids. Basidiomycetes were isolated from roots of Colombian orchids and identified by sequencing the nuclear ribosomal ITS region and BLAST searches. The majority of the fungi grouped in Ceratobasidium. Differences between fungi from epiphytes and terrestrial orchids were not observed. Some sequences were closely related to sequences of fungi from epiphytic orchids in Puerto Rico. The results suggest that Ceratobasidium associates with many Colombian orchids, independent of habitat.
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1 - Universidad Nacional de Colombia - Sede Palmira, Programa de Posgrado en Suelos, Carrera 32 Chapinero, Vía Candelaria, Palmira , Valle del Cauca, Colombia
2 - Universidad Nacional de Colombia - Sede Palmira, Programa de Posgrado en Suelos, c, Palmira , Valle del Cauca, Colombia
3 - Univ Puerto Rico - Rio Piedras, Biologia, PO Box 23360, San Juan, PR, 00931-3360, USA
Presentation Type: Recent Topics Poster
Location: Event Tent/Cliff Lodge
Date: Monday, July 27th, 2009
Time: 5:30 PM