Are any mushrooms known to contain hydroxylamines?

Bruce A. Caldwell caldwelb at
Mon Aug 13 03:57:20 EST 2001

Hydroxamate-based siderophores (specific iron chelators) are widely produced
by fungi, including mycorrhiza-formers and wood-rotters.  Bacteria generally
produce catechol-based siderophores, although there are a few exceptions.

Bruce Caldwell
Forest Science
Oregon State University
Corvalls OR  97331-5752

bruce.caldwell at

John Chalmers wrote:

> I'd like to know too. Hydroxylamine and its simple alkyl derivatives are
> laboratory mutagens-- I've used it and methoxylamine in the past to
> mutate Neurospora conidia back in the Pleistocene when I was a fungal
> geneticist.  I believe they react with cytosine to form an adduct that
> mispairs with Adenine instead of the normal Guanine, but I'd have to
> look it up this AM.
> Salicylhydroxamic acid is respiratory inhibitor in Neurospora and other
> organism, probably, IIRC, by chelating iron in the respiratory chain.
> Some bacteria produce hydroxamic acid derivatives to scavenger iron and
> I see no reason why fungi might not also.
> --John

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