A beauvericin hot spot in the genus Isaria.

Beauvericin is a naturally occurring cyclohexadepsipeptide originally described from Beauveria bassiana but also reported from several Fusarium species as well as members of the genus Isaria. Twenty-six isolates of Isaria species and its Cordyceps teleomorph, and ten taxonomically close strains including Beauveria, Nomuraea and Paecilomyces species were sequenced and tested for beauvericin production. Trees using ITS rDNA and beta-tubulin sequence data were constructed and used to infer the phylogenetic distribution of beauvericin production.

Aurocitrin and related polyketide metabolites from the wood-decay fungus Hypocrea sp. BCC 14122.

The known gentisaldehyde antibiotic aurocitrin (1), its cis-olefinic isomer (2), a salicylaldehyde analogue (3), two new benzofuran derivatives (4 and 5), and a new dihydroisocoumarin (6) were isolated from the wood-decay fungus Hypocrea sp. BCC 14122. The structures were elucidated primarily by NMR and mass spectroscopic analyses.