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The influence of anaerobic fungi on rumen volatile fatty acid concentrations in vivo

, : The influence of anaerobic fungi on rumen volatile fatty acid concentrations in vivo. Journal of Agricultural Science 109(1): 13-18

Elimination of the rumen anaerobic fungi from sheep fed chemically-treated barley straw diets resulted in elevated proportions of propionic acid in rumen liquor (from ca. 0.15 to 0.30). Subsequent inoculation of these sheep with a pure culture of fungus decreased propionate concentrations within 3 days to the levels observed in control animals that possessed abundant fungal populations throughout the experiment. Confirmation that propionate itself was not responsible for the elimination of the fungi was provided by the results of a second experiment in which intraruminal infusions of propionic acid failed to reduce fungal growth or prevent recolonization in sheep previously rendered fungi-free. In a third experiment with sheep fed untreated barley straw, monensin supplementation produced the well known elevation of propionate concentrations. However, this treatment also resulted in the elimination of rumen anaerobic fungi from the animals. The magnitude of the increased concentration of rumen propionic acid, resulting from the elimination of the anaerobic fungal flora, indicates an important role for the fungi in the fermentation of high-fiber diets. In addition, these findings indicate that the well known elevation of propionate levels produced by monensin may likewise be effected directly by removal of the rumen anaerobic fungi.


DOI: 10.1017/s0021859600080928

Other references

Serebriakova, Z.N., 1968: Soviet psychiatry over the past 50 years. Zhurnal Nevropatologii i Psikhiatrii Imeni S.S. Korsakova 68(7): 959-963

Elmadfa I.; Sobirey M., 1988: Influence of n 3 fatty acids on mitochondrial function and stability of erythrocyte membrane of rats in long term experiments with cod liver oil. The influence of different amounts of polyunsaturated fatty acids (PUFA) (1.3, 2.6 and 6.3% of total energy intake) on mitochondrial respiration and the stability of erythrocyte membrane was tested in experiments with rats lasting 12 and 32 weeks....

Jacotot, H.; Vallee, A.; Virat, B., 1955: Appearance in France of a naturally attenuated mutant of myxomatosis virus. The authors have isolated a naturally occurring mutant of the myxomatosis virus, of reduced virulence, about two and a half years after the initial outbreak of myxomatosis in 1952. In experimental animals, the virus does not kill until about 19 da...

Stiassny, M.L.J.; Schelly, R.C.; Schliewen, U.K., 2006: A new species of Raiamas Teleostei Cyprinidae from the lower Congo River, with a phylogenetic assessment of the generic limits of the predatory cyprinid genera Opsaridium, Raiamas, and Leptocypris. In the course of ongoing survey work in the lower Congo River, two collections of an undescribed species of the predatory cyprinid genus Raiamas have been made; one in the Congo main channel in the vicinity of Inga, and a second in the Inkisi Rive...

Hunter, R.H.F., 1979: Ovarian follicular responsiveness and oocyte quality after gonadotrophic stimulation of mature pigs. After a single injection of crossbred Large White pigs with 1500 IU PMSG on day 13 of the oestrous cycle, oestrus was expressed within 5-7 days. However, oestrus was delayed until days 27-29 in 6 gilts injected similarly with PMSG on day 14. Super...

Grimshaw, P.H., 1904: On a new British fly (Hydrotoea pilipes Stein) from the Forth district. Annals of Scottish Natural History, 158-160

Mendilcioglu, I., 2006: Recurrent periclitoral abscess: treatment of a rare cause of vulvar pain. European Journal of Obstetrics, Gynecology, and Reproductive Biology 131(1): 101-102

Takeyama, H.; Kataoka, T.; Yano, K.; Fukutani, H.; Watanabe, E., 1986: Mucosal injury of aclacinomycin A in patients with adult acute leukemia--comparison of BH-AC. AMP therapy and BH-AC. DMP therapy. Japanese Journal of Clinical Hematology 27(4): 508-513

Dokić, M.; Popović, K.; Pejin, D.; Stefanović, N.; Belić, A.; Uzurov, V., 1984: HLA system antigens in acute leukoses. Medicinski Pregled 37(9-10): 379-380

Margiotta, P., 1989: Infant feeding: the food of love. Community Outlook: 6-11