Systemin Regulates Both Systemic and Volatile Signaling in Tomato Plants |
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Authors: | G Corrado R Sasso M Pasquariello L Iodice A Carretta P Cascone L Ariati M C Digilio E Guerrieri R Rao |
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Affiliation: | (1) Dipartimento di Scienze del Suolo della Pianta e dell’Ambiente, Università degli Studi di Napoli “Federico II”, 80055 Portici, Naples, Italy;(2) Istituto per la Protezione delle Piante Consiglio Nazionale delle Ricerche, Via Università n. 133, 80055 Portici, Naples, Italy;(3) Dipartimento di Entomologia e Zoologia Agraria, Università degli Studi di Napoli “Federico II”, Via Università n. 100, 80055 Portici, Naples, Italy;(4) IDROCONS Srl, Strada Savonesa n. 9, PST, Rivalta Scrivia, Tortona, Alessandria, 15050, Italy;(5) Dipartimento di Medicina Interna, Sezione Farmacologia e Tossicologia Cellulare e Molecolare, Università degli Studi di Pavia, Piazza Botta n. 10, 27100 Pavia, Italy |
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Abstract: | The prevailing reaction of plants to pest attack is the activation of various defense mechanisms. In tomato, several studies
indicate that an 18 amino acid (aa) peptide, called systemin, is a primary signal for the systemic induction of direct resistance
against plant-chewing pests, and that the transgenic expression of the prosystemin gene (encoding the 200 aa systemin precursor) activates genes involved in the plant response to herbivores. By using a combination
of behavioral, chemical, and gene expression analyses, we report that systemin enhances the production of bioactive volatile
compounds, increases plant attractivity towards parasitiod wasps, and activates genes involved in volatile production. Our
data imply that systemin is involved in the systemic activation of indirect defense in tomato, and we conclude that a single
gene controls the systemic activation of coordinated and associated responses against pests.
G. Corrado and R. Sasso contributed equally to the work |
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Keywords: | Prosystemin Volatile Plant– insect interaction Gene expression Indirect defense |
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