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Table 1 In planta P and P uptake characteristics of P deficient poplar

From: Phosphate uptake kinetics and tissue-specific transporter expression profiles in poplar (Populus × canescens) at different phosphorus availabilities

   Total P concentration [mg g−1] Total P content [mg fraction−1] 33P recovery [% fraction−1] P uptake [nmol fraction −1]
HP Leaf 6.80 ± 0.51de 8.55 ± 0.33e 6.79 ± 0.29j 43.4 ± 1.82g
  Stem 4.92 ± 0.55d 2.56 ± 0.20d 1.35 ± 0.15e 8.64 ± 0.96f
  Fine Root 11.27 ± 1.40e 4.79 ± 1.49de 5.79 ± 0.97i 37.01 ± 6.20g
  Coarse Root 6.98 ± 1.41de 1.92 ± 0.32d 1.04 ± 0.10d 6.65 ± 0.65f
MP Leaf 1.25 ± 0.10c 0.19 ± 0.03bc 4.51 ± 0.38h 0.29 ± 0.02d
  Stem 1.11 ± 0.11bc 0.11 ± 0.02abc 7.22 ± 0.79k 0.46 ± 0.05de
  Fine Root 0.67 ± 0.12abc 0.08 ± 0.02ab 10.07 ± 0.69l 0.64 ± 0.04e
  Coarse Root 1.03 ± 0.15bc 0.23 ± 0.03c 3.73 ± 0.79g 0.24 ± 0.05d
LP Leaf 0.69 ± 0.03abc 0.15 ± 0.03bc 0.08 ± 0.02a 0.059 × 10−3 ± 0.001 × 10-3 a
  Stem 0.62 ± 0.17ab 0.05 ± 0.02a 0.12 ± 0.03b 0.088 × 10−3 ± 0.003 × 10-3 a
  Fine Root 0.41 ± 0.10a 0.05 ± 0.01a 1.94 ± 0.47f 1.48 × 10−3 ± 0.35 × 10-3 c
  Coarse Root 0.49 ± 0.03ab 0.10 ± 0.01abc 0.41 ± 0.19c 0.32 × 10−3 ± 0.15 × 10-3 b
p-value p (treatment) <0.001 <0.001 <0.001 <0.001
p-value p (fraction) 0.225 <0.001 <0.001 <0.001
p-value p (treatment×fraction) <0.01 <0.001 <0.001 <0.001
HP whole plant 7.10 ± 0.58C 17.82 ± 1.38C 14.98 ± 1.36B 95.69 ± 8.71C
MP whole plant 1.03 ± 0.11B 0.61 ± 0.05B 25.52 ± 1.84C 1.63 ± 0.12B
LP whole plant 0.56 ± 0.04A 0.34 ± 0.06A 2.55 ± 0.64A 1.94 × 10−3 ± 0.49 × 10-3 A
p-value   <0.001 <0.001 <0.001 <0.001
  1. Total P concentration and total P content per dry mass, 33P recovery and calculated uptake of P after 2 days in tissues of and whole poplar plants grown with one of three different P concentrations in the nutrient solution in sand (HP: 641 μM, MP: 6.4 μM, LP: 0.064 μM). Different letters indicate significant differences (p ≤ 0.05, Two-Way-ANOVA and Tukey’s honest significance test, mean ± SE, n = 4-5)