Effect of Preharvest Spray of Ca and K on Quality, Peel Pitting and Peroxidases Activity of 'Fortune' Mandarin Fruit in Low Temperature Storage

El-hilali, F.; Ait-Oubahou, A.; Remah, A.; Akhayat, O.

doi:10.17660/actahortic.2004.632.40

Cited by 6 publications

(4 citation statements)

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“…It is reported that at the late stages of citrus fruit development, soluble solids accumulate in the juice sacs (Coggins 1981). Similar increases in TSS, VC and sugars contents were reported by EL-Hilali et al (2004) on Fortune mandarin, El-Otmani et al (2004) on Clementine mandarin, and Saleem et al (2008) on Blood Red orange. The decrease in carotenoids by spraying PUT and GA3 might be attributed to that the same substances led to a decrease in fruit color as obtained for the first harvest date in this study.…”

Section: Fruit Chemical Parameterssupporting

confidence: 75%

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Effect of Putrescine, GA3, 2, 4-D, and Calcium on Extending Harvest Season of Navel Orange

2010

Alexandria Science Exchange Journal: An International Quarterly

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The present study was conducted in 2007/2008 and 2008/2009 seasons in order to extend harvest season and maintain fruit quality for better marketability of Washington navel oranges growing in clay soil by preharvest foliar sprays (at color break stage) with GA3, 2,4-D, putrescine and calcium either alone or in combinations. Trees were harvested at mid-February (late in the season). All sprayed substances delayed fruit softening, peel ageing and fruit color break and decreased creasing and preharvest fruit drop. Also, fruit TSS, sugars and V.C. contents were increased. The treatments had positive influence on extending harvest season without any deterioration in fruit characteristics. In general, spraying the different substances in combinations gave better results, especially for putrescine and 2,4-D.

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Section: Fruit Chemical Parameterssupporting

confidence: 75%

“…They also improve fruit quality by reducing mechanical damage and increasing fruit firmness (Valero et al 1998a andb, Perez-Vicente et al 2002). In addition, many researches focused on extending citrus fruit life by pre-or postharvest treatments with calcium (Valero et al 1998b, El-Hilali et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Effect of Putrescine, GA3, 2, 4-D, and Calcium on Extending Harvest Season of Navel Orange

2010

Alexandria Science Exchange Journal: An International Quarterly

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“…At 4°C, POD activity was found to increase rapidly during the storage period. The importance of chilling disorders in the fruit peel was closely connected with the rise in POD activity (El‐Hilali et al ., 2004). POD activity was also found to increase during open air ripening storage (Othman, 2012) and during storage of Fuerte cv avocado fruit after thermal treatment (Yassin et al ., 2017) and Vanini et al .…”

Section: Resultsmentioning

confidence: 99%

Metabolic profiling and biochemical analysis of stored Hass avocado fruit by GC‐MS and UHPLC‐UV‐VIS revealed oxidative stress as the main driver of ‘blackspot’ physiological disorder

Uarrota

Hernández

Ponce

et al. 2022

Int J of Food Sci Tech

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Summary The goal of this study was to use GC‐MS and UHPLC‐UV‐VIS‐based metabolomic tools combined with chemometric analysis to discriminate between fruit with blackspot physiological disorder independently of storage condition (regular air or controlled atmosphere) and without blackspot (hereafter referred to as ‘Control’). The study looked at polar metabolites, enzymes, fatty acids and oxidative stress markers. Fruit with high levels of lenticel damage are more likely to develop blackspot, which appears to be exacerbated by H2O2 and peroxidation of lipids. Lower catalase (CAT), peroxidase (POD), polyphenol oxidase (PPO), superoxide dismutase (SOD) and phenylalanine‐ammonia lyase (PAL) activities together with lower levels of polyphenols (syringic acid, epigallocatechin, quercetin and vanillic) and fatty acids (linolenic, linoleic and palmitic acid), as well as ß‐sitosterol, methyl‐3‐hydroxybutyrate, glyceric acid, hydroxyl butanoic acid, L‐threonic acid, hydroxyl glutaric acid and xylose contributed to a higher prevalence of blackspot disorder in stored Hass avocados, which was accompanied by upregulation of soluble proteins. Finally, chemometric analysis revealed a positive relationship between blackspot disorder with gluconic, palmitoleic, galactose oxime, glyceric, hydroxyglutaric, MDA, syringic and oleic acid, as well as a negative relationship with catechin, epigallocatechin, SOD, CAT and tagatose. The study concluded that oxidative stress is the main driver of ‘Blackspot’ physiological disorder.

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“…Boron sprays strongly suppressed browning disorders in 'Conference' pears throughout 4 months of cold storage under controlled atmosphere, apparently arising from reduced membrane leakage and increased content of ascorbic acid, the antioxidant properties of which may protect fruit tissues from these disorders [58]. In mandarin, preharvest sprays with potassium led to higher rind firmness and juice acidity, while other eating quality attributes such as juice content, SSC or SSC/TA ratios were unaffected [59], which disagrees with research by El Otmani et al [48], maybe due to the different potassium concentration used. However, peroxidase activity was lower in treated fruit during storage at 4 o C, suggesting that treatment induced some tolerance to chilling injury.…”

Section: Miscellaneous Spraysmentioning

confidence: 99%

Preharvest sprays and their effects on the postharvest quality of fruit

Lara¹

2013

Stewart Postharvest Review

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Purpose of review: This paper reviews studies on the effects of preharvest spray treatments on the postharvest quality and storage potential of fruits, with the objective of summarising the main effects in each case and identifying major topics requiring further research. Findings: The literature survey shows that most of the studies on preharvest sprays have considered either calcium or growth regulator treatments. Calcium applications are generally reported to delay ripening, decrease postharvest rots and alterations, and extend the keeping period, but their effects are partially dependent on the calcium source and formulation used, and phytotoxicity has also been occasionally observed. Preharvest sprays with growth regulators such as aminoethoxyvinylglycine, gibberellins or polyamines have also been studied and have shown promising potential for delaying ripening and improving storage potential or particular quality traits. Directions for future research: Although some common effects have been identified on fruit physiology for a particular treatment, a certain degree of variability across fruit types or cultivars has been observed in all cases. The suitability and the particular conditions of each treatment should be assessed and adjusted for each fruit type. In addition, because fruit metabolism is complex and strictly regulated, improved keeping potential may be contradicted by detrimental effects on eating quality, meaning that treatment effects should be evaluated as a whole. A third aspect worthy of more intense research efforts involves effects on key quality attributes such as aroma or bioactive compound contents, or on other traits relevant for quality preservation such as fruit cuticles.

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Effect of Preharvest Spray of Ca and K on Quality, Peel Pitting and Peroxidases Activity of 'Fortune' Mandarin Fruit in Low Temperature Storage

Cited by 6 publications

References 0 publications

Effect of Putrescine, GA3, 2, 4-D, and Calcium on Extending Harvest Season of Navel Orange

Effect of Putrescine, GA3, 2, 4-D, and Calcium on Extending Harvest Season of Navel Orange

Metabolic profiling and biochemical analysis of stored Hass avocado fruit by GC‐MS and UHPLC‐UV‐VIS revealed oxidative stress as the main driver of ‘blackspot’ physiological disorder

Preharvest sprays and their effects on the postharvest quality of fruit

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