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Potassium requirement of pyruvate kinase extracted from leaves of halophytes
Author(s) -
Matoh Töru,
Yasuoka Sumito,
Ishikawa Takayuki,
Takahashi Eiichi
Publication year - 1988
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.1399-3054.1988.tb02035.x
Subject(s) - halophyte , potassium , pyruvate kinase , phosphoenolpyruvate carboxylase , enzyme , chenopodiaceae , botany , chemistry , biology , biochemistry , salinity , ecology , organic chemistry , glycolysis
Pyruvate kinase enzymes were partially purified from leaves of halophytes, Atriplex gmelini C. A. Mey., Chenopodium acuminatum Wild, and Spergularia salina J. et C. Presl., grown hydroponically in the presence of 250 m M NaCl in a greenhouse, to determine their K m values for potassium. The values were all ca 10 −3 M , as also reported for the glycophyte enzymes. However, the K m values were reduced by 60 to 70% by the addition of betaine to a concentration of 1 M .