Show simple item record

dc.contributor.authorVilanova, Laura
dc.contributor.authorTeixidó i Espasa, Neus
dc.contributor.authorTorres Sanchis, Rosario
dc.contributor.authorUsall i Rodié, Josep
dc.contributor.authorViñas Almenar, Inmaculada
dc.date.accessioned2015-07-15T10:16:40Z
dc.date.issued2012
dc.identifier.issn0168-1605
dc.identifier.urihttp://hdl.handle.net/10459.1/48594
dc.description.abstractFruit ripening is a complex process that involves a variety of biochemical changes and is also associated with increased susceptibility to pathogens. The present study determined the effects of fruit maturity and storage conditions on the infection capacity of a host (P. expansum) and non-host (P. digitatum) pathogen on apple. A range of inoculum concentrations and two different storage temperatures were utilized. Exposure to P. expansum at 20 °C resulted in significant differences in rot dynamics in apples collected at the earliest harvest date compared to all later harvest dates and inoculum concentrations assayed. Greater differences in infection capacity between harvests were obtained when fruit was stored at low temperature (0 °C). In contrast, P. digitatum was able to infect apples only under specific conditions and disease symptoms were limited to the initial wound inoculation site. When apples were resistant to P. digitatum, a visible browning reaction around the infection site was observed. Histochemical analyses of tissues surrounding the wound site were conducted. A positive reaction for lignin was observed in immature apples as early as 1 day after inoculation with either pathogen. Experiments conducted with the non-host pathogen indicated that lignification was an essential component of resistance in apples harvested prior to maturity or at commercial maturity. Apples harvested at an over‐mature stage and inoculated with P. digitatum did not show evidence of staining for lignin until 7 days post-inoculation. Control samples only showed positive reaction in immature harvest. Results demonstrated that the maturity stage of fruit is an important factor in apple resistance to both P. expansum and P. digitatum and that lignin accumulation seems to play an important role when resistance is observed. Moreover, this is the first report demonstrating that P. digitatum, a non-host pathogen, has a limited capacity to infect apples.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherElsevier
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1016/j.ijfoodmicro.2012.06.005
dc.relation.ispartofInternational Journal of Food Microbiology, 2012, vol. 157, num. 3, p. 360-367
dc.rights(c) Elsevier, 2012
dc.subjectBlue mould
dc.subjectGreen mould
dc.subjectMaturity stage
dc.subjectDefence
dc.subjectLignin
dc.titleThe infection capacity of P. expansum and P. digitatum on apples and histochemical analysis of host response
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2015-07-15T10:16:40Z
dc.identifier.idgrec022615
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccess
dc.identifier.doihttps://doi.org/10.1016/j.ijfoodmicro.2012.06.005
dc.date.embargoEndDate2025-01-01


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record