Table 1.

Secondary metabolites and their concentration produced by Trichoderma strains were analyzed by gas chromatography-mass spectrometry (GC-MS)

Trichoderma strains	Content of antibiosis secondary metabolites (%)
	Polyketides	Terpenes	CAD	NHC	Alkanes	Ethanols	Aldehydes
SH2303	3.42 ± 0.2d	11.82 ± 1.5d	15.04 ± 1.2a	1.99 ± 0.5a	34.96 ± 2.3d	2.59 ± 1.2c	0.00 ± 0.0a
ZJSX5003	3.84 ± 0.8d	22.18 ± 3.2d	18.42 ± 5.6a	2.97 ± 0.8b	21.18 ± 1.5c	0.05 ± 0.0a	0.18 ± 0.1a
GDFS1009	1.15 ± 0.5b	0.00 ± 0.0a	45.09 ± 8.9c	14.40 ± 1.4	15.30 ± 3.2b	0.21 ± 0.1a	0.23 ± 0.1a
ZJSX5002	2.20 ± 0.9c	2.22 ± 0.8a	18.55 ± 4.5a	2.41 ± 0.5b	16.38 ± 1.5b	2.42 ± 0.5c	14.49 ± 2.5c
HNLY1002	0.40 ± 0.1a	1.43 ± 0.6a	37.18 ± 6.5c	6.41 ± 2.5c	22.46 ± 2.3c	0.22 ± 0.1a	1.81 ± 0.5b
HNCS4002	6.01 ± 1.5e	4.05 ± 1.2b	13.09 ± 2.5a	7.93 ± 1.5d	21.05 ± 6.2c	3.44 ± 1.2d	1.86 ± 0.6b
GDZQ1008	3.75 ± 0.9d	9.87 ± 2.5c	28.79 ± 8.5b	5.36 ± 1.2c	25.86 ± 1.4c	1.30 ± 0.9b	0.69 ± 0.2a
GDFS5001	5.28 ± 0.5e	1.94 ± 0.8a	60.14 ± 7.2d	3.98 ± 1.2bc	5.98 ± 3.2a	0.16 ± 0.1a	1.59 ± 0.8b

The results showed mean value ± standard error (n = 3), one way ANOVA followed by multiple comparison of Duncan test

CAD carboxylic acids and derivatives, NHC nitrogen heterocyclic compounds; The different alphabets in the superscript differ significantly (p < 0.05) between the Trichoderma strains