Table 6 Fructose (mg mL⁻¹) content^a in Pinus laricio callus grown in 28 d of subculture in presence of hormones (2,4-D + BAP) or humic or fulvic acids^b at A = 0.5 mg.L⁻¹; B = 1.0 mg.L⁻¹; C = 2.0 mg.L⁻¹

Control

10.90 (0.07)^a

10.90 (0.06)^a

10.90 (0.08)^a

2,4-D + BAP

2.95 (0.01)^h

2.95 (0.04)ⁱ

2.95 (0.01)^l

HA-C

5.65 (0.01)^ef

5.70 (0.02)f

5.50 (0.02)^g

HA-D

5.90 (0.02)^e

5.99 (0.02)^ef

5.85 (0.07)^ef

HA-E

3.10 (0.01)^h

3.28 (0.01)^h

2.34 (0.02)^l

HA-F

4.48 (0.02)^g

4.84 (0.03)^g

5.99 (0.02)^ef

HA-G

4.68 (0.03)^g

4.71 (0.03)^g

3.28 (0.01)^h

HA-H

8.75 (0.04)^c

8.91 (0.07)^c

4.84 (0.03)^g

HA-I

7.65 (0.05)^d

7.75 (0.02)^d

4.71 (0.03)^g

HA-L

8.65 (0.06)^c

8.81 (0.05)^c

8.91 (0.07)^c

HA-M

5.80 (0.05)^ef

6.10 (0.01)^e

7.75 (0.02)^d

HA-N

5.55 (0.05)^f

5.95 (0.02)^ef

8.81 (0.05)^c

FA-O

5.80 (0.05)^ef

6.10 (0.01)^e

6.50 (0.03)^e

FA-P

5.55 (0.05)^f

5.95 (0.02)^ef

6.63 (0.02)^e

FA-Q

9.65 (0.08)^b

9.75 (0.08)^b

9.77 (0.07)^b