P uptake by plant There are two types of transporters with different affinities for pi, one with a high affinity with a Km of 3-5 mmo/m and the other a low affinity system with a Km of 50 to 330 mmol/m3 Molecular studies have confirmed the presence of multiple genes encoding phosphate transporters that are differentially expressedThere are two types of transporters with different affinities for Pi, one with a high affinity with a Km of 3-5 mmol/m3 and the other a low affinity system with a Km of 50 to 330 mmol/m3 Molecular studies have confirmed the presence of multiple genes encoding phosphate transporters that are differentially expressed. P uptake by plant