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Mycologia, 95(3), 2003, pp. 474-479.
© 2003 by The Mycological Society of America

Primers are designed for amplification and direct sequencing of ITS region of rDNA from Myxomycetes


María P. Martín 1
Carlos Lado

     Real Jardín Botánico, C.S.I.C., Plaza de Murillo 2, 28014 Madrid, Spain

Steinar Johansen

     Department of Molecular Biotechnology, Institute of Medical Biology, University of Tromsø, N-9037 Tromsø, Norway

Four new primers were designed, based on comparison of Physarum polycephalum sequences retrieved from Genbank (primers PHYS-5 and PHYS-4) and our own sequences (primers PHYS-3 and PHYS-2), to amplify the ITS regions of rDNA, including the 5.8S gene segment from Lamproderma species. Sequencing analysis shows that Lamproderma contains ITS1-5.8S-ITS2 regions of approximately 900 bp, which is similar in size to most eukaryotes. However, the corresponding region in another common myxomycete, Fuligo septica, is more than 2000 bp due to the presence of large direct-repeat motifs in ITS1. Myxomycete rDNA ITS regions are interesting both as phylogenetic markers in taxonomic studies and as model sequences for molecular evolution.

Key words: DNA amplification, Lamproderma, ribosomal DNA, sequencing






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Copyright © 2003 by The Mycological Society of America.