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Pre-harvest climate and post-harvest acclimation to cold prevent from superficial scald development in Granny smith apples

Abstract : Superficial scald is one of the most serious postharvest physiological disorders that may affect apples after a prolonged cold storage period. As little is known about its early determinism, we investigated the impact of pre- and post-harvest climatic variations on its incidence on a susceptible apple cultivar. Fruit batches with contrasted phenotype for superficial scald incidence were identified among several years of “Granny Smith” fruit production. The “low scald” year pre-harvest climate was characterised by a warm period followed by a sudden decrease in temperature, playing the part of an in vivo acclimation to cold storage. In agreement, a transcriptomic analysis at harvest revealed that many abiotic stress responsive genes were differentially expressed in fruit peel. In particular 48 Heat Shock Proteins (HSPs) and 5 Heat Shock transcription Factors (HSFs) were strongly induced at harvest when scald incidence was low after 4 months of cold storage. For “high scald” year, a post-harvest cold acclimation of 1 week was efficient to reduce scald incidence. Expression profiles of stress related genes were affected by the acclimation treatment and indicate fruit physiological adaptations to cold storage. The identified stress-responsive genes and in particular HSPs could be useful indicators of the fruit physiological status in order to predict the risk of scald occurrence as early as harvest.
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https://hal.inrae.fr/hal-03098595
Contributor : Olivier Dupre <>
Submitted on : Tuesday, January 5, 2021 - 6:16:31 PM
Last modification on : Friday, February 5, 2021 - 3:38:54 AM

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  • HAL Id : hal-03098595, version 1

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Mathilde Orsel-Baldwin, Matthieu Marc, Maryline Cournol, Sylvain Hanteville, Anne-Sophie Poisson, et al.. Pre-harvest climate and post-harvest acclimation to cold prevent from superficial scald development in Granny smith apples. 10th ROSACEAE GENOMICS CONFERENCE (virtual 2020), Dec 2020, Barcelone, Spain. pp.Abstract C0183. ⟨hal-03098595⟩

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