. 2018 Sep 5;6:e5445. doi: 10.7717/peerj.5445

Table 6. Aromatics compounds identified on sugarcane methanolic leaves extracts.

The treatments were inoculation with G. diazotrophicus and H. seropedicae (PGPB), bacteria and humic acid (PGPB+HA) or only humic acid (HA) isolated from vermicompost. The data were expressed in respect to the control treatment (%).

Metabolite	HA	PGPB	PGPB+HA
vanillic acid	18^ns	24^ns	60^*
syringic acid	46^ns	−11^ns	83^*
shikimic acid	311^**	22^**	385^**
pyrogallol	−9^ns	39^ns	64^ns
pyrazine 2,5-dihydroxy	60^ns	85^ns	189^ns
pipecolic acid	−77^**	197^**	450^**
p-hydroquinone	29^ns	77^ns	122^ns
phthalic acid	−29^*	72^**	117^**
phenylethylamine	−63^ns	−13^ns	4^ns
phenylacetic acid	2^ns	−9^ns	29^ns
parabanic acid	13^ns	62^ns	137^**
oxamic acid	69^ns	50^ns	92^ns
gentisic acid	45^ns	−1^ns	35^ns
ferulic acid	−28^ns	59^ns	175^ns
dihydroabietic acid	−29^ns	17^ns	78^ns
coniferin	−77^*	−33^ns	201^**
cis-caffeic acid	294^**	138^*	494^**
chlorogenic acid	−20^ns	133^*	−30^ns
arbutin	204^**	21^ns	127^**
4-hydroxyphenylacetic acid	6^ns	12^ns	12^ns
4-hydroxymandelic acid	−45^ns	17^ns	−24^ns
4-hydroxycinnamic acid	100^**	−6^ns	−19^**
4-hydroxybenzoate	19^ns	1^ns	98^**
4-hydroxybenzaldehyde	63^ns	−48^ns	87^**
3-hydroxybenzoic acid	−5^ns	27^ns	−20^ns
3,4-dihydroxybenzoic acid	46^**	58^**	29^**
2-phenylpropanol	47^ns	10^ns	15^ns
2-(4-hydroxyphenyl)ethanol	−11^ns	−12^ns	108^**
2,3-dihydroxypyridine	1^ns	−9^ns	−3^ns
2,3-dihydroxybenzoic acid	12^**	52^**	80^**
1,2,4-benzenetriol	14^ns	−9^ns	39^ns

Notes.

ns: no significant

p < 0.05.

^**

p < 0.01.