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This article in SSSAJ

  1. Vol. 46 No. 6, p. 1343-1345
    Received: Nov 16, 1981
    Accepted: Aug 18, 1982

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A Water Bath System to Observe Temperature Effects on Taproot and Lateral Root Development of Plants1

  1. J. A. Stone and
  2. H. M. Taylor2



This paper describes a water bath system designed to provide accurate root-zone temperature control and serial observation of taproot and lateral root development to a depth of 120 cm. The system consists of a 137.2- by 100.3- by 121.9-cm deep constant-temperature water bath, 12 2.5- by 30.5- by 121.9-cm immersed acrylic plastic plant-growth containers, movable lighting, and a derrick for removing the growth containers. The acrylic containers are lifted from the bath in tiers of three, and data recorded with photographs.

Temperature distribution within the bath has been measured at water temperatures ranging from 5 to 35°C and in the acrylic containers at water temperatures ranging from 17 to 29°C. Temperatures remained within ±0.3°C of the setting throughout the water bath for 25 d with no detectable spatial variability. Temperature gradients within the acrylic growth containers are presented.

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