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Interactions Between the Soybean Cyst Nematode and Fusarium solani f. sp. glycines Based on Greenhouse Factorial Experiments

Permanent URL:
http://handle.nal.usda.gov/10113/2173
Abstract:
The soybean cyst nematode, Heterodera glycines, and the fungus that causes sudden death syndrome (SDS) of soybean, Fusarium solani f. sp. glycines, frequently co-infest soybean (Glycine max) fields. The interactions between H. glycines and F. solani f. sp. glycines were investigated in factorial greenhouse experiments with different inoculum levels of both organisms on a soybean cultivar susceptible to both pathogens. Measured responses included root and shoot dry weights, H. glycines reproduction, area under the SDS disease progress curve, and fungal colonization of roots. Both H. glycines and F. solani f. sp. glycines reduced the growth of soybeans. Reproduction of H. glycines was suppressed by high inoculum levels but not by low levels of F. solani f. sp. glycines. The infection of soybean roots by H. glycines did not affect root colonization by the fungus, as determined by real-time polymerase chain reaction. Although both pathogens reduced the growth of soybeans, H. glycines did not increase SDS foliar symptoms, and statistical interactions between the two pathogens were seldom significant. bes, pathogen population ecology, quantitative plant pathology.
Author(s):
Gao, X. , Jackson, T.A. , Hartman, G.L. , Niblack, T.L.
Subject(s):
Glycine max , soybeans , Heterodera glycines , plant parasitic nematodes , fungal diseases of plants , Fusarium solani , plant pathogenic fungi , pathogenicity , signs and symptoms (plants) , roots , shoots , mixed infection , inoculum density
Format:
p. 1409-1415.
Note:
Includes references
Source:
Phytopathology 2006 Dec., v. 96, no. 12
Language:
English
Year:
2006
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
File:
Download [PDF File]
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.