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Related Experiment Videos

Host-directed processing of Citrus exocortis viroid.

J A Szychowski1, G Vidalakis1, J S Semancik1

  • 1Department of Plant Pathology, University of California, Riverside, CA 92521, USA.

The Journal of General Virology
|January 22, 2005
PubMed
Summary

Prolonged Citrus exocortis viroid (CEVd) infection in tomato generated novel enlarged viroid variants. Host specificity influences CEVd variant recovery and processing, highlighting temporal population variability.

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Area of Science:

  • Plant virology
  • Molecular biology
  • Genetics

Background:

  • Citrus exocortis viroid (CEVd) is a significant plant pathogen.
  • Understanding viroid evolution and host interactions is crucial for disease management.

Purpose of the Study:

  • To investigate the molecular and biological characteristics of CEVd variants arising from prolonged infection in a tomato hybrid.
  • To assess the host specificity and transmission dynamics of these CEVd variants.

Main Methods:

  • Gel electrophoresis for detecting enlarged viroid structures.
  • Sequence analysis to identify genetic changes in CEVd variants.
  • Transmission tests to various plant hosts.

Main Results:

Related Experiment Videos

  • Identification of two new enlarged CEVd variants (D-87, D-76) and three transient forms (D-38, D-40, D-43).
  • Sequence analysis revealed consistent changes near the terminal repeat region.
  • Transmission to CEVd hosts yielded diverse progeny, including reversions and enlargements.
  • Unsuccessful transmission to citrus hosts (Citrus, Poncirus, Fortunella).

    • Conclusions:

    • Host specificity plays a critical role in the recovery and processing of CEVd variants.
    • CEVd populations exhibit temporal variability in progeny recovery.
    • The study demonstrates the complex interactions between CEVd and its hosts, leading to variant diversification.