Biology and Postharvest Physiology of Date Fruit

Lobo, M.; Yahia, Elhadi M.; Kader, Adel A.

doi:10.1002/9781118292419.ch3

Cited by 20 publications

(32 citation statements)

References 30 publications

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“…Several methods of thinning are available for date palm trees. This practice was found to reduce the tannins content in some date cultivars [103]. Bunch bagging of the same cultivar with perforated blue polyethylene increased ascorbic acid level, decreased the total soluble tannins concentrations and peroxidase activity, and had no significant effect on total phenolic content [104].…”

Section: Variation Of Antioxidants Due To Pollination Bagging and Tmentioning

confidence: 99%

Antioxidants in Date Fruits and the Extent of the Variability of the Total Phenolic Content: Review and Analysis

Allaith¹

2019

Antioxidants

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The date fruit is economically important agricultural commodity, as well as a staple food in many countries in the Arab world, North Africa, and the Middle East. Recent interest in its nutritional, health, and therapeutic attributes is manifested by the rise in scientific publications. Dates of various cultivars are widely publicized and highly ranked as rich sources of natural antioxidant constituents and antioxidant activity. Such publicity, justified or otherwise, is sometimes accompanied by misconceptions and claims of cultivar-and/or country-wise superiority. This chapter examines these claims using a dataset generated from scientific studies published over the last three decades focusing on the total phenolic (TP) content of three stages of date maturity, with emphasis on the last stage, Tamer. The dataset contains TP values (mg GAE/100 g DM) from 18 countries and 243 cultivars and included 583 entries. It only examines variability of TP values. Statistical analysis indicates a great variability of TP content, both within a particular cultivar and among different cultivars. Claims of cultivar-and country-wise superiority and very high ranking of date antioxidant activity are not substantiated. The chapter also discusses various causes of high variability and calls for a collaboration work to address the issue.

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Section: Variation Of Antioxidants Due To Pollination Bagging and Tmentioning

confidence: 99%

Antioxidants in Date Fruits and the Extent of the Variability of the Total Phenolic Content: Review and Analysis

Allaith¹

2019

Antioxidants

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“…According to previous reports on other date cultivars, sucrose increased sharply between early and late maturity stage (Amoros et al, ). Also, it was reported that sugar content of 16 date varieties increases from kimri to khalal stage, and continues to increase from rutab to tamar stage (Al‐Shahib & Marshall, ; Lobo, Yahia, & Kader, ) and is dependent on the date variety (Ahmed & Ahmed, ). In addition, Abboudi and Thompson () reported that TSS content of Khlas and Khnaize cultivars (harvested at rutab stage of maturity) increases after 162 days of cold storage.…”

Section: Resultsmentioning

confidence: 99%

Assessment of physico‐chemical and sensory properties of two date ( Phoenix dactylifera L.) cultivars under commercial cold storage conditions

Noutfia¹,

Alem²,

Zegzouti³

2019

J Food Process Preserv

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Majhoul and Boufeggous date fruits, commonly grown in oases of Southern east Morocco, are widely consumed after post‐harvest season. Due to the perishability of date fruits, there is a need to extending their shelf life through cold storage. This study aimed to evaluate total soluble solids (TSS) content, moisture, acidity, color, firmness, as well as sensory attributes at 0, 1, 2, 3, and 5 months of cold storage for Majhoul and Boufeggous. Significant variations (p ≤ .05) in physico‐chemical attributes were observed during cold storage, but the two varieties did not behave similarly. The variation was more pronounced for Majhoul, especially for TSS, acidity, and Hunter‐color. Regarding sensory analysis, the stored samples were found to be less acceptable (p ≤ .05) with respect to mouthfeel, appearance, and color. Results obtained herein suggested that commercial cold storage (between +2°C and +4°C) should be seriously improved in order to retain overall quality of date fruits. Practical applications In the season of date (Phoenix dactylifera L.) harvest, production exceeds the market demand. Thus, most farmers store their production into cold stores in order to preserve intrinsic quality of the fruit until releasing into the market. This study will add current knowledge to the storage of date fruit and will provide an in depth insight on how cold storage can affect the acceptability of stored date fruits by consumers.

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“…Before consumption, the fruit should pass through the maturity stages such as Hababouk and Kimri. Then, the fruit passes through some chemical changes related to water and sugar content in order to be edible at three different maturity stages: Khalal, Rutab, and Tamr (Lobo et al, 2013). To reach the Khalal stage, slow paced processes such as weight gain of the fruit, increase in sucrose content, decrease in moisture content, and tannin precipitation occurs which finally makes the fruit edible (Bacha, 1987;FAO, 1993).…”

Section: Literature Reviewmentioning

confidence: 99%

Antioxidant Content and Capacity of Jordanian Date Palm Fruit at two Maturity Stages

2018

Aust. J. Basic & Appl. Sci.

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Biology and Postharvest Physiology of Date Fruit

Cited by 20 publications

References 30 publications

Antioxidants in Date Fruits and the Extent of the Variability of the Total Phenolic Content: Review and Analysis

Antioxidants in Date Fruits and the Extent of the Variability of the Total Phenolic Content: Review and Analysis

Assessment of physico‐chemical and sensory properties of two date ( Phoenix dactylifera L.) cultivars under commercial cold storage conditions

Antioxidant Content and Capacity of Jordanian Date Palm Fruit at two Maturity Stages

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