The effects of drought stress on respiration of isolated corn mitochondria |
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| Authors: | Bell D T Koeppe D E Miller R J |
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| Affiliation: | Department of Agronomy, University of Illinois, Urbana, Illinois 61801. |
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| Abstract: | 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. |
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