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Table 4 Sucrose (mg mL−1) contenta in Pinus laricio callus grown in 28 d of subculture in presence of hormones (2,4-D + BAP) or humic or fulvic acidsb at A = 0.5 mg.L−1; B = 1.0 mg.L−1; C = 2.0 mg.L−1

From: Molecular characteristics of humic substances from different origins and their effects on growth and metabolism of Pinus laricio callus

Treatments

A

B

C

Control

0.33 (0.02)l

0.33 (0.03)l

0.33 (0.02)m

2,4-D + BAP

0.33 (0.02)l

0.33 (0.02)l

0.33 (0.02)m

HA-C

4.18 (0.05)b

4.38 (0.01)c

4.08 (0.02)c

HA-D

4.30 (0.07)b

4.30 (0.02)c

4.28 (0.02)c

HA-E

1.03 (0.02)i

1.13 (0.03)i

1.00 (0.05)l

HA-F

7.22 (0.02)a

7.22 (0.03)a

7.29 (0.02)a

HA-G

3.40 (0.05)d

3.30 (0.02)e

3.00 (0.03)e

HA-H

3.95 (0.04)c

4.15 (0.04)c

4.11 (0.05)c

HA-I

3.95 (0.03)c

3.75 (0.02)d

3.72 (0.02)d

HA-L

1.44 (0.02)g

1.51 (0.05)h

1.51 (0.02)h

HA-M

2.10 (0.06) e

2.20 (0.05)f

2.20 (0.04)f

HA-N

1.95 (0.01)f

1.85 (0.02)g

1.80 (0.02)g

FA-O

4.25 (0.03)b

4.65 (0.02)b

4.85 (0.02)b

FA-P

4.10 (0.02)bc

4.18 (0.07)c

4.28 (0.01)c

FA-Q

1.25 (0.01)h

1.15 (0.01)i

1.18 (0.02)i

  1. a Each value represents the mean ± SE of 5 replicates. In the same column, different letters indicate significant differences at P ≤ 0.05
  2. b HA-C from Leonardite; HA-D from oak forest soil; HA-E from compost after 150 d maturation; HA-F from treated Lignite; HA-G from compost after 30 d maturation; HA-H from an oxidized coal; HA-I from fir and beech forest soil; HA-L from peat; HA-M from vermicompost; HA-N from a Lignite; FA-O from a loamy agricultural soil; FA-P a sandy loam agricultural soil; FA-Q from a volcanic forest soil