Effects of Gramicidin on Corn Mitochondria | Zendy

Raymond J. Miller | Zendy; W. S. Dumford | Zendy; D. E. Koeppe | Zendy

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Effects of Gramicidin on Corn Mitochondria

Author(s) -

Raymond J. Miller,

W. S. Dumford,

D. E. Koeppe

Publication year - 1970

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.46.3.471

Subject(s) - gramicidin , respiration , mitochondrion , swelling , substrate (aquarium) , chemistry , biochemistry , biophysics , biology , membrane , botany , materials science , ecology , composite material

The effects of gramicidin D, S, and J on corn mitochondria respiration and swelling were studied. Only gramicidin D was found to have any pronounced effect on mitochondrial swelling. In buffered KCl gramicidin D produced a rapid, respiration-independent swelling which was not reversed with respiratory inhibitors or substrate exhaustion. The respiration rate of exogenous reduced nicotinamide adenine dinucleotide was stimulated by all three gramicidins, but the effects on malate-pyruvate and succinate respiration depended on the type of gramicidin and the reaction media. The respiration effects of gramicidin D may be due to action at specific sites for each substrate.

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