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    • Journal of Range Management, Volume 53 (2000)
    • Journal of Range Management, Volume 53, Number 2 (March 2000)
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    Alkaloid levels of a tall larkspur species in southwestern Alberta

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    Author
    Majak, W.
    McDiarmid, R. E.
    Hall, J. W.
    Willms, W.
    Issue Date
    2000-03-01
    Keywords
    Delphinium glaucum
    high performance liquid chromatography
    developmental stages
    Alberta
    Delphinium
    diterpenoid alkaloids
    methyllycaconitine
    
    Metadata
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    Citation
    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 Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643749
    DOI
    10.2307/4003284
    10.2458/azu_jrm_v53i2_majak
    Additional 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
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003284
    Scopus Count
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    Journal of Range Management, Volume 53, Number 2 (March 2000)

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