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Plant Physiology 60:370-373 (1977)
© 1977 American Society of Plant Biologists

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Articles

Changes in the Photosynthetic Apparatus of Maize in Response to Simulated Natural Temperature Fluctuations 1

James A. Teeri, David T. Patterson2, Randall S. Alberte3 and Ron M. Castleberry4

a Barnes Laboratory, The University of Chicago, 5630 South Ingleside Avenue, Chicago, Illinois 60637

The response of the photosynthetic apparatus to low temperature periods differed among three hybrids of maize (Zea mays L.) grown in a phytotron. Light-saturated photosynthetic rates, leaf chlorophyll content, and mesophyll cell photosynthetic unit density all declined with increasing duration of low temperature. No single metabolic or physiological parameter appeared to control the response of the three hybrids to low temperature stress. Among all temperature treatments, net photosynthetic rate on a leaf area basis was more closely correlated with leaf chlorophyll content than with any other measured parameter. Final shoot dry weight was most highly correlated with stomatal conductance to CO2.

2 Department of Botany, Duke University, Durham, North Carolina 27706. Present address: USDA-ARS, Southern Weed Science Laboratory, Stoneville, Mississippi 38776.

3 Department of Biology, University of California, Los Angeles, California 90024. Present address: Department of Biology, Barnes Laboratory, The University of Chicago, Chicago, Illinois 60637.

4 DeKalb AgResearch, Inc., DeKalb, Illinois 60115.

1 This research was supported by The Louis Block Fund of The University of Chicago, The DeKalb Foundation, DeKalb AgResearch, Inc., and National Science Foundation Grant DEB 76-04150 to the Southeastern Plant Environment Laboratories. D. T. P. was supported by RANN AEN 73-07893-A01 to P. J. Kramer. R. S. A. was supported by a National Science Foundation Energy Related Fellowship.






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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1977 by the American Society of Plant Biologists