Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 63747
Title Ineffective Frankia and host resistance in natural populations of Alnus glutinosa (L.) Gaertn
Author(s) Wolters, D.J.; Dijk, C. van; Akkermans, A.D.L.; Woldendorp, J.W.
Source Acta Oecologica-International Journal of Ecology 20 (1999)2. - ISSN 1146-609X - p. 71 - 79.
Department(s) Microbiological Laboratory
Publication type Refereed Article in a scientific journal
Publication year 1999
Abstract Alnus glutinosa (black alder) populations are known to exhibit a variable degree of incompatibility to root nodule formation by ineffective Frankia. The relationship between the occurrence of ineffective Frankia in wet stands of black alder and the degree of resistance to nodulation by ineffective Frankia of seed-lots and clones of alder trees from these particular locations was studied through soil inoculation experiments. The average percentage of resistant plants (R-frequency) among the seed-lots from locations with an ineffective Frankia soil population was equal to, or higher than, the R-frequencies of locations without ineffective Frankia. The mean R-frequency was highest for the seed-lots from the location from which the soil inoculant was taken. These results strongly suggest that ineffective Frankia are not strictly dependent on susceptible A. glutinosa for the maintenance of their population size. The fungus Penicillium nodositatum also nodulated A. glutinosa seedlings. Whereas a negative interaction with the ineffective Frankia nodulation was found, this did not have a significant effect on the R-frequencies of the seed-lots that were tested, suggesting that the ineffective Frankia nodulation adversely affected the myco-nodulation, and not vice versa.
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