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Do Queensland cattle possess rumen bacteria capable of degrading Leucaena toxins?

Gravel, J. L., Gilbert, R. A., Maguire, A. J., Minchin, C. M. and Ouwerkerk, D. (2022) Do Queensland cattle possess rumen bacteria capable of degrading Leucaena toxins? In: Australian Association of Animal Sciences 34th Biennial Conference 2022, 5–7 July 2022, Cairns, Queensland.


Publisher URL: https://www.publish.csiro.au/AN/pdf/ANv62n11abs


Leucaena leucocephala is a leguminous fodder tree used by northern Australian producers to provide protein and boost the weight gains of extensively grazing cattle. There is a range of commercial Leucaena cultivars available which all contain a toxic non-protein amino acid, mimosine. Many rumen bacteria can degrade mimosine to 3,4-dihydroxypyridine (3,4-DHP), which is also toxic to cattle. To enable cattle to safely gain the full benefits of Leucaena, a bacterium, Synergistes jonesii, was isolated that could degrade the toxic metabolites 3,4 DHP and 2,3-hydroxypyridine (2,3-DHP) (Allison et al. 1992). A fermenter-grown mixed bacterial inoculum, containing S. jonesii, has been produced by DAF for over 20 years as an oral drench for cattle to prevent Leucaena toxicity and maximise weight gains (Klieve et al. 2002).

Item Type:Conference or Workshop Item (Paper)
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Animal Science
Additional Information:Anchoring knowledge – exploring the animal science ecosystem Proceedings of the Australian Association of Animal Sciences Volume 34
Subjects:Plant culture > Field crops
Plant culture > Field crops > Forage crops. Feed crops
Animal culture > Cattle
Animal culture > Cattle > Dairying
Animal culture > Rangelands. Range management. Grazing
Animal culture > Feeds and feeding. Animal nutrition
Live Archive:20 Sep 2023 04:46
Last Modified:20 Sep 2023 04:46

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