Document Detail


Do colonization by dark septate endophytes and elevated temperature affect pathogenicity of oomycetes?
MedLine Citation:
PMID:  22587673     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Phialocephala subalpina is one of the most frequent dark septate root endophytes (DSE) in tree roots but its function in forest ecosystems is largely unknown. A full factorial infection experiment was performed, using six P. subalpina isolates, two pathogenic oomycetes (Phytophthora plurivora [syn. P. citricola s.l.] and Elongisporangium undulatum [syn. Pythium undulatum]), and two temperature regimes (17.9°C and 21.6°C) to examine the ability of P. subalpina to protect Norway spruce seedlings against root pathogens. Seedling survival, disease intensity and seedling growth were affected by P. subalpina genotype, temperature and pathogen species. Some P. subalpina isolates effectively reduced mortality and disease intensity caused by the two pathogens. Elevated temperature adversely affected seedling growth but did not aggravate the effect of the pathogens. E. undulatum but not P. plurivora significantly reduced plant growth. Colonization density of P. subalpina measured by quantitative PCR was not affected by temperature or the presence of the pathogens. In conclusion, P. subalpina confers an indirect benefit to its host and might, therefore, be tolerated in natural ecosystems, despite negative effects on plant health and plant growth. © 2012 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.
Authors:
Christoph Tellenbach; Thomas N Sieber
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-16
Journal Detail:
Title:  FEMS microbiology ecology     Volume:  -     ISSN:  1574-6941     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8901229     Medline TA:  FEMS Microbiol Ecol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.
Affiliation:
Eawag, Aquatic Ecology, Überlandstr. 133, CH-8600, Dübendorf, Switzerland.
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