Improving the quality of ‘Keitt’ Mango using pre-harvest calcium lactate treatment and post-harvest applications of kojic and ascorbic acids

Khedr, Emad

doi:10.1080/14620316.2022.2058427

Cited by 13 publications

(8 citation statements)

References 76 publications

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“…Mango is a typical respiratory transition type of fruit, ethylene in the postharvest storage and shelf during a large number of synthetic releases is an important hormone to promote fruit maturity and aging, inhibit the production of endogenous ethylene in the fruit, to slow down the aging of mango has great significance ( Khedr, 2022 ). ACS and ACO are two key rate-limiting enzymes for ethylene synthesis.…”

Section: Discussionmentioning

confidence: 99%

Effect of EVA film and chitosan coating on quality and physicochemical characteristics of mango fruit during postharvest storage

Pang,

Huang,

Xiao

et al. 2024

Food Chemistry: X

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Section: Discussionmentioning

confidence: 99%

Effect of EVA film and chitosan coating on quality and physicochemical characteristics of mango fruit during postharvest storage

Pang,

Huang,

Xiao

et al. 2024

Food Chemistry: X

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“…To determine the ascorbic acid content, a titration method was utilized, as described by Khedr [ 26 ]. The analysis involved titrating the fruit extract against a dye solution containing 2,6-dichlorophenol-indophenol.…”

Section: Methodsmentioning

confidence: 99%

Enhancing productivity, modifying biochemical parameters, and regulating the phenylpropanoid pathway in 'Le-Conte' pears through optimal protocatechuic acid treatments

Khedr,

Khedr

2024

BMC Plant Biol

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Background This study aimed to investigate the impact of protocatechuic acid (PRC) treatments on the productivity and fruit quality of 'Le-Conte' pears, with a specific focus on productivity, stone cells content, and antioxidant activity. The research spanned over three consecutive cultivating seasons, with the first season serving as a preliminary study to determine the optimal PRC concentrations and the most effective number of spray applications. During the initial season, response surface methodology (RSM) was employed to optimize PRC concentration and application frequency. PRC was evaluated at concentrations ranging from 50 to 400 ppm, with treatment frequencies of either once or twice. Considering the optimal conditions obtained from RSM results, PRC treatments at 200 ppm and 300 ppm were applied twice, and their respective effects were studied in comparison to the control in the following seasons. Results RSM results indicated that PRC at 200 and 300 ppm, applied twice, once during full bloom and again three weeks later, yielded the most significant effects. Subsequent studies revealed that PRC treatments had a substantial impact on various aspects of fruit production and quality. Applying 300 ppm PRC once during full bloom and again three weeks later resulted in higher fruit set percentages, lower fruit abscission, and enhanced fruit yield compared to untreated trees. Additionally, the 200 ppm PRC treatment maintained physicochemical characteristics such as fruit color, increased total soluble solids (TSS), and total sugar, and maintained higher ascorbic acid content and antioxidant capacity in the fruits while reducing stone cells content and lignin. Notably, enzyme activities related to phenylpropanoid metabolism and stone cells, including phenylalanine ammonia-lyase (PAL), cinnamate-4-hydroxylase (C4H), 4-Coumarate-CoA Ligase (4CL), cinnamyl alcohol dehydrogenase (CAD), and cinnamoyl-CoA reductase (CCR), as well as peroxidase, polyphenol oxidase, and laccase, were significantly regulated by PRC treatments. Conclusion Overall, this study suggests that PRC treatments are suitable for enhancing pear yield and quality, with PRC at 200 ppm being the more recommended option over 300 ppm. This approach serves as an effective strategy for achieving a balance between enhancing the productivity and fruit quality of 'Le-Conte' pears.

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“…Keitt). The fruits were carefully selected based on size, firmness, and overall appearance, as outlined by Khedr [ 29 ]. The chosen mangoes had an average weight of 350–450 g and a firmness level of 69.89 ± 5.21 N. They were also free of any visible damage and had an even colouration on the peel.…”

Section: Methodsmentioning

confidence: 99%

Harnessing the metabolic modulatory and antioxidant power of 1-(3-Phenyl-Propyl) cyclopropane and melatonin in maintaining mango fruit quality and prolongation storage life

Khedr,

Abdel-Haleem

2023

BMC Plant Biol

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Background The aim of this study was to compare and investigate the effects of 1-(3-phenyl-propyl) cyclopropene (PPCP) and melatonin (MT) as anti-ethylene agents on postharvest senescence, quality, chilling tolerance, and antioxidant metabolism in the mango fruit cv. “Keitt”. The study involved exposing the fruit to 20 μL L− 1 PPCP or 200 μM MT, in addition to a control group of untreated fruit, before storing them at 5 ± 1 °C for 28 d. The findings revealed that the treatments with PPCP and MT were effective in reducing chilling injury and preserving fruit quality when compared to the control group. Results The use of 20 μL L− 1 PPCP was an effective treatment in terms of mitigating chilling injury and preserving fruit quality for 28 d. This was attributed to the decrease in metabolic activity, specifically the respiration rate and the production of ethylene, which led to the maintenance of fruit firmness and bioactive compounds, energy metabolism, and antioxidant activity, such as ascorbic acid, total flavonoids, trolox equivalent antioxidant capacity, dehydroascorbate reductase, glutathione reductase activity, ATP, and ATPase activity. The study also found that the MT treatment at 200 μM was effective in reducing chilling injury and weight loss and improving membrane stability. Additionally, it led to a decrease in malondialdehyde content and electrolyte leakage, and the maintenance of fruit quality in terms of firmness, peel and pulp colour values for mango peel and pulp total carotenoid content, as well as phenylalanine ammonia lyase and tyrosine ammonia lyase activity. These findings indicate that PPCP and MT have the potential to be efficient treatments in maintaining mango quality and minimizing post-harvest losses. Conclusion The utilisation of treatments with 20 μL L− 1 of PPCP or 200 μM MT was found to effectively preserve the postharvest quality parameters, in terms of bioactive compounds, energy metabolism, and antioxidant activity, of mangoes cv. “Keitt” that were stored at 5 ± 1 °C for 28 d.

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Improving the quality of ‘Keitt’ Mango using pre-harvest calcium lactate treatment and post-harvest applications of kojic and ascorbic acids

Cited by 13 publications

References 76 publications

Effect of EVA film and chitosan coating on quality and physicochemical characteristics of mango fruit during postharvest storage

Effect of EVA film and chitosan coating on quality and physicochemical characteristics of mango fruit during postharvest storage

Enhancing productivity, modifying biochemical parameters, and regulating the phenylpropanoid pathway in 'Le-Conte' pears through optimal protocatechuic acid treatments

Harnessing the metabolic modulatory and antioxidant power of 1-(3-Phenyl-Propyl) cyclopropane and melatonin in maintaining mango fruit quality and prolongation storage life

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