Patagonian Tree Gall (IMAGE)

University of Wisconsin-Madison

Patagonian Tree Gall

Caption

Tree galls on Patagonian beech trees were the first places researchers found the yeast Saccharomyces eubayanus in nature. Five hundred years ago, the yeast fused with the well-known bread and wine yeast Saccharomyces cerevisiae to form an interspecies hybrid that lets people cold brew lager beer.

Credit

Diego Libkind, Institute for Biodiversity and Environment Research, Bariloche, Argentina

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