Nitrogen acquisition , PEP carboxylase , and cellular pH homeostasis : new views on old paradigms


The classic biochemical pH-stat model of cytosolic pH regulation in plant cells presupposes a pH-dependent biosynthesis and degradation of organic acids, specifically malic acid, in the cytosol. This model has been used to explain the higher tissue accumulation of organic acids in nitrate (NO 3 – )-grown, relative to ammonium (NH 4 + )-grown, plants, the… (More)

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