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This article in AJ

  1. Vol. 93 No. 6, p. 1341-1343
     
    Received: June 8, 2000


    * Corresponding author(s): k.yatapanage@mailbox.uq.edu.au
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doi:10.2134/agronj2001.1341

The Relationship between Leaf Water Potential and Stem Diameter in Sorghum

  1. Kamal G. Yatapanage * and
  2. Hwat Bing So
  1. School of Land and Food Sci., Univ. of Queensland, St. Lucia, QLD 4072, Australia

Abstract

Leaf water potential (ψl) represents a good indicator of the water status of plants, and continuous monitoring of it can be useful in research and field applications such as scheduling irrigation. Changes in stem diameter (Sd) were used for monitoring ψl of pot-grown sorghum [Sorghum bicolor (L.) Moench] plants in a glasshouse. This method requires occasional calibration of Sd values against ψl Predicted values of ψl based on a single calibration show a good correlation with measured ψl values over a period of 13 d before and after the calibration. The correlation can further be improved with shorter time intervals.

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Copyright © 2001. American Society of AgronomyPublished in Agron. J.93:1341–1343.