Ustilago Maydis Virus-Encoded Killer System

  • Y. Koltin
Part of the Basic Life Sciences book series (BLSC, volume 40)


The detection of the first fungal viruses was the byproduct of the search for antiviral agents from fungi (9). The detection of Ustilago maydis viruses was the byproduct of a study on incompatibility in this organism. Ustilago maydis, known also as the corn smut, is a fungal plant pathogen. As a heterothallic species it goes through a sexual cycle on corn plants, and the interaction between sexually undifferentiated mates is regulated by two incompatibility genes, a and b. The formation of the heterokaryon (Fig. 1) and the infection of plants occur between mates that differ in both incompatibility genes.


Sensitive Strain Yeast Killer dsRNA Molecule Inhibitory Phenotype dsRNA Segment 
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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • Y. Koltin
    • 1
  1. 1.Department of MicrobiologyTel-Aviv UniversityRamat AvivIsrael

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