Suppression of disease in tomato infected by Pythium ultimum with a biosurfactant produced by Pseudomonas koreensis
2010 (English)In: BioControl (Dordrecht), ISSN 1386-6141, E-ISSN 1573-8248, Vol. 55, no 3, 435-444 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2010. Vol. 55, no 3, 435-444 p.
Biological control, Hydroponics, Lokisin, Oomycetes, Pseudomonas koreensis, Pythium ultimum
IdentifiersURN: urn:nbn:se:su:diva-50666DOI: 10.1007/s10526-009-9261-6ISI: 000277955400012OAI: oai:DiVA.org:su-50666DiVA: diva2:383160
authorCount :42011-01-042010-12-302011-01-04Bibliographically approved