The relationship between ethylene- and oxidative-related markers at harvest with the susceptibility of pears to develop superficial scald
Autor/a
Lindo-García, Violeta
Giné-Bordonaba, Jordi
Leclerc, Chloé
Ubach, Dolors
Fecha de publicación
2020-01-28ISSN
0925-5214
Resumen
To better understand the specific biochemical pathways involved in superficial scald susceptibility, changes in ethylene biosynthesis, antioxidant, oxidative related processes and sugar metabolism were investigated for two scald sensitive pear cultivars (‘Blanquilla’ and ‘Flor d’Hivern’) with distinct postharvest ripening patterns at different harvest dates. Both cultivars developed symptoms of scald after 4 months of storage at -0.5 °C, but the biochemical basis underlying the fruit susceptibility were different. In the summer pear ‘Blanquilla’, capable of ripening even on the tree, scald susceptibility was higher in fruit of advanced maturity and was associated with the action of ethylene on triggering the expression of PcAFS1 gene. In this cultivar, the levels of ACC, ACS enzyme activity and PcAFS1 at harvest were strongly correlated to scald incidence. In contrast, in the winter pear, ‘Flor d’Hivern’, with little or no ethylene-production capacity even after cold storage, scald symptoms were already visible when fruit were removed from cold storage, regardless of the fruit maturity. In this pear cultivar, scald symptoms were not dependent on ethylene, but rather associated with higher lipoxygenase (LOX) activity at harvest, an enzyme often associated with responses to chilling injury, and lower content of sorbitol, a compound that may act as cryoprotectant preventing cell damage during cold storage.
Tipo de documento
Artículo
Versión del documento
Versión aceptada
Lengua
English
Materias (CDU)
63 - Agricultura. Silvicultura. Zootecnia. Caza. Pesca
Páginas
42
Publicado por
Elsevier
Publicado en
Postharvest Biology and Technology
Citación
Lindo-García, Violeta, Jordi Giné-Bordonaba, Chloé Leclerc, Dolors Ubach, and Christian Larrigaudière. 2020. "The Relationship Between Ethylene- And Oxidative-Related Markers At Harvest With The Susceptibility Of Pears To Develop Superficial Scald". Postharvest Biology And Technology 163: 111135. doi:10.1016/j.postharvbio.2020.111135.
Número del acuerdo de la subvención
MINECO/Programa Estatal de I+D+I orientada a los retos de la sociedad/AGL2017-87923-R/CARACTERIZACION VARIETAL DE LA REGULACION BIOQUIMICA DEL ESCALDADO SUPERFICIAL EN PERA/
Program
Postcollita
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