Letter | Published:

Recording Leaf Movements with a Strain Gauge

Naturevolume 207pages880881 (1965) | Download Citation

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Abstract

IN our pilot studies concerning the effect of space environments on the circadian leaf movements, we have devised a small lightweight leaf movement recording system using a strain gauge coupled to an amplifier and a recorder. The need for such a system was dictated by the physical limitations of an orbiting capsule. We have also found that such a system is useful for earthbound experiments. The small size of the sensing unit makes it possible to place several units on a single plant. The monitored plant can easily be placed in a small control chamber and continuous records of several weeks' duration can be obtained when the movements are recorded on a strip chart recorder.

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Affiliations

  1. Space Biology Laboratory, Center for Health Sciences, University of California, Los Angeles

    • T. HOSHIZAKI
  2. NASA Ames Research Center, Moffet Field, California

    • K. YOKAYAMA

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https://doi.org/10.1038/207880a0

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