Effects of a Combination of 1-MCP, CaCl2 Treatment and Slow Cooling on Postharvest Physiology of ‘Zhonghuashoutao’ Peach during Storage

2012 ◽  
Vol 554-556 ◽  
pp. 1076-1080
Author(s):  
Shi Jie Yan ◽  
Li Ya Liang ◽  
Zhao Chun Ma ◽  
Ru Fu Wang
Keyword(s):  
Respiration Rate ◽  
Ethylene Production ◽  
Chilling Injury ◽  
Physiological Disorder ◽  
Slow Cooling ◽  
Postharvest Physiology ◽  
Cooling Method ◽  
Cacl2 Treatment

Effects of a combination of 1-MCP, CaCl2 treatment and slow cooling on postharvest physiology of ‘Zhonghuashoutao’ peach were investigated. Respiration rate, ethylene production, firmness, juice contents and percentage of good fruit were studied to evaluate the quality of peach. The results showed that 1-MCP, CaCl2 treatment reduced the amount of respiration rate and ethylene production, delayed the appearence of ethylene peak, prolonged softening, restrained the chilling injury of ‘Zhonghuashoutao’ peach after harvest. Slow cooling method had better effect and could delay the incidence of physiological disorder and maintained good quality during storage.

Effects of Different Cooling Methods on Postharvest Physiology of Yali Pears during Ice Temperature Storage

2012 ◽  
Vol 554-556 ◽  
pp. 1072-1075
Author(s):  
Li Ya Liang ◽  
Zhao Jin ◽  
Li Ping Hao ◽  
Shi Jie Yan
Keyword(s):  
Respiration Rate ◽  
Ethylene Production ◽  
Physiological Disorder ◽  
Slow Cooling ◽  
Rapid Cooling ◽  
Postharvest Physiology ◽  
C Storage ◽  
Cooling Methods ◽  
Temperature Storage

The effects of slow and rapid cooling methods on the postharvest physiology of Yali pears during ice temperature (-0.5°C) storage were investigated. Respiration rate, ethylene production, browning index and polyphenol oxidase(PPO) activity were used to evaluate the quality of Yali pears. The results showed that the slow cooling treatment decreased the levels of respiration rate，ethylene production，and PPO activity of Yali pears, and delayed the occurrence of the respiration, ethylene, and PPO activity peak compared to the rapid cooling treatment. The browning indexes of Yali pears with slow cooling treatment were lower than that of rapid cooling treatment. The results indicate that the cooling method may be an important factor affecting the storage quality of Yali pears. The slow cooling can delay the occurrence of physiological disorder during ice temperature storage.

Growth defects and infrared spectra analysis of CePO4single crystals

2005 ◽  
Vol 38 (4) ◽  
pp. 675-677 ◽  
Author(s):  
Kunpeng Wang ◽  
Jianxiu Zhang ◽  
Jiyang Wang ◽  
Changshui Fang ◽  
Wentao Yu ◽  
...  
Keyword(s):  
Slow Cooling ◽  
Spectra Analysis ◽  
X Ray ◽  
Cell Parameters ◽  
Growth Defects ◽  
Cooling Method ◽  
Good Crystalline Quality ◽  
Growth Habits ◽  
Top Seeded Solution Growth

High-quality CePO4single crystals (monazite) were grown by the flux TSSG (top-seeded-solution growth) slow-cooling method. The X-ray powder diffraction pattern shows good crystalline quality of the crystals and the various peaks were assigned. The unit-cell parameters were calculated using theDICVOL90andTERORcomputer programs. The concentrations of all elements in the crystals were measured by electron probe microanalysis. Growth habits were deduced by the Bravais–Friedel Donnay–Harker (BFDH) method and macro-defects in the crystals are discussed. An infrared spectrum of the crystal was recorded in the frequency range of 300 to 1600 cm−1and all vibration frequency peaks were assigned.

scholarly journals ETHANOL AND NITRIC OXIDE IN QUALITY MAINTENANCE OF ‘GALAXY’ APPLES STORED UNDER CONTROLLED ATMOSPHERE

2017 ◽  
Vol 39 (5) ◽  
Author(s):  
AURI BRACKMANN ◽  
VAGNER LUDWIG ◽  
FABIO RODRIGO THEWES ◽  
ROGERIO OLIVEIRA ANESE ◽  
ERANI ELISEU SCHULTZ ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Respiration Rate ◽  
Ethylene Production ◽  
Acc Oxidase ◽  
Acid Oxidase ◽  
Controlled Atmosphere ◽  
Ethylene Concentration ◽  
Flesh Firmness ◽  
Oxidase Enzyme

ABSTRACT The aim of this work was to evaluate the effect of ethanol and two nitric oxide dose applications on the maintenance of the post-storage quality of ‘Galaxy’ apple during storage under controlled atmosphere (CA). Treatments evaluated were: [1] 1.2 kPa O2 + 2.0 kPa CO2; [2] CA + 20 µL L-1 of nitric oxide, [3] CA + 40 µL L-1 of nitric oxide; [4] CA + 1 ml of ethanol kg-1 fruit. Fruits received treatments before storage and were kept under CA during eight months and seven days of storage at 20 °C. Fruits had been kept on CA for eight months and seven days at 20° C. Fruits treated with ethanol showed higher ethylene production, low flesh firmness, high flesh breakdown, mealiness and acetaldehyde production. Fruits treated with 40 µL L-1 nitric oxide showed lower ethylene production, respiration rate and ACC oxidase ( (1-aminocyclopropane-1-carboxylic acid) oxidase enzyme activity. Apples treated with 20 uL L-1 nitric oxide showed higher ethylene production, respiration rate, internal ethylene concentration CO2 and ethanol concentration. Ethanol and nitric oxide application before storage have no benefits in maintaining fruit quality after storage under CA due to lower flesh firmness, higher mealiness incidence, flesh breakdown and decay incidence.

Shelf Life of Fresh Pistachio (Pistacia vera L.) upon Foliar Application of Sulfur as Pesticide

2021 ◽  
Author(s):  
Fatemeh Nazoori ◽  
Elaheh ZamaniBahramabadi ◽  
Seyed Hossein Mirdehghan ◽  
Maryam Afrousheh
Keyword(s):  
Antioxidant Activity ◽  
Respiration Rate ◽  
Ethylene Production ◽  
Phenolic Content ◽  
Foliar Application ◽  
Plant Protection ◽  
Loss Of Weight ◽  
Chemical Pesticides ◽  
Over Time

Abstract Application of sulfur as pesticide is a strategy in plant protection, but it is of great importance for a pesticide not to influence the quality of the product. In this study, movento (0.5 kg/1000 L), confidor (0.4 kg/1000 L) and refinery micronized (R) and mineral (M) sulfur (30 and 60 kg/1000 L in water) were sprayed on pistachio trees of cultivar ‘Ahmadaghaei’ twice (in middle May and after 50 days) for controlling the psylla. Pistachios were harvested in late September and stored in 4 °C for 25 and 50 days in order to evaluate the effect of pesticides on the quality of hulls and kernels. Weight, taste, aroma, appearance, respiration rate, firmness of hull and kernel, phenolic content of kernel, anthocyanin, chlorophyll, carotenoid, a*, b* and chroma of hull and kernel declined over time, while phenolic content of hull, L* and hue of hull and kernel displayed an increasing trend. Antioxidant activity of hulls and kernels and ethylene production remained stable over time. Chemical pesticides stimulated loss of weight and hull firmness. Refinery micronized sulfur at both concentrations caused higher wight loss, higher chlorophyll of hull and kernel, lower carotenoid of hull and kernel, higher L* and hue and lower a*, b* and chroma of hull and kernel (lighter and greener color). All sulfur treatments reduced firmness and antioxidant activity of hull and kernel, while elevated the respiration rate, hull phenolics and hull anthocyanin. R30 saved the taste and aroma after 50 days. R30 and M30 showed higher ethylene production.

Effects of Brassinosteroids on Postharvest Physiology of Horticultural Crops: A Concise Review

2019 ◽  
pp. 62-68
Author(s):  
Sajid Ali ◽  
Muhammad Akbar Anjum ◽  
Aamir Nawaz ◽  
Safina Naz ◽  
Sajjad Hussain ◽  
...  
Keyword(s):  
Chilling Injury ◽  
Membrane Integrity ◽  
Vegetable Crops ◽  
Postharvest Physiology ◽  
Horticultural Crops ◽  
Concise Review ◽  
Inhibit Lipid Peroxidation ◽  
Postharvest Life ◽  
Physiological And Biochemical

Brassinosteroids are natural polyhydroxylated steroidal plant growth regulators or phyto-hormones. These are ubiquitous in plant kingdom and influence a wide variety of molecular, physiological and biochemical responses of plants. Brassinosteroids have also been applied and their possible role has been investigated on postharvest physiology of various horticultural crops. Brassinosteroids regulate ripening of different non-climacteric and climacteric fruits and influence colour metabolism. They inhibit activities of peroxidase and polyphenol oxidase enzymes and delay enzymatic browning. Exogenous application of brassinosteroids inhibits cell wall degradation and delays softening of fruits. In addition, their application regulates sugar and energy metabolism in different fruit and vegetable crops. They suppress lipoxygenase and phospholipase D enzyme activities and conserve higher unsaturated fatty acid contents, suppress electrolyte leakage, inhibit lipid peroxidation and maintain higher membrane integrity eventually leading to suppressed chilling injury during postharvest storage. These alleviate oxidative stress and prolong storage life potential of various horticultural crops. So, the present review summarizes various roles and mechanism of action of brassinosteroids in extending postharvest life and maintaining quality of different horticultural crops.

scholarly journals Effect of Ethylene-Insensitive Mutation etr2b on Postharvest Chilling Injury in Zucchini Fruit

Agriculture ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 532
Author(s):  
Alicia García ◽  
Encarnación Aguado ◽  
Gustavo Cebrián ◽  
Jessica Iglesias ◽  
Jonathan Romero ◽  
...  
Keyword(s):  
Ethylene Production ◽  
Receptor Gene ◽  
Chilling Injury ◽  
Wild Type ◽  
Coding Region ◽  
Mda Content ◽  
Injury Tolerance ◽  
Stress Metabolites ◽  
And Oxidative Stress

Zucchini is a vegetable fruit that is very susceptible to postharvest chilling injury, and fruit ethylene production is correlated with chilling injury sensitivity, such that the more tolerant the cultivar, the lower is its ethylene production. It is expected that zucchini fruit with reduced sensitivity to ethylene would have a higher chilling injury tolerance. In this study, we compared the postharvest fruit quality of wild type and ethylene-insensitive mutant etr2b, in which a mutation was identified in the coding region of the ethylene receptor gene CpETR2B. Flowers from homozygous WT (wt/wt), mutant plants in homozygous (etr2b/etr2b) and heterozygous (wt/etr2b) were hand-pollinated, and all fruits were harvested with the same length, at about 8 days after pollination. After harvesting, fruit of each genotype was randomly divided in 3 batches of 12 fruits each (four replications with three fruits each), and then stored at 4 °C and 95% RH. At 0, 7, and 14 days after cold storage, each batch was used to assess ethylene production, respiration rate, weight and firmness loss, chilling injury, and oxidative stress metabolites. The results showed a lower chilling injury associated with lower cold-induced ethylene production in the mutant fruit, in comparison with the WT fruit. These data demonstrated that the ethylene-insensitive etr2b mutant fruit was more tolerant to chilling injury, confirming that basal ethylene in the still undamaged fruit could function as a modulator of post-harvest chilling injury. Moreover, the higher chilling tolerance of the etr2b mutant fruit was not associated with MDA content, but was concomitant with a reduction in the accumulation of hydrogen peroxide in the refrigerated mutant fruit.

scholarly journals EFFECTS OF INSECTICIDAL LOW-OXYGEN ATMOSPHERES ON POSTHARVEST PHYSIOLOGY AND QUALITY OF STONE FRUITS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1140c-1140
Author(s):  
Dangyang Ke ◽  
Adel A. Kader
Keyword(s):  
Ethylene Production ◽  
Prunus Persica ◽  
Color Change ◽  
Physiological Responses ◽  
Chilling Injury ◽  
Limiting Factor ◽  
Stone Fruits ◽  
Prunus Domestica ◽  
Low Oxygen

Fruits of peach (Prunus persica L., cv. `Fairtime') and plum (Prunus domestica L., cv. `Angeleno') were kept in air and in 0.25% or 0.02% O2 at 0, 5, or 10°C for 3 to 40 days to study the effects of temperatures and insecticidal low O2 atmospheres on their physiological responses and quality attributes. Exposure to low O2 atmospheres reduced respiration and ethylene production rates of the stone fruits. The low O2 treatments retarded color change and flesh softening of plums and maintained acidity of peaches. Exposure to the low O2 atmospheres also delayed incidence and reduced severity of internal breakdown (chilling injury) and decay of the peaches at 5°C and, therefore, maintained both external and internal appearance qualities of the fruits longer than those kept in air. The most important limiting factor for fruit tolerance to insecticidal low O2 atmospheres was development of alcoholic off-flavor which was associated with accumulation of ethanol and acetaldehyde in the fruits. The peaches and plums could tolerate exposures to the low O2 atmospheres for 9 to 40 days, depending on the temperature and O2 level used. These results suggest that stone fruits are quite tolerant to insecticidal low O2 atmospheres.

scholarly journals Alleviation of Postharvest Chilling Injury of Carambola Fruit by γ-aminobutyric Acid: Physiological, Biochemical, and Structural Characterization

2021 ◽  
Vol 8 ◽  
Author(s):  
Francine Ngaffo Mekontso ◽  
Wenhui Duan ◽  
El Hadji Malick Cisse ◽  
Tianye Chen ◽  
Xiangbin Xu
Keyword(s):  
Fatty Acid ◽  
Linolenic Acid ◽  
Chilling Stress ◽  
Chilling Injury ◽  
Caproic Acid ◽  
Aminobutyric Acid ◽  
Lower Activity ◽  
Total Phenolic ◽  
Physiological Disorder

Chilling injury is a physiological disorder affecting the quality of carambola fruit. In the present study, the effect of exogenous γ-aminobutyric acid (GABA) on CI development in carambola fruit during storage at 4°C for 15 days was investigated. The results showed that 2.5-mM GABA reduced CI index, maintained pericarp lightness, and decreased the electrolyte leakage (EL) and malondialdehyde content (MDA) while increased the superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) enzyme activities. Endogenous GABA content was significantly higher in the treated fruit than in the control fruit during the whole storage. Besides, the treatment promoted the accumulation of proline and ascorbic acid (AsA) under chilling stress. Compared to the control, GABA-treated fruit exhibited a higher activity of phenylalanine ammonia-lyase (PAL) and total phenolic compounds, and a lower activity of polyphenol oxidase (PPO). In addition, the Safranin O/fast green staining revealed via microscopic images that the GABA treatment reduced the cell walls degradation of carambola fruit. Moreover, the results displayed a lower activity of phospholipase D (PLD) and lipoxygenase (LOX) enzymes, which coincided with a higher content of oleic acid (C18:1), linoleic acid (C18:2n6), and α-linolenic acid (C18:3n3) after 15 days of treatment, leading to the maintenance of the integrity and prevention of the membrane of the rapid softening of carambola fruit. The findings of the present work showed particularly new insights into the crosstalk between GABA and fatty acids. GABA might preserve the pericarp of carambola fruit by increasing the content of the unsaturated fatty acid (UFA) γ-linolenic acid and reducing the saturated fatty acid (SFA) such as caproic acid (C6:0), caprylic acid (C8:0), myristic acid (C14:0), and palmitic acid (C16:0) progressively. GABA can be used as an appropriate postharvest technology for improving the quality of carambola fruit during low-temperature storage.

scholarly journals INCREASED YIELDS AND ETHYLENE PRODUCTION OF MECHANICALLY STRESSED WITLOOF CHICORY

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1106e-1106
Author(s):  
K.A. Corey ◽  
Zhi Yi Tan
Keyword(s):  
Respiration Rate ◽  
High Temperatures ◽  
Ethylene Production ◽  
Diameter Ratio ◽  
Mechanical Pressure ◽  
Yield And Quality ◽  
Control Respiration ◽  
Physiological Explanation ◽  
Length To Diameter Ratio

Yields and quality of witloof chicory are often low when roots are forced following several months storage or when forced at high temperatures. A technique was developed to improve the yield and quality of the chicons forced hydroponically and a method developed to determine the rates of respiration and ethylene production during the application of the technique. The technique involves the use of a resilient material (polyurethane) combined with the application of pressure to the developing chicons. Marketable yields and density of `Faro' and `Bea' chicons increased with increasing pressure applied. Increasing pressure also resulted in a significant decrease in the length to diameter ratio of chicons, an indicator of improved quality. Mechanical pressure resulted in a 3 to 4 fold greater increase in ethylene production than the control. Respiration rate increased to about twice that of the control after 10 days forcing and thereafter declined slightly. The technique provides a tool for improving economic yields of hydroponically forced witloof chicory. A possible physiological explanation for the technique is provided.

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