scholarly journals Ripening of ‘Kumagai’ guavas and anthracnose control as affected by methyl jasmonate

Bragantia ◽  
2017 ◽  
Vol 76 (1) ◽  
pp. 167-176
Author(s):  
Barbara Marçon Pereira da Silva ◽  
Raquel Mantovani Binoti ◽  
Patrícia Cia ◽  
Sílvia Regina de Toledo Valentini ◽  
Ilana Urbano Bron
Keyword(s):  
Relative Humidity ◽  
Methyl Jasmonate ◽  
Fruit Ripening ◽  
Ethylene Production ◽  
Colletotrichum Gloeosporioides ◽  
Psidium Guajava ◽  
Defense System ◽  
Ripe Stage ◽  
Air Circulation

ABSTRACT Methyl jasmonate (MJ) is an endogenous regulator that can influence fruit ripening and the defense system against pathogens. This work verified the influence of this regulator on postharvest physiology, control of anthracnose and physicalchemical attributes of ‘Kumagai’ guava (Psidium guajava L.). Guavas harvested at mature-green and ripe stages were treated with 0, 1 and 10 μmol∙L−1 MJ as gas in hermetic containers (200 L) with air circulation for 24 h. Fruit were inoculated with Colletotrichum gloeosporioides spore suspension (105 spores∙mL−1) 24 and 48 h after treatment. During ripening, at 25 °C and 80 – 90% of relative humidity, respiration, ethylene production, anthracnose incidence, severity and quality of guavas were assayed. Data were subjected to analysis of variance and means, compared by Tukey’s test (p ≤ 0.05 and 0.10). The application of 1 and 10 μmol∙L−1 MJ had little influence on ripening of ‘Kumagai’ guava with a slight increase in respiration, ethylene production and yellowing of fruit harvested at ripe stage. Treatments with 1 and 10 μmol∙L−1 MJ did not reduce the severity and incidence of C. gloeosporioides when applied in fruit harvested at ripe and mature-green stages and inoculated 24 or 48 h after MJ treatment. In conclusion, the MJ treatment, at 1 and 10 μmol∙L−1 concentrations, had little influence on ripening and did not control anthracnose in ‘Kumagai’ guavas.

scholarly journals Efficacy of Edible Coatings in Alleviating Shrivel and Maintaining Quality of Japanese Plum (Prunus salicina Lindl.) during Export and Shelf Life Conditions

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1023
Author(s):  
Olaniyi Amos Fawole ◽  
Shannon Claudia Riva ◽  
Umezuruike Linus Opara
Keyword(s):  
Weight Loss ◽  
Relative Humidity ◽  
Shelf Life ◽  
Fruit Ripening ◽  
Gum Arabic ◽  
Edible Coatings ◽  
Long Distance ◽  
Life Conditions ◽  
Prunus Salicina

The effect of six edible coatings were investigated on the ability to alleviate shrivel and extend shelf life of plums. Fruit were subjected to a simulated shipping period (−0.5 ± 2 °C and 90 ± 5% relative humidity (RH)) for five weeks and a subsequent shelf life period (20 ± 2 °C and 80 ± 5% RH) for 20 d. Overall, the study showed that it is possible to alleviate shrivel and also extend shelf life of plum (‘African Delight™’) at export and shelf life conditions. Amongst the edible coatings investigated, the findings in fruit coated with gum arabic and the commercial products were comparable and promising for postharvest preservation of the investigated plum cultivar. The coatings showed a moderate delay of fruit ripening, significantly reduced weight loss and shrivel development, allowing for the export of fruit over a long distance (five weeks) and up to 20 d of shelf life.

scholarly journals Interaction of Water Loss and Fruit Ripening Promote Postharvest Cluster Tomato Fruit Abscission

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 979A-979
Author(s):  
Jeffrey K. Brecht ◽  
Kimberly M. Cordasco
Keyword(s):  
Relative Humidity ◽  
Fruit Ripening ◽  
Water Loss ◽  
Ethylene Production ◽  
Tomato Fruit ◽  
Abscission Zone ◽  
Retail Environment ◽  
Fruit Abscission ◽  
Zone Development ◽  
Exogenous Ethylene

Abscission of cluster tomatoes commonly limits product marketability in the retail environment. Ripening and exogenous ethylene exposure are assumed to play important roles in cluster tomato fruit abscission. `Clarance' and `DRW7229' fruit harvested at either mature green or partially ripened stages did not abscise during storage for 2 weeks at 20 °C and 95% to 100% relative humidity (RH), although respiration and ethylene production indicated that all fruit reached the postclimacteric stage. Exogenous ethylene (1 or 10 ppm) exposure for 8 days at 20 °C and 95% to 100% RH also did not induce fruit abscission for either cultivar, although pedicel and sepal yellowing were observed. Fruit from clusters stored at 20 °C and 20% or 50% RH abscised if sepal shrivel became noticeable before the fruit reached the full red ripeness stage, while no abscission occurred in fruit that reached the full red stage prior to the appearance of sepal shrivel; no fruit stored in 95% to 100% RH abscised. Fruit that ripened prior to the appearance of sepal shrivel were “plugged” (i.e., tissue underlying the stem scar was pulled out) if manual fruit detachment from the pedicel was attempted. These results indicate that there is an interaction of water loss and fruit ripening in promoting abscission zone development in cluster tomatoes.

scholarly journals Ethanol reduces ripening of 'Royal Gala' apples stored in controlled atmosphere

2016 ◽  
Vol 88 (1) ◽  
pp. 403-410 ◽  
Author(s):  
ANDERSON WEBER ◽  
AURI BRACKMANN ◽  
VANDERLEI BOTH ◽  
ELIZANDRA P. PAVANELLO ◽  
ROGERIO O. ANESE ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Ethylene Production ◽  
Acc Oxidase ◽  
Fruit Softening ◽  
Controlled Atmosphere ◽  
Storage Quality ◽  
Ethanol Effect ◽  
Flesh Browning ◽  
Positive Effect

This work aims at evaluate ethanol effect of acetaldehyde application in post-storage quality of 'Royal Gala' apples maintenance, and to compare them with consolidated storage techniques. Thus two experiments were performed during the years of 2008 and 2009. In the first experiment (2008), the application of ethanol, acetaldehyde or 1-MCP and ethylene scrubbing were tested. Fruits were stored in controlled atmosphere (CA) with 1.0kPa O2 and 2.0kPa CO2 at 0.5°C. In the second experiment (2009), the treatments tested were ethanol application combined or not with low relative humidity (LRH) and LRH alone. In this experiment, apples were stored in CA with 1.2kPa O2 + 2.5kPa CO2 at 0.5°C. After eight months of storage, 0.5 mL ethanol kg-1 apples month-1 or 0.25 mL acetaldehyde kg-1 apples month-1 increased mealiness, flesh browning, and decays incidence and reduced flesh firmness. In contrast, 0.3 mL ethanol kg-1 apples month-1, tested on second experiment, prevented fruit softening and decreased ACC oxidase activity and ethylene production. Although lower relative humidity was not efficient in maintaining post-storage quality, it enhanced the positive effect of ethanol application at 0.3 mL kg-1 apples month-1.

scholarly journals Postharvest Ripening and Quality of Guatemalan-West Indian Avocado Hybrids under Simulated Commercial Shipping Temperatures Following Treatment with Aqueous 1-Methylcyclopropene

2015 ◽  
Vol 25 (1) ◽  
pp. 85-89 ◽  
Author(s):  
Adrian D. Berry ◽  
Steven A. Sargent ◽  
Marcio Eduardo Canto Pereira ◽  
Donald J. Huber
Keyword(s):  
Ethylene Production ◽  
West Indian ◽  
Persea Americana ◽  
Control Fruit ◽  
Peel Color ◽  
Hue Angle ◽  
Postharvest Ripening ◽  
Ripe Stage ◽  
Marketable Fruit

Two Guatemalan-West Indian avocado (Persea americana) hybrids (‘Monroe’ and ‘Booth 8’) were treated with an aqueous formulation of 1-methylcyclopropene (1-MCP) to determine effects on ripening and quality during storage simulating commercial shipping temperatures. Fruit harvested at preclimacteric stage were immersed in aqueous 1-MCP at 75 μg·L−1 (1.39 mmol·m−3) or in deionized water for 1 minute, stored at 10 °C for 14 days, and then transferred to 20 °C until ripe. Respiration rate, ethylene production, softening, and change in epidermal hue* angle were delayed and/or suppressed in both cultivars exposed to 1-MCP, although effects were less pronounced with Booth 8. Hue* angles for 1-MCP-treated ‘Monroe’ fruit had the highest values (darkest green peel color) of all treatments at full-ripe stage (hue* angle = 117). For control and treated ‘Monroe’ fruit respiration peaked on days 15 and 21, while ethylene production from both treatments peaked on day 16. Respiration and ethylene production peaked on day 16 for both control and 1-MCP–treated ‘Booth 8’ fruit. Fruit treated with 1-MCP consistently showed diminished respiration and ethylene peaks. Days to full-ripe stage were unaffected by treatment. ‘Booth 8’ fruit from both treatments were considered ripe (15 N whole fruit firmness) after 17 days; however, only 8% of control fruit were marketable, whereas 58% of 1-MCP-treated fruit were marketable, based on subjective appearance ratings using the Jenkins–Wehner score. The development of peel blemishes during storage was the primary cause of unmarketable fruit. ‘Monroe’ control and 1-MCP–treated fruit were soft after about 22 days and were significantly more marketable (control 70% and 1-MCP 85%). Avocados treated with 1-MCP ripened over a longer period than control fruit but maintained a higher percentage of marketable fruit.

scholarly journals AIR TEMPERATURE AND RELATIVE MOISTURE OSCILLATIONS IN RECIFE – PE

2019 ◽  
Vol 9 (1) ◽  
pp. 30
Author(s):  
Manoel Vieira De França ◽  
Romildo Morant de Holanda De Holanda ◽  
Raimundo Mainar De Medeiros
Keyword(s):  
Quality Of Life ◽  
Relative Humidity ◽  
Air Temperature ◽  
Large Scale ◽  
Statistical Parameters ◽  
Thermal Discomfort ◽  
Deviation Coefficient ◽  
Air Circulation ◽  
The City

The objective of this study was to study temperature variability and relative humidity, comparing the 1962-1990 and 1991-2016 periods with the averages of 1931-2016 and 1962-2016, respectively, with the aim of quantifying climate change and identifying the influence Of large-scale El Niño events, aiming to contribute to the managers responsible for urban planning and improving the quality of life of the inhabitants and the ecosystem. Air temperature and relative humidity data provided by the National Institute of Meteorology (INMET) were used. Basic statistical parameters were calculated as: mean, standard deviation, coefficient of variance, variations of annual anomalies in order to identify buoyancy in the data and the influence of extreme events. The city of Recife suffered from disorderly growth, with no specific patterns of planning in urbanization that caused variations in the microclimate of the urbis, causing thermal discomfort and reducing the quality of life of its inhabitants. There is intense flow of automotive vehicles and people throughout the day due to activities related to work, commerce and services, as well as the concentration of various buildings, waterproofed areas as well as buildings, making the local air circulation difficult. It is suggested an increase in green areas from the afforestation that has been shown as an alternative to improve the quality of life in urban spaces.

scholarly journals Effects of NAA, AVG, and 1-MCP on Ethylene Biosynthesis, Preharvest Fruit Drop, Fruit Maturity, and Quality of ‘Golden Supreme’ and ‘Golden Delicious’ Apples

HortScience ◽  
2007 ◽  
Vol 42 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Rongcai Yuan ◽  
David H. Carbaugh
Keyword(s):  
Fruit Ripening ◽  
Ethylene Production ◽  
Ethylene Biosynthesis ◽  
Harvest Date ◽  
Naphthaleneacetic Acid ◽  
Fruit Drop ◽  
Fruit Maturity ◽  
Significant Difference ◽  
Golden Delicious

Effects of naphthaleneacetic acid (NAA), aminoethoxyvinylglycine (AVG), and 1-methylcyclopropene (1-MCP) alone or in combination on fruit ethylene production, preharvest fruit drop, fruit quality, and fruit maturation were examined in ‘Golden Supreme’ and ‘Golden Delicious’ apples (Malus ×domestica Borkh.). In ‘Golden Supreme’ apples, the combination of two applications of AVG and one application of NAA 3 and 1 week, respectively, before the anticipated optimum harvest date synergistically inhibited fruit ethylene production and delayed fruit drop and ripening. Compared with one or two applications of AVG, the combination of one application of AVG and two applications of NAA had much lower preharvest fruit drop, although there was no significant difference in fruit ethylene production among these treatments. In ‘Golden Delicious’ apples, 1-MCP at 396 mg·L−1 had a better effect in delaying fruit drop than did AVG at 125 mg·L−1 or NAA at 20 mg·L−1 when they were applied a week before the optimum harvest date. The combination of NAA and 1-MCP or AVG was more effective in delaying fruit drop than were NAA, 1-MCP, or AVG alone. Fruit ethylene production was inhibited by 1-MCP and AVG but not by NAA. 1-MCP and AVG delayed fruit ripening, whereas NAA increased fruit ripening as determined by fruit firmness and starch.

scholarly journals Ripening pattern of guava cv. Pedro Sato

2012 ◽  
Vol 32 (2) ◽  
pp. 344-350 ◽  
Author(s):  
José Renato de Abreu ◽  
Custódio Donizete dos Santos ◽  
Celeste Maria Patto de Abreu ◽  
Ana Carla Marques Pinheiro ◽  
Angelita Duarte Corrêa
Keyword(s):  
Relative Humidity ◽  
Ethylene Production ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Ethylene Synthesis ◽  
Total Soluble Solids ◽  
Respiration Rates ◽  
Total Titratable Acidity ◽  
Respiration Pattern ◽  
Ripe Stage

Guava is a fruit with high respiration rates and a very short shelf life. Since information on its respiration pattern is contradictory, the objective was to study the changes occurring in the fruit during ripening and to relate them to the respiration behavior of this fruit. Guavas were picked at the half-ripe stage and stored for 8 days at 22 ± 1 ºC and 78 ± 1% relative humidity. The analyses conducted were: peel and pulp coloration, firmness, total soluble solids (TSS), total titratable acidity (TTA), and ethylene production. According to the results, it was verified that the parameters analyzed apparently do not coincide and are ethylene-independent. There was an accentuated ethylene production during ripening, starting from the 4th day. The ethylene synthesis continued increasing up to the 8th day, when the fruits were already decomposing. It was observed that the firmness decreased sharply in the first three days of ripening, and the skin and pulp color changed during ripening. The TSS, total soluble solids, and the TTA, total titratable acidity, practically did not change during the ripening, even with the increased ethylene production. It can be concluded that guava is a fruit that presents characteristics of climacteric and non-climacteric fruits.

scholarly journals Coating Guavas with Cellulose- or Carnauba-based Emulsions Interferes with Postharvest Ripening

HortScience ◽  
1995 ◽  
Vol 30 (2) ◽  
pp. 294-295 ◽  
Author(s):  
Raymond G. McGuire ◽  
Guy J. Hallman
Keyword(s):  
Weight Loss ◽  
Fruit Ripening ◽  
Psidium Guajava ◽  
Soluble Solids ◽  
Solids Concentration ◽  
Postharvest Ripening ◽  
Soluble Solids Concentration

Harvested, mature-green guava (Psidium guajava L.) fruit were coated with cellulose- or carnauba-based emulsions to compare the effect on fruit ripening and quality of ripened fruit. Coatings containing 2% or 4% hydroxypropylcellulose significantly slowed softening an average of 35% or 45%, respectively, compared to uncoated fruit (a delay of 1 to 2 days in September and 4 to 5 days by January). A 5% carnauba formulation slowed softening by 10% to 30% and was most effective at reducing weight loss. Neither of the cellulose- nor the carnauba-based coatings affected the decay susceptibility of softened fruit, but coated fruit did not develop as much color, had a lower soluble solids concentration, and were more prone to surface blackening in storage than uncoated fruit.

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