http://www.cnr.it/ontology/cnr/individuo/prodotto/ID88258

Comparison of Seiridium species causing cankers on Cypress and Eucalyptus. (Contributo in atti di convegno)

Type

Prodotto della ricerca (Classe)
Contributo in atti di convegno (Classe)

Label

Comparison of Seiridium species causing cankers on Cypress and Eucalyptus. (Contributo in atti di convegno) (literal)

Anno

2001-01-01T00:00:00+01:00 (literal)

Alternative label

Moricca S., Raddi P., Torraca G. (2001)
Comparison of Seiridium species causing cankers on Cypress and Eucalyptus.
in Eucalyptus in the Mediterranean basin: perspectives and new utilization, Taormina (Catania)
(literal)

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Moricca S., Raddi P., Torraca G. (literal)

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In the framework of a research collaboration between the Italian CNR and the Australian CSIRO, three canker agents, Seiridium cardinale, S. eucalypti and S. papillatum, were compared using their morphological, molecular and pathogenic characters. The pathogens were first grown in nutrient media and distinguished on the basis of cultural and morphological characteristics such as: growth rate; growth temperature relations; shape, colour and texture of colonies; density of aerial hyphae. The molecular approach, based on PCR-amplification of the ITS region from the ribosomal RNA (rRNA) gene operon followed by restriction fragment length polymorphism (RFLP), allowed rapid differentiation of the three species. The fungi were then compared in a controlled environment for their ability to cause bark cankers on Cupressus sempervirens and Eucalyptus bicostata. Artificial inoculations in the greenhouse confirmed that both S. cardinale and S. eucalypti were highly pathogenic on their preferential hosts (cypress and eucalyptus respectively). A certain degree of pathogenicity was also displayed by S. cardinale towards eucalyptus. S. papillatum was a weak parasite on both angiosperm and gyrnnosperm species. It is concluded that S. eucalypti, never reported outside Australia, is potentially a serious menace also for eucalyptus plantations in the Mediterranean basin. To avoid its accidental introduction, which could compromise the diffusion of eucalyptus in this area, it is of vital importance that the causa1 agent can be promptly recognised. The identification methods presented here, which combine innovative and traditional techniques, have shown to be accurate and reproducible and can be employed by plant protection services for the control of quarantine material. (literal)

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