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Some like it hot: citrus tristeza virus strains react differently to elevated temperature.

S J Cowell1, S J Harper2, W O Dawson2

  • 1Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA. sjcowell@ufl.edu.

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Higher temperatures impact citrus tristeza virus (CTV) populations, altering their structure. This effect is strain-specific and depends on the host plant, influencing viral infection dynamics.

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Area of Science:

  • Plant pathology
  • Virology
  • Molecular biology

Background:

  • Plant viruses often exist as mixed populations within a host.
  • Viral population dynamics are critical for infection success but poorly understood.
  • Temperature is known to affect individual virus particles.

Purpose of the Study:

  • To investigate the influence of temperature on viral population structure.
  • To determine if temperature affects citrus tristeza virus (CTV) populations.
  • To assess host-dependent temperature effects on CTV strains.

Main Methods:

  • Observation of citrus tristeza virus (CTV) populations.
  • Experimentation under controlled temperature conditions (25°C vs. 36°C).
  • Utilizing different host plants to evaluate host-dependent effects.

Main Results:

  • A higher summer temperature (36°C) altered the population structure of some CTV strains.
  • The observed temperature-induced changes in CTV populations were host-dependent.
  • Not all CTV strains exhibited altered population structures under elevated temperatures.

Conclusions:

  • Temperature can significantly influence the population dynamics and structure of plant viruses like CTV.
  • Host-virus interactions mediate the impact of temperature on viral populations.
  • Understanding these dynamics is crucial for managing viral diseases in agriculture.