TABLE 1.

GC-MS headspace SPME identification of relevant VOCs produced by the non-pathogenic F. oxysporum FO12 alone and during co-incubation with V. longisporum ELV25 or V. dahliae ELV22.

Predicted compounda	KIb	Matchc	Predicted funtiond
VOCs constantly produced by FO12
3-methyl-1-butanol	736	966	Antifungal (De Souza et al., 2018)
2-methyl-1-butanol	739	934	Antifungal (Raza et al., 2015)
β-acorenol	1649	922	Antibacterial (Albay et al., 2009)
Ethyl acetate	612	873	Antifungal (Toffano et al., 2017)
1-hexanol	868	928	PGP (Splivallo et al., 2007)
Cedr-8-ene	1411	936	N.a.
3-methylbutyl acetate	876	907	PGP (Amavizca et al., 2017)
Isobutyl acetate	771	838	N.a.
1-ethyl-4-methoxybenzene	1110	887	N.a.
Tridecane	1300	790	PGP (Amavizca et al., 2017)
1,1,2b,6-tetramethyl-2,2a,2b,3,4,6a,7,7a-octahydro-1H-cyclobuta[a]indene	1330	843	N.a.
Hexane, 2,3-dimethyl	760	806	N.a.
VOCs produced by FO12 after exposure to V. longisporum or V. dahliae
(1R,4R,5S)-1-isopropenyl-4,8-dimethylspiro[4.5]dec-7-ene	1475	917	N.a.
2-methyl-1-propanol	625	845	Antifungal (Stotzky et al., 1976)
Pyrocatechol	2020	937	N.a.
Cembrene	1939	933	N.a.
Aristol-1-ene	1453	862	N.a.
(4R,5R)-1-isopropylidene-4,8-dimethylspiro[4.5]dec-7-ene	1515	906	N.a.
Alloaromadendrene	1461	909	N.a.
VOCs produced by FO12 only after exposure to V. longisporum
β-cedrene	1421	921	N.a.
VOCs produced by FO12 only after exposure to V. dahliae
2-methylbutyl acetate	880	887	Nematicidal (Terra et al., 2018)

^aCompound names according to International Union of Pure and Applied Chemistry (IUPAC). ^bKovats index (KI) of the compounds was calculated with an alkane series. ^cMatch index: Only substances with match index with the NIST MS Search 2.2 included in the Software-Package of the NIST 2014 database over 750 were considered. ^dPredicted function of the compounds according to referenced literature. N.a., not available (unknown function). PGP, plant growth promotion.