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Ultrastructure of Infection of Cyst Nematode Eggs By the Nematophagous Fungus Verticillium Suchlaspori Um

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Ultrastructural studies showed that strains of Verticillium suchlasporium isolated from eggs of Heterodera avenae, infected in vitro eggs of H. avenae and Globodera pallida. In H. avenae, V suchlasporium formed appressoria at the point of infection. In serial sections it was observed that a narrow penetration hypha perforated the egg-shell and formed an infection bulb. Other types of penetration hyphae and germinating conidia were also found. Areas of low electron-density were frequently observed, suggesting the secretion of enzymes by V. suchlasporium to weaken the egg-shell. Penetration of eggs of G. pallida was similar to that described for H. avenae, but the egg-shell of G. pallida was twice as thick as that of H. avenae (approximately 500 nm). Ultrastructure of infection of cyst nematode eggs by V. suchlasporium has features in common with other nematophagous fungi.

Affiliations: 1: Departamento de Ciencias Ambientales y Recursos Naturales, Universidad de Alicante, Aptdo. Correos 99, 03080 Alicante, Spain; 2: Department of Zoology, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, Scotland

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/content/journals/10.1163/187529293x00042
1993-01-01
2016-12-07

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