Table 4.

Effect of Pi Supply on the Accumulation of Pi and Total P in Plant Tissues

PlantTissuePi in Medium
 (mM)Fresh Weight
 (mg/plant)Pi Content
 (nmol/mg fresh weight)Total P Content
 (nmol/mg fresh weight)
Wild typeRoot0.222.3 ± 1.212.5 ± 1.024.8 ± 0.3
pht2;1-1Root0.217.0 ± 2.09.9 ± 0.822.7 ± 0.8
Wild typeRoot4.019.2 ± 1.414.9 ± 0.826.8 ± 1.0
pht2;1-1Root4.022.0 ± 0.817.7 ± 0.729.6 ± 1.4
Wild typeLeaves0.280.4 ± 8.215.7 ± 0.527.7 ± 2.3
pht2;1-1Leaves0.266.1 ± 4.321.5 ± 1.233.9 ± 1.5
Wild typeLeaves4.0216.4 ± 17.216.7 ± 0.624.9 ± 1.0
pht2;1-1Leaves4.0173.4 ± 7.512.2 ± 0.817.9 ± 1.2
  • Pi and total phosphorus content of roots and rosette leaves were determined for 8 to 10 plants grown for 4 weeks on agar-solidified medium. Values represent means ± se.