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Mean log10 CFU of P. fluorescens SBW25 per centimeter of wheat root grown in microcosms of sandy loam soil in relation to presence or absence of nematode community (A), position on roots that had been divided into equal thirds from the spermosphere (top) to the root tip (bottom) (B), and matric potential of soil (C). (D) The interaction between matric potential and presence (▪) or absence (□) of nematodes. LSD, least significant difference. P = 0.05, 48 degrees of freedom.
