Streptomyces lividans inhibits the proliferation of the fungus Verticillium dahliae on seeds and roots of Arabidopsis thaliana.
Bottom Line: The extension of hyphae from each individual strain correlates with the reduction of the pectin-containing mucilage-layer.As a result, plants have considerably reduced disease symptoms.As spores of the beneficial S. lividans strain are obtainable in large quantity, its application is highly attractive.
Affiliation: FB Biology/Chemistry, Applied Genetics of Microorganisms, University of Osnabrück, Barbarastr. 13, 49069 Osnabrück, Germany.Show MeSH
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Mentions: Individual seeds of A. thaliana were incubated on agar plates together with S. lividans, for various time‐intervals up to 21 days. Hyphae proliferated extensively within the seed mucilage over the course of 70 h (Fig. 5A, control). The roots of emerging seedlings carried hyphae preferentially at their tip (14 days, Fig. 5B). After further incubation (21 days), bunches of hyphae were sometimes observed alongside of roots (Fig. 5C) and at root hairs (Fig. 5D). The hyphae were mostly alive and well developed, as visualized by Dead/Life studies (Fig. 5A–C). Epidermal root‐cells appeared intact. The analysis of stained root cross‐sections showed that the S. lividans hyphae (Fig. 5E, left) were only found outside roots (Fig. 5E right).
Affiliation: FB Biology/Chemistry, Applied Genetics of Microorganisms, University of Osnabrück, Barbarastr. 13, 49069 Osnabrück, Germany.