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Proton gradients during salt adaptation of synechococcus
Author(s) -
Nitschmann Wolfgang H.,
Packer Lester
Publication year - 1996
Publication title -
iubmb life
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.132
H-Index - 113
eISSN - 1521-6551
pISSN - 1521-6543
DOI - 10.1080/15216549600201843
Subject(s) - thylakoid , membrane , salt (chemistry) , cytoplasm , biophysics , photosynthesis , chemistry , adaptation (eye) , photosystem ii , chloroplast , biology , biochemistry , botany , neuroscience , gene
The ability of cells to energize their membranes during salt‐adaptation as measured by ΔpH was studied using the electron spin resonance (ESR) spin probe technique. Salt‐adaptated cells have the following features: an increased stability of ΔpH across the cytoplasmic membrane and a significantely lower rate of ΔpH formation across the thylakoid membrane. Therefore, during salt‐adaptation, the cytoplasmic membrane takes over the role of primary energizing membrane from the thylakoid membrane. In contrast to non‐adapted cells, ΔpH across the thylakoid membrane of salt‐grown cells is higher under respiratory than under photosynthetic conditions.