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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)