Variable compatibility of cloned Alnus glutinosa ecotypes against ineffective Frankia strains

Nodulation tests on in-vitro propagated clones of Alnus glutinosa ecotypes (forest ecotype, pioneer ecotype) with Frankia strains originating from both ecotypes indicated differences in host-plant compatibility. Inoculated plants of the pioneer ecotype clone were not infected by strains, that were u...

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Bibliographic Details
Published in:Plant and soil 1988-04, Vol.107 (2), p.233-243
Main Authors: HAHN, D., STARRENBURG, M.J.C., AKKERMANS, A.D.L.
Format: Article
Language:English
Subjects:
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
Alkynes
Biological and medical sciences
Economic plant physiology
Frankia
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
Hyphae
Inoculation
Laboratorium voor Microbiologie
Microbiological Laboratory
Microbiologie
Microbiology
Nitrogen
Nodulation
Nodules
Plants
Sporangia
Spores
Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:Nodulation tests on in-vitro propagated clones of Alnus glutinosa ecotypes (forest ecotype, pioneer ecotype) with Frankia strains originating from both ecotypes indicated differences in host-plant compatibility. Inoculated plants of the pioneer ecotype clone were not infected by strains, that were unable to fix nitrogen in pure culture. Nodulation could only be induced on the clone of the forest ecotype, but no nitrogen-fixing activity could be detected. Ultra-structural observations of the nodules by SEM and TEM indicated that ineffectivity of these strains was correlated with the lack of vesicles in the infected cells. Cells were only filled with hyphae: neither sporangia nor vesicles could be detected. In contrast, effective nodules could be obtained on both alder clones after inoculation with an effective strain, showing normal development of vesicle clusters in infected cells. In pure culture the ineffective strains produced no vesicles; sporangia were found only during early stage of growth. The results demonstrate the existence of Frankia strains which were either non-infective or ineffective on different clones of Alnus glutinosa.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF02370552