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Plant Physiology 48:413-415 (1971)
© 1971 American Society of Plant Biologists

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The Effects of Drought Stress on Respiration of Isolated Corn Mitochondria 1

David T. Bell, D. E. Koeppe and Raymond J. Miller

a Department of Agronomy, University of Illinois, Urbana, Illinois 61801

Mitochondria were isolated from etiolated corn shoots (Zea mays L.) that were stressed to a measured water potential. The rates of mitochondrial respiration in state III, state IV, and without phosphate or ADP on a milligram protein basis decreased as water stress increased with succinate, malatepyruvate, or reduced nicotinamide adenine dinucleotide as substrates. Coupling (as determined by respiratory control and ADP/O ratios) did not decrease with increasing water stress. At water potentials greater than –35 bars all respiration had ceased.

1 Supported in part by a grant from the Water Resources Center, University of Illinois and by funds from the Illinois Agriculture Experiment Station.




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O. K. Atkin and D. Macherel
The crucial role of plant mitochondria in orchestrating drought tolerance
Ann. Bot., February 1, 2009; 103(4): 581 - 597.
[Abstract] [Full Text] [PDF]


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Copyright © 1971 by the American Society of Plant Biologists