KNAW Repository

Biodiversity and biogeography of Fusarium species from northeastern North American asparagus fields based on microbiological and molecular approaches

Vujanovic, V. and Hamel, C. and Yergeau, E. and St-Arnaud, M. (2006) Biodiversity and biogeography of Fusarium species from northeastern North American asparagus fields based on microbiological and molecular approaches. Microbial Ecology, 51, 242-255. ISSN 0095-3628.

[img]PDF - Published Version
Restricted to KNAW only

801Kb

Official URL: http://dx.doi.org/10.1007/s00248-005-0046-x

Abstract

Sixteen Fusarium species were recovered from 52 asparagus commercial fields, representing all major ecological (edaphic and climatic) area of asparagus production in the province of Québec, eastern Canada. This study extends our understanding of the geographic range of these species. It also provides climatological and edaphic properties linked to community changes and adaptations. Fusarium oxysporum and F. proliferatum were omnipresent and abundant in all five ecological area under study, whereas F. redolens was less frequently found. Species of Fusarium that produce carmine red pigmentation on potato dextrose agar, i.e., F. acuminatum, F. avenaceum, etc., were common at the northern limit of asparagus production. Abundance of red Fusarium species corresponded with a low isolation frequency of F. proliferatum. Nevertheless, F. proliferatum had a high recovery rate throughout Québec asparagus growing areas, under climatic conditions as cold as those of northern Europe where this species is uncommon in asparagus fields. In the light of these results, redefinition of the geographical distribution of F. proliferatum in asparagus fields is proposed. Intraspecific molecular differences in F. proliferatum and F. oxysporum were detected in the EF-1 alpha sequences and compared with well-characterized strains of North America.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:12069
Deposited On:23 Nov 2011 01:00
Last Modified:31 Mar 2014 10:59

Repository Staff Only: item control page