| the sporadic occurrence of a group i intron-like element in the mtdna rnl gene of ophiostoma novo-ulmi subsp. americana. | the presence of group i intron-like elements within the u7 region of the mtdna large ribosomal subunit rna gene (rnl) was investigated in strains of ophiostoma novo-ulmi subsp. americana from canada, europe and eurasia, and in selected strains of o. ips, o. minus, o. piceae, o. ulmi, and o. himal-ulmi. this insertion is of interest as it has been linked previously to the generation of plasmid-like mtdna elements in diseased strains of o. novo-ulmi. among 197 o. novo-ulmi subsp. americana strains ... | 2008 | 18406119 |