scholarly journals AMINOETHOXYVINYLGLYCINE AND FOLIAR ZINC TREATMENTS PLAY A KEY ROLE IN PRE-HARVEST DROPS AND FRUIT QUALITY ATTRIBUTES OF ‘WILLIAM’S PRIDE’ APPLE

2019 ◽  
Vol 18 (2) ◽  
Author(s):  
Burhan Ozturk ◽  
Kenan Yıldız ◽  
Halil Erdem ◽  
Orhan Karakaya ◽  
Ahmet Ozturk
Keyword(s):  
Antioxidant Activity ◽  
Skin Color ◽  
Total Phenolics ◽  
Soluble Solids ◽  
Ethylene Synthesis ◽  
Ethylene Concentration ◽  
Color Development ◽  
Red Color ◽  
Hue Angle ◽  
Solids Content

Effects of pre-harvest aminoethoxyvinylglycine (AVG, 250 mg L–1) and zinc (0.3% ZnSO4) treatments on pre-harvest fruit drops, internal ethylene concentration (IEC), flesh firmness, color characteristics (L*, chroma and hue angle), soluble solids content (SSC), acidity, total phenolics, antioxidant activity, flesh and leaf micronutrients and macronutrients of ‘William’s Pride’ apples, were investigated in this study. AVG was sprayed 4 weeks before the anticipated harvest date and Zn was sprayed when the fruits reached the size of a walnut. As compared to the control, both the single AVG and zinc treatments significantly reduced the pre-harvest drops. However, combined AVG + Zinc treatments were found to be more effective in reducing the pre-harvest drops. At the last measurement date (15th of August), 60% fruit drop was measured in control, but 22% in AVG + Zinc treatment. AVG and AVG + Zinc treatments reduced ethylene synthesis. On the other hand, single zinc treatments stimulated ethylene synthesis. AVG treatments retarded red skin color development, but zinc treatments again stimulated red color development. As compared to the control and single zinc treatments, AVG-treated fruits had greater firmness and acidity values, but lower SSC values. While AVG treatments increased the total phenolics and antioxidant activity, zinc treatments decreased these attributes. As compared to the control, zinc treatments significantly increased flesh Cu, N, P and K contents and leaf Mn, N and P contents. Based on present findings, it was concluded that AVG could be used as an efficient tool to reduce the pre-harvest drops in apples.

scholarly journals PHYTONUTRIENT EVALUATION OF STRAWBERRIES FROM FIELD AND GREENHOUSE PRODUCTION ENVIRONMENTS

HortScience ◽  
2005 ◽  
Vol 40 (3) ◽  
pp. 879c-879
Author(s):  
Fumiomi Takeda ◽  
Gene Lester ◽  
Craig Chandler ◽  
Penny Perkins-Veazie ◽  
Ronald Prior
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Folic Acid ◽  
Environmental Conditions ◽  
Skin Color ◽  
Sampling Period ◽  
Soluble Solids ◽  
Greenhouse Production ◽  
Color Development ◽  
Production Environments

Fresh strawberries (Fragaria ×ananassa Duch) are readily available throughout the year with several new cultivars being successfully grown in diverse environmental conditions (e.g., field and greenhouse). Consumption of strawberries with higher nutritive values and antioxidant activity may contribute to improved human wellness. Phytonutrient contents and antioxidant activity was measured as oxygen radical absorbance capacity (ORAC) were assayed in berries (`Camarosa', `Diamante', and `Gaviota') sampled in January, February to March, and April to May from fields in Plant City, Fla., and Oxnard, Calif., and from a greenhouse in Kearneysville, WV. Strawberry cultivars varied in skin color, soluble solids, total phenolics, and anthocyanins, ascorbic acid, folic acid, and ORAC activity. Response to environment was cultivar dependent. All phytonutrient constituents were lower in `Diamante' berries compared to `Camarosa' and `Gaviota'. For all cultivars, berry ORAC activity declined as TSS increased, and ORAC activity was coincident with phenolic content. ORAC activity in berries fruit harvested from plants grown in a temperature-controlled greenhouse did not change during the January to May sampling period. For `Gaviota', ORAC activity in greenhouse-produced berries was the same as that of field-produced berries. Whereas greenhouse vs. field-gown `Camarosa' and `Diamante' berries ORAC was higher and lower respectively. These findings demonstrate that the environmental conditions in greenhouses in Kearneysville, W.Va., from winter to spring are adequate for `Camarosa' and `Gaviota' color development, but not for `Diamante' strawberries. Of the three cultivars, only `Camarosa' was highly productive (1.2 kg berries per plant), even in the greenhouse. Berries were high in ascorbic acid, folic acid, phenolic acid, anthocyanins, and ORAC activity.

scholarly journals Effect of maturation stage on the physical-chemical composition and bioactive compounds of Solanum granosos-leprosum Dunal fruits

2020 ◽  
Vol 9 (9) ◽  
pp. e22996323
Author(s):  
Leandro Levate Macedo ◽  
Cintia da Silva Araújo ◽  
Daiana Ribeiro Vilela ◽  
Hugo Calixto Fonseca ◽  
Nádjla Miranda Vilela Goulart ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Total Phenolics ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Maturation Stage ◽  
Maturation Stages ◽  
Three Stages ◽  
Solids Content ◽  
Developmental Maturation

The aim of this study was to characterize the capoeira-branca (Solanum granuloso-leprosum Dunal) fruits cultivated in Lavras, Minas Gerais, Brazil. The fruit growth was evaluated, from inflorescence to ripening. For this, measurements were made weekly. The fruits were harvested and separated at three developmental maturation stages (1-immature; 2-green mature; 3-mature), according to the color and size. Then, the fruits were evaluated by size, weight, color, respiration, firmness, pH, titratable acidity, soluble solids, soluble pectin, centesimal composition, vitamin C and antioxidant activity at three stages. During maturation, the fruits showed increase in mass (0.4076 to 0.9956 g), size (7.9 to 12.2 mm), glycidic fraction (15.95 to 27.23%) and ash (0.94 to 1.60%) and reduction in firmness (4.23 to 1.50 kgf), moisture (79.24 to 69.45%) and protein (3.49 to 1.41%) contents. Furthermore, there was increase in soluble solids content (8.80 to 13.80%), antioxidant activity (62.57 to 69.63 μM de trolox.g-1 and 1880.34 to 4602.40 mg.100g-1) and vitamin C (46.81 to 236.02 mg.100g-1) and a decrease in the total phenolics (257.58 to 171.00 mg.100g-1) and soluble pectin (0.92 to 0.69 mg.g-1). The fruits, even after ripening, maintained their greenish color, although less intense than that observed in immature and mature green fruits.

scholarly journals Physicochemical and Bioactive Characterisation of Edible and Waste Parts of “Piel de Sapo” Melon

Horticulturae ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 60 ◽  
Author(s):  
Fátima Alves Miller ◽  
Joana Freitas Fundo ◽  
Ester Garcia ◽  
João Rodrigo Santos ◽  
Cristina Luisa Miranda Silva ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Bioactive Compounds ◽  
Total Phenolics ◽  
Titratable Acidity ◽  
Physicochemical Characteristics ◽  
Soluble Solids ◽  
Total Carotenoids ◽  
Total Antioxidant ◽  
Solids Content

Several scientific studies point fruits as rich sources of antioxidants but mainly focus on their edible part. However, fruits wastes are abundant sources of bioactive compounds and nutrients, which are considered to be health beneficial. The main purpose was to characterise juice, pulp, peel and seeds of Piel de Sapo melon, in terms of several physicochemical characteristics (soluble solids content, titratable acidity, pH, potassium, colour and water activity), some bioactive compounds (total phenolics, vitamin C, chlorophylls and total carotenoids) and total antioxidant activity. Juice, pulp, peel and seeds represent 47, 19, 27 and 5% of melon total weight, respectively. Peel and seeds stood out by their higher concentration of total phenolics compounds and antioxidant activity when compared to edible parts. The highest potassium concentration was found in seeds. Chlorophylls were only detected in peel, while carotenoids were not detected in any part of the melon analysed. Juice and pulp contributed to 69% of vitamin C amount of the whole fruit. However, its concentration in peel was equivalent to the ones observed in juice and pulp. These results pointed out the importance of fruit wastes valorisation and the development of strategies for their re-utilisation.

scholarly journals Active Control of Greenhouse Climate Enhances Papaya Growth and Yield at an Affordable Cost

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 378
Author(s):  
Irene Salinas ◽  
Juan José Hueso ◽  
Julián Cuevas
Keyword(s):  
Active Control ◽  
Skin Color ◽  
Natural Ventilation ◽  
Control Strategies ◽  
Soluble Solids ◽  
Growth And Yield ◽  
Climate Control ◽  
Tropical Fruit ◽  
Greenhouse Climate ◽  
Solids Content

Papaya is a tropical fruit crop that in subtropical regions depends on protected cultivation to fulfill its climate requirements and remain productive. The aim of this work was to compare the profitability of different climate control strategies in greenhouses located in subtropical areas of southeast Spain. To do so, we compared papayas growing in a greenhouse equipped with active climate control (ACC), achieved by cooling and heating systems, versus plants growing in another greenhouse equipped with passive climate control (PCC), consisting of only natural ventilation through zenithal and lateral windows. The results showed that ACC favored papaya plant growth; flowering; fruit set; and, consequently, yields, producing more and heavier fruits at an affordable cost. Climate control strategies did not significantly improve fruit quality, specifically fruit skin color, acidity, and total soluble solids content. In conclusion, in the current context of prices, an active control of temperature and humidity inside the greenhouse could be a more profitable strategy in subtropical regions where open-air cultivation is not feasible.

scholarly journals Quality of strawberries subjected to pre-harvest UV-C radiation

2021 ◽  
Vol 56 ◽  
Author(s):  
Izabel Camacho Nardello ◽  
Rufino Fernando Flores Cantillano ◽  
Jardel Araújo Ribeiro ◽  
Gerson Kleinick Vignolo ◽  
Marcelo Barbosa Malgarim ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Experimental Design ◽  
Vitamin C ◽  
Fragaria X Ananassa ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Single Factor ◽  
Solids Content ◽  
Uv C

Abstract The objective of this work was to evaluate the influence of the use of UV-C radiation at an intensity of 0.53 KJ m-2, during strawberry (Fragaria x ananassa) cultivation, on the physicochemical and phytochemical parameters of the fruits. The used experimental design was completely randomized, in a single-factor arrangement with 11, 19, 29, and 39 UV-C applications and without UV-C application. The hue of the fruits was smaller at the end of the study period. pH varied in strawberries that received 39 applications of UV-C, and the soluble solids content differed with 19 applications. Antioxidant activity was lower in fruits with 11, 19, and 29 UV-C applications, whereas vitamin C content was lower only in fruits that received 29 applications. The use of UV-C radiation at an intensity of 0.53 KJ m-2, during strawberry cultivation, affects the physicochemical and phytochemical parameters of the fruits, but does not cause losses in their quality.

scholarly journals Evaluation of fermented tea (kombucha) quality

2020 ◽  
Vol 26 (4) ◽  
Author(s):  
Vanesa Šliažaitė ◽  
Aurelija Paulauskienė ◽  
Aurimas Krasauskas
Keyword(s):  
Antioxidant Activity ◽  
Acetic Acid ◽  
Sensory Evaluation ◽  
Total Content ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Soluble Solids Content ◽  
Fermentation Conditions ◽  
Solids Content

The research was done at Aleksandras Stulginskis University (Vytautas Magnus University Agriculture Academy since 2019) in 2017–2018. The research object was kombucha beverage brewed from Camellia sinensis L. black, green, oolong, pu-erh tea and fermented for 9 and 22 days by microorganisms at different room lighting conditions. The soluble solids content, active acidity and titratable acidity were determined in teas fermented for 22 days. The total amount of phenolics compounds, antioxidant activity, yeast colonies and sensory evaluation of tea were determined in teas fermented for 9 days. The research results showed that the quality of fermented tea was dependent on the tea species, but fermentation conditions were not essential. During the fermentation the soluble solids content of tea decreased by an average of 0.60% and the content of acetic acid increased by 0.34%. The highest content of acetic acid was found on the 22nd day of fermentation in all species of teas. The active acidity (pH) of all investigated species of teas decreased significantly during the fermentation process. The total content of phenolic compunds in all species of teas during the fermentation increased from 20 to 57% regardless of fermentation conditions. The highest content of total phenolic compounds was established in teas fermented for 9 days. The antioxidant activity of teas fermented for 9 days varied depending on the fermentation conditions. For black and green teas fermented in the light the antioxidant activity decreased, for oolong and pu-erh teas fermented in the dark the antioxidant activity increased. The number of yeast colonies increased in all tea samples during the fermentation. The best taste was fixed for pu-erh tea, which scored the highest (11.4) in sensory evaluation.

scholarly journals Peach Fruit Quality Is Affected by Shade during Final Swell of Fruit Growth

1991 ◽  
Vol 116 (3) ◽  
pp. 383-389 ◽  
Author(s):  
Richard P. Marini ◽  
Donald Sowers ◽  
Michele Choma Marini
Keyword(s):  
Fruit Quality ◽  
Prunus Persica ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Photon Flux ◽  
Fruit Drop ◽  
Red Color ◽  
Solids Content ◽  
Fruit Harvest ◽  
The Relationship

Girdled or nongirdled `Biscoe' peach (Prunus persica [L.] Batsch) secondary scaffold branches were covered with shade fabric to provide a range of photosynthetic photon flux densities (PPFD) from 44 to 20 days before harvest (DBH), from 20 to 0 DBH or 44 to 0 DBH. Fruit quality was affected differently by the various periods of shade during the final swell of fruit development. Shading 40 to 20 DBH did not affect fruit weight or quality, whereas shading 44 to 0 DBH had the greatest effect on fruit weight and quality. Fruit quality was generally similar on branches exposed to 100% and 45% incident PPFD (IPPFD). Fruit on” girdled branches generally responded to shade more than fruit on nongirdled branches. Fruit weight was positively related to percent IPPFD for girdfed but not nongirdled branches shaded 20 to 0 DBH and 44 to DBH. On nongirdled branches, fruit exposed to 45% IPPFD for 44 to 0 DBH had 14% less red color and 21% lower soluble solids content (SSC) than nonshaded fruit. Harvest was delayed >10 days and preharvest fruit drop was increased by shading to <23% IPPFD. Shading branches for 20 to 0 or 44 to 0 DBH altered the relationship between flesh firmness and ground color: Firmness declined as ground color changed from green to yellow for fruit shaded 44 to 20 DBH, but firmness declined with little change in ground color for fruit shaded 20 to 0 or 44 to 0 DBH. Girdling results indicated that fruit weight and SSC partially depended on photosynthate from nonshaded portions of the canopy, whereas fruit redness, days from bloom to harvest, and ground color depended on PPFD in the vicinity of the fruit.

scholarly journals Foliar Application of Phosphorus Improves Apple Fruit Color During Ripening

2015 ◽  
Vol 63 (4) ◽  
pp. 1195-1200 ◽  
Author(s):  
Franci Štampar ◽  
Jan Bizjak ◽  
Robert Veberič ◽  
Jerneja Jakopič
Keyword(s):  
Skin Color ◽  
Total Phenolics ◽  
Foliar Application ◽  
Apple Fruit ◽  
Fruit Color ◽  
Anthocyanin Content ◽  
Red Color ◽  
Total Anthocyanins ◽  
Quercetin Glycosides ◽  
Apple Production

The red color of skin is a much desired property in apple production. For better red fruit coloration the applications of foliar fertilizers on the basis of calcium and phosphorus are used. In the present study ‘Braeburn’ apple trees were sprayed twice with Phostrade Ca (phosphorus), 5 and 3 weeks before harvest. In 7-days intervals fruit color, the content of flavonoids and enzyme activity involved in the synthesis of anthocyanins have been monitored. Foliar application of Phostrade Ca caused a more intense red skin color of apples and higher anthocyanin content. Their level increased during ripening, in treated apples the content of total anthocyanins was 20-fold higher at harvest while in control apples only 9-fold higher compared to the initial values. Cyanidin 3-galactoside was the most abundant anthocyanin (80 to 86% of total anthocyanins), followed by cyanidin 3-arabinoside, cyanidin 3-glucoside, cyanidin 3-xyloside and cyanidin 7-arabinoside. Prostrade Ca increased the levels of all quercetin glycosides, with the exception of quercetin 3-rhamnoside. No significant influence of Phostrade Ca on the content of hydroxycinnamic acids, dihydrochalcones, flavanols and total phenolics has been monitored. The activity of FHT and DFR increased during ripening but Phostrade Ca influenced only higher activity of DFR.

scholarly journals ANTIOXIDANT ACTIVITY DURING STORAGE OF APPLES SUBJECTED TO IRRADIATION

2015 ◽  
Vol 39 (3) ◽  
pp. 269-275 ◽  
Author(s):  
Camila Argenta Fante ◽  
Heloísa Helena de Siqueira Elias ◽  
Paôla de Castro Henrique ◽  
Ana Carolina Vilas Boas ◽  
Luiz Carlos de Oliveira Lima
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Soluble Solids ◽  
Antioxidant Compounds ◽  
Post Harvest ◽  
Apple Cultivars ◽  
Solids Content ◽  
Physical And Chemical ◽  
Β Carotene ◽  
Low Irradiation

Nowadays, the number of studies about fruit conservation as well as the benefits of consumption of foods rich in antioxidant compounds was increased. This study aimed to quantify antioxidant compounds and their activity and to evaluate the physical and chemical changes during the post-harvest storage of Eva's apple cultivars that were subjected to gamma irradiation at doses of 0; 0.5; 1.0 and 1.5 kGy. The antioxidant activity was measured by the 2.2-diphenyl-1-picrylhydrazyl (DPPH) and the β-carotene/linolenic acid methods. Levels of total phenolics, ascorbic acid, color, and soluble solids were evaluated. The results showed that, regardless of the irradiation dose, there was an increase in % SRL during post-harvest storage of Eva's apples. Low irradiation doses were able to preserve the phenolic compounds, maintain the ascorbic acid levels and avoid an increase in the soluble solids content.

Composition of commercially produced organic and conventional strawberries

2014 ◽  
Vol 44 (6) ◽  
pp. 562-575 ◽  
Author(s):  
Tõnu Tõnutare ◽  
Kati Keert ◽  
Lech Szajdak ◽  
Ulvi Moor
Keyword(s):  
Bioactive Compounds ◽  
Design Methodology ◽  
Total Phenolics ◽  
Production Systems ◽  
Soluble Solids ◽  
Fragaria Ananassa ◽  
Cultivation System ◽  
Content Type ◽  
Total Antioxidant ◽  
Solids Content

Purpose – The purpose of this study was to determine differences in taste-related and bioactive compounds of organically (OR) and conventionally (CONV) cultivated commercially produced strawberries (Fragaria × ananassa Duch.). Addresses the question if the consumers buying OR strawberries are likely to purchase fruits with better taste and richer in bioactive compounds than those buying CONV fruits. Design/methodology/approach – Only information commonly available to the consumers [cultivar, quality class, product origin (country) and eco-labelling], was considered in selecting experimental material. “Polka” strawberries from 14 farms (7 OR and 7 CONV) from South Estonia were used for analyses. Findings – No evidence was found that OR strawberries contain more bioactive compounds or have higher soluble solids content and titratable acids ratio (associated with better taste) compared to CONV strawberries. There were significant differences in content of total phenolics, anthocyanins, ascorbic acid, vitamin E, total antioxidant capacity, titratable acids and soluble solids between strawberries from individual farms irrespective of cultivation system. Research limitations/implications – Our study was limited to strawberry “Polka” and some other cultivars might response differently to production systems. Social implications – Consumers get information that by choosing an organic product in the marketplace, it is not guaranteed that this product has higher content of bioactive compounds. Originality/value – Comparative studies of organic and conventional products are preferably performed with products grown at the same location with the same amount of nutrients etc. However, information of production site’s microclimate, soil texture or the amount of plant available nutrients is never available to the consumers. Therefore, our consumer-oriented approach might be valuable.

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