Influence of the Period of Peach Tree Chemical Thinning on Fruit Quality

The need to decrease production costs along with the lack of man power in the countryside has asked for cultural practices which lead to these factors, such as thinning. Thus, chemical thinning has been studied as an alternative to fruit manual thinning. Therefore, this study aimed at evaluating the quality of peach tree fruits after chemical thinning with metamitron at different time periods in the south of Brazil. The experiment was carried out in a commercial peach tree orchard with cultivars ‘Maciel’ in Morro Redondo, Rio Grande do Sul state, Brazil, from 2015 to 2016. Treatments consisted in the application of metamitron (doses of 200 mg L-1) on the 20th, 30th, 40th, 50th and 60th day after full bloom (DAFB) and manual thinning on the 40th DAFB. Epidermis color, pulp firmness, ripeness index, soluble solids, titratable acidity, juice pH, total phenolic compounds and antioxidant activity were evaluated. The application of metamitron in peach tree thinning did not affect peach color. Changes in the other variables related to the quality of fruits depended on the application period of metamitron in the thinning process and between crops.

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GARLIC QUALITY AS A FUNCTION OF SEED CLOVE HEALTH AND SIZE AND SPACING BETWEEN PLANTS

Revista Caatinga ◽

10.1590/1983-21252019v32n413rc ◽

2019 ◽

Vol 32 (4) ◽

pp. 966-975 ◽

Cited By ~ 3

Author(s):

MAYKY FRANCLEY PEREIRA DE LIMA ◽

WELDER DE ARAÚJO RANGEL LOPES ◽

MARIA ZULEIDE DE NEGREIROS ◽

LEILSON COSTA GRANGEIRO ◽

HIAGO COSTA DE SOUSA ◽

...

Keyword(s):

Cultural Practices ◽

Soluble Sugars ◽

Titratable Acidity ◽

Economic Importance ◽

Soluble Solids ◽

Postharvest Quality ◽

Total Soluble Sugars ◽

Food Industries ◽

Seed Health

ABSTRACT Garlic has a worldwide economic importance; this vegetable can be consumed fresh or processed by food industries. However, few studies evaluate its postharvest quality. It is necessary to establish cultural practices and methods that focus not only on increase of yield, but on obtaining a product with better postharvest quality. The objective of this work was to evaluate the bulb quality of conventional garlic and virus-free garlic as a function of seed clove size and space between plants. Two experiments were conducted simultaneously in Portalegre, Rio Grande do Norte, Brazil. A randomized block experimental design with four replications was used in both experiments. The treatments were arranged in split-plots, with the seed clove size (large and small) in the plots, and the plant spacings (7.5, 10.0, 12.5, and 15.0 cm between plants) in the subplots. The use of large seed cloves resulted in higher bulb diameter and titratable acidity (TA). Soluble solids (SS), total soluble sugars, SS to TA ratio, and total solids decreased as the space between plants was increased, regardless of the seed health and seed clove size. Virus-free garlic seed cloves planted with spacing of 12.5 and 15.0 cm resulted in higher bulb diameter, TA, pungency, and industrial index, i.e., they produced better quality bulbs with good prospects for industrialization.

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Use of Modified Atmosphere Packaging to Manage Quality of Green Garlic Leaves during Cold Storage Period

Emirates Journal of Food and Agriculture ◽

10.9755/ejfa.2020.v32.i7.2122 ◽

2020 ◽

pp. 550

Author(s):

Selen Akan ◽

Özge Horzum

Keyword(s):

Chlorophyll Content ◽

Cold Storage ◽

Pearson Correlation ◽

Modified Atmosphere Packaging ◽

Storage Period ◽

Titratable Acidity ◽

Quality Parameters ◽

Soluble Solids ◽

Total Phenolic

Green garlic leaves are consumed as fresh and cooked in Turkey and in some part of the world such as Asia, America and Africa. This crop could be considered as a promising export product in Turkey’s exportation volume. For this reason, we investigated how different package materials such as low-density polyethylene (LDPE) and closed polypropylene transparent boxes (CPTB) maintain some quality parameters of green garlic (Allim sativum L.) leaves. For that purpose, garlic leaves were stored at 10 °C and 80±5% relative humidity for 12 days after cutting, pre-cooling and packaging. Weight loss (WL), soluble solids content (SSC), titratable acidity (TA), chlorophyll content as SPAD reading, visual quality (VQ), color, total phenolic content (TPC) and total antioxidant capacity (TAC) were measured at 3, 6, 9 and 12 days during storage period. Our results indicated that both packaging materials significantly maintained (P ≤ 0.05) WL, TA, chlorophyll content, VQ and TPC compared to controls (unpacked samples). Pearson Correlation tests showed that WL, color (L*, b*), TA and TAC could be used as marker to determine storage life of green garlic leaves. In addition, CPTB package is more effective in maintaining quality of green garlic leaves during cold storage.

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Postharvest mechanical damage affects fruit quality of 'Montenegrina' and 'Rainha' tangerines

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2009001200011 ◽

2009 ◽

Vol 44 (12) ◽

pp. 1636-1640 ◽

Cited By ~ 20

Author(s):

Cândida Raquel Scherrer Montero ◽

Lígia Loss Schwarz ◽

Liege Cunha dos Santos ◽

Cristiane Salete Andreazza ◽

Carolina Pereira Kechinski ◽

...

Keyword(s):

Ascorbic Acid ◽

Mechanical Damage ◽

Titratable Acidity ◽

Soluble Solids ◽

Internal Quality ◽

Color Changes ◽

Randomized Design ◽

Total Titratable Acidity ◽

Completely Randomized Design

The objective of this work was to evaluate the visual and chemical quality of tangerines after mechanical damage by impacts. The tangerine cultivars Montenegrina and Rainha were submitted to different degrees of impact and evaluated for decay and oleocellosis, loss of fresh weight, total soluble solids, total titratable acidity and ascorbic acid degradation, as well as for epicarp color changes. Experiments with three replicates and experimental units of six fruit for each cultivar were done in a completely randomized design. Impact produced qualitative internal and minor external changes on tangerines. The main modifications produced by impact on the fruit were losses of citric acid and soluble solids, which increased the solid:acid ratio, and losses of ascorbic acid. 'Montenegrina' tangerines are more susceptible to internal quality damage than 'Rainha'.

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Responses of Apples to Postharvest Jasmonate Treatments

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.123.3.421 ◽

1998 ◽

Vol 123 (3) ◽

pp. 421-425 ◽

Cited By ~ 22

Author(s):

Xuetong Fan ◽

James P. Mattheis ◽

John K. Fellman

Keyword(s):

Color Change ◽

Titratable Acidity ◽

Apple Fruit ◽

Soluble Solids ◽

Maximum Effect ◽

Minimum Concentration ◽

Color Changes ◽

Promotive Effect ◽

Solids Content

The effect of exogenous methyl jasmonate (MJ) and jasmonic acid (JA) compared with the effect of ethephon on surface color and quality of `Golden Delicious' and `Fuji' apples (Malus ×domestica Borkh.) was studied. Treatments were applied by dipping fruit in water solutions of JA, MJ, or ethephon or by exposing fruit to MJ vapors. Response to MJ vapor treatment depended on fruit developmental stage, with the maximum effect occurring as fruit began to produce ethylene. MJ promoted color changes more effectively than JA. The promotive effect of JA increased with JA concentration. A minimum concentration of 0.1 mmol·L-1 JA was needed to promote significant color change within 15 d at 20 °C. JA at 1 or 10 mmol·L-1 promoted color change more effectively than 0.35 or 3.5 mmol·L-1 ethephon. The magnitude of JA-promoted responses decreased at lower temperatures. Treatments with 10 mmol·L-1 JA or 3.5 mmol·L-1 ethephon were phytotoxic. Treatments using JA at 1 or 10 mmol·L-1 in water promoted loss of fruit titratable acidity compared to controls. Firmness and soluble solids content were relatively unresponsive to JA treatments. Based on these results, using JA and MJ to promote degreening of apple fruit with minimal loss of other quality attributes appears feasible.

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‘Maciel’ peach tree development grafted on ‘Flordaguard’ clonal rootstock in different periods

Agronomy Science and Biotechnology ◽

10.33158/asb.2017v3i2p74 ◽

2017 ◽

Vol 3 (2) ◽

pp. 74

Author(s):

Aline Ramm ◽

Márcia Wulff Schuch ◽

Cíntia de Moraes Fagundes ◽

Jacqueline Barcelos da Silva Silva ◽

Roseane Maidana Moreira

Keyword(s):

Titratable Acidity ◽

Soluble Solids ◽

Plant Production ◽

Peach Tree ◽

Trunk Diameter ◽

Physical Chemical ◽

Dormant Bud ◽

Canopy Volume ◽

Tree Development

The objective of this study was to compare the vegetative and productive aspects and the quality of “Maciel” peach fruits grown on ‘Flordaguard’ clonal rootstock obtained from mini-cuttings, in different grafting periods (active bud and dormant bud). The experiment was conducted in an orchard located at Centro Agropecuario de Palma, in the county of Capao Leao, by Universidade Federal de Pelotas, RS (UFPel), from 2014/15 to 2015/16. The following variables related to the vegetative aspects were evaluated: canopy volume, trunk diameter, branch diameter, plant height, phenology (initial, full and final flowering) , productive aspects, estimated productivity (t.ha-1), production (kg. plant), production effectiveness, fruit diameter and physical-chemical characteristics such as firmness, color, pH, titratable total acidity, soluble solids, soluble solids/ titratable acidity relationship, antioxidant capacity, phenolic compounds and carotenoids. The most recommended grafting method for the ‘Maciel’ peach tree on ‘Flordaguard’ rootstock propagated by mini-cuttings is the active bud grafting.

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Effects of Controlled Atmosphere on the Storage Quality and Aroma Compounds of Lemon Fruits Using the Designed Automatic Control Apparatus

BioMed Research International ◽

10.1155/2019/6917147 ◽

2019 ◽

Vol 2019 ◽

pp. 1-17

Author(s):

Yuan Ma ◽

Shaohua Li ◽

Xiaocui Yin ◽

Yage Xing ◽

Hongbin Lin ◽

...

Keyword(s):

Volatile Compounds ◽

Storage Time ◽

Storage Period ◽

Titratable Acidity ◽

Soluble Solids ◽

Total Phenolic ◽

Controlled Atmosphere ◽

Control Apparatus ◽

Better Than

‘Eureka’ lemon fruits were stored under four controlled atmosphere- (CA-) combinations at 8°C for 20 days to investigate the effects on weight loss (WL), total soluble solids (TSS), titratable acidity (TA), vitamin C (VC), total phenolic content (TPC), sodium carbonate-soluble pectin (SSP), malondialdehyde (MDA), and volatile compounds. Results showed that the contents of TSS, TA, VC, and SSP in the stored fruits reduced during the storage period, while the WL and MDA increased. Fruit stored under CA2-combination (6 % O2+8 % CO2) showed the lower contents of WL and MDA and the higher content of TSS, TA, TPC, and VC than that of other treated fruits. The main volatile compounds present in the lemons were terpenoids, aldehydes, alcohols, and esters. In addition, both the terpenoid and aldehyde content are substantially higher in lemons exposed to CA2 conditions. In contrast, the alcohols and esters displayed elevated levels in the regular air (RA) stored fruit. In conclusion, CA with the suitable conditions proves to be better than RA as a storage regimen to keep the quality of lemons. These results indicated that the application of 6% O2+8% CO2 CA conditions could maintain the quality of ‘Eureka’ lemon fruit during the storage time of 20 days and should be the optimal storage environment for postharvest Eureka lemons.

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Effect of different 1-methylcyclopropene doses on the postharvest period of pitahaya fruits (Selenicereus megalanthus Haw.)

Revista Facultad Nacional de Agronomía Medellín ◽

10.15446/rfna.v69n2.59142 ◽

2016 ◽

Vol 69 (2) ◽

pp. 7975-7983 ◽

Cited By ~ 2

Author(s):

Javier Giovanni Álvarez-Herrera ◽

Yuli Alexandra Deaquiz ◽

Anibal O. Herrera

Keyword(s):

Titratable Acidity ◽

International Markets ◽

Soluble Solids ◽

Postharvest Quality ◽

Total Carotenoids ◽

Color Changes ◽

Dragon Fruit ◽

Total Titratable Acidity ◽

Loss Of Mass

Colombia is one of the leading producers of yellow dragon fruit, but exports of this fruit is low when compared to the domestic production because most do not meet the requirements of international markets in terms of quality and preservation. As a result, this study aimed to determine the effect of the application of 1-methylcyclopropene (1-MCP) on the preservation and quality of dragon fruit, given that it has been effective in the conservation and postharvest quality of many agricultural species allowing longer life, using a completely randomized experiment design with three treatments: 0, 300 and 600 mg L-1 of 1-MCP, with four replications. The 600 mg L-1 of 1-MCP dose was able to maintain the quality of the dragon fruit longer (28 days after harvest (dah)) because it managed to reduce the respiratory rate. The application of 1-MCP did not affect the firmness, loss of mass, total soluble solids, total titratable acidity, or total carotenoids in the fruits. The application of 1-MCP slowed the loss of fruit quality in terms of color because the 600 mg L-1 dose maintained the lightness of the fruits longer, reduced the color changes as expressed in a* and b* values and decreased the chlorophyll degradation.

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Diversification and Soil Management Effects on the Quality of Organic Apricots

Agronomy ◽

10.3390/agronomy11091791 ◽

2021 ◽

Vol 11 (9) ◽

pp. 1791

Author(s):

Roberto Ciccoritti ◽

Roberto Ciorba ◽

Francesco Mitrano ◽

Marcello Cutuli ◽

Tiziana Amoriello ◽

...

Keyword(s):

Cover Crops ◽

Dry Matter ◽

Soil Management ◽

Titratable Acidity ◽

Climatic Conditions ◽

Soluble Solids ◽

Total Phenolic ◽

Organic System ◽

High Solar Radiation

Nutritional and commercial value of the apricot fruits depends on the interaction among several factors, including the management strategies, the environmental conditions, and the genotype. This study aimed to evaluate the effect of orchard management and pedoclimatic conditions on apricot fruit quality traits (soluble solids, titratable acidity, dry matter and soluble solids and titratable acidity ratio) and phytochemical content (total phenolic content and antioxidant activity). Two apricot cultivars (Kioto* and Pieve*) were subjected to three different organic systems: (i) a standard management (BAU), (ii) an innovative diversified system with reduced tillage based on the natural cover conservation (INC) and (iii) an innovative diversified system with introduction of different cover crops (ICC), for two consecutive years (2019–2020). Overall, besides the effect of the climatic conditions, the multivariate analysis revealed the role of management systems, rather than genotype, on the quality of apricot fruits. In particular, INC soil management positively affected soluble solids, titratable acidity and dry matter parameters, especially in environments with low precipitation and high solar radiation (20.7 ± 1.7 g 100 g−1 FW, 19.9 ± 2.5 g MA 100 g−1 FW and 0.23 ± 0.2 g 100 g−1 FW respectively). In addition, the results indicate that ICC management showed the highest antioxidant values (1.45 ± 0.19 μg of Trolox equivalent (TE) 100 mg−1 FW), especially in the environment with high precipitation. This study was a useful tool for farmer to choose an effective organic system management in order to obtain fruits with high quality parameters.

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Postharvest quality of strawberry produced during two consecutive seasons

Horticultura Brasileira ◽

10.1590/s0102-05362014000200008 ◽

2014 ◽

Vol 32 (2) ◽

pp. 168-173 ◽

Cited By ~ 8

Author(s):

Marina C Antunes ◽

Francine L Cuquel ◽

Maria AC Zawadneak ◽

Átila F Mogor ◽

Juliano TV Resende

Keyword(s):

Titratable Acidity ◽

Production Costs ◽

Sensory Characteristics ◽

Soluble Solids ◽

Soluble Solids Content ◽

Flesh Firmness ◽

Vitamin Content ◽

Physical Chemical ◽

Solids Content

Maintaining plants in the field for two consecutive crop cycles is one of the latest techniques used by strawberry growers to reduce production costs. The goal of this research was to evaluate the postharvest fruit quality of six strawberry cultivars produced for two consecutive seasons with the same plants. They were planted from May to July 2010 under low-tunnel and fruits were evaluated in two growing seasons (season 1= January, February, and March 2011 and season 2= August, September, and October 2011), totaling three harvests of each cultivar in each year season. Fruits were picked up randomly among 500 plants of each cultivar, organized into five replications of five fruits and kept for three days before analysis under refrigeration (average temperature of 4°C). Variables analyzed were: soluble solids content, titratable acidity, soluble solids content/titratable acidity, flesh firmness, C vitamin content, sensory characteristics (sweetness, flavor, acidity, aroma, shape and flesh firmness), and mineral composition (Ca, Fe, K, Mg, Mn, Cu and Zn). 'Albion', 'Monterey' and 'San Andreas' showed good physical, chemical and sensory characteristics in both seasons. In general, fruits produced during the season 1 showed better physical, chemical and sensory characteristics than fruits produced in season 2. 'Palomar' and 'Portola' were better than the other cultivars concerning C vitamin content in both seasons. 'Palomar' showed higher potassium, calcium, magnesium, manganese and zinc levels, and 'Portola' showed higher calcium and iron levels.

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Physicochemical Characterization and Functional Potential of Phaseolus vulgaris L. and Phaseolus coccineus L. Landrace Green Beans

Agronomy ◽

10.3390/agronomy11040803 ◽

2021 ◽

Vol 11 (4) ◽

pp. 803

Author(s):

Elia Nora Aquino-Bolaños ◽

Alma Karina Garzón-García ◽

Jimena Esther Alba-Jiménez ◽

José Luis Chávez-Servia ◽

Araceli Minerva Vera-Guzmán ◽

...

Keyword(s):

Antioxidant Activity ◽

Physicochemical Characterization ◽

Titratable Acidity ◽

Soluble Solids ◽

Total Phenolic ◽

Green Beans ◽

Total Sugars ◽

Total Soluble Solids ◽

Color Parameters

The green bean is an important crop worldwide, because it is rich in protein, dietary fiber, vitamins, and minerals, as well as bioactive compounds that provide it with important functional properties; however, the composition of many landraces is still unknown. The purpose of this project was to characterize Phaselus vulgaris and coccineus L. landrace green beans on pH, titratable acidity, total soluble solids, total sugars, color parameters, total phenols, monomeric anthocyanins, and in vitro antioxidant activity (DPPH and FRAP). Regarding the content of total sugars, differences were registered between both species, as opposed to results observed in total soluble solids. Color parameters showed higher reddish tones for P. vulgaris landraces, though P. coccineus had a higher total phenolic content, especially the reddish landraces, which correlated directly to a higher antioxidant activity by DPPH and FRAP. In the protein content, the species P. vulgaris registered the highest content. These results could contribute to a greater use and even promote the genetic improvement of the outstanding pods that serve as one of the main food products in rural regions for higher benefits.

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