Variability in the content and composition of alkaloids found in canadian ergot. I. Rye
Titel:
Variability in the content and composition of alkaloids found in canadian ergot. I. Rye
Auteur:
Young, J. Christopher
Verschenen in:
Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes
Paginering:
Jaargang 16 (1981) nr. 1 pagina's 83-111
Jaar:
1981
Inhoud:
The total alkaloid content and individual alkaloid composition were determined by colorimetry and high performance liquid chroma-tography, respectively, for Canadian rye ergot sclerotia. The total alkaloid content was highly variable between sclerotia from the same head, field, or region and ranged from 0.011 to 0.452% (av. 0.249%). Levels were lowest in ergot from Prince Edward Island. The individual alkaloid composition was uniform throughout a single sclerotium or in different sclerotia from the same head, somewhat uniform for averages in different fields throughout a region, but highly variable from head to head in a given field. On a regional basis, ergotamine followed by ergocristine were the major alkaloids observed in the east whereas the order wasreversed in the west. Ergometrine, ergosine, ergocornine, and ergocryptine were also observed to a lesser degree; ergostine was not observed. Isomerization of ergometrine increased from near 0% in the east to about 40% in the west, but was relatively constant (about 30%) for the peptide alkaloids in all regions.
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