Germination of Fusarium oxysporum in root exudates from tomato plants challenged with different Fusarium oxysporum strains

The response of microconidia from pathogenic and non-pathogenic Fusarium oxysporum to root exudates from tomato plants inoculated with different pathogenic and non-pathogenic F. oxysporum strains was studied. Root exudates from non-inoculated tomatoes highly stimulated the microconidial germination...

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Bibliographic Details
Published in:European journal of plant pathology 2008-11, Vol.122 (3), p.395-401
Main Authors: Steinkellner, Siegrid, Mammerler, Roswitha, Vierheilig, Horst
Format: Article
Language:English
Subjects:
Agriculture
Biological and medical sciences
Biological control
Biomedical and Life Sciences
Ecology
Fundamental and applied biological sciences. Psychology
Fungal plant pathogens
Fungi
Fusarium root rot
Fusarium wilt
Life Sciences
Microconidial germination
Pathogens
Phytopathology. Animal pests. Plant and forest protection
Plant Pathology
Plant Sciences
Plant-fungus interaction
Response
Rhizosphere
root exudates
Studies
Tomatoes
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Summary:The response of microconidia from pathogenic and non-pathogenic Fusarium oxysporum to root exudates from tomato plants inoculated with different pathogenic and non-pathogenic F. oxysporum strains was studied. Root exudates from non-inoculated tomatoes highly stimulated the microconidial germination of the two tomato pathogens, F. oxysporum f.sp. lycopersici strain Fol 007 and F. oxysporum f.sp. radicis-lycopersici strain Forl 101587. In root exudates from tomato plants challenged with the pathogen Fol 007 the microconidial germination of Fol 007 was increased, whereas in root exudates from plants challenged with Forl 101587 the microconidial germination of Fol 007 was reduced. Root exudates of tomato plants challenged with the non-pathogenic unspecific F. oxysporum strain Fo 135 and the biocontrol strain Fo 47 clearly reduced microconidial germination of the pathogenic strain Forl 101587. Moreover, the microconidial germination rate of the biocontrol strain Fo 47 was increased in the presence of root exudates of tomato plants challenged with the tomato wilt pathogen Fol 007. These results indicate that pathogenic and non-pathogenic F. oxysporum strains alter the root exudation of tomato plants differently and consequently the fungal propagation of pathogenic and non-pathogenic F. oxysporum strains in the rhizosphere is affected differently.
ISSN:0929-1873
1573-8469
DOI:10.1007/s10658-008-9306-1