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Methyl salicylate production in tomato affects biotic interactions (2010)

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Titel Methyl salicylate production in tomato affects biotic interactions
Gepubliceerd in Plant Journal, Vol. 62, No. 1, p.124-134. ISSN 09607412.
Auteur K. Ament; V. Krasikov; S. Allmann; M. Rep; F.L.W. Takken; R.C. Schuurink
Datum 2010
Taal Engels
Type Artikel
Samenvatting The role of methyl salicylate (MeSA) production was studied in indirect and direct defence responses of tomato (Solanum lycopersicum) to the spider mite Tetranychus urticae and the root-invading fungus Fusarium oxysporum f. sp. lycopersici, respectively. To this end, we silenced the tomato gene encoding salicylic acid methyl transferase (SAMT). Silencing of SAMT led to a major reduction in SAMT expression and MeSA emission upon herbivory by spider mites, without affecting the induced emission of other volatiles (terpenoids). The predatory mite Phytoseiulus persimilis, which preys on T. urticae, could not discriminate between infested and non-infested SAMT-silenced lines, as it could for wild-type tomato plants. Moreover, when given the choice between infested SAMT-silenced and infested wild-type plants, they preferred the latter. These findings are supportive of a major role for MeSA in this indirect defence response of tomato. SAMT-silenced tomato plants were less susceptible to a virulent strain of F. oxysporum f. sp. lycopersici, indicating that the direct defense responses in the roots are also affected in these plants. Our studies show that the conversion of SA to MeSA can affect both direct and indirect plant defence responses.
Publicatie http://dare.uva.nl/record/369075
OpenURL Zoek deze publicatie in (uw) bibliotheek
Persistent Identifier urn:nbn:nl:ui:29-369075
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Repository Universiteit van Amsterdam

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