Temperature, electrolyte leakage, ascorbic acid content and sunscald in two cultivars of pepino,<i>Solanum muricatum</i>

Prohens, Jaime; Miró, R.; Rodríguez‐Burruezo, Adrián; Chiva, S.; Verdú, G.; Nuez, F.

doi:10.1080/14620316.2004.11511776

Cited by 18 publications

(14 citation statements)

References 15 publications

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“…In contrast, under excessive solar radiation or UV-B radiation of only a few hours, photo-oxidative damage or photoinhibition may occur and reduce lycopene synthesis as well as vitamin C content of tomato fruit (Adegoroye and Jolliffe 1987;Prohens et al 2004). For example, Torres et al (2006) observed, either with or without UV radiation, that tomato fruit exposed for 5-h to high solar irradiance = No effect; : increased content; ; reduced content; Bold breeding and genetic engineering; * species/cultivars-dependent had 30% less ascorbic acid and 20% less dehydroascorbic acid in the fruit exocarp, suggesting a partial degradation of the entire ascorbate pool.…”

Section: Lightmentioning

confidence: 92%

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

2008

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It is widely accepted that a healthy diet is an important factor in preventing chronic diseases, and in improving energy balance and weight management. Studies have shown strong inverse correlations between tomato consumption and the risk of certain types of cancer, cardiovascular diseases and age-related macular degeneration. Because tomato is the second-most important vegetable in the world after potato, this horticultural crop constitutes an excellent source of health-promoting compounds due to the balanced mixture of minerals and antioxidants including vitamins C and E, lycopene, b-carotene, lutein and flavonoids such as quercetin. Improvement in phytonutrients in tomatoes can be achieved by cultivar selection, environmental factors, agronomic practices, stage of ripeness at harvest, and appropriate handling and conditioning all the way from the field to the consumer. The purpose of this paper is to review the recent literature of the main factors that can improve the nutritional quality of tomato and consequently their beneficial role in human diet. The importance of genotype selection and the optimization of environmental conditions (light, temperature, humidity, atmospheric CO 2 and air pollutants) for high nutritional value is outlined first, followed by the optimization of agricultural practices (soil properties, water quality, mineral nutrition, salinity, grafting, pruning, growing systems, growth promoters, maturity, and mechanical and pest injuries). The review concludes by identifying several prospects for future research such as modelling and genetic engineering of the nutritional value of tomato.

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Section: Lightmentioning

confidence: 92%

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

2008

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“…Cell membrane stability (CMS) was measured as electrolyte leakage according to McCollum and McDonald [38] and Prohens et al [41]. Ten disks (10-cm diameter) of fruit peels from all treatments were placed on 25 ml of mannitol 0.4 M and incubated under agitation for 24 h at room temperature.…”

Section: Cell Membrane Stability (Cms); Electrolyte Leakagementioning

confidence: 99%

Preharvest foliar applications of glycine-betaine protects banana fruits from chilling injury during the postharvest stage

Rodríguez-Zapata

Gil

Cruz-Martínez

et al. 2015

Chem. Biol. Technol. Agric.

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Background: Banana plantations are affected by environmental factors such as chilling injury, which reduces the quality of fruits and causes losses of up to 50% in the yield of banana and it will be more important in terms of global climate change. Chilling injury of the fruits can also occur during transport and storage at low temperatures, particularly in tropical fruits. In banana, losses of up to 20% can occur during postharvest handling. Given this situation, it is necessary to explore alternatives that might reduce chilling injury, such as the use of compatible solutes including glycine-betaine (GB). Results: In the present work, experiments were performed to analyze the possible role of preharvest foliar applications of GB, to prevent the subsequent development of chilling injury of banana fruits during the postharvest storage at low temperatures. After 3 days of the preharvest application of 100 mM GB over banana leaves (250 ml/plant), the fruits were harvested and first stored at 10°C for 6 h and then transferred to 23°C ± 1°C until they reached commercial ripening. A second group of plants were not treated with GB during the preharvest stage, but their fruits were exposed to 10°C for 6 h before transferring them to 23°C ± 1°C until they reached commercial ripening. A control group was untreated with GB during the preharvest stage, and fruits were not exposed to low temperatures but they were kept at 23°C until they reached commercial ripening.

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“…Such measurements characterize temperature changes very well and with fruit-inserted thermocouples connected to data logger with automated data recording make this procedure easy. However, they have some disadvantages including that the insertion of thermocouples wounds the fruit (Prohens et al, 2004) and makes the measurements on the same fruit unrepeatable in later times (thermocouples are usually used in a fruit for up to 24-h for FST measurements) (Ferguson et al, 1998). Small variations in the depth of insertion of the thermocouple can also significantly affect the results and cause abnormal pigmentation or fruit development.…”

Section: Thermal Measurementsmentioning

confidence: 99%

“…The associated changes in patterns of heat balance of the fruit surface can be monitored instantly and remotely by thermographic imaging. These technologies, therefore, seemed to be more useful when studying the course of sunburn development or detect temperature differences on the fruit surface in apples (Glenn et al, 2002;Evans, 2004;Gindaba & Wand, 2005van den Dool, 2006;Wand et al, 2006), tomatoes (Adams & Valdés, 2002) and pepino fruits (Prohens et al, 2004).…”

Section: Thermal Measurementsmentioning

confidence: 99%

Sunburn assessment: A critical appraisal of methods and techniques for characterizing the damage to apple fruit

Racskó

2010

Int. j. hortic. sci.

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Many methods and techniques have been introduced for measuring alterations in the fruit and in its surrounding environment related to sunburn incidence. The research objectives, fruit materials and the environment to be evaluated dictate the methods to follow. These procedures are either non-destructive and involve techniques that allow us to track the course of sunburn development and related environmental parameters, or destructive and involve the removal of fruit from the tree for field/laboratory measurements. Techniques employed can be used for pre-symptomatic monitoring (before symptoms become visible) or characterizing the symptoms already present. The principles behind the measurements and their usefulness for sunburn assessments are discussed and critically evaluated in this review paper. Descriptions and evaluations of the methods and techniques were made in the following groups: 1. Thermal measurements; 2. Visual assessments; 3. Fruit quality measurements; 4. Measurements of physiological and biochemical alterations; and 5. Practical evaluation of sunburn damage. Thermal measurements involve methods tracking the ambient temperature and fruit surface temperature, and their relation to sunburn formation. Visual assessments cover all measuring techniques (skin color, chlorophyll fluorescence, radiation reflection, electron microscopy) that are able to detect changes on/in the fruit skin related to sunburn formation. Fruit quality measurements are used to point out differences in qualities (soluble solids, firmness, titratable acidity, and water content) between unaffected and sunburned areas of the fruit. The measurements of physiological and biochemical alterations (gas exchange, pigment analysis, enzyme activity, gene expression) give us a better insight to the mechanism of sunburn formation. Practical evaluations involve many procedures that are used by scientists to characterize the susceptibility of cultivars, evaluate protection technology, etc. For this purpose, the following methods are in use: expressing the percentage of the total fruit surface area affected by sunburn or the percentage of the total number of fruits damaged on the tree, or even a scale based on the severity of the symptoms occurred. All assessing methods and techniques described here have their pros and cons as well as their specific applicability, therefore any of these cannot be favored to use exclusively for assessing sunburn incidence. The combination of these techniques will be the best choice to meet a given research objective perfectly.

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Temperature, electrolyte leakage, ascorbic acid content and sunscald in two cultivars of pepino,Solanum muricatum

Cited by 18 publications

References 15 publications

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

Preharvest foliar applications of glycine-betaine protects banana fruits from chilling injury during the postharvest stage

Sunburn assessment: A critical appraisal of methods and techniques for characterizing the damage to apple fruit

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