Pyrrolizidine alkaloids in Crotalaria taxa from Northern Australia: Risk to grazing livestock

Fletcher, Mary T., Mckenzie, Ross A., Blaney, Barry J. and Reichmann, Keith G. (2009) Pyrrolizidine alkaloids in Crotalaria taxa from Northern Australia: Risk to grazing livestock. Journal of Agricultural and Food Chemistry, 57 1: 311-319. doi:10.1021/jf8026099


Author Fletcher, Mary T.
Mckenzie, Ross A.
Blaney, Barry J.
Reichmann, Keith G.
Title Pyrrolizidine alkaloids in Crotalaria taxa from Northern Australia: Risk to grazing livestock
Journal name Journal of Agricultural and Food Chemistry   Check publisher's open access policy
ISSN 0021-8561
1520-5118
Publication date 2009-01
Sub-type Article (original research)
DOI 10.1021/jf8026099
Volume 57
Issue 1
Start page 311
End page 319
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Crotalaria species containing hepatotoxic pyrrolizidine alkaloids grow widely in pastures in northern Australia and have sporadically poisoned grazing livestock. The diverse Crotalaria taxa present in these pastures include varieties, subspecies, and chemotypes not previously chemically examined. This paper reports the pyrrolizidine alkaloid composition and content of 24 Crotalaria taxa from this region and assesses the risk of poisoning in livestock consuming them. Alkaloids present in C. goreensis, C. aridicola subsp. densifolia, and C. medicaginea var. neglecta lack the esterified 1,2-unsaturated functionality required for pyrrole adduct formation, and these taxa are not hepatotoxic. Taxa with high levels of hepatotoxic alkaloids, abundance, and biomass pose the greatest risk to livestock health, particularly C. novae-hollandiae subsp. novae-hollandiae, C. ramosissima, C. retusa var. retusa, and C. crispata. Other species containing moderate alkaloid levels, C. spectabilis and C. mitchellii, also pose significant risk when locally abundant.
Keyword Gas chromatography-mass spectrometry
GC-MS
pyrrolizidine alkaloids
Crotalaria
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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Created: Mon, 07 Mar 2011, 15:01:08 EST