The Effects of Drought Stress on Respiration of Isolated Corn Mitochondria | Zendy

David T. Bell | Zendy; D. E. Koeppe | Zendy; Raymond J. Miller | Zendy

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The Effects of Drought Stress on Respiration of Isolated Corn Mitochondria

Author(s) -

David T. Bell,

D. E. Koeppe,

Raymond J. Miller

Publication year - 1971

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.48.4.413

Subject(s) - respiration , mitochondrion , drought stress , biology , stress (linguistics) , chemistry , agronomy , botany , microbiology and biotechnology , philosophy , linguistics

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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