Peer-Reviewed Journal Details
Mandatory Fields
Barea, J.M., Andrade, G., Bianciotto, V., Dowling, D., Lohrke, S., Bonfante, P., O'Gara, F., and Azcon-Aguilar, C.;
1998
April
Applied and Environmental Microbiology
Impact on arbuscular mycorrhiza formation of Pseudomonas strains used as inoculants for biocontrol of soil-borne fungal plant pathogens.
Published
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Optional Fields
METABOLITE 2,4-DIACETYLPHLOROGLUCINOL BIOSYNTHESIS RHIZOSPHERE SUPPRESSION INHIBITORS BACTERIA DISEASE GROWTH
64
6
2304
2307
The arbuscular mycorrhizal symbiosis, a keg component of agroecosystems, was assayed as a rhizosphere biosensor for evaluation of the impact of certain antifungal Pseudomonas inoculants used to control soil-borne plant pathogens. The following three Pseudomonas strains mere tested: wild-type strain F113, which produces the antifungal compound 2,4-diacetylphloroglucinol (DAPG); strain F113G22, a DAPG-negative mutant of F113; and strain F113(pCU203), a DAPG overproducer. Wild-type strain F113 and mutant strain F113G22 stimulated both mycelial development from Glomus mosseae spores germinating in soil and tomato root colonization. Strain F113(pCU203) did not adversely affect G. mosseae performance. Mycelial development, but not spore germination, is sensitive to 10 mu M DAPG, a concentration that might he present in the rhizosphere. The results of scanning electron and confocal microscopy demonstrated that strain F113 and its derivatives adhered to G. mosseae spores independent of the ability to produce DAPG.
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