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Taher MA, Dawood DH, Selim MAE, Amin BH, Elsherbiny EA. Effect of Chitosan/Gum Arabic Blends Enriched by Sodium Nitroprusside or Methyl Salicylate on the Storability and Antioxidant Activity of Tomato Fruit. Polymers (Basel) 2024; 16:1518. [PMID: 38891464 PMCID: PMC11174673 DOI: 10.3390/polym16111518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/18/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
The impact of methyl salicylate (MeSA) or sodium nitroprusside (SNP) in chitosan (CS)/Gum Arabic (GA) mixture on physio-chemical characteristics and antioxidant status during the postharvest ripening of green tomato fruits was studied. CS/GA-MeSA at a 1 mM formulation was the best treatment to retard firmness and titratable acidity (TA) losses. Moreover, this formulation retarded pigmentation progress where it had the lowest significant values of total carotenes (TCs) and lycopene (LYP) contents until the 15th day of the storage period, as well as efficiently faced the rise in malondialdehyde (MDA) levels. Moreover, peroxidase (POD), polyphenol oxidase (PPO), catalase (CAT), and phenylalanine ammonia-lyase (PAL) activities of tomatoes treated with CS/GA-SNP at 2 mM were significantly better than that of control in the primary stages of storage. CS/GA-SNP at a 2 mM formulation showed an extremely high significant content of total polyphenol (TP) in the early stage of storage, while CS/GA and CS/GA-MeSA at 1 and 2 mM accumulated higher significant TP contents than uncoated fruits at the late stage of storage. All formulations were characterized by FTIR spectroscopy. Furthermore, the polymer formulations exhibited strong antifungal activity against Alternaria alternata and Botrytis cinerea as major pathogens of postharvest tomatoes. Transmission electron microscope (TEM) observations for the mycelia of both fungi treated by CS/GA-MeSA at 2 mM revealed serious ultrastructural damage, including distortion of the cell wall and cell membrane and degradation of cytoplasmic organelles.
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Affiliation(s)
- Mohamed A. Taher
- Agricultural Chemistry Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt;
| | - Dawood H. Dawood
- Agricultural Chemistry Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt;
| | - Mohammed A. E. Selim
- Agricultural Microbiology Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt;
| | - Basma H. Amin
- Regional Center for Mycology and Biotechnology (RCMB), Al-Azhar University, Cairo 11651, Egypt;
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Tian F, Wu C, Kou X, Fan G, Li T. Postharvest methyl jasmonate treatment inhibits blue mold decay in Ginkgo biloba seeds by inducing antioxidant and defense systems. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-022-01662-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Hong C, Zhou HC, Zhao YM, Ma H. Ultrasonic washing as an abiotic elicitor to induce the accumulation of phenolics of fresh-cut red cabbages: Effects on storage quality and microbial safety. Front Nutr 2022; 9:1006440. [PMID: 36407509 PMCID: PMC9670152 DOI: 10.3389/fnut.2022.1006440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/17/2022] [Indexed: 03/30/2024] Open
Abstract
Ultrasonic washing has been proved to be an abiotic elicitor to induce the accumulation of phenolics in some fruit and vegetables. However, the feasibility of ultrasonic washing on the accumulation of phenolics in fresh-cut red cabbages has not yet been reported. Therefore, the effects of ultrasonic washing on the phenolics and related phenolic metabolism enzymes of fresh-cut red cabbages, as well as quality and microbial safety during cold storage, were investigated. Firstly, the single-factor tests were used to optimize the ultrasonic processing parameters, including frequency mode, frequency amplitude, power density, frequency cycle time, and ultrasonic washing. Then the activities of the enzymes related to phenolic metabolisms after optimal ultrasound treatment were investigated, including phenylalanine ammonia-lyase (PAL), polyphenol oxidase (PPO), and peroxidase (POD). Additionally, the quality and microbial safety of fresh-cut red cabbages stored at 4°C under the optimal ultrasound treatment were evaluated. The results showed that the content of soluble phenolics (SPs) in fresh-cut red cabbages increased significantly during storage under the optimal conditions (28 ± 2 kHz, 60 W/L, 400 ms, and 20 min) compared with the control (P < 0.05). The PAL activity was activated and the PPO and POD activities were inhibited after ultrasonic washing, which contributed to the increase in the content of SPs. Meanwhile, the storage quality and microbial safety of fresh-cut red cabbages were improved. Ultrasonic washing reduced the weight loss and respiration rate and improved the color and texture characteristics. Additionally, the fresh-cut red cabbages after ultrasonic washing showed more retention of ascorbic acid (AA), total soluble proteins (TSPs), total soluble sugars (TSSs), and total soluble solids (SSs) compared with the control. Finally, ultrasonic washing effectively inhibited the growth of bacteria, molds and yeasts, which is beneficial to the extension of the shelf-life of fresh-cut red cabbages. Therefore, ultrasonic washing can be used as a tool to increase the content of SPs in fresh-cut red cabbages while retaining quality attributes and microbial safety.
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Affiliation(s)
- Chen Hong
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Hong-Chang Zhou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yi-Ming Zhao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Food Physical Processing, Jiangsu University, Zhenjiang, China
| | - Haile Ma
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Food Physical Processing, Jiangsu University, Zhenjiang, China
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Jongman M, Carmichael P, Loeto D, Gomba A. Advances in the use of biocontrol applications in preharvest and postharvest environments: A food safety milestone. J Food Saf 2021. [DOI: 10.1111/jfs.12957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Patricia Carmichael
- Department of Agricultural Research and Specialists Services Malkerns Eswatini
| | - Daniel Loeto
- Department of Biological Sciences University of Botswana Gaborone Botswana
| | - Annancietar Gomba
- National Institute for Occupational Health National Health Laboratory Service Johannesburg South Africa
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The Protective Effect of Digital Financial Inclusion on Agricultural Supply Chain during the COVID-19 Pandemic: Evidence from China. JOURNAL OF THEORETICAL AND APPLIED ELECTRONIC COMMERCE RESEARCH 2021. [DOI: 10.3390/jtaer16070174] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Financial inclusion plays a positive role in protecting agriculture during or after disaster. This paper focuses on the protective effect of digital financial inclusion on the agricultural supply chain and analyzes three mechanisms of the protective effect: financial widening, financial deepening, and financial services digitization. Based on the Gravity Equation, we conduct an empirical study using agricultural logistics and digital financial inclusion data from China. The regression results indicate that a 1% increase in the digital financial inclusion, measured by the Peking University Digital Inclusion Index, increases agricultural trade during the COVID-19 pandemic by approximately 1.6%. Furthermore, heterogeneous protective effects exist between regions in China. Digital financial inclusion is more effective in the Eastern regions in protecting the ASC than in other regions. This paper enriches the understanding of financial inclusion in helping agriculture supply chain recovery.
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Sharma R, Shishodia A, Kamble S, Gunasekaran A, Belhadi A. Agriculture supply chain risks and COVID-19: mitigation strategies and implications for the practitioners. INTERNATIONAL JOURNAL OF LOGISTICS-RESEARCH AND APPLICATIONS 2020. [DOI: 10.1080/13675567.2020.1830049] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Rohit Sharma
- Operations & SCM, National Institute of Industrial Engineering (NITIE), Mumbai, India
| | | | - Sachin Kamble
- Operations and SCM, EDHEC Business School, Roubaix, France
| | - Angappa Gunasekaran
- School of Business and Public Administration, California State University, Bakersfield, CA, USA
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Preharvest Salicylate Treatments Enhance Antioxidant Compounds, Color and Crop Yield in Low Pigmented-Table Grape Cultivars and Preserve Quality Traits during Storage. Antioxidants (Basel) 2020; 9:antiox9090832. [PMID: 32899966 PMCID: PMC7555001 DOI: 10.3390/antiox9090832] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 08/28/2020] [Accepted: 09/04/2020] [Indexed: 01/08/2023] Open
Abstract
Previous reports reported on the effectiveness of preharvest salicylic acid (SA) treatment on increasing fruit quality properties although no information is available about acetyl salicylic acid (ASA) and methyl salicylate (MeSa) treatments. Thus, SA, ASA and MeSa were applied at 1, 5, and 10 mM in 2016 and at 1, 0.1 and 0.01 mM in 2017 to vines of ‘Magenta’ and ‘Crimson’ table grapes. Preharvest salicylate treatments at high concentration, 5 and 10 mM, delayed berry ripening and reduced crop yield, while ripening was accelerated and yield increased at lower concentrations. In addition, SA, ASA, and MeSa treatments, at 1, 0.1, and 0.01 mM, improved berry color due to increased concentration of total and individual anthocyanins, for both cultivars. Quality parameters, and especially, antioxidant bioactive compounds, such as total phenolics and total and individual anthocyanins, were found at higher levels in treated berries at harvest and during prolonged cold storage, the highest effects being found in 0.1 mM MeSa treated table grapes. Overall, it could be concluded that MeSa treatment at 0.1 mM could be the most useful tool to increase bioactive compounds with antioxidant properties in table grape and in turn, their health beneficial properties, with additional effects on increasing crop yield, accelerating on-vine ripening process and maintaining quality traits during prolonged storage.
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García-Pastor ME, Zapata PJ, Castillo S, Martínez-Romero D, Guillén F, Valero D, Serrano M. The Effects of Salicylic Acid and Its Derivatives on Increasing Pomegranate Fruit Quality and Bioactive Compounds at Harvest and During Storage. FRONTIERS IN PLANT SCIENCE 2020; 11:668. [PMID: 32714337 PMCID: PMC7344906 DOI: 10.3389/fpls.2020.00668] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 04/29/2020] [Indexed: 05/03/2023]
Abstract
In the present research two experiments were performed to evaluate the effect of pre-harvest salicylic acid (SA), acetyl salicylic acid (ASA), and methyl salicylate (MeSa), applied as a foliar spray to pomegranate "Mollar de Elche," on crop yield, fruit quality parameters, and bioactive compounds at harvest and during storage. In the 2017 experiment, trees were treated with SA, ASA, and MeSa at 1, 5, and 10 mM and a higher crop yield (kg tree-1 and number of harvested fruit tree-1) and quality parameters (firmness, aril color, and individual sugars and organic acids) at harvest were obtained, as well as a higher concentration of phenolics, anthocyanins, and ascorbic acid. The best results were achieved with 10 mM dose of the three assayed compounds, which was chosen for the 2018 experiment, and results for crop yield and fruit quality attributes were confirmed. These quality traits and the concentration of phenolics, anthocyanins, and ascorbic acid were maintained at higher levels in pomegranate fruit from treated trees than in controls during prolonged storage at 10°C. In addition, the effects of salicylate treatments on increasing total and individual anthocyanin concentration in pomegranate arils led to arils with a deeper red color (Graphical Abstract) and, in turn, fruit that would be more appreciated in the international market. This fact, together with the increased crop yield, would contribute to the increased profit of this crop. Thus, pre-harvest treatment with salicylates, and especially SA at 10 mM concentration, could be a safe, natural, and new tool to improve fruit quality and its content on antioxidant compounds with health beneficial effects (namely, ascorbic acid, phenolics, and anthocyanins) at harvest and during storage.
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Affiliation(s)
| | - Pedro J. Zapata
- Department of Agro-Food Technology, University Miguel Hernández, Orihuela, Spain
| | - Salvador Castillo
- Department of Agro-Food Technology, University Miguel Hernández, Orihuela, Spain
| | | | - Fabián Guillén
- Department of Agro-Food Technology, University Miguel Hernández, Orihuela, Spain
| | - Daniel Valero
- Department of Agro-Food Technology, University Miguel Hernández, Orihuela, Spain
| | - María Serrano
- Department of Applied Biology, University Miguel Hernández, Orihuela, Spain
- *Correspondence: María Serrano,
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Zhang H, Wang R, Wang T, Fang C, Wang J. Methyl salicylate delays peel yellowing of 'Zaosu' pear (Pyrus bretschneideri) during storage by regulating chlorophyll metabolism and maintaining chloroplast ultrastructure. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:4816-4824. [PMID: 30980406 DOI: 10.1002/jsfa.9737] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 03/18/2019] [Accepted: 04/08/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND In some cultivars, yellowing resulting from chlorophyll breakdown has a direct and negative effect on food supply and health. The 'Zaosu' pear (Pyrus bretschneideri Rehd.), a commercial Asian pear cultivar in China, rapidly turns yellow when stored at room temperature after harvest. To develop techniques that delay or suppress chlorophyll degradation, the effects of methyl salicylate (MeSA) on yellowing in 'Zaosu' pear fruit during storage were evaluated. RESULTS Compared with the untreated fruit, the application of 0.05 mmol L-1 MeSA delayed the decline of the total chlorophyll, chlorophyll a and chlorophyll b content, and maintained more intact chloroplasts with fewer and smaller plastoglobuli. Methyl salicylate suppressed enzyme activities, including chlorophyllase, chlorophyll-degrading peroxidase, Mg dechelatase, and pheophytinase, and the expression levels of NYC, NOL, CLH, SGR, PPH, PAO and RCCR in treated fruit. CONCLUSION Methyl salicylate could delay chlorophyll breakdown in the fruit. The results also suggested that the conversion from chlorophyll a to pheophorbide a could proceed via two pathways, and that alternative pathways for the breakdown of chlorophyll a exist in 'Zaosu' pears. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Huaiyu Zhang
- Key Laboratory of Storage and Processing of Plant Agro-Products, College of Biological Science and Engineering, North Minzu University, Yinchuan, China
| | - Rui Wang
- Key Laboratory of Storage and Processing of Plant Agro-Products, College of Biological Science and Engineering, North Minzu University, Yinchuan, China
| | - Tian Wang
- Key Laboratory of Storage and Processing of Plant Agro-Products, College of Biological Science and Engineering, North Minzu University, Yinchuan, China
| | - Chunxia Fang
- Key Laboratory of Storage and Processing of Plant Agro-Products, College of Biological Science and Engineering, North Minzu University, Yinchuan, China
| | - Junjie Wang
- Key Laboratory of Storage and Processing of Plant Agro-Products, College of Biological Science and Engineering, North Minzu University, Yinchuan, China
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Feng L, Zhang M, Adhikari B, Guo Z. Application of high‐pressure argon for improving postharvest quality of cherry tomato. J FOOD PROCESS ENG 2018. [DOI: 10.1111/jfpe.12882] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lei Feng
- State Key Laboratory of Food Science and TechnologyJiangnan University Wuxi Jiangsu China
- International Joint Laboratory on Food SafetyJiangnan University Wuxi Jiangsu China
| | - Min Zhang
- State Key Laboratory of Food Science and TechnologyJiangnan University Wuxi Jiangsu China
- Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and TechnologyJiangnan University Wuxi Jiangsu China
| | - Benu Adhikari
- School of ScienceRMIT University Melbourne Victoria Australia
| | - Zhimei Guo
- Wuxi Haihe Equipment Scientific & Technological Co. Wuxi Jiangsu China
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Martínez-Esplá A, Zapata PJ, Valero D, Martínez-Romero D, Díaz-Mula HM, Serrano M. Preharvest treatments with salicylates enhance nutrient and antioxidant compounds in plum at harvest and after storage. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:2742-2750. [PMID: 29105771 DOI: 10.1002/jsfa.8770] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/31/2017] [Accepted: 10/31/2017] [Indexed: 05/20/2023]
Abstract
BACKGROUND Previous reports have addressed the effectiveness of salicylic acid (SA), acetylsalicylic acid (ASA) and methylsalicylate (MeSA) postharvest treatments on maintaining quality properties during storage in several commodities. However, there is no literature regarding the effect of preharvest treatments with salicylates on plum quality attributes (at harvest or after long-term cold storage), which was evaluated in this research. RESULTS At harvest, weight, firmness, individual organic acids, sugars, phenolics, anthocyanins and total carotenoids were found at higher levels in plums from SA-, ASA- and MeSA-treated trees than in those from controls. During storage, softening, colour changes and acidity losses were delayed in treated fruits as compared to controls. In addition, organic acids and antioxidant compounds were still found at higher levels in treated than in control plums after 40 days of storage. Results show a delay in the postharvest ripening process due to salicylate treatments, which could be attributed to their effect in delaying and decreasing ethylene production. CONCLUSION Preharvest treatment with salicylates could be a safety, eco-friendly and new tool to improve (at harvest) and maintain (during storage) plum quality and especially its content of bioactive compounds with antioxidant properties, increasing the health effects of plum consumption. © 2017 Society of Chemical Industry.
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Affiliation(s)
| | - Pedro J Zapata
- Department of Food Technology, University Miguel Hernández, Orihuela, Alicante, Spain
| | - Daniel Valero
- Department of Food Technology, University Miguel Hernández, Orihuela, Alicante, Spain
| | | | | | - María Serrano
- Department of Applied Biology, University Miguel Hernández, Orihuela, Alicante, Spain
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Glowacz M, Bill M, Tinyane PP, Sivakumar D. Maintaining postharvest quality of cold stored 'Hass' avocados by altering the fatty acids content and composition with the use of natural volatile compounds - methyl jasmonate and methyl salicylate. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:5186-5193. [PMID: 28447342 DOI: 10.1002/jsfa.8400] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 04/23/2017] [Accepted: 04/23/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Low temperatures are often used to reduce metabolic processes and extend the storage life of fruit; however, in the case of avocado, a temperature below 3 °C will often result in the development of physiological disorders associated with chilling injury. The objective of this study was to investigate the ability of methyl jasmonate (MeJA) and methyl salicylate (MeSA) vapours to alleviate chilling injury in 'Hass' avocado fruit kept at 2 °C for 21 days followed by 6-7 days of shelf-life at 20 °C, simulating supply chain conditions. RESULTS The incidence and severity of chilling injury were significantly reduced in MeJA- and MeSA-exposed fruit, especially at 100 µmol L-1 . The mechanism involved improved membrane integrity via alteration of the fatty acid content and composition, down-regulation of LOX gene expression and reduced activity of lipoxygenase. CONCLUSION MeJA and MeSA have the potential for being used with 'Hass' avocado fruit shipped at low temperature to reduce its susceptibility to chilling injury. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Marcin Glowacz
- Natural Resources Institute, University of Greenwich, Chatham, UK
- Postharvest Technology Group, Department of Crop Sciences, Tshwane University of Technology, Pretoria West, South Africa
| | - Malick Bill
- Postharvest Technology Group, Department of Crop Sciences, Tshwane University of Technology, Pretoria West, South Africa
| | - Peter P Tinyane
- Postharvest Technology Group, Department of Crop Sciences, Tshwane University of Technology, Pretoria West, South Africa
| | - Dharini Sivakumar
- Postharvest Technology Group, Department of Crop Sciences, Tshwane University of Technology, Pretoria West, South Africa
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Martínez-Esplá A, Serrano M, Valero D, Martínez-Romero D, Castillo S, Zapata PJ. Enhancement of Antioxidant Systems and Storability of Two Plum Cultivars by Preharvest Treatments with Salicylates. Int J Mol Sci 2017; 18:ijms18091911. [PMID: 28878169 PMCID: PMC5618560 DOI: 10.3390/ijms18091911] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 08/25/2017] [Accepted: 08/31/2017] [Indexed: 01/19/2023] Open
Abstract
In this research the effect of salicylic acid (SA), acetylsalicylic acid (ASA), and methylsalicylate (MeSA) treatments, applied as a foliar spray during on-tree plum development, on fruit quality attributes, bioactive compounds, antioxidant activity, and the activity of the antioxidant enzymes at harvest and after long-term cold storage was evaluated in two plum cultivars (“Black Splendor”, BS, and “Royal Rosa”, RR). At harvest, plum quality parameters, such as weight, total phenolics (including anthocyanins, in BS), total carotenoids, and antioxidant activity, in both hydrophilic and lipophilic compounds were found at higher levels in plums from SA-, ASA-, and MeSA-treated trees than in those from control trees. During storage, fruit firmness, total acidity, and antioxidant compounds were at higher levels in treated, than in control, plums, which show an effect of salicylate treatments on delaying the plum postharvest ripening process. In addition, the activity of the antioxidant enzymes catalase (CAT), peroxidase (POX), superoxide dismutase (SOD), and ascorbate peroxidase (APX) were also enhanced at the time of harvest in salicylate-treated plums as compared with plums from control trees. The activity of these antioxidant enzymes was also found at higher levels in salicylate-treated plums during storage. Thus, preharvest treatment with salicylates could be a safe, eco-friendly, and new tool to improve and maintain plum quality attributes, and especially their content of antioxidant compounds, with an additional effect on delaying the postharvest ripening process through increasing the levels of antioxidant compounds and the activity of the antioxidant enzymes.
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Affiliation(s)
| | - María Serrano
- Department of Applied Biology, University Miguel Hernández, 03312 Orihuela, Spain.
| | - Daniel Valero
- Department of Agro-Food Technology, University Miguel Hernández, 03312 Orihuela, Spain.
| | | | - Salvador Castillo
- Department of Agro-Food Technology, University Miguel Hernández, 03312 Orihuela, Spain.
| | - Pedro J Zapata
- Department of Agro-Food Technology, University Miguel Hernández, 03312 Orihuela, Spain.
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Control of anthracnose disease via increased activity of defence related enzymes in 'Hass' avocado fruit treated with methyl jasmonate and methyl salicylate. Food Chem 2017; 234:163-167. [PMID: 28551220 DOI: 10.1016/j.foodchem.2017.04.063] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 04/06/2017] [Accepted: 04/11/2017] [Indexed: 11/20/2022]
Abstract
Development of anthracnose disease caused by Colletotrichum gloeosporioides Penz. is one of the major issues within the avocado supply chain. Exposure to methyl jasmonate (MeJA) and methyl salicylate (MeSA) vapours at 10 and 100µmoll-1 was investigated as an alternative solution to commercial fungicide - prochloraz® that is currently being used by the industry. The incidence of anthracnose disease was found to be significantly reduced in 'Hass' avocado fruit treated with MeJA or MeSA vapours, especially at 100μmoll-1. The mechanism involved enhanced activity of defence related enzymes, i.e. chitinase, β-1,3-glucanase and PAL, and higher content of epicatechin.
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Exploring the Functions of 9-Lipoxygenase (DkLOX3) in Ultrastructural Changes and Hormonal Stress Response during Persimmon Fruit Storage. Int J Mol Sci 2017; 18:ijms18030589. [PMID: 28294971 PMCID: PMC5372605 DOI: 10.3390/ijms18030589] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 02/21/2017] [Accepted: 02/27/2017] [Indexed: 12/28/2022] Open
Abstract
Lipoxygenase (LOX) initiates the hydroperoxidation of polyunsaturated fatty acids and is involved in multiple physiological processes. In this study, investigation of various microscopic techniques showed that the fruit peel cellular microstructure of the two persimmon cultivars differed after 12 days of storage, resulting in fruit weight loss and an increased number and depth of microcracks. Analysis of subcellular localization revealed that greater amounts of DkLOX3-immunolabelled gold particles accumulated in “Fupingjianshi” than in “Ganmaokui” during storage. In addition, the expression of DkLOX3 was positively up-regulated by abscisic acid (ABA), concomitant with the promotion of ethylene synthesis and loss of firmness, and was suppressed by salicylic acid (SA), concomitant with the maintenance of fruit firmness, inhibition of ethylene production and weight loss. In particular, the expression of DkLOX3 differed from the ethylene trajectory after methyl jasmonate (MeJA) treatment. Furthermore, we isolated a 1105 bp 5′ flanking region of DkLOX3 and the activity of promoter deletion derivatives was induced through various hormonal treatments. Promoter sequence cis-regulatory elements were analysed, and two conserved hormone-responsive elements were found to be essential for responsiveness to hormonal stress. Overall, these results will provide us with new clues for exploring the functions of DkLOX3 in fruit ripening and hormonal stress response.
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