Potato Review Group

Contents

Taking whole leaf samples

Taking petiole samples

Photographs of leaf and petiole samples

Notes on tissue sampling

 

Taking whole leaf samples

  1. Walk across a field in a “W” pattern, taking samples of the youngest fully expanded leaf.
  2. The youngest fully expanded leaf is generally the fourth leaf below the growing tip.
  3. A potato leaf is a compound leaf comprising a central petiole / midrib and leaflet blades.
  4. Remove the whole leaf from the stem.
  5. A whole leaf sample should fill a standard tissue sample bag.
  6. Use this link for information on using whole leaf samples.

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Taking petiole samples

  1. Walk across a field in a “W” pattern, taking samples of the youngest fully expanded leaf.
  2. The youngest fully expanded leaf is generally the fourth leaf below the growing tip.
  3. A potato leaf is a compound leaf comprising a central petiole / midrib and leaflet blades.
  4. Remove the whole leaf from the stem.
  5. Strip off and discard the leaflet blades.
  6. A sample should comprise sufficient petioles to fill a standard 1/2 pint mug.
  7. More leaves will have to be picked to make up a petiole sample than a whole leaf sample, particularly early in development when leaves are small.
  8. Use this link for information on use of petiole samples. 

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Photographs of leaf and petiole samples

Potato tissue samples

 

Whole leaf sample

Whole leaf sample

 

Petiole sample

Petiole sample

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Further information:

Notes on tissue sampling

Tissue sampling for potatoes 2020 (Why, when and how to sample; interpreting results)

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