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Salt‐stimulated Phosphoenolpyruvate Carboxylase in Cakile maritima
Author(s) -
BEER S.,
SHOMERILAN ADIVA,
WAISEL Y.
Publication year - 1975
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1975.tb03840.x
Subject(s) - phosphoenolpyruvate carboxylase , halophyte , phosphoenolpyruvate carboxykinase , pyruvate carboxylase , sodium , salt (chemistry) , chemistry , botany , crassulacean acid metabolism , biology , salinity , biochemistry , enzyme , photosynthesis , ecology , organic chemistry
The effects of NaCl and other salts, in vivo and in vitro , on the activity of phosphoenolpyruvate carboxylase from the coastal C 3 halophyte Cakile maritima Scop, were investigated. Plants grown with 100 m M NaCl in their growth medium yielded some 30% higher rates of phosphoenolpyruvate carboxylase activity than did salt‐depleted plants. Activity of the enzyme was stimulated when NaCl was added to the reaction mixture in concentrations of up to 200 m M . The magnitude of this in vitro stimulation was similar for plants grown in the presence or absence of NaCl. The effect seems to be caused by chloride rather than by sodium ions.