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BioControl

01.06.2010

Suppression of disease in tomato infected by Pythium ultimum with a biosurfactant produced by Pseudomonas koreensis

verfasst von: M. Hultberg, T. Alsberg, S. Khalil, B. Alsanius

Erschienen in: BioControl | Ausgabe 3/2010

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Abstract

The use of biosurfactants is a promising alternative in biological control of zoospore-producing oomycetes, which are a major plant pathogen world-wide in a wide variety of crops. Oomycetes are of particular concern in closed hydroponic cultivation systems. The present study investigated the efficacy of a biosurfactant produced by Pseudomonas koreensis and added as a crude extract against the oomycete Pythium ultimum in hydroponic tomato cultivation. A significant reduction in disease was observed. Biosurfactant addition did not affect the indigenous root microflora when evaluated as sole carbon source utilisation. Chemical analysis, using electrospray hybrid mass spectrometry (ESI-MSMS), of the biosurfactant indicated it to be lokisin, a cyclic lipopeptide. These results confirm that biosurfactants are important in developing sustainable biological control strategies for oomycetes.

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Titel: Suppression of disease in tomato infected by Pythium ultimum with a biosurfactant produced by Pseudomonas koreensis
verfasst von: M. Hultberg
T. Alsberg
S. Khalil
B. Alsanius
Publikationsdatum: 01.06.2010
Verlag: Springer Netherlands
Erschienen in: BioControl / Ausgabe 3/2010
Print ISSN: 1386-6141
Elektronische ISSN: 1573-8248
DOI: https://doi.org/10.1007/s10526-009-9261-6