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Molecular Biology and Evolution, Vol 12, 883-886, Copyright © 1995 by Society for Molecular Biology and Evolution

ORIGINAL ARTICLE

A common group I intron between a plant parasitic fungus and its host

H Nishida and J Sugiyama
Institute of Molecular and Cellular Biosciences, University of Tokyo, Japan.

The self-splicing RNAs known as group I introns exist in many organisms, but their distribution is difficult to explain. We hypothesize that group I introns have been transferred between a parasite and its host. We describe here the discovery of a common group I intron sequence between a plant-parasitic fungus, Protomyces inouyei, and its host, Youngia japonica. It strongly supports our theory that the group I intron had been transferred from the host plant to the parasitic fungus in the course of evolution.
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