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Table 3 Response ratios of identified lipids (HA-treated vs control)

From: Humic acids increase the maize seedlings exudation yield

Compounds

Root extract

Exudates

Lignoceric acid

1.81*

2.73*

Linoleic acid

− 1.22

8.12*

Isohexonic acid

− 1.88

6.84*

Pimelic acid

− 1.87*

5.62*

Adipic acid

− 2.23*

4.18*

d-Erythro-sphingosine

− 4.76*

3.02*

Pelargonic acid

− 1.15

2.34*

Lauric acid

− 1.47

2.11*

Caprylic acid

1.58

7.57*

2-Ketoisocaproic acid

− 1.82

5.27*

2-Methylglyceric acid

− 1.56

3.13*

Capric acid

− 1.26

2.95*

2-Ketobutyric acid

− 1.72

2.82*

Butyrolactam

− 1.69

2.47*

2-Ketoadipic acid

− 5.38*

2.22

Isopentadecanoic acid

− 3.65*

2.23

Octadecanol

− 2.49*

− 1.31

Palmitoleic acid

− 2.24*

1.70

Palmitic acid

− 1.28*

1.29

Arachidic acid

− 1.67*

− 1.76

Stearic acid

− 1.30*

1.38

Oleic acid

− 7.33*

− 2.97*

Myristic acid

1.02

1.22

Pentadecanoic acid

− 1.57

1.83

Isoheptadecanoic acid

− 1.35

1.38

Heptadecanoic acid

− 1.43

1.19

Dodecanol

1.07

1.11

Dehydroabietic acid

1.08

− 1.17

Cholesterol

− 1.48

1.20

Beta-sitosterol

− 1.08

1.45

2-Monopalmitin

− 1.25

2.10

1-Monostearin

− 1.16

− 1.68

1-Monopalmitin

− 1.47

− 2.30

1-Monoolein

1.21

3.47

Stigmasterol

1.20

1.65

  1. When the response ratio (level in a given treatment divided by the level in the control) was lower than 1 the inverse was taken, and the sign changed. Values in italic type and indicated by * represent a Dunnett’s test significance of p < 0.05 against the control