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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/3855

Title: Multi-gene analysis and morphology reveal novel Ilyonectria species associated with black foot disease of grapevines
Authors: Cabral, Ana
Rego, Cecília
Nascimento, Teresa
Oliveira, Helena
Groenewald, Johannes
Crous, Pedro W.
Keywords: Cylindrocarpon macrodidymum
Ilyonectria
phylogeny
systematics
Issue Date: 2012
Publisher: Elsevier
Citation: "Fungal Biology". ISSN 1878-6146. 116 (2012) 62-80
Abstract: Black foot is an important disease of grapevines, which has in recent years been recorded with increased incidence and severity throughout the world, affecting grapevines both in nurseries and young vineyards. In the past the disease has been associated with infections by Ilyonectria macrodidyma, Ilyonectria liriodendri, Campylocarpon fasciculare, and Campylocarpon pseudofasciculare. Based on published data, a high level of genetic diversity was detected among isolates of I. macrodidyma. To resolve this issue, we employed a multigene analysis strategy (based on the b-tubulin, histone H3, translation elongation factor 1-a, and the internal transcribed spacers on both sides of the 5.8S nuclear ribosomal RNA gene) along with morphological characterisation to study a collection of 81 I. macrodidyma-like isolates from grapevine and other hosts. Morphological characters (particularly conidial size) and molecular data (highest resolution achieved with histone H3 nucleotide sequence) enabled the distinction of six monophyletic species within the I. macrodidyma complex, four of which (Ilyonectria alcacerensis, Ilyonectria estremocensis, Ilyonectria novozelandica, and Ilyonectria torresensis) are described here. This work forms part of an effort by the International Council on Grapevine Trunk Diseases to resolve the species associated with black foot disease, which we believe will clarify their taxonomy, and therefore help researchers to devise control strategies to reduce the devastating impact of this disease
Peer Reviewed: yes
URI: http://hdl.handle.net/10400.5/3855
ISSN: 1878-6146
Publisher version: www.elsevier.com/locate/funbio
Appears in Collections:DCEB - Artigos de Revistas

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