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Updated: Oct 21, 2025

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Published on: October 22, 2016
Construction and Performance of a Temperature-Gradient Bar and Chamber
Abstract:
An inexpensive temperature-gradient bar and chamber for use in studies of seed germination and root growth is described. Aluminum troughs and a bar, surrounded by insulation and heated and cooled at their ends by water baths, form the floor of a chamber. A plexiglass top permits illumination by overhead light banks. The temperature gradient may be adjusted to any range within the limits of 10° and 50°C. The linearity and stability of the bar gradient, and the presence of temperature and humidity gradients in the chamber air above the bar, are discussed.
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