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Activity of Meadowfoam (Limnanthes alba) Seed Meal Glucolimnanthin Degradation Products against Soilborne Pathogens

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dc.creator Zasada, Inga A.
dc.creator Weiland, Jerry E.
dc.creator Reed, Ralph L.
dc.creator Stevens, Jan F.
dc.date.accessioned 2012-11-07T23:02:42Z
dc.date.available 2012-11-07T23:02:42Z
dc.date.issued 2012-01-11
dc.identifier.citation Zasada, I. A., Weiland, J. E., Reed, R. L., & Stevens, J. F. (2012). Activity of meadowfoam (limnanthes alba) seed meal glucolimnanthin degradation products against soilborne pathogens. Journal of Agricultural and Food Chemistry, 60(1), 339-345. doi: 10.1021/jf203913p en_US
dc.identifier.uri http://hdl.handle.net/1957/34970
dc.description This is the publisher’s final pdf. The published article is copyrighted by American Chemical Society and can be found at: www.acs.org/. en_US
dc.description.abstract Meadowfoam (Limnanthes alba L.) is a herbaceous winter spring annual grown as a commercial oilseed crop. The meal remaining after oil extraction from the seed contains up to 4% of the glucosinolate glucolimnanthin. Degradation of glucolimnanthin yields toxic breakdown products, and therefore the meal may have potential in the management of soilborne pathogens. To maximize the pest-suppressive potential of meadowfoam seed meal, it would be beneficial to know the toxicity of individual glucolimnanthin degradation products against specific soilborne pathogens. Meloidogyne hapla second-stage juveniles (J2) and Pythium irregulare and Verticillium dahliae mycelia] cultures were exposed to glucolimnanthin as well as its degradation products. Glucolimnanthin and its degradation product, 2-(3-methoxyphenyl)acetamide, were not toxic to any of the soilborne pathogens at concentrations up to 1.0 mg/mL. Two other degradation products, 2-(3-methoxymethyl)ethanethioamide and 3-methoxyphenylacetonitrile, were toxic to M. hapla and P. irregulare but not V. dahliae. The predominant enzyme degradation product, 3-methoxybenzyl isothiocyanate, was the most toxic compound against all of the soilborne pathogens, with M. hapla being the most sensitive with EC(50) values (0.0025 +/- 0.0001 to 0.0027 +/- 0.0001 mg/mL) 20-40 times lower than estimated EC(50) mortality values generated for P. irregulare and V. dahliae (0.05 and 0.1 mg/mL, respectively). The potential exists to manipulate meadowfoam seed meal to promote the production of specific degradation products. The conversion of glucolimnanthin into its corresponding isothiocyanate should optimize the biopesticidal properties of meadowfoam seed meal against M. hapla, P. irregulare, and V. dahliae. en_US
dc.language.iso en_US en_US
dc.publisher American Chemical Society en_US
dc.relation.ispartofseries Journal of Agricultural and Food Chemistry en_US
dc.relation.ispartofseries Vol. 60 no. 1 en_US
dc.subject Nematicidal effect en_US
dc.subject Fungicidal effect en_US
dc.subject Lethal concentration en_US
dc.subject Seed meal en_US
dc.title Activity of Meadowfoam (Limnanthes alba) Seed Meal Glucolimnanthin Degradation Products against Soilborne Pathogens en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1021/jf203913p

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