Abstract
In pathogenesis, a critical first step is the initial contact and colonization of the host by the pathogen. Little is known about this initial host-parasite interaction for the soil-borne pathogens involved in vascular wilt diseases: particularly under natural conditions. The lack of information is in large part due to the location where these initial interactions occur. The soil is not a media that facilitates direct observation. Additionally, since many fungi colonize the roots of plants, investigations focused on a single organism in the presence of all the others have been difficult. A number of features have been established. The fungal pathogens persist in soil for extended periods of time as dormant propagules. For Verticillium dahliae Kleb., longevity of microsclerotia extends for years to decades. These propagules will germinate in response to root exudates (Rovira 1965; Schreiber and Green 1963). Since exudates are greatest in the zone of elongation, it is suggestive that at least some of the initial contact occurs near this site. Little is known about what happens between germination in response to root exudates and the detection of the pathogen in the vascular system.
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© 1989 Springer-Verlag Berlin Heidelberg
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Huisman, O.C., Gerik, J.S. (1989). Dynamics of Colonization of Plant Roots by Verticillium Dahliae and Other Fungi. In: Tjamos, E.C., Beckman, C.H. (eds) Vascular Wilt Diseases of Plants. NATO ASI Series, vol 28. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-73166-2_1
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DOI: https://doi.org/10.1007/978-3-642-73166-2_1
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