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Wound response in orange as a resistance mechanism against Penicillium digitatum (pathogen) and P. expansum (non-host pathogen)

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Fecha de publicación
2013
Autor/a
Vilanova, Laura
Torres Sanchis, Rosario
Viñas Almenar, Inmaculada
González-Candelas, Luis
Usall i Rodié, Josep
Fiori, S.
Solsona Aixalà, Cristina
Teixidó i Espasa, Neus
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Vilanova, Laura; Torres Sanchis, Rosario; Viñas Almenar, Inmaculada; González-Candelas, Luis; Usall i Rodié, Josep; Fiori, S.; ... Teixidó i Espasa, Neus. (2013) . Wound response in orange as a resistance mechanism against Penicillium digitatum (pathogen) and P. expansum (non-host pathogen). Postharvest Biology and Technology, 2013, vol. 78, p. 113-122. https://doi.org/10.1016/j.postharvbio.2012.12.013.
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Resumen
Penicillium digitatum is the most devastating postharvest pathogen of citrus. In addition, Penicillium expansum is the main pathogen of pome fruit, although recent studies have demonstrated its ability to infect oranges under some conditions. In this study, we evaluated wound response in"Valencia" oranges harvested at three different maturity stages and the effect of wound response on the establishment of both pathogens when fruit were stored at two different temperatures (20 and 4 °C). The effect of wounding and pathogen inoculation on lignin content, was also quantified. Lastly, the expression of several phenylpropanoid pathway-related genes was also analyzed by semi-quantitative RT-PCR. Results indicated that, in general, P. digitatum exhibited lower decay incidence and severity as time between wounding and inoculation increased. Decay incidence and severity were higher in fruit from the over-mature harvest than in fruit from immature and commercial harvests. P. expansum was able to infect fruit at 20 °C but lesions were small compared to lesion size of fruit stored at 4 °C. Lignin content in wounded fruit (control) and in samples wounded and inoculated with P. expansum was highest in fruit from the immature harvest at 7 d post-wounding and inoculation. Wounded fruit had higher expression of pal1, comt1 and pox1 genes at 48 h than at 24 h. However, samples inoculated with P. digitatum showed lower expression at 48 h than at 24 h. Our results indicated that maturity and storage temperature play an important role in orange wound response.
URI
http://hdl.handle.net/10459.1/48595
DOI
https://doi.org/10.1016/j.postharvbio.2012.12.013
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Postharvest Biology and Technology, 2013, vol. 78, p. 113-122
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  • Effect of fruit maturity stage of orange on the wound response to Penicillium digitatum (pathogen) and P. expansum (non-host pathogen) 

    Vilanova, Laura; Torres Sanchis, Rosario; Usall i Rodié, Josep; Teixidó i Espasa, Neus; González-Candelas, Luis; Viñas Almenar, Inmaculada; Fiori, S. (International Society for Horticultural Science, 2014)
    Penicillium digitatum and P. expansum are postharvest necrotrophic fungi that require wounds to infect the fruit. Therefore, injuries caused during harvesting and postharvest handling provide an optimal locus for infection. ...
  • Increasing maturity reduces wound response and lignification processes against Penicillium expansum (pathogen) and P. digitatum (non-host pathogen) infection in apples 

    Vilanova, Laura; Viñas Almenar, Inmaculada; Torres Sanchis, Rosario; Usall i Rodié, Josep; Burón Moles, Gemma; Teixidó i Espasa, Neus (Elsevier, 2014)
    Penicillium expansum is the main postharvest pathogen of pome fruit and is a necrotrophic fungus that requires wounds to infect the fruit. Therefore, injuries caused during harvest and postharvest handling provide an optimal ...
  • Infection capacities in orange-pathogen relationship: Compatible (Penicillium digitatum) and incompatible (Penicillium expansum) interactions 

    Vilanova, Laura; Viñas Almenar, Inmaculada; Torres Sanchis, Rosario; Usall i Rodié, Josep; Jauset Berrocal, Ana Maria; Teixidó i Espasa, Neus (Elsevier, 2012)
    Penicillium 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 ...

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