Alkaloid levels of a tall larkspur species in southwestern Alberta
Issue Date
2000-03-01Keywords
Delphinium glaucumhigh performance liquid chromatography
developmental stages
Alberta
Delphinium
diterpenoid alkaloids
methyllycaconitine
Metadata
Show full item recordCitation
Majak, W., McDiarmid, R. E., Hall, J. W., & Willms, W. (2000). Alkaloid levels of a tall larkspur species in southwestern Alberta. Journal of Range Management, 53(2), 207-210.Publisher
Society for Range ManagementJournal
Journal of Range ManagementAdditional Links
https://rangelands.org/Abstract
Tall larkspurs (Delphinium spp.) are widely distributed in western North America and they kill more cattle on rangelands than any other poisonous plant. In Alberta, Canada, D. brownii Rydb. has a long history of causing cattle poisoning. The neurotoxic norditerpenoid alkaloid methyllycaconitine (MLA) was first detected in D. brownii over 50 years ago. A 2-year (1996 to 1997) survey was conducted on the levels of MLA in D. brownii collected at 5 sites in the foothills of southwestern Alberta. The vegetative stage of growth yielded the highest levels of MLA and the decline and change in concentration during that interval could be predicted on the basis of Julian day alone. The MLA levels during bud to pod development were not significantly different but they exceeded the reported levels for MLA in low larkspur by 5-to 10-fold. A new method is described for the determination of MLA by HPLC.Type
textArticle
Language
enISSN
0022-409Xae974a485f413a2113503eed53cd6c53
10.2307/4003284