Mushrooms support the Irish economy, with a farm gate value of roughly EUR 130 million in 2022 and with 80%–85% of Irish production exported to the United Kingdom. In order to apply cutting edge technologies and offer creative solutions to increase the shelf life of mushrooms, it is essential to understand the mechanisms of action and preservation effects of the current trends in edible mushroom packaging systems. This review summarises the mechanisms of action for nanopackaging, biodegradable packaging, edible coatings, modified atmosphere packaging (MAP), and active packaging in terms of their enzyme activity, antimicrobial activity, antioxidant activity, and rate of respiration along with the changes in texture, colour, nutritional value, and shelf life of mushrooms reflected in the preservation effects of these packaging systems. SWOT analysis highlights the strengths, weaknesses, and threats of these packaging systems and provides potential opportunities for trialing innovative packaging materials for fresh edible mushrooms in Ireland.

Government and corporate policies have mandated a reduction in plastic packaging to combat issues of waste and climate change. This move towards sustainable packaging alternatives in the fresh food sector will increase costs for consumers. Much of the present research finds consumers are willing to pay more for sustainability, but their willingness to pay (WTP) does not align with real-world purchases, representing an attitude–behaviour gap. To combat this gap, it is posited that consumers’ current purchasing- and sustainability-related behaviours will meaningfully correlate with their WTP and bridge the attitude–behaviour gap. This research used an online survey (n = 476) to gauge consumers’ attitudes and behaviours regarding sustainability as it relates to packaging, biofortification, and WTP in the fresh leafy greens sector. Using binary logistic regression, this research finds that price- and sustainability-related purchasing habits and attitudes towards sustainable packaging meaningfully narrow the attitude–behaviour gap, but organic purchasing habits, waste segregation habits, and sustainability literacy do not. This research contributes the knowledge that, for environmentally friendly leafy greens, past price- and sustainability-related purchasing behaviour should be used instead of merely attitudes as an indication of WTP.

A crop pretreatment with silicon was combined with passive modified atmosphere packaging (PMAP) in a thermoformed recycled PET packaging format as a novel approach to minimize the quality degradation in mushrooms. This study was aimed to evaluate the effects of (a) two preharvest treatments, namely preharvest control (PHTC) and preharvest silicon treatment (PHTS) and (b) four packaging lid formats, namely PMAP1: a single hole of 1.1 mm size, PMAP2: two holes of 0.53 mm size, PMAP3: three holes of 0.53 mm size, and PMAPC: OMNI-PW micro perforated cling film as a control on the quality and shelf life of mushrooms during five days of storage at 4 °C and 99.9% RH. The results of the analysis of variance showed that packaging type, storage days, and the double interaction effects of storage days × packaging type had significant effects (p < 0.0001) on the changes in O₂, CO₂, colour L* and a* values, ΔE, total soluble solids (TSS), and the density of mushrooms. Density, electrolyte leakage (EL), and TSS were significantly affected by the double interaction effects of preharvest treatment × packaging type. Overall, PMAP1, PMAP2, and PMAP3 resulted in lower O₂ + higher CO₂ within packages compared with the conventional control. A preharvest silicon treatment had little overall effect. PMAP 1, 2 and 3 had a significantly lower ΔE (=better quality) after 5 days storage compared to PMAPC which had the highest ΔE (lowest quality) overall. PMAP1 and PMAP2 had the lowest EL values compared to PMAP3 and PMAPC. PMAP1, PMAP2, and PMAP3 all gave better TSS levels and density compared to PMAPC. Notably, this study proved that a perforation-mediated MAP design for mushrooms packaged in a thermoformed recycled PET packaging format maintained improved CO₂, lowered O₂, and reduced EL while maintaining TSS and the density of the mushrooms during the storage period.

This research builds a mathematical modelling to assess food waste production when designing sustainable packaging solutions integrated with an agricultural intervention in kale production. The model utilizes experimental data obtained from simulated retail and distribution storage conditions to assess the probability of the product to be found out of technical specification and becoming waste. The packaging design was made using a system of differential equations describing the gas exchanges inside the packaging. The waste was estimated fitting linear mixed effect models to the postharvest experimental data, accounting for the variability between and within groups. A field experiment with kale treated with silicon during growth as a bio stimulant was used with the aim to make the product more resilient to packaging conditions. The Kale was then packaged in polylactic acid and oriented polypropylene for postharvest testing. Technological thresholds that indicate out-of- specification product were used to estimate the percentage of product that would likely end up as food waste. In total 7.2% of the product was found to be out of specification with the PLA film after 7 days. Silicon treatment was able to reduce this value to negligible, demonstrating the ability of agricultural interventions to facilitate sustainable packaging and reducing food waste in horticultural products.

Silicon (Si) has been proposed as a crop biostimulant owing to its ability to mitigate biotic and abiotic stresses, but its efficacy depends on its soil bioavailability. This study linked Si bioavailability with plant growth responses upon Si supplementation in agricultural soils. Silicon sorption was quantified in seven agricultural soils and model soil constituents, and bioavailable Si was determined in soil solutions from non-supplemented and Si-supplemented soils. Short-term plant bioassays with Lactuca sativa and Eruca sativa assessed early growth responses in water, soil extracts, and pot experiments. Endogenous bioavailable Si was related to pH, sand, and carbonate content, whereas exogenous Si sorption was associated with pH, silt, and oxalate-extractable Fe. The biostimulatory effect of Si in water was species-dependent: Lactuca sativa responded through increased secondary root formation, whereas Eruca sativa was highly sensitive in shoot biomass, with half-maximal effective concentration (EC₅₀) values in the range of 8–12 mg Si L⁻¹. In extracts of soils with low available Si, responses were species- and soil-dependent, and in soil pot bioassays, exogenous Si enhanced Eruca sativa biomass, consistent with the fraction of Si remaining bioavailable in the soil solution. These findings identify key factors governing Si bioavailability, illustrate how different soil–species combinations influence early Si responses, and provide a basis for the broader field studies required to confirm their agronomic relevance.