Occurrences of Trans-Aconitate in Range Forage Species1
- P. R. Stout,
- J. Brownell and
- R. G. Burau2
Young plants of 94 separate species collected largely from hypomagnesemia (grass tetany) prone rangelands during late fall, winter, and early spring, have been analyzed for total aconitate. Species containing 1% or more of their dry weight as aconitate have been classed as accumulators. Forty-seven percent of the grasses and 17% of the nongrass species fell in the high level category. The spread between individual species was very large (0.05 to 12.4%). Of the two aconitate stereoisomers, cis-aconitate was low in all species whereas trans-aconitate built up in the accumulators. Levels of trans-aconitate fell rapidly with the onset of warming spring weather and higher growth rates. Mowings of mixed plant species reflected the aconitate characteristics of accumulator species. Substantial differences in trans-aconitate levels may occur in roots, stems, and leaves of the same plant.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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