Infection capacities in orange-pathogen relationship: Compatible (Penicillium digitatum) and incompatible (Penicillium expansum) interactions

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dc.contributor.authorVilanova, Laura
dc.contributor.authorViñas Almenar, Inmaculada
dc.contributor.authorTorres Sanchis, Rosario
dc.contributor.authorUsall i Rodié, Josep
dc.contributor.authorJauset Berrocal, Ana Maria
dc.contributor.authorTeixidó i Espasa, Neus
dc.date.accessioned2015-07-14T12:02:20Z
dc.date.embargoEndDate2025-01-01
dc.date.issued2012
dc.date.updated2015-07-14T12:02:21Z
dc.description.abstractPenicillium digitatum and Penicillium expansum are the most devastating pathogens of citrus and pome fruits, respectively. Whereas P. digitatum is a very specific pathogen that only infects Citrus fruits, P. expansum has a broader host range but has not been reported to be infectious in Citrus. To determine the responses of fruits and the infection capacities of both moulds, two varieties of oranges at different maturity stages, different inoculum concentrations and two different storage temperatures were studied. In compatible interactions, no significant differences in rot dynamics among harvests were found with a 107 conidia mL−1 inoculum concentration at both temperatures tested (20 °C and 4 °C). However, at other inoculum concentrations, significant differences in rot dynamics were found, especially in immature fruits. Incompatible interactions showed that P. expansum could infect oranges at commercial maturity in both tested varieties. Decay incidence and severity were higher at 4 °C than at 20 °C. In addition to infection capacity studies, histochemical tests were performed to detect wound-healing compounds for both pathogens. A positive reaction for lignin was detected for both pathogens in immature oranges over a short period (48 h). In all cases, no reactions were found in control samples. Our results indicate that pathogen concentration, host maturity and storage temperature can play important roles in the defence mechanisms of fruit. Furthermore, to our knowledge, this is the first work that demonstrates that P. expansum can infect oranges under favourable conditions.
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1016/j.fm.2011.08.016
dc.identifier.idgrec022614
dc.identifier.issn0740-0020
dc.identifier.urihttp://hdl.handle.net/10459.1/48590
dc.language.isoeng
dc.publisherElsevier
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1016/j.fm.2011.08.016
dc.relation.ispartofFood Microbiology, 2012, vol. 29, núm. 1, p. 56-66
dc.rights(c) Elsevier, 2012
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectBlue mould
dc.subjectGreen mould
dc.subjectMaturity stage
dc.subjectDisease resistance
dc.subjectLignin
dc.titleInfection capacities in orange-pathogen relationship: Compatible (Penicillium digitatum) and incompatible (Penicillium expansum) interactions
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
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