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Updated: Jun 10, 2026

Quantification of Fungal Colonization, Sporogenesis, and Production of Mycotoxins Using Kernel Bioassays
Published on: April 23, 2012
Amatoxin and phallotoxin concentration in amanita bisporigera spores
Tristan A Mcknight1, Karl B Mcknight, Matthew C Skeels
1Brigham Young University, Provo, Utah 84604, USA. kmcknight@stlawu.edu
Abstract:
Even though amatoxins and phallotoxins have been well characterized in basidiocarps of Amanita species, to our knowledge no report of these toxins in spores of Amanitas has been published. Reversed phase HPLC was used to determine non-zero concentrations of alpha-amanitin (0.30 mg/g), and phallacidin (0.02 mg/g) in spores taken from white Amanita sect. phalloideae species. We did not find significant amounts of phalloidin in Amanita spores. We also report concentrations of these toxins from pileus and stipe tissues that are similar to previously reported values, lending support to the hypothesis that toxin concentrations in spores are much less than in other basidiocarp tissues.
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