Gnomoniaceae

Asteroma coryli ( Hauotfruchtform: Gnomoniella coryli ): causative agent of hazelnut leaf blight

The Gnomoniaceae form a family of the order Diaporthales.

Features

According to Monod (1983 ), the Gnomoniaceae are characterized by sunken fruit bodies ( ascomata ) separately without the stroma or in aggregates summarized in reduced prosenchymatischem Stromata in herbaceous plants, especially in leaves and stem axis, but also in wood. The ascomata are generally soft textured, thin-walled and prosenchymatisch with central or lateral protuberance. The asci may have a pronounced Apikalring with generally small ascospores that are smaller than 25 microns long, septate or may be unseptiert. The anamorphs are acervular or pyknidial, usually with a wide mouth and usually phialidischen unseptierten conidia.

Ecology

Gnomoniaceen usually come to hardwood trees in front, but also on conifers as the anamorphic genus Sirococcus. There have been described several diseases they cause, but have been described as endophytes.

Genera ( selection)

• Gnomonia: possibly not monophyletic
• Gnomoniella: causative agent of anthracnose in, inter alia, Hornbeam and hazel
• Apiognomonia: causative agent of anthracnose on oak, beech and sycamore
• Cryptodiaporthe: Cryptodiaporthe populea is the pathogen of cattle brands of the poplar
• Cryptosporella
• Pleuroceras: Pleuroceras pseudoplatani: causative agent of sycamore leaf blight

Mazzantia has recently been made ​​to the Diaporthaceae.