Effects Of Postharvest Treatments Research Articles

Effect of postharvest treatments on physiological disorders of ‘Galant’: a new scab resistant apple cultivar

Effect of postharvest treatments on physiological disorders of ‘Galant’: a new scab resistant apple cultivar

Effect of postharvest treatments and storage temperature on the physiological, nutritional, and shelf-life of broccoli (Brassica oleracea) microgreens

Microgreens are categorized in the class of ‘super foods’ due to their high content of phytochemical and bioactive compounds. Rapid senescence and short life span are the restrictive parameters for the industrial production and marketing of these immature greens. Hence, there is a need to improve the production and storage conditions of microgreens to magnify postharvest quality, life span, and safety of microgreens, thereby emerging markets. To prolong their shelf life, effect of different postharvest treatments (MAP (modified Atmospheric Packaging) and GRAS chemical treatments) and storage temperature on physiological, nutritional and shelf life of broccoli (Brassica oleracea) microgreens studied. The effect of ascorbic acid + citric acid (0.25 % w/v each) along with MAP conditions (15 % CO2 + 5 % O2 + balanced N2) stored at 5 °C was used for post-harvest quality evaluation of broccoli microgreens. Microgreens treated with an organic acid in high CO2 conditions retained significantly (p < 0.05) higher bioactive compounds in terms of total phenols (1247.68 mg GAE/100 g FW), flavonoids (56.9 mg QE/100 g FW), and chlorophyll (42.12 mg/100 g FW) with better antioxidant activity (44.78 % inhibition). In addition, MAP conditions in the package significantly (p < 0.05) suppressed the weight loss that helped to retain better firmness. The combined effect of organic acids and MAP conditions significantly (p < 0.05) reduced the microbial load with better color quality and higher overall acceptability. The results indicate that post-harvest treatment of ascorbic acid + citric acid along with MAP conditions could be the practical approach to enhance the shelf life of microgreens up to 12 days while maintaining the nutritional quality, to provide avenues for better marketability and commercial gains.

Effect of postharvest treatments on quality and shelf life of mango fruit cv. ‘Cat Chu’ at suboptimal temperature

This research aimed to determine an appropriate postharvest treatment that inhibited decay, maintainedquality, and prolonged the storage life of the ‘Cat Chu’ mango. The mangoes were subjected to hot water diptreatment at 53°C for 5 mins combined with natamycin (1000 ppm), fludioxonil (200 ppm), sodium benzoate(2%), natamycin alone and untreated control. Mangoes were stored at 8°C for 35 days and ripened at 20°C for5 days during the storage period. The results revealed that hot water treatment did not develop white-corkypulp in mango during storage at 8°C for 28 days. Hot water treatment in combination with dipping natamycinenhanced chilling tolerance and reduced decay of mango storage at 8°C for up to 28 days and ripening at 20°C.This combination treatment inhibited the rot of mango and was lower than fludioxonil fungicide during storage.Hence, hot water treatment in combination with natamycin stored at 8°C showed great potential to prolong thestorage life of Cat Chu mango by up to 28 days as a safe altern ative to chemical fungicides.

Effect of post-harvest treatments on shelf life and physico-chemical changes of orange fruits

Effect of post-harvest treatments on shelf life and physico-chemical changes of orange fruits

Effect of Postharvest Treatments on Physiological, Chemical, Microbial and Sensory Qualities of Fruits of Papaya Variety Surya

Background: Papaya is a climacteric fruit which is highly perishable due to rapid ripening and softening and susceptibility to biotic or abiotic stresses, resulting in large losses during storage. Traditionally, people resort to the application of synthetic chemical fungicides on to the crop plant and to the fruits during storage, to control the anthracnose caused by the fungus Colletotrichum gloeosporioides on fruits. But their repeated use has caused resistance in microorganisms and toxicity for humans. Hence, nowadays there has been increasing interest in using natural alternatives instead of chemical treatment. Methods: Fruits of papaya variety Surya collected at fully mature green stage were subjected to different postharvest management practices namely precooling, surface sanitization, treatment with chitosan and were packaged in corrugated fibre board boxes and stored till the end of shelf life under ambient condition. Untreated fruits (control) were also used in the study. Result: Fruits coated with chitosan (1%) registered an improved shelf life of 6.33 days as against 4.33 days in control in ambient storage and it further improved the sensory score for all the organoleptic parameters, after six days of storage. 1% chitosan coating also reported significantly lowest physiological loss in weight (3.51 %), ion leakage (60.47%), total soluble solids (12.13 °Brix), total carotenoids (2.34 mg 100g-1), total sugar (7.26%) and reducing sugar (6.34%) and least disease index (16.67%), bacterial count (22.33 cfu/ml × 106) and fungal count (7.33 cfu/ml × 103) after three days of storage when compared with control.

Effect of Chitosan on Storage Behaviour of Sapota Manilkara achras (Mill) fosberg cv. ‘Kalipatti’

The present study was undertaken to study the effect of chitosan treatments on the storage behaviour of sapota Manilkara achras (Mill) fosberg cv. Kalipatti is stored at ambient temperature. The climacteric rise in sapota fruits shortens the postharvest life and degrades the quality of the fruits. A polysaccharide like a chitosan has been used as an edible coating to extend the storage life of sapota fruits, which is an innovative approach for fruit preservation and sustainable development. Chitosan-based coatings have tremendous potential in several fruits to extend the shelf-life. An investigation was carried out to know the effectiveness of post-harvest treatments with edible coatings (0.5%, 1%, 1.5%, and 2% chitosan) compared with the control. 1% chitosan coating resulted in maximum fruits (more than 75%) having a shelf life of 7 days under ambient condition which was at par with 1.5% chitosan coating. Chitosan coating reduced the physiological losses in weight as compared to the uncoated fruits. The maximum retention of physical parameters such as fruit firmness, specific gravity, colour L*, a* and b* values as well as slow ripening and less spoilage behaviour was observed in chitosan-coated sapota fruits.

Effect of postharvest treatment on physiological disorders of new apple cultivars

Effect of postharvest treatment on physiological disorders of new apple cultivars

Effects of Postharvest Treatment with 1-Naphthaleneacetic Acid on Chlorophyll and Carotenoid Metabolism in Citrus Fruit

Effects of Postharvest Treatment with 1-Naphthaleneacetic Acid on Chlorophyll and Carotenoid Metabolism in Citrus Fruit

Effect of Post-Harvest Treatments on Quality Characteristics of Carrots During Storage

Background: Carrot due to its versatility in culinary uses is considered to be one of the most preferred vegetable. The carrot in Pakistan ranks third among winter vegetables, but due to adoption of improper postharvest techniques and storage, it leads to a great reduction in its quality.&#x0D; Objective: The study was carried out to assess the effect of different treatments on quality characteristics of carrot.&#x0D; Methodology: The study was carried out at the Laboratory of Farm Structures, Sindh Agriculture University Tandojam, Pakistan. Freshly harvested mature carrots free from damage and fungal attack were obtained from field. The carrot samples were subjected to different post-harvest treatments i.e. 40 ºC hot water dip for 2 minutes, 50 ºC hot water dip for 2 minutes, 0.4% concentration of calcium chloride (CaCl2) dip for 2 minutes and tap water.&#x0D; Results: The results revealed that moisture content and firmness decreased with increasing storage duration, whereas weight loss, fungal incidence and total soluble solids increased with increasing storage duration. The carrots treated with 0.4% concentration of CaCl2 dip for 2 minutes had maximum moisture content (78.32%) and firmness (4.12 lbs), with minimum weight loss (41.33%), fungal incidence (38.14%) and total soluble solids (10.43%), followed by 40 ºC hot water dip for 2 minutes, 50 ºC hot water dip for 2 minutes and tap water.&#x0D; Conclusion: The carrots treated with 0.4% concentration of CaCl2 dip for 2 minutes showed better quality characteristics at the end of storage. The adoption of this treatment should therefore be encouraged in the developing countries for extending the quality characteristics of carrots.

Effect of postharvest treatments on the shelf life of two mango cultivars

Effect of postharvest treatments on the shelf life of two mango cultivars

Effect of Postharvest Treatment with 24-Epibrassinolide and Fennel (Foeniculum vulgare) Essential Oil on Quality Attributes and Storage Life of Orange (Citrus sinensis cv. ‘Valencia’)

Effect of Postharvest Treatment with 24-Epibrassinolide and Fennel (Foeniculum vulgare) Essential Oil on Quality Attributes and Storage Life of Orange (Citrus sinensis cv. ‘Valencia’)

Effect of Postharvest Treatments on Biochemical and Bioactive Compounds of Custard Apple (Annona Squamosa L.) Cv. Balanagar

ABSTRACT An experiment was conducted to find out the effects of various postharvest treatments on the biochemical and bioactive compounds of custard apple cv. Balanagar fruits. In the present experiment, three chemicals viz. oxalic acid (OA) (2.5 mM, 5.0 mM, 7.5 mM, and 10 mM; salicylic acid (SA) (0.5 mM, 1.0 mM, 1.5 mM, and 2.0 mM) and Sodium Nitro Prusside (SNP) at 0.5 mM, 1.0 mM, 1.5 mM, and 2.0 mM along with control were applied. Fruits were stored at ambient condition (Temp. 25 ± 2°C and relative humidity (RH) 44 ± 2%). Results indicated that fruits treated with SNP (2.0 mM) had significantly (p≤ 0.05) higher total soluble solids (30.80°B), titratable acidity (TA) (0.33%) and retained higher total sugar content (TS) (25.09%) at the end of the 9th day of storage. At the end of storage, the least reduction in total phenol content (TPC) (492.52 mg gallic acid equivalent (GAE)/100 g (11.62%) was found in SNP (2.0 mM) treated fruits. Likewise, SNP (2.0 mM) significantly (p≤ 0.05) retained higher ascorbic acid (AA) (43.20 mg/100 g), antioxidant activity (AOX) (0.92 µmol Trolox Equivalent (TE)/g), total flavonoids (TF) (71.49 µg CE/100 g) and tannin content (TC) (1.28 mg/g) compared to control during 9 days of storage. Thus, in the present investigation, SNP treatment was most suited to preserve the nutritional quality and bioactive compounds.

Effects of Species, Post-Harvest Treatment, and Roasting on Fibre, Volatile Compounds, and Polyphenol Contents in Coffee Silverskin.

Although coffee silverskin (CS) has recently been used as a food ingredient, no knowledge has been reported on the effects of species or different post-harvest treatments on its chemical composition. Therefore, the fibre, volatile compounds, phenolic acid content, and antioxidant capacity of CS samples obtained at three roasting intensities (light, medium, and dark) from the Coffea arabica and C. canephora species, each subjected to a washing or a sun-drying (“natural”) post-harvest treatment, were studied. Obtained results showed that the chemical composition of CS is due to species, roasting, post-harvest treatment, and interaction. In particular, natural Arabica CS showed the highest content of volatile compounds of Maillard and varietal origin, whereas washed Arabica CS showed the highest content of soluble dietary fibre and chlorogenic derivatives. Pyrroles, sulphur compounds, and pyridines contents were higher in Canephora CS than in Arabica CS. The dark-roasted washed Arabica CS showed the highest content of 5-O- and 3-O-caffeoylquinic acids, while the natural Arabica CS highlighted the highest antioxidant capacity. The effect of post-harvest treatments seemed to be emphasised in Arabica CS, independent of roasting, which did not significantly affect the antioxidant capacity of CS from either species.

Effects of postharvest treatment with pullulan, calcium chloride, and chitosan on quality and sugar metabolism of Annona squamosa during storage

In this study, the effects of postharvest treatment with 1% pullulan, 2% calcium chloride, and 1% chitosan on the physiological and biochemical properties, enzymatic activities and the differentially expressed genes (DEGs) with sucrose metabolism of Annona squamosa L. fruits stored at 15 ± 1°C for 12 days were investigated. Exogenous substances treatment retained a higher level of firmness, surface color, total soluble solids, organic acids, and tvolatile flavor substances compared to the control fruit. Exogenous substances treatments, particularly calcium chloride, enhanced sucrose phosphate synthase activity, whereas it inhibited acid invertase (AI) and neutral invertase (NI) activities. These changes in enzyme activities together resulted in a significantly higher sucrose content and lower glucose and fructose contents. The number (1550 genes), proportion (6.46%), and expression levels of DEGs in the calcium chloride-treated fruit, which was enriched in the starch and sucrose metabolism pathways, were all significantly higher than in chitosan treatment. The findings indicated that exogenous calcium chloride might alter sucrose metabolism during fruit ripening by regulating the enzymatic activities and metabolism pathway. This will provide a theoretical basis for further research on the regulation of sugar metabolism by exogenous substances treatment to solve the problem of quality degradation in the storage of A. squamosa. Novelty impact statement This study indicated that the application of chitosan, pullulan, or calcium chloride, especially calcium chloride treatment, can effectively maintain the quality of Annona squamosa fruit during storage. It was found that exogenous calcium chloride might alter sucrose metabolism during fruit ripening by regulating the enzymatic activities and metabolism pathway. The results provided a theoretical basis for exploring the mechanism of exogenous substances for maintaining the postharvest quality and enhancing the shelf life of A. squamosa fruit in further research.

Comparative effects of gibberellic acid, salicylic acid and Bacillus subtilis on oxidative stress marker and antioxidant potential of Musa sapientum Linn

Banana (Musa sapientum) as a major fruit is widely cultivated for its nutritional and therapeutic properties. Thus, to avoid wastage, there is a need to increase its shelf life. In this study, banana fruits were dipped into the solutions of salicylic acid (SA), gibberellic acid (GA3), Bacillus subtilis (BS) and BS with SA or GA3, respectively, and control in distilled water. The SA, GA3 and BS effects on postharvest treatment of banana was investigated at 0, 3 and 6 day. This study compared the effects of GA3, SA or BS and their combined treatment on antioxidant properties of banana. The results showed that the use of GA3, SA and BS individually or in combination significantly (p ≤ .05) increased the antioxidant properties of the fruits. Decreased titratable acidity and weight loss in the treated groups show the effectiveness of postharvest treatments. Therefore, the results of (GA3 and BS) combined effect is a promising postharvest treatment for banana fruits.

The regulation of 1-methylcyclopropene treatment on the subfamily genes expression of ethylene response factors in peaches during storage.

Ethylene response factors (ERFs) perform diverse functions in fruit development, ripening and senescence. However, the effects of postharvest treatments on ERF genes have not been widely investigated due to the lack of peach ERF genomic information. The aim of this study was to investigate the ERF genes' expression of freshly harvested peach during storage after 1-methylcyclopropene (1-MCP) treatment. 10 μL L-1 1-MCP was used to fumigate peaches. Treated peaches and control peaches were stored at 20°C for 9 days. Fruit firmness, ethylene production and the transcript abundance of ERFs were evaluated during storage. 127 AP2/ERF genes were identified genome using RNA-sequencing (RNA-seq). Expression profiles of 39 ERF genes were considered at day 0, 3, 5 and 7. Results showed that 1-MCP inhibited some ERF genes' expression (e.g., Prupe.5G117800), some genes were generally up-regulated responding to 1-MCP (e.g., Prupe.6G039700), while the other ERF genes displayed no significant difference between the two groups (e.g., Prupe.1G130300). These data revealed that peach ERF genes perform diverse functions during fruit growth, ripening and senescence. The different responses of ERF genes to postharvest 1-MCP treatment may be useful to understand the roles of ethylene and ERF genes in controlling technological aspects of postharvest peach conservation.

EFFECT OF POST HARVEST TREATMENTS ON BIOCHEMICAL CHANGES OF MANGO CV. KESAR FRUIT DURING STORAGE

Effect of post harvest treatments on biochemical changes of mango (cv. kesar) fruit during storage. S. A. PATIL, Department of Horticulture, Yeshwant Mahavidyalaya, Nanded 431602 ABSTRACT: An experiment was carried out with a view to find out the effect of post harvest treatments on biochemical changes for maintaining quality mango of fruits, under the influence of various 12 treatments. Matured freshly harvested mango fruits of uniform size were treated with different treatments and kept for drying under shade for 30 minutes at ambient temperature (35 ± 2 C) in Corrugated Fibre Board (CFB) boxes. The quality of fruits was improved by various growth regulator treatments. The fruits treated with Ethrel increases TSS, reducing sugar, total sugar at initial stage of storage. While GA3 increased TSS, reducing sugar, total sugar and acidity at later stage of storage. Neem leaf extract 10% recorded maximum ascorbic acid content. The treatment Ethrel 500 ppm is most beneficial for ripening, quality and early marketability, however GA3 250 ppm is better for increasing shelf life, quality and marketability of fruits as post harvest treatments before storage.

Natural Biostimulants Elicit Plant Immune System in an Integrated Management Strategy of the Postharvest Green Mold of Orange Fruits Incited by Penicillium digitatum.

This study was aimed at testing the integrated use of a natural biostimulant based on seaweed (Ascophyllum nodosum) and plant (alfalfa and sugarcane) extracts and reduced dosages of the conventional synthetic fungicide Imazalil (IMZ) to manage postharvest rots of orange fruits. The following aspects were investigated: (i) the effectiveness of postharvest treatment with natural biostimulant alone or in mixture with IMZ at a reduced dose against green mold caused by Penicillium digitatum; (ii) the differential expression of defense genes in orange fruits treated with the natural biostimulant both alone and in combination with a reduced dose of IMZ; (iii) the persistence of the inhibitory activity of both biostimulant and the mixture biostimulant/IMZ against green mold; and (iv) the residue level of fungicide in citrus peel when applied alone or in combination with the biostimulant. Treatments with the chemical plant resistance-inducer potassium phosphite, alone or with a reduced dose of IMZ, were included for comparison. The mixture of natural biostimulant and IMZ at a low dose consistently reduced the incidence and severity of fruit green mold and induced a significant increase of the expression level of β-1,3-glucanase-, peroxidase (PEROX)-, and phenylalanine ammonia-lyase (PAL)-encoding genes in fruit peel, suggesting that the natural biostimulant elicits a long-lasting resistance of citrus fruits to infections by P. digitatum. Interestingly, the residual concentration of IMZ in fruits treated with the biostimulant/fungicide mixture was significantly lower than that of IMZ in fruits treated only with the fungicide at the same dose and by far below the threshold values set by the European Union. This study laid the foundations for (i) conceiving a practical and more eco-friendly alternative to the conventional postharvest management of green mold of citrus fruits, based almost exclusively on the use of synthetic fungicide IMZ, alone or mixed with potassium phosphite and (ii) providing a better insight into the mechanisms of disease resistance induction by biostimulants.

The Effects of Post-Harvest Treatments on the Quality of Agastache aurantiaca Edible Flowers

Agastache spp. are used as ornamental plants for their pleasant aroma and the different colors of flowers. Nowadays, their edible flowers have become attractive for their nutraceutical properties. Post-harvest treatment appears as a crucial point to avoid impairment of the nutraceutical compounds and aroma, so different treatments were tested to analyze their effect on the bioactive metabolites and volatilome. Results indicated that freeze-drying was the best solution to prolong the shelf life of these flowers. The use of high temperatures (50, 60, 70 °C) led to altered the composition of antioxidant compounds (phenolic compounds, flavonoids, anthocyanins, carotenoids). Air-drying at 30 °C was a reasonable method, even though time consuming. Concerning the aroma profile, all samples were dominated by oxygenated monoterpene compounds. Pulegone was the main or one of the major constituents of all samples together with p-menthone. Gas Chromatography-Mass Spectrometry results showed a correlation between the temperature and the number of identified compounds. Both fresh and freeze-dried samples evidenced a lesser number (10 and 19, respectively); when the temperature raised, the number of identified constituents increased. Statistical analyses highlighted significant differences between almost all aromatic compounds, even if both Principal Component and Hierarchical Cluster analyses differed at 60 and 70 °C and from the other treatments.

Drying methods and structure-activity relationships of hydroxycinnamic acid derivatives in Idesia polycarpa Maxim. Leaves.

Idesia polycarpa Maxim. leaves are an excellent source of hydroxycinnamic acid derivatives and have drawn special attention due to their various biological activities. However, the effects of post-harvest treatment on the structure-activity relationships of hydroxycinnamic acid derivatives in leaves of I. polycarpa are still unknown. In the current study, we compared the contents of unstable compounds in leaves with four drying methods, namely sun-drying, freeze-drying, shade-drying, and oven-drying. We found that the four hydroxycinnamic acid derivative isomers of leaves were significantly affected after drying processing with four different drying methods. Consequently, the underlying mechanisms responsible for the variation of these compounds during the drying processes have been well elucidated: UV lighting induced the isomerization of 1-[(6'-O-(E)-p-coumaroyl)-β-d-glucopyranosyl]-oxy-2-phenol (1) and 1-[(4'-O-(E)-p-coumaroyl)-β-d-glucopyranosyl]-oxy-2-phenol (3) into 1-[(6'-O-(Z)-p-coumaroyl)-β-d-glucopyranosyl]-oxy-2-phenol (2) and 1-[(4'-O-(Z)-p-coumaroyl)-β-d-glucopyranosyl]-oxy-2-phenol (4). Also, heat (exceeding 20 °C) led to the rearrangement of the (E/Z)-p-coumaric acid moiety of compounds 3 and 4, of which the 4-O-acylglucoses changed into the 6-O-acylglucoses to generate compounds 1 and 2, respectively. Interestingly, the hepatocyte-free fatty acid accumulation in OA-induced steatosis-conditioned HepG2 cells decreased by 65.00%, 10.69%, and 47.00%, respectively, following treatment with compounds 2, 3 and 4, and compound 1 presented no lipid-lowering activity. In addition, the bioactivities of compounds 2 and 4 were substantially enhanced by 58.42% and 25.33% with the sun-drying method compared to the freeze-dying methods. Our study suggests that sun-drying processing is the best method among the four drying processing methods of I. polycarpa Maxim. leaves.