Viroids: unusual small pathogenic RNAs.

  title={Viroids: unusual small pathogenic RNAs.},
  author={Anna G{\'o}ra-Sochacka},
  journal={Acta biochimica Polonica},
  volume={51 3},
Viroids are small (about 300 nucleotides), single-stranded, circular, non-encapsidated pathogenic RNA molecules. They do not code for proteins and thus depend on plant host enzymes for their replication and other functions. They induce plant diseases by direct interaction with host factors but the mechanism of pathogenicity is still unknown. They can alter the expression of selected plant genes important for growth and development. Viroids belong to two families, the Avsunviroidae and the… CONTINUE READING