Transformation of the host-selective toxin destruxin B by wild crucifers: probing a detoxification pathway |
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Authors: | Pedras M S C Montaut S Zaharia I L Gai Y Ward D E |
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Affiliation: | Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, Canada S7N 5C9. soledade.pedras@usask.ca |
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Abstract: | The destruxin B detoxification pathway present in Sinapis alba is also present in three unrelated species, Camelina sativa, Capsella bursa-pastoris, and Eruca sativa, suggesting a conservation of this pathway across crucifers. The chemical structure of a destruxin B metabolite, (6'-O-malonyl)hydroxydestruxin B beta-D-glucopyranoside, was also establised. Considering that Camelina sativa and Capsella bursa-pastoris detoxify destruxin B and produce the phytoalexins camalexins, these wild crucifers appear to represent unique and perhaps useful sources of blackleg resistance in strategic plant breeding. |
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Keywords: | Alternaria brassicae Brassica species Destruxin B Hydroxydestruxin B Camalexin Crucifer Camelina sativa Capsella bursa-pastoris Eruca sativa |
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