In the spring of 2008 a brown wood rot in 40-year-old orange trees (Citrus sinensis cv. Valencia late) was observed in an orchard in the province of Taranto , Apulia region, Southern Italy . Affected trees (about 20%), showed symptoms of leafchlorosis, twig dieback and branch breakdown. In the incipient stage of decay the wood showed a yellow-brown discoloration (Fig. 1), which progressed into a wood rot. The fungal mycelium, consistently isolated from decaying wood on potato dextrose agar (PDA), was white, slow growing, slightly raised and cottony-floccose (Fig. 2), with a distinct mushroom odour; hyphae were hyaline, thin-walled, nodose-septate and branched. Representative isolates had identical internal transcribed spacer (ITS) regions (GenBank Accession Nos. HM126455 to HM126460) and were identified as Fomitopsis sp. since their sequences showed 99-100% identity with available sequences in GenBank.

Fomitopsis sp. causing brown rot in wood of living citrus trees reported for first time in southern Italy.

CACCIOLA, Santa Olga;
2010-01-01

Abstract

In the spring of 2008 a brown wood rot in 40-year-old orange trees (Citrus sinensis cv. Valencia late) was observed in an orchard in the province of Taranto , Apulia region, Southern Italy . Affected trees (about 20%), showed symptoms of leafchlorosis, twig dieback and branch breakdown. In the incipient stage of decay the wood showed a yellow-brown discoloration (Fig. 1), which progressed into a wood rot. The fungal mycelium, consistently isolated from decaying wood on potato dextrose agar (PDA), was white, slow growing, slightly raised and cottony-floccose (Fig. 2), with a distinct mushroom odour; hyphae were hyaline, thin-walled, nodose-septate and branched. Representative isolates had identical internal transcribed spacer (ITS) regions (GenBank Accession Nos. HM126455 to HM126460) and were identified as Fomitopsis sp. since their sequences showed 99-100% identity with available sequences in GenBank.
2010
wood rot; Citrus limon; ITS regions; Citrus aurantium; Citrus sinensis
File in questo prodotto:
File Dimensione Formato  
Roccotelli New Dis Report 2010.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Non specificato
Dimensione 445.18 kB
Formato Adobe PDF
445.18 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/32671
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact