Wounding induces resistance to pathogens with different lifestyles in tomato: role of ethylene in cross-protection

Authors

  • DORIANA FRANCIA,

    Corresponding author
    1. University of Turin, Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali (DiVaPRA) – Plant Pathology, via L. da Vinci, 44-10095 Grugliasco (TO), Italy and
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  • DANIELE DEMARIA,

    1. University of Turin, Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali (DiVaPRA) – Plant Pathology, via L. da Vinci, 44-10095 Grugliasco (TO), Italy and
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    • *

      Present address: C.Re.S.O, via Falicetto 10, I-12030 Manta (CN), Italy

    • These authors contributed equally to the paper.

  • ORNELLA CALDERINI,

    1. Consiglio Nazionale delle Ricerche – Instituto di Genetica Vegetale (CNR-IGV), via Madonna Alta, 130-6128 Perugia, Italy
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    • These authors contributed equally to the paper.

  • LUCIA FERRARIS,

    1. University of Turin, Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali (DiVaPRA) – Plant Pathology, via L. da Vinci, 44-10095 Grugliasco (TO), Italy and
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  • DANILA VALENTINO,

    1. University of Turin, Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali (DiVaPRA) – Plant Pathology, via L. da Vinci, 44-10095 Grugliasco (TO), Italy and
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  • SERGIO ARCIONI,

    1. Consiglio Nazionale delle Ricerche – Instituto di Genetica Vegetale (CNR-IGV), via Madonna Alta, 130-6128 Perugia, Italy
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  • GIACOMO TAMIETTI,

    1. University of Turin, Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali (DiVaPRA) – Plant Pathology, via L. da Vinci, 44-10095 Grugliasco (TO), Italy and
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  • FRANCESCA CARDINALE

    1. University of Turin, Dipartimento di Valorizzazione e Protezione delle Risorse Agroforestali (DiVaPRA) – Plant Pathology, via L. da Vinci, 44-10095 Grugliasco (TO), Italy and
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F. Cardinale. Fax: +39 011 2368875; e-mail: francesca.cardinale@unito.it

ABSTRACT

Many reports point to the existence of a network of regulatory signalling occurring in plants during the interaction with micro-organisms (biotic stress) and abiotic stresses such as wounding. However, the focus is on shared intermediates/components and/or common molecular outputs in differently triggered signalling pathways, and not on the degree and modes of effective influence between abiotic and biotic stresses nor the range of true plant–pathogen interactions open to such influence. We report on local and systemic wound-induced protection in tomato (Solanum lycopersicum L.) to four pathogens with a range of lifestyles (Botrytis cinerea, Fusarium oxysporum f.sp. lycopersici, Phytophthora capsici and Pseudomonas syringae pv. tomato). The role of ethylene (ET) in the phenomenon and in the induction by wounding of several markers of defense was investigated by using the never-ripe tomato mutant plants impaired in ET perception. We showed that PINIIb, PR1b, PR5, PR7 and peroxidase (POD) are influenced locally and/or systemically by wounding and, with the exception of POD activity, by ET perception. We also demonstrated that ET, although not essential, is positively (B. cinerea, P. capsici) or negatively (F. oxysporum, P. syringae pv. tomato) involved not only in basal but also in wound-induced resistance to each pathogen.

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