Production of 3-hydroxypropionaldehyde in silage inoculated with Lactobacillus coryniformis plus glycerol.

We examined the production of an antimicrobial component, 3-hydroxypropionaldehyde (3-HPA), in laboratory-scale silage inoculated with Lactobacillus coryniformis strain 394, which ferments glycerol to 3-HPA. A modified colorimetric method that used an NaOH-treated blank and determined the absorption spectrum of the samples was employed to detect a 3-HPA-like component (HLC) that was assumed to be 3-HPA. Inoculation with Lb. coryniformis 394 plus glycerol in ensiling produced HLC at 10-460 ppm and contributed to inhibition of butyric fermentation and retardation of aerobic spoilage. HLC was considered to be 3-HPA from its absorption spectrum. These results suggest that the production of 3-HPA by Lb. coryniformis 394 is useful in ensiling and that the modified colorimetric method is effective to detect 3-HPA in silage.