Abstract
The objective of this study was to evaluate the influence of the packaging system on the useful life and post-harvest quality of lamb’s-ear leaves (Stachys byzantina L.). The sanitized sheets were packaged in four different packaging systems: (A) rigid polyethylene (PET), (B) PET together with ethylene-absorbing sachet, (C) PET wrapped with high barrier plastic film, and (D) PET together with an ethylene-absorbing sachet and wrapped with high barrier plastic film and stored at 7 ° C. Samples for physical-chemical analysis, bioactive compounds and antioxidant activity were removed before storing and at 5, 10 and 15 days of storage. The leaves contained in packages C showed less loss of mass and in system D they showed greater preservation of color attributes (L *, C * and °H). The packaging did not influence the contents of bioactive compounds, which showed higher values at 5 days of storage. The leaves stored in A, B, C and D showed high antioxidant capacity until the 15th day of storage. It was concluded that the quality atrib\utes of the lamb’s-ear leaves were kept in all packaging systems throughout 15 days of cold storage. The contents of bioactive compounds and antioxidant activity showed the highest values up to 5 days of storage at 7 ºC. Thus, considering the economic aspects and practicality in handling, packaging A is the most suitable for refrigerated storage (7 ºC) and commercialization of fresh lamb’s-ear leaves up to 15 days of storage.
Highlights
With the growing search for healthier eating habits by the population, it is necessary to introduce new foods in the diet and some that have already been part of it, but at some point have lost space in the market for other foods.Unconventional vegetables are vegetables that grow spontaneously, alone or among other crops
100 g portions of leaves were packed in four different systems: (A) rigid polyethylene terephthalate (PET) package, used for protection against mechanical damage, (B) PET package containing an ethylene absorber sachet, (C) PET package wrapped with hermetically sealed high-barrier plastic film, and (D) PET package containing an ethylene absorber sachet and wrapped with high-barrier plastic film hermetically sealed with manual sealing machine
3.1.1 Hydrogen Potential In response to storage time, the mean pH values were described by a linear model, in which the highest pH value was obtained at 15 days of storage, corresponding to 6.24 (Figure 1)
Summary
With the growing search for healthier eating habits by the population, it is necessary to introduce new foods in the diet and some that have already been part of it, but at some point have lost space in the market for other foods.Unconventional vegetables are vegetables that grow spontaneously, alone or among other crops. These plants are treated as weeds for agronomically standing outover conventional vegetables, due to their high rusticity, requiring few cultural practices along their cultivation, and higher cost-benefit ratio, meeting even the poorest classes of society thanks to its low cost of acquisition (Tomou et al, 2020; Kinupp & Lorenzi, 2014; Brasil, 2010). They are eliminated from the production field and remain unknown by the population, who neglects their food and nutritional importance. Under Brazilian conditions, it hardly blooms, so it is usually propagated vegetatively (Souza et al, 2021; Silva et al, 2021; Tomou et al, 2020; Pirbalouti & Mohammadi, 2013; MAPA, 2010)
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