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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