Mycorrhizal fungi increase biocontrol potential of Pseudomonas fluorescens

Eleni Siasou, Dominic Standing, Ken Killham, David Johnson

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Wheat roots are susceptible to colonisation by soil-borne pathogens, such as Gaeumannomyces graminis var. tritici (Ggt), which causes the globally important disease take-all, and mutualistic arbuscular mycorrhizal fungi (AMF). Certain rhizosphere fluorescent Pseudomonas strains have received much attention as potential biocontrol agents given their ability to produce antibiotics, such as 2,4-diacetyl-phloroglucinol (DAPG), that confer a measure of plant protection. Here we show that Pseudomonas fluorescens only produced DAPG in the presence of soluble carbon from soil containing either Ggt or AMF, and production increased by two orders of magnitude in response to both AMF and Ggt. Encouragement of mycorrhizat colonisation may therefore offer a sustainable strategy for protection against take-all.
Original languageEnglish
Pages (from-to)1341-1343
Number of pages3
JournalSoil Biology and Biochemistry
Issue number6
Publication statusPublished - Jun 2009


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