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ARS Home » Midwest Area » St. Paul, Minnesota » Plant Science Research » Research » Publications at this Location » Publication #111889
Title: CELL WALL COMPOSITION AND IN VITRO FERMENTABILITY OF FIVE SOYA BEAN VARIETIES

Author
item VANLAAR, HARMEN - WAGENINGEN UNIVERSITY
item TAMMINGA, SEERP - WAGENINGEN UNIVERSITY
item Jung, Hans Joachim
item WILLIAMS, BARBARA - WAGENINGEN UNIVERSITY

Submitted to: European Association of Animal Production Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 8/18/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The impact of differences among soybean varieties in cell wall concentration and composition on fermentability of soybean cell walls by colonic bacteria of swine was investigated. Seeds from five public soybean varieties (Donnato, Faribault, Lambert, Minato, and Toypro) were dehulled and cell wall preparations were prepared from the seed endosperm using a detergent extraction procedure. Cell walls were fermented in vitro with swine fecal material as the bacterial inoculum source. Gas production from cell wall fermentation was determined over a 144 h period. While these soybean varieties did vary in cell wall sugar composition, the largest difference among the varieties was for cell wall concentration (7.8 to 11.5 %). Total gas production from cell walls was similar among varieties (409 to 431 ml/g sugar), but rate of gas production was markedly different (8.2 to 12.1 %/h). An unexpected detergent-derived contaminant was detected in the cell wall preparations; however, its exact identity and concentration could not be determined. Donnato, the soybean variety with the highest rate of cell wall fermentation, appeared to have the lowest concentration of this contaminant, whereas the variety with the lowest rate of gas production (Minato) apparently had the highest level of the contaminant. But relative contamination with this detergent product was not significantly correlated with rate of gas production across all five varieties. It was not possible to determine if the differences in rate of gas production from cell walls of different soybean varieties was a function of extraction contaminants or a result of the differences in cell wall composition. Caution is urged in the use of detergent-based cell wall extraction methods in fermentation trials.