ABSTRACT
Trichoderma spp. is a kind of filamentous fungi with important biocontrol value. Twelve strains of Trichoderma spp. were isolated from the soils of different types of crops in Shaoxing, Zhejiang and Foshan, Guangdong. The antagonistic resistance to Fusarium oxysporum was compared by plate confrontation test. The further analysis of volatile secondary metabolites for two strains were carried out using HS-SPME-GC-MS analysis. The results showed that T. asperellum ZJSX5003 and GDFS1009 had fast growth ability, and the inhibition effects on F. oxysporum were 73% and 74% respectively. Six identical volatile metabolites were detected as follows 2-Methyl-1-propanol, 3-Methyl-1-butanol, 3-Methyl-3-buten-1-ol, Acetyl methyl carbinol, Butane-2,3-diol and 6-n-pentyl-2H-pyran-2-one (6-PAP). Among them, 6-PAP was validated to have a higher inhibitory effect on F. oxysporum in vitro. This study will provide basis for the development of biocontrol agents with metabolites of Trichoderma, such as 6-PAP.
Subject(s)
Antibiosis , Antifungal Agents , Pharmacology , Fusarium , Physiology , Gas Chromatography-Mass Spectrometry , Trichoderma , Chemistry , MetabolismABSTRACT
Objective To explore the difference of serum free fatty acid(FFA) composition between the patients with the metabolic syndrome(MS) and the patients with high risk for MS(HRMS),and the relationship of FFA composition with their serum glucose.Methods The serum fatty acid profile was measured with the gas chromatography and mass spectrometer(GC/MS)in 159 patients with MS or HRMS and 43 control subjects.Results The contents of unsaturated fatty acid(UFA,C18:2 and C20:3),the ratios of UFA/TFA(total fatty acid),PUFA(polyunsaturated fatty acid)/TFA and PUFA/SFA(saturated fatty acid) were significantly increased in patients with MS than those in the normal controls(P0.05).FBG had remarkably positive correlation with UFA/TFA,PUFA/TFA and PUFA/SFA(r=0.229,0.204,0.230,P