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Tissue specificity of the regulation of ATP hydrolysis by isolated plant mitochondria
Author(s) -
Valeric Marie,
Haraux Francis,
Gardeström Per,
Diolez Philippe
Publication year - 1993
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(93)80003-d
Subject(s) - mitochondrion , biochemistry , chemistry , atp hydrolysis , hydrolysis , microbiology and biotechnology , biology , enzyme , atpase
Pea leaf mitochondria had a high ATP hydrolase activity following the collapse of the membrane potential by addition of valinomycin in state 4. In mitochondria isolated from potato tubers such ATP hydrolase activity was not observed. Pea leaf mitochondria also had a ΔpH, in contrast to what was previously found for potato tuber mitochondria. This ΔpH could, however, not explain the different results on ATP hydrolysis since this activity was also observed in the presence of nigericin. The results suggest a tissue‐specific regulation of ATP hydrolysis in resting organs (potato tubers) as compared to active organs (leaves).