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Plant Physiology 41:1520-1524 (1966)
© 1966 American Society of Plant Biologists

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Simulated Low-gravity Environments and Respiratory Metabolism in Avena Seedlings 1

R. R. Dedolph, B. R. Wilson2, W. Chorney and J. J. Breen3

Division of Biological and Medical Research, Argonne National Laboratory, Argonne, Illinois

Using horizontal and vertical axis clinostats and sand-grown oat seedlings (Avena sativa), it was found that horizontal clinostat rotation at 2 rpm increased respiration and inorganic and organic phosphorus content of seedlings. Increased coleoptile geotropism and root growth are attributed to rotational nullification of the directional component of the gravitational stimulus. These growth modifications are mechanistically explicable by the relationship between plant metabolism and auxin concentration in these organs.

2 Central States Universities Incorporated Honors Program student.

3 Present address: United States Marine Corps, Parris Island, South Carolina.

1 Work performed under the auspices of the United States Atomic Energy Commission and the National Aeronautics and Space Administration.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1966 by the American Society of Plant Biologists