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Table 3 Phosphorous-(32P) accumulated in maize plants and percentage distribution between leaves and roots

From: Transcriptional and physiological analyses of Fe deficiency response in maize reveal the presence of Strategy I components and Fe/P interactions

 

32P in plants (μmol g−1 DW roots)

32P in roots (%)

32P in leaves (%)

 

+Fe

-Fe

+Fe

-Fe

+Fe

-Fe

KH 2 32 PO 4

Ferrihydrite

90.93 ± 5.46 a

37.74 ± 5.66 B*

49.2

69.5

50.8

30.5

Fe-Citrate

104.00 ± 16.36 a

63.51 ± 3.43 A*

37.6

62.6

62.4

37.4

Fe-PS

97.36 ± 8.66 a

56.17 ± 2.09 A*

44.7

68.1

55.3

31.9

( 32 P)Vivianite

Ferrihydrite

0.11 ± 0.03 b

0.13 ± 0.01 C

76.0

88.7

24.0

11.3

Fe-Citrate

0.11 ± 0.01 b

0.13 ± 0.01 C

76.9

88.3

23.1

11.7

Fe-PS

0.11 ± 0.01 b

0.19 ± 0.02 C*

76.3

91.4

23.7

8.6

  1. The plant ability to accumulate P was evaluated by 32P uptake experiments on Fe-sufficient (+Fe) and Fe-deficient (−Fe) plants. Up to 24 h, −Fe and + Fe plants were treated with three unlabelled Fe-sources (Ferrihydrite, Fe-Citrate or Fe-PS) provided in conjunction with two different labelled 32P-sources: KH2 32PO4 or (32P)Vivianite. Data are means ± SD of three independent experiments. Small letters, refer to statistically significant differences among Fe-sufficient plants; capital letters, refer to statistically significant differences among Fe-deficient plants, asterisks, refer to statistically significant differences between the two growth condition (−Fe vs + Fe). ANOVA Holm–Sidak, P < 0.05, n = 3). DW, dry weight
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BMC Genomics

ISSN: 1471-2164

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