Molecular Biology and Evolution, Vol 16, 114-126, Copyright © 1999 by Society for Molecular Biology and Evolution
A Holst-Jensen, M Vaage, T Schumacher and S Johansen
We have characterized structural features and the distribution pattern of
nuclear group I introns found in ribosomal DNA (rDNA) of closely related
plant pathogenic fungi of the family Sclerotiniaceae. Sixteen introns, at
two distinct positions in the small-subunit (SSU) and large- subunit (LSU)
rDNA, were sequenced and analyzed among the 29 taxa included in the initial
screening. Genera found to contain introns were Botrytis, Dumontinia,
Encoelia, Grovesinia, Myriosclerotinia, and Sclerotinia.
Secondary-structure analyses of the group I introns concluded that all
belong to the common IC1 subclass. Interestingly, the SSU rDNA intron from
Myriosclerotinia caricisampullacea contains an insertion-like sequence
extension which may be a relic of an open reading frame. Incongruent
branching patterns of intron-based and rDNA- based (internal transcribed
spacer) phylogenetic trees suggest that the fungal host genomes and the
group I introns do not share a common evolutionary history. A model to
explain how horizontal intron transfers may have occurred among the closely
related fungal taxa is proposed.
ORIGINAL ARTICLE
Structural characteristics and possible horizontal transfer of group I introns between closely related plant pathogenic fungi
Department of Biology, University of Oslo, Norway. arne.holst- jensen@vetinst.no
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  B. Jacobs, F. Lens, and E. Smets Evolution of fruit and seed characters in the Diervilla and Lonicera clades (Caprifoliaceae, Dipsacales) Ann. Bot., August 1, 2009; 104(2): 253 - 276. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 L. Sandegren and B.-M. Sjoberg Distribution, Sequence Homology, and Homing of Group I Introns among T-even-like Bacteriophages: EVIDENCE FOR RECENT TRANSFER OF OLD INTRONS J. Biol. Chem., May 21, 2004; 279(21): 22218 - 22227. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. J. Davies, T. G. Barraclough, M. W. Chase, P. S. Soltis, D. E. Soltis, and V. Savolainen Darwin's abominable mystery: Insights from a supertree of the angiosperms PNAS, February 17, 2004; 101(7): 1904 - 1909. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. P. Jackson and M. A. Charleston A Cophylogenetic Perspective of RNA-Virus Evolution Mol. Biol. Evol., January 1, 2004; 21(1): 45 - 57. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. B. Lickey, K. W. Hughes, and R. H. Petersen Variability and Phylogenetic Incongruence of an SSU nrDNA Group I Intron in Artomyces, Auriscalpium, and Lentinellus (Auriscalpiaceae: Homobasidiomycetes) Mol. Biol. Evol., November 1, 2003; 20(11): 1909 - 1916. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. Jumpponen, K. K. Newsham, and D. J. Neises Filamentous ascomycetes inhabiting the rhizoid environment of the liverwort Cephaloziella varians in Antarctica are assessed by direct PCR and cloning Mycologia, May 1, 2003; 95(3): 457 - 466. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. A. Kelchner Group II introns as phylogenetic tools: structure, function, and evolutionary constraints Am. J. Botany, October 1, 2002; 89(10): 1651 - 1669. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
N. Nikoh and T. Fukatsu Evolutionary Dynamics of Multiple Group I Introns in Nuclear Ribosomal RNA Genes of Endoparasitic Fungi of the Genus Cordyceps Mol. Biol. Evol., September 1, 2001; 18(9): 1631 - 1642. [Abstract] [Full Text] [PDF]
|
|