Induction of postharvest resistance in melon using pulsed light as abiotic stressor

Sousa, Aline Ellen Duarte de; Lopes, Mônica Maria de Almeida; Moreira, Antônio Deives Renan; Macedo, José J.N.; Moura, Carlos Farley Herbster; Aragão, F. A. S. de; Zocolo, Guilherme Julião; Miranda, Maria Raquel Alcântara de; Silva, Ebenézer de Oliveira

doi:10.1016/j.scienta.2018.11.066

Cited by 20 publications

(17 citation statements)

References 47 publications

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“…Postharvest quality of ozone-treated fruits -Shelf life was estimated by assessing external appearance of fruits on a daily basis, following a decreasing scale of scores ranging from 5 to 0, according to Sousa et al (2019). Upon reaching score 2, fruits were discarded as they were considered unsuitable for commercialization (end of shelf life).…”

Section: Methodsmentioning

confidence: 99%

Ozone slows down anthracnose and increases shelf life of papaya fruits

Neto

Pinto

Ootani³

et al. 2019

Rev. Bras. Frutic.

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This study investigated the effect of ozone on papaya postharvest conservation, aiming at controlling anthracnose and increasing fruit shelf life. The experiment was conducted at the Laboratory of Product Technology, Federal University of Amazonas, Manaus-AM. Fruits were treated with 0; 0.6; 1.5 and 3.3 ppm ozone and commercial fungicide. They were then stored at room temperature (27 ± 2 °C and 65 ± 5% RH). Incidence, severity, number and size of anthracnose lesions were determined, as well as postharvest quality by assessing shelf life; accumulated and daily fresh mass loss (%), peel color, electrolyte leakage (%), soluble solids (%), titratable acidity (g 100 g-1), soluble solids / titratable acidity ratio, pH and vitamin C (mg 100 g-1). Ozone reduced anthracnose severity in the short (3.3 ppm) and long term (1.5 ppm), making it as effective as a commercial fungicide. Ozone increased shelf life by seven days and maintained the postharvest quality of papaya fruits. Thus, ozone becomes a potential technology for postharvest use as a safe alternative to the use of pesticides in reducing anthracnose and increasing shelf life of papaya fruits.

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Section: Methodsmentioning

confidence: 99%

Ozone slows down anthracnose and increases shelf life of papaya fruits

Neto

Pinto

Ootani³

et al. 2019

Rev. Bras. Frutic.

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“…The PL germicidal effect has been mainly attributed to the damage in microbial DNA induced by the UV-C portion of the light spectrum (photochemical effect), and/or to localized overheating of cells (photothermal effect) and/or to structural damage (photophysical effect) (Gómez-López et al, 2007;Romero-Bernal et al, 2019). In addition, both pulsed light and thermal treatment can activate defense responses on the fruit tissue at specific doses, which can lead to the induction of antifungal substances (e.g., phytoalexins), pathogenesis-related (PR) proteins such as chitinase and β-1,3 glucanase, and/ or the inhibition of the synthesis of cell wall hydrolyzing enzymes (Duarte de Sousa et al, 2019;Pan et al, 2004;Pongener et al, 2018;Urban et al, 2018). Due to the mild temperatures applied in this study, the reduction of the infection levels in TT-treated fruit would be mainly associated to the elicitation of the defense response mentioned above.…”

Section: Fungal Incidencementioning

confidence: 99%

“…It involves the use of very short (1µs-0.1 s) high intensity pulses of a broad spectrum range (200-1,100 nm) supplied by xenon lamps (Gómez-López et al, 2007). Both thermal and pulsed light treatments may involve two modes of action against microorganisms: one is the direct effect on target cells, and the other is related to defense responses triggered in the fruit matrix (Duarte de Sousa et al, 2019;Duarte-Molina et al, 2016;Pongener et al, 2018;Urban et al, 2018). Applied doses, cultivar, fruit physiological status at the time of treatment, and storage environment, condition the defense mechanisms in response to physical abiotic stresses (Urban et al, 2018).…”

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confidence: 99%

Efficacy of mild thermal and pulsed light treatments, individually applied or in combination, for maintaining postharvest quality of strawberry cv. Albion

Contigiani

Castro

Gómez

et al. 2020

J Food Process Preserv

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The effect of mild thermal (TT) and pulsed light (PL) treatments, individually applied or in combination, on fungal spoilage, mechanical properties, weight loss, and microstructure of strawberries (cv. Albion) stored at 5 °C was evaluated. TT (2.5 and 5.0 min in water at 46 ± 0.4 °C) was more effective than PL (fluence: 11.9 J/cm2) to reduce fungal decay. TT for 5 min delayed the onset of infection for 6 days and maintained the lowest percentage of infected fruit along storage, showing the best performance among the strategies evaluated. Combined treatments did not achieve greater fungal inhibition than individual TT. Non significant differences in weight loss among control and treated fruit were observed up to 8 days of storage. TT for 5 min and its combination with PL significantly enhanced firmness, stiffness, and resistance to deformation as compared to untreated fruit, in concordance with the reinforcement of cell walls. Practical applications This work aimed to compare the effect of mild thermal and pulsed light treatments, individually applied or in combination, on strawberries storage life. The evaluation of the impact of these technologies on selected quality parameters (fungal growth, weight loss, and mechanical properties) and their correlation with modifications at microstructure level, would contribute to the selection of postharvest strategies for prolonging the shelf life of strawberries.

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“…Moreover, the use of PL as a physical method can stimulate the production of phytochemicals in plant tissues to minimize the possible deleterious effects caused by radiation [15]. Thus, when fruit is subjected to abiotic stress, some metabolomics changes might be down-or upregulated in a variety of compounds related to fruit metabolism; this could even result in the production of new compounds linked to stress tolerance [16].…”

Section: Introductionmentioning

confidence: 99%

Effect of pulsed light on postharvest disease control-related metabolomic variation in melon (Cucumis melo) artificially inoculated with Fusarium pallidoroseum

et al. 2020

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Pulsed light, as a postharvest technology, is an alternative to traditional fungicides, and can be used on a wide variety of fruit and vegetables for sanitization or pathogen control. In addition to these applications, other effects also are detected in vegetal cells, including changes in metabolism and secondary metabolite production, which directly affect disease control response mechanisms. This study aimed to evaluate pulsed ultraviolet light in controlling postharvest rot, caused by Fusarium pallidoroseum in 'Spanish' melon, in natura, and its implications in disease control as a function of metabolomic variation to fungicidal or fungistatic effects. The dose of pulsed light (PL) that inhibited F. pallidoroseum growth in melons (Cucumis melo var. Spanish) was 9 KJ m-2. Ultra-performance liquid chromatography (UPLC) coupled to a quadrupole-time-of-flight (QTOF) mass analyzer identified 12 compounds based on tandem mass spectrometry (MS/MS) fragmentation patterns. Chemometric analysis by Principal Components Analysis (PCA) and Orthogonal Partial Least Squared Discriminant Analysis (OPLS-DA) and corresponding S-Plot were used to evaluate the changes in fruit metabolism. PL technology provided protection against postharvest disease in melons, directly inhibiting the growth of F. pallidoroseum through the upregulation of specific fruit biomarkers such as pipecolic acid (11), saponarin (7), and orientin (3), which acted as major markers for the defense system against pathogens. PL can thus be proposed as a postharvest technology to prevent chemical fungicides and may be applied to reduce the decay of melon quality during its export and storage.

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Induction of postharvest resistance in melon using pulsed light as abiotic stressor

Cited by 20 publications

References 47 publications

Ozone slows down anthracnose and increases shelf life of papaya fruits

Ozone slows down anthracnose and increases shelf life of papaya fruits

Efficacy of mild thermal and pulsed light treatments, individually applied or in combination, for maintaining postharvest quality of strawberry cv. Albion

Effect of pulsed light on postharvest disease control-related metabolomic variation in melon (Cucumis melo) artificially inoculated with Fusarium pallidoroseum

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