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Comparison of hydraulic press and pressure chamber estimates of potato leaf water potential1

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Abstract

The leaf water potential of field-grown Russet Burbank potato plants (Solarium tuberosum L.) was estimated with a pressure chamber and a leaf press to assess the usefulness of the leaf press for evaluation of potato leaf water status.

Paired leaflets were used for leaf water potential estimation with both instruments. Leaflets were taken from potato plants exposed to excessive soil moisture and high relative humidity, from plants with adequate soil moisture, and from plants under severe water stress.

Over the range from -0.28 to -1.61 MPa, for 124 leaflet pairs, the leaf press estimates of leaf water potential were exponentially related (r2 = 0.85) to pressure chamber estimates. The leaf press compared well with the pressure chamber in the range from -0.6 to -1.2 MPa.

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Authors and Affiliations

  1. Crop Science Department, Oregon State University, Malheur Experiment Station, 595 Onion Ave., 97914, Ontario, OR

    Clinton C. Shock

Authors
  1. Eric P. Eldredge
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  2. Clinton C. Shock
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Additional information

Approved for publication by Oregon State University Agricultural Communications as technical paper No. 9040. Research supported in part by the Oregon Potato Commission.

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Eldredge, E.P., Shock, C.C. Comparison of hydraulic press and pressure chamber estimates of potato leaf water potential1. American Potato Journal 67, 307–312 (1990). https://doi.org/10.1007/BF02987272

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  • DOI: https://doi.org/10.1007/BF02987272

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