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Titolo:
VARIABILITY OF VIRULENCE OF NECTRIA-GALLIGENA TOWARDS NORTHERN HARDWOODS
Autore:
PLANTE F; BERNIER L;
Indirizzi:
UNIV LAVAL,FAC FORESTERIE & GEOMAT,CTR RECH BIOL FORESTIERE,CITE UNIVQUEBEC CITY PQ G1K 7P4 CANADA
Titolo Testata:
European journal of forest pathology
fascicolo: 4, volume: 27, anno: 1997,
pagine: 261 - 272
SICI:
0300-1237(1997)27:4<261:VOVONT>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PEACH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
F. Plante e L. Bernier, "VARIABILITY OF VIRULENCE OF NECTRIA-GALLIGENA TOWARDS NORTHERN HARDWOODS", European journal of forest pathology, 27(4), 1997, pp. 261-272

Abstract

The variability of virulence within a Quebec population of the fungalpathogen Nectria galligena was was studied under greenhouse conditions. Preliminary, small-scale inoculation of Betula alleghaniensis saplings confirmed that wounds have to be present for successful infection by N. galligena and showed that saplings held at 10 degrees C exhibited a broader range in necrotic zone length han saplings held at 24 degrees C for 6 weeks. Results from the inoculation of B. alleghaniensis saplings with eight full-sib progeny sets of four siblings each of N. galligena showed a wide range of virulence in this pathogen. The observed variability was probably of genetic origin since, in seven cases out of eight, one of the four siblings of a given family was significantly different from at least one other sibling of the same family. Inoculation of B. alleghaniensis saplings with a population of 43 isolates originating from different host species and geographical locations further confirmed the variability of virulence within N. galligena but failed to indicate a relationship between virulence and host. or geographic provenance. Inoculation of six additional deciduous tree species with a subset of nine isolates showed the polyphagous character of the pathogen, as lesions of comparable length were generally observed on five of the species tested. None of the nine isolates tested induced any necrosis on Fraxinus americana whereas Quercus macrocarpa tended to be slightly more resistant than the four remaining true species.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 05:20:46