Targeted supply chain ethylene removal to control the development of fresh produce

Lead Research Organisation: University of Nottingham
Department Name: Sch of Biosciences

Abstract

The overarching aim of the project is to control the scheduling of the UK tomato and peppers by suspending ripening at optimum eating quality for grower and retail postharvest supply chain environments. In an industry with a combined value of £957m / year, the potential to market a higher proportion of UK produced tomatoes and peppers represents a 5% increase or £49m /year opportunity for growers and increased revenue for the retailers. Reduced energy use by improving storage and increased shelf life at ambient conditions to increase the availability of high quality UK produce will better meet the requirements of retailers and consumers. The removal of ethylene in post-harvest environments after the onset of ripening, will develop a new area of investigation to extend shelf life. The project team, by a combination of laboratory and on site commercial scale investigations, will develop a robust evidence base to implement new ethylene control technology.

Technical Summary

The overarching aim of the project is to control the scheduling of the UK tomato and peppers by suspending ripening at optimum eating quality for grower and retail postharvest supply chain environments. In an industry with a combined value of £957m / year, the potential to market a higher proportion of UK produced tomatoes and peppers represents a 5% increase or £49m /year opportunity for growers and increased revenue for the retailers. Reduced energy use by improving storage and increased shelf life at ambient conditions to increase the availability of high quality UK produce will better meet the requirements of retailers and consumers. The removal of ethylene in post-harvest environments after the onset of ripening, will develop a new area of investigation to extend shelf life. The project team, by a combination of laboratory and on site commercial scale investigations, will develop a robust evidence base to implement new ethylene control technology.

Planned Impact

Who will benefit from this research?
Beneficiaries of the research will include UK retailers, British growers, the consumer and the UK Government. There will be additional benefits to UK R+D, skills and trade competitiveness. The project is designed specifically to engage with UK-based industry and to operate within the entire fresh produce supply chain, from primary producer through to retail environment. The project will develop and exploit knowledge about the mode of ethylene biosynthesis and action to significantly enhance current commercial practice for extending the shelf life of tomato and pepper. Examples of the latter could include growers and retailers of a wide range of fresh produce, including the extension of the shelf life of fresh vegetables and cut flowers. The wider public will benefit from improved quality products with longer shelf life. In addition the consortium involves colleagues at ADAS and the wider industry consortium to host grower workshops and communicate the outputs of the excellent bioscience to assist immediate assimilation of the wider benefits of the research.
How will they benefit from this research?
There will be direct benefit to UK growers and the retailers and the technology can be put into commercial practice as soon as validated under commercial conditions. It will result in a more equitable supply of fruit will reduce the need for promotions and reduce consumer waste. This is because any perturbation in the supply chain represents a 'glut' or undersupply; whilst oversupply can lead to product price reduction, a lack of produce invariably creates the opportunity for import substitution. The ethylene Fresh+ removal approach, aims to 'suspend' ripening for tomato and pepper at optimal eating quality within the supply chain environments from pack house through to in store retail. Substantial economic benefits would be expected. The value of the UK fresh tomato and pepper markets are respectively £600 and £387m / year with 25% market share occupied by UK production. Improving the consistency of the flow of fruits from harvest to the consumer will smooth the supply chain and contribute at least an extra 5% total market value (an increase in the average value per Kg of product) or £49m / year (£245m over 5 years) to the UK tomato and pepper growers and potentially increase sales revenue to the retailers for UK sourced produce. The treatment should also be applicable to other crops such as field vegetables (UK market £1.1 billion) and non food products such as cut flowers (UK market value £0.8 billion). The guidelines produced, will constitute an important step forward in the development of a strategy to grow and sustain profitable UK sourced fresh tomato and pepper products.
There will be environmental benefits. Reducing waste will reduce energy inputs per Kg of fresh produce. This will decrease energy costs for processing and transporting fresh food in the supply chain. Smoothing out the supply of fresh products will allow the industry to meet the demand of consumers to include an increasing proportion of fresh produce in their diet.
The benefits to the UK also include training of a researcher through a project that encompasses both science discovery and delivery of knowledge into commercial practice. The researcher on the project will be in close contact with the major tomato growers in the UK. This will provide invaluable experience of working with leading businesses in the UK horticulture sector. The project will also help strengthen the links between growers, academics and colleagues at ADAS.

Publications

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Wang D (2018) Fruit Softening: Revisiting the Role of Pectin. in Trends in plant science

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Wang D (2023) Elucidating the role of SlXTH5 in tomato fruit softening in Horticultural Plant Journal

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Wang D (2017) Tomato Flavor: Lost and Found? in Molecular plant

 
Description Ripening and other postharvest changes in horticultural products can be strongly influenced by concentrations of ethylene in the atmosphere. During this project we discovered that using a photocatalytic oxidation (PCO) ethylene scrubber in the postharvest storage environment extended the shelf life of tomato (Solanum lycopersicum) fruits by at least 4 days under commercial conditions. This is a ripening technology breakthrough that could dramatically reduce supply chain waste. The low ethylene environment acted to 'suspend' ripening, even when tomato fruits were placed in stored in a red ripe condition. The low ethylene environment also improved water retention and reduced fruit drop from the vine. The fruit from the low ethylene storage environments exhibited no detrimental effects on flavour. The experiments demonstrated that shelf life of ripe fruit could be extended in postharvest storage temperatures up to 16oC. Laboratory experiments indicated that the ethylene scrubbing had an effect on the expression of genes involved in fruit ripening including those that control the softening process such as pectate lyase.
The project was able to meet its scientific objectives of testing the ability of low ethylene environments to extend tomato storage life and provided recommendations to UK growers. Whilst the technology was proven to extend shelf life in tomato, the technology is be developed in commercial stores for a range of produce, such as brassica and selected fruit.
The most significant benefits from the ethylene scrubbing technology may be realised in environments where shelf life of produce is very limited. These would include in countries with high ambient temperatures, where access to refrigerated storage environments prior to sale is limited. This work will now be taken forward in a new Innovate Project: Pick, Store, Buy: Shelf life extension and reduced waste for tomato production in Nigeria.
Nigeria is the 14th largest tomato producer in the world and the largest in West Africa, with 48 million, predominantly, smallholder growers (<0.15 Ha plot size) cultivating 1.8 million tonnes of tomatoes every year. However, 50% or 0.9 million tonnes of tomatoes rot and never reach consumers or processors; this situation is exacerbated by population demand of 2.5 million tonnes and leaves Nigeria with an annual supply deficit of 1.6 million tonnes. Import substitution, supply chain losses and price hikes because of poor availability, currently costs Nigeria, $15 billion per year. Drawing on our discoveries in the previous project using PCO technology, the new research will develop a shelf life extension and prediction tool to support critical business decisions and improve the accurate flow of fresh produce to the customer. It should increase revenue to the supply base, help alleviate poverty and create new higher skilled jobs for the agri-food sector in Nigeria using technology developed and manufactured in the UK. The project has started and is on-going.
Exploitation Route It is expected that various sectors of the UK horticulture industry will be able to use the technology to improve post-harvest quality. This is already happening for a range of produce, such as brassica and selected fruit.
Sectors Agriculture, Food and Drink

 
Description The aim of the project was to assess the potential of novel ethylene removal technology to improve quality and shelf life of tomato fruits. The work is complete and the technology looks to have considerable promise and has been taken up by certain areas of the horticulture industry. A grower booklet has been produced. The experimental work on the project demonstrated that a low ethylene environment acted to 'suspend' ripening, even when tomato fruits were placed in stored in a red ripe condition.This is a ripening technology breakthrough that could dramatically reduce supply chain waste. Whilst the technology was proven to extend shelf life in tomato, the technology is be developed in commercial stores for a range of produce, such as brassica and selected fruit. The most likely outcome related to tomato may be the use of the technology to enhance shelf life in environments where ambient temperatures are high and produce postharvest life is very short. We are now extending the technology to tomato storage facilities in the tropics as part of a further new Innovate funded project. A manuscript is now in preparation for publication in an international peer review journal.
Sector Agriculture, Food and Drink
Impact Types Economic

 
Description Interaction with tomato growers in the UK supplying fruits for this project 
Form Of Engagement Activity A formal working group, expert panel or dialogue
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Industry/Business
Results and Impact Discussion of outputs of project research allowing direct changes in protocols for storing and handling tomato fruit in commercial practice. This is all part of the project plan.
Year(s) Of Engagement Activity 2015,2016