Ultrastructural and cell wall modifications during infection of <i>Eucalyptus viminalis</i> roots by a pathogenic <i>Fusarium oxysporum</i> strain

<i>Fusarium</i> species are soil-borne fungal pathogens that produce a variety of disease symptoms when attacking crop plants. The mode of root colonization of <i>Eucalyptus viminalis</i> seedlings by a pathogenic <i>F. oxyporum</i> strain (Foeu1) at the ultrastru...

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Detalles Bibliográficos
Autores principales: Salerno, María Isabel, Gianinazzi, Silvio, Arnould, Christine, Gianinazzi-Pearson, Vivienne
Formato: Articulo
Lenguaje:Inglés
Publicado: 2004
Materias:
Ciencias Agrarias
Root pathogenesis
Fusarium oxysporum
Eucalyptus viminalis
Ultrastructure
Pectin
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/141454
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-141454
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Root pathogenesis
Fusarium oxysporum
Eucalyptus viminalis
Ultrastructure
Pectin
spellingShingle Ciencias Agrarias
Root pathogenesis
Fusarium oxysporum
Eucalyptus viminalis
Ultrastructure
Pectin
Salerno, María Isabel
Gianinazzi, Silvio
Arnould, Christine
Gianinazzi-Pearson, Vivienne
Ultrastructural and cell wall modifications during infection of <i>Eucalyptus viminalis</i> roots by a pathogenic <i>Fusarium oxysporum</i> strain
topic_facet Ciencias Agrarias
Root pathogenesis
Fusarium oxysporum
Eucalyptus viminalis
Ultrastructure
Pectin
description <i>Fusarium</i> species are soil-borne fungal pathogens that produce a variety of disease symptoms when attacking crop plants. The mode of root colonization of <i>Eucalyptus viminalis</i> seedlings by a pathogenic <i>F. oxyporum</i> strain (Foeu1) at the ultrastructural level and changes in cell wall pectin during host pathogen interactions are described. Root systems of <i>E. viminalis</i> plants were inoculated with <i>F. oxysporum</i> in an in vitro model system. Hyphae of <i>F. oxysporum</i> adhered to the outer epidermal cell walls through fibrillar material, and after penetration they spread into the internal tissues. They developed intercellularly and intracellularly in the root cortex and invaded vascular tissues. Papillae were induced, and the host plasma membrane ruptured in colonized cells, causing rapid host tissue and cell damage. Changes in distribution and occurrence of nonesterified and methyl-esterified pectins were evaluated after root colonization by <i>F. oxysporum</i> using two monoclonal antibodies, JIM 5 and JIM 7, respectively. Nonesterified pectin in control roots was mainly localized in the epidermal cell walls and middle lamellae in parenchymal cortex, whereas methyl-esterified pectin accumulated more in primary cell walls of the cortex and phloem. Decreases in immunodetected nonesterified and methyl-esterified pectins were associated with extensive plant tissue degradation after root colonization by the pathogenic fungus.
format Articulo
Articulo
author Salerno, María Isabel
Gianinazzi, Silvio
Arnould, Christine
Gianinazzi-Pearson, Vivienne
author_facet Salerno, María Isabel
Gianinazzi, Silvio
Arnould, Christine
Gianinazzi-Pearson, Vivienne
author_sort Salerno, María Isabel
title Ultrastructural and cell wall modifications during infection of <i>Eucalyptus viminalis</i> roots by a pathogenic <i>Fusarium oxysporum</i> strain
title_short Ultrastructural and cell wall modifications during infection of <i>Eucalyptus viminalis</i> roots by a pathogenic <i>Fusarium oxysporum</i> strain
title_full Ultrastructural and cell wall modifications during infection of <i>Eucalyptus viminalis</i> roots by a pathogenic <i>Fusarium oxysporum</i> strain
title_fullStr Ultrastructural and cell wall modifications during infection of <i>Eucalyptus viminalis</i> roots by a pathogenic <i>Fusarium oxysporum</i> strain
title_full_unstemmed Ultrastructural and cell wall modifications during infection of <i>Eucalyptus viminalis</i> roots by a pathogenic <i>Fusarium oxysporum</i> strain
title_sort ultrastructural and cell wall modifications during infection of <i>eucalyptus viminalis</i> roots by a pathogenic <i>fusarium oxysporum</i> strain
publishDate 2004
url http://sedici.unlp.edu.ar/handle/10915/141454
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