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- Title
UNUSUAL OCCURRENCE OF SCHIZOPHYLLUM COMMUNE ON YOUNG TOPGRAFTED CITRUS.
- Authors
Russo, M.; Licciardello, G.; Bella, P.
- Abstract
Many fungal organisms colonize dead wood of old or wounded citrus and are morphologically detected by the large sporocarps they produce. Among them are some species of the genera Daldinia, Ganoderma, Polyporus, Stereum, Fomes and Schizophyllum commune as well. Here we report about a severe collapse of living citrus associated to rootstock infection by S. commune. These symptoms were observed in a 15 year-old Fortune Mandarin on Troyer citrange, spaced 3 m by 4 m. Failed topgrafted trees started to show vertical cracking of bark and discoloration of the wood within six months. In cross sections of the trunk the area of affected wood was usually confined to a section. An abundant production of basidiocarps of S. commune were also observed on the rootstock. Direct DNA extraction from lyophilized fruit bodies was carried out. ITSII gene region was amplified using specific Schizophyllum spp. primers pairs Schi2R/ITS3 revealing the presence of the expected size amplicon. S. commune is a sap-rot basidiomycete and cosmopolitan species, reported to be a pathogen of humans and trees. Usually it adapts a saprobic lifestyle by causing white rot. In specific conditions it behaves as plant pathogen of living trees and many plant species, including fruit and ornamental trees. To our knowledge, this is the first report of S. commune causing disease on living citrus in Italy.
- Subjects
CITRUS diseases &; pests; ROOTSTOCKS; SCHIZOPHYLLUM commune; FUNGAL diseases of plants; PHYTOPATHOGENIC fungi; PLANT diseases
- Publication
Journal of Plant Pathology, 2012, Vol 94, Issue 4, pS4.77
- ISSN
1125-4653
- Publication type
Article