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Bot gummosis of lemon (Citrus × limon) caused by neofusicoccum parvum

Authors :
Mario Riolo
Francesco Aloi
Rossana Parlascino
Santa Olga Cacciola
Antonella Pane
Source :
Journal of Fungi, Vol 7, Iss 294, p 294 (2021), Journal of Fungi, Volume 7, Issue 4
Publication Year :
2021

Abstract

Neofusicoccum parvum, in the family Botryosphaeriaceae, was identified as the causal agent of bot gummosis of lemon (Citrus × limon) trees, in the two major lemon-producing regions in Italy. Gummy cankers on trunk and scaffold branches of mature trees were the most typical disease symptoms. Neofusicoccum parvum was the sole fungus constantly and consistently isolated from the canker bark of symptomatic lemon trees. It was identified on the basis of morphological characters and the phylogenetic analysis of three loci, i.e., the internal transcribed spacer of nuclear ribosomal DNA (ITS) as well as the translation elongation factor 1-alpha (TEF1) and β-tubulin (TUB2) genes. The pathogenicity of N. parvum was demonstrated by wound inoculating two lemon cultivars, ‘Femminello 2kr’ and ‘Monachello’, as well as citrange (C. sinensis × Poncirus trifoliata) ‘Carrizo’ rootstock. In artificial inoculations, the fungus was very aggressive on lemons and weakly virulent on citrange, consistently with symptoms observed in the field as a consequence of natural infections. This is the first report of N. parvum, both in a wide and in a strict taxonomic sense, as a pathogen of lemon in Italy.

Details

Language :
English
Database :
OpenAIRE
Journal :
Journal of Fungi, Vol 7, Iss 294, p 294 (2021), Journal of Fungi, Volume 7, Issue 4
Accession number :
edsair.doi.dedup.....e2047a9015f4cfcde87fd06cfe2fdf70