POTENTIAL USE OF ANTAGONISTIC BACTERIA IN COMBINATION WITH BRASSICA CARINATA AND HELIANTUS ANNUS MEALS

The development of the biodiesel industry for the production of bioenergy will produce an high quantity of meals, such as those from the biocide Brassica carinata and the no-biocide Heliantus annus. A recent work has shown that is possible to improve biological control by adding B. carinata meals to...

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Bibliographic Details
Published in:Journal of plant pathology 2009-12, Vol.91 (4), p.S4.95-S4.95
Main Authors: Zaccardelli, M, Villecco, D, Ronga, D
Format: Article
Language:English
Subjects:
Antibiosis
Biocides
Biofuels
Biological control
Brassica carinata
Diesel
Fungi
Glucosinolates
Helianthus
Host plants
Hydrolysis
isothiocyanate
Pathogens
Pseudomonas fluorescens
Trichoderma
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Summary:The development of the biodiesel industry for the production of bioenergy will produce an high quantity of meals, such as those from the biocide Brassica carinata and the no-biocide Heliantus annus. A recent work has shown that is possible to improve biological control by adding B. carinata meals to a Trichoderma strain no-sensitive to glucosinolates. To investigate if it is possible to improve the biological control of soil-borne pathogens, 22 bacterial strains, showing PGPR/ISR and/or antibiosis activities, were tested for their ability to grow on meals of the two biodiesel species. All the strains were able to grow on agar-plates or in liquid medium containing only sterilized meals of 23. carinata or sunflower. In vitro tests were performed with activated B. carinata meals, that delivered isothiocyanates by hydroloysis of the glucosinolates, contained in the meals. Results showed that B. carinata meals were able to partially inhibit the growth of all the strains within 24 h, except for two PGPR/ISR strains of Pseudomonas fluorescens and P. putida, that were totally insensitive to isothiocyanates. After 48 h all strains grew. Biological control of different soil-borne pathogen/host plant systems are in progress using antagonistic bacteria insensitive or slowly sensitive to B. carinata meals. The combination of this biocide meal with the antagonistic bacteria reduces the risk of the growth of phytopathogenic soil-borne fungi on B. carinata meal, after hydrolysis of all glucosinolates.
ISSN:1125-4653