Potassium requirement of pyruvate kinase extracted from leaves of halophytes |
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Authors: | Tö ru Matoh,Sumito Yasuoka,Takayuki Ishikawa,Eiichi Takahashi |
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Affiliation: | Plant Nutrition Lab., Faculty of Agriculture, Kyoto Univ., Kyoto 606, Japan. |
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Abstract: | 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 Km values for potassium. The values were all ca 10−3 M , as also reported for the glycophyte enzymes. However, the Km values were reduced by 60 to 70% by the addition of betaine to a concentration of 1 M . |
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Keywords: | Atriplex gmelini betaine Chenopodium acuminatum halophyte potassium requirement pyruvate kinase Spergularia salina |
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