Environmental Regulation of Human Health Nutrients (Ascorbic Acid, β-Carotene, and Folic Acid) in Fruits and Vegetables

Lester, Gene E.

doi:10.21273/hortsci.41.1.59

Cited by 78 publications

(63 citation statements)

References 29 publications

(38 reference statements)

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“…Potassium-induced increases in fruit sugar levels have also been reported in hydroponically grown muskmelon plants (Lin et al 2004) however, the mechanism for this effect was also unclear. Although a threshold tissue K concentration for attaining optimum fruit sugar levels has not been established, our melon data (Lester et al 2005 and2006;Jifon and Lester 2009) provide additional evidence that fruit sugar concentrations can be increased through supplemental foliar K sprays.…”

Section: Number Of Foliar K Applicationsmentioning

confidence: 77%

“…Cumulative photosynthetic photon flux during fruit development (from pollination to final harvest) was higher in spring (982 mol·m −2 ) than in autumn (637mol·m −2 ). New findings suggest that weather and climate play key roles in the human-health bioactive compounds in fruits (Lester 2006). These studies highlight how global climate change might affect the nutritional properties of food crop and how, through the use of foliar applied K, growers may counteract these effects.…”

Section: K Fertilizer Application: Seasonal Influence and Silicone-bamentioning

confidence: 92%

“…Foliar K treatments ( Fig. 1) were applied weekly (between 0500 and 0800 a.m.) starting at fruit set, and continued till fruit maturation using K from various sources namely: potassium chloride (KCl), potassium nitrate (KNO 3 ), Peel thickness, quality (Gill and Singh 2005) Cucumber (Cucumis sativus) Firmness, sugars, vitamins Lester (2006); (Jifon and Lester 2009) Leaf K concentrations measured during the fruit maturation period were significantly lower (~13 g·kg −1 ) than the values measured before fruit set (~37 g·kg −1 ). Leaf K concentrations were also lower than the recommended sufficiency ranges (20-40 g·kg −1 ; Hochmuth and Hanlon 1995), even though preplant soil analysis indicated very high soil K concentrations (>600 mg·kg −1 ).…”

Section: Fruit Studies Comparing K Sourcesmentioning

confidence: 99%

“…The relative levels of sucrose and fructose in fruit also have important implications for consumer preference (relative sweetness) since fructose is perceived to be up to 80% sweeter than sucrose. Table 2 Influence of weekly supplemental foliar K -glycine amino acid-potassium (Gly-K) and potassium chloride (KCl) applied with or without a surfactant (S), to fruit-bearing plants grown with adequate soil K concentrations, on muskmelon fruit tissue pressure potential (Lester et. al., 2006) Treatment…”

Section: K Fertilizer Application: Seasonal Influence and Silicone-bamentioning

confidence: 99%

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Impact of potassium nutrition on postharvest fruit quality: Melon (Cucumis melo L) case study

2009

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Among the many plant mineral nutrients, potassium (K) stands out as a cation having the strongest influence on quality attributes that determine fruit marketability, consumer preference, and the concentration of critically important human-health associated phytonutrients. However, many plant, soil, and environmental factors often limit adequate uptake of K from the soil in sufficient amounts to satisfy fruit K requirements during development to optimize the aforementioned quality attributes. The objectives of this review are 1) to summarize published study abstracts on the effects of soil and/or foliar K fertilization as well as diverse K forms, on fruit phytonutrient concentrations; and 2) to illustrate the important role of K forms on fruit quality with a case study of Cucumis melo L (muskmelon) fruit produced with optimal soil applied K . The muskmelon studies will compare commercial sources (forms) of K applied to examine seasonal effects (spring vs. autumn) and the number of foliar K applications during fruit development on fruit marketability (maturity, yield, firmness, soluble solids, sugars, relative sweetness), consumer preference attributes (sugar content, sweetness, texture), and phytochemical concentrations (K, ascorbic acid, and β-carotene concentrations). Numerous studies have consistently demonstrated that specific K fertilizer forms, in combination with specific application regimes, can improve fruit quality attributes. Potassium fertilizer forms in order of effectiveness (Glycine (Gly)-complexed K=K 2 SO 4 ≥KCl>no K> KNO 3 ) when applied wet (foliar or hydroponic) vs. dry (soil) were generally superior in improving fruit marketability attributes, along with many humanhealth nutrients. The muskmelon case study demonstrated that two K forms: Gly-complexed K and K 2 SO 4 , combined with a silicone-based surfactant, applied weekly, as a foliar spray, during fruit development, from both autumn and spring-grown plants, had the greatest impact on improving fruit marketability attributes (maturity, yield, firmness, and sugars), as well as fruit quality attributes (human-health bioactive compounds K, ascorbic acid, and β-carotene). Among several foliar applied K salts studied under field conditions so far, salts with relatively low salt indices appeared to have the greatest impacts on fruit quality when applied during the mid-to late-season fruit development periods.

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Section: Number Of Foliar K Applicationsmentioning

confidence: 77%

Section: K Fertilizer Application: Seasonal Influence and Silicone-bamentioning

confidence: 92%

Section: Fruit Studies Comparing K Sourcesmentioning

confidence: 99%

Section: K Fertilizer Application: Seasonal Influence and Silicone-bamentioning

confidence: 99%

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Impact of potassium nutrition on postharvest fruit quality: Melon (Cucumis melo L) case study

2009

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“…Nevertheless, during fruit ripening, increasing PAR and more precisely, blue light, increased the fruit content of lycopene and b-carotene (Gautier et al 2004). For other plant species, blue light increased the ascorbic acid and anthocyanin fruit concentrations (Spalding and Cosgrove 1989;Parks et al 2001;Lester 2006).…”

Section: Lightmentioning

confidence: 99%

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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Polyaniline Sheathed Black Phosphorous: A Novel, Advanced Platform for Electrochemical Sensing Applications

et al. 2019

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Despite its excellent properties, the inherent unstable nature of black phosphorus (BP) in ambient atmosphere has severely restricted its use in electrochemical sensing applications. In this work, polyaniline (PANI) sheathed BP was prepared via the electrochemical polymerisation of aniline on BP coated screen printed carbon electrode (i. e., SPCE/BP) which resulted in an efficient, stable electrochemical platform (i. e., SPCE/BP@PANI) with improved properties which was evaluated for electrochemical detection of two model bioanalytes namely, ascorbic acid (AA) and Hydrazine (Hy). The formation of PANI on the SPCE/BP exhibited a pair of stable and well‐defined redox peaks indicating the better adsorption energy and fast electron transfer nature of BP as compared to other 2D materials like graphene and transitional metal dichalcogenides. FESEM and XPS studies revealed the formation and uniform growth of PANI on BP surface without any aggregation. Electrochemical impedance spectroscopy analyses revealed that SPCE/BP@PANI can act as a suitable electrocatalyst material for the sensing of AA and Hy. Thus, SPCE/BP@PANI electrode exhibited low limit of detection (DL; 1.69 μM), excellent reproducibility and better selectivity towards AA oxidation over glucose, sucrose, urea, citric acid, sodium, nitrate, nitrite and magnesium with a sensitivity of 3.38 A M−1 cm−2 (R2=0.98) in the dynamic range of 10–1100 μM. The excellent analytical performance of the BP@PANI is plausible due to better adsorption energy and fast electron transfer of BP. Further, SPCE/BP@PANI was also used for successful detection of AA in processed fruit juice with good recovery. Under the optimal DPV conditions, the modified electrode was extended for detection of Hy in a linear range of 100–1500 μM with sensitivity of 0.09 A M−1 cm−2 (R2=0.99) and DL=89 μM validating the potential of BP based composites in wide range of electrochemical applications.

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Environmental Regulation of Human Health Nutrients (Ascorbic Acid, β-Carotene, and Folic Acid) in Fruits and Vegetables

Cited by 78 publications

References 29 publications

Impact of potassium nutrition on postharvest fruit quality: Melon (Cucumis melo L) case study

Impact of potassium nutrition on postharvest fruit quality: Melon (Cucumis melo L) case study

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

Polyaniline Sheathed Black Phosphorous: A Novel, Advanced Platform for Electrochemical Sensing Applications

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