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Diversity, classification, and nomenclature of cultivated plants, weeds, microbes, and insect-pests
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Centers of diversity of crops and wild genetic diversity
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Learn introductory biotechnology and biodiversity with Braimy- B.Sc Agriculture
About Lesson

a) Sap transmission test:

  • Virus are taken from the test plant
  • Grinding with a mortar or pestle
  • Sap is smeared onto the leaf of an indicator plant.
  • If virus present in the sap, the indicator shows symptoms of concerned virus.

b) Serological test/ ELISA test:

  • Done based on antibody reaction.
  • Add a drop of centrifuged sap from a test plant to a drop of antiserum
  • If virus present precipitates because of presence of specific antibody in the blood.

c) DNA finger prints:

  • Which exhibit no visible symptoms.

d) Visible symptoms

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