About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in AJ

  1. Vol. 65 No. 3, p. 400-404
     
    Received: June 10, 1972


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/agronj1973.00021962006500030015x

Water Stress Relations of the Potato Plant under Field Conditions1

  1. Eliot Epstein and
  2. W. J. Grant2

Abstract

Abstract

Potatoes (Solanum tuberosum L.) grown in northern Maine are often subjected to extensive periods of drought. The objective of this study was to examine the physiological response of potatoes to soil water stress.

Relative water content, leaf diffusive resistance, and tuber water potential of two potato varieties were measured under irrigated and nonirrigated conditions. There were pronounced differences in relative water content, leaf diffusive resistance, and tuber water potential as a result of irrigation. Relative water content (RWC) plant leaves correlated well with soil water potential but poorly with leaf diffusive resistance. The two potato varieties differed in RWC when soil water potential was high.

Tuber water potential correlated well with RWC and soil water potential. Similarity between tuber water potential and the RWC data suggested that the potato plant exhibits water stress when the soil water potential drops below −0.25 bar.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .