Abstract
In this manuscript, we report the isolation and characterization of two secondary metabolites produced by a Gnomoniopsis castanea strain isolated in the Campania region (Italy) from chestnut galls infested with Dryocosmus kuriphilus. The compounds, purified from the fungal culture filtrate by using preparative HPLC-DAD, showed the same spectroscopic data of abscisic acid and 1′,4′-diol of abscisic acid. Phytotoxic activity of the isolated metabolites on chestnut leaves has been also observed.
Highlights
In this manuscript, we report the isolation and characterization of two secondary metabolites produced by a Gnomoniopsis castanea strain isolated in the Campania region (Italy) from chestnut galls infested with Dryocosmus kuriphilus
Many cultivated varieties of chestnut (Castanea spp.) are subjected to severe infestations caused by the chestnut gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae), which can disrupt the fruiting process and reduce a tree's yield by up to 70%
In addition to pest infestation, necrotic symptoms on leaves and galls are often observed due to the development of a gall colonizer identified as the fungus Gnomoniopsis sp. [1]
Summary
We report the isolation and characterization of two secondary metabolites produced by a Gnomoniopsis castanea strain isolated in the Campania region (Italy) from chestnut galls infested with Dryocosmus kuriphilus. In addition to pest infestation, necrotic symptoms on leaves and galls are often observed due to the development of a gall colonizer identified as the fungus Gnomoniopsis sp. The fungus has been associated with nut rot and caused disease symptoms when artificially inoculated on fruits or flowers [2].
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