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Published in Crop Sci 12:251-252 (1972)
© 1972 Crop Science Society of America
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Growth Response of Corn to Changes in Root Temperature and Soil Water Suction Measured with an LVDT1

E. W. R. Barlow and L. Boersma2

The rate of corn (Zea mays L.) leaf elongation was continuously monitored with a Linear Variable Differential Transducer (LVDT) which accurately measures the rapid changes in leaf elongation rate that occur after a plant is released from stress. Short-term measurements of leaf elongation rate at varying root temperatures gave qualitatively similar results to those obtained by other workers in long-term experiments. The leaf elongation rate increased rapidly when plant roots were released from low temperature or water stress. The maximum leaf elongation rate achieved after the the release from stress was higher than the maximum rate of unstressed plants.

Key Words: Zea mays L • Water stress

1 Technical Paper No. 3149, Oregon Agricultural Experiment Station, Corvallis, Oregon 97331. Contribution from the Department of Soils. Research supported by matching fund project B-002-ORE of the Office of Water Resources Research, U.S.D.I.

2 Research Assistant and Professor, respectively. Oregon State University.

Received for publication August 16, 1971.




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