Leaf glucosinolate profiles and their relationship to pest and disease resistance in oilseed rape |
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| Authors: | Richard Mithen |
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| Institution: | (1) Cambridge Laboratory, Institute of Plant Science Research, John Innes Centre, Colney, NR4 7UJ Norwich, UK |
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| Abstract: | Summary Glucosinolates are sulphur-containing glycosides which occur within vegetative and reproductive tissue of oilseed rape. Following tissue damage, glucosinolates undergo hydrolysis catalysed by the enzyme myrosinase to produce a complex array of products which include volatile isothiocyanates and several compounds with goitrogenic activity. Many of these products have been implicated in the interaction betweenBrassica and their pests and pathogens and some may have a role in defence mechanisms. Low glucosinolate (00) oilseed rape cultivars have been shown to possess similar concentrations of leaf glucosinolates as high glucosinolate (0) oilseed rape cultivars. Likewise, despite considerable speculation to the contrary, 00 cultivars have been shown not to be more susceptible to pests and pathogens than 0 cultivars. The potential to enhance pest and disease resistance of oilseed rape by manipulating the leaf glucosinolate profile without reducing seed quality is discussed. |
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| Keywords: | Brassica napus ssp oleifera disease resistance glucosinolates isothiocyanates oilseed rape |
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