Active Package for Wild Strawberry Fruit (Fragaria vescaL.)

Abstract

An antimicrobial active package has been developed to improve the safety and quality of wild strawberries, as well as extending their shelf life. The fruits were packed in equilibrium-modified atmosphere packaging (EMAP), and the effect on Botrytis cinerea growth and on the quality parameters of the fruit by the addition of different amounts of 2-nonanone, an antifungal volatile compound naturally present in strawberries, was investigated during storage at 10 and 22 degrees C. The temperature of 10 degrees C was chosen as the temperature used at points of sale, and 22 degrees C was chosen as the control temperature. Fungal growth was inhibited in all cases, possibly due to the synergistic effect of high CO2 partial pressures and the presence of the antifungal compound. Weight, soluble solids, titrable acidity, and anthocyanin losses were retarded by the presence of 2-nonanone. This effect was more pronounced as the 2-nonanone concentration was increased at both temperatures. Therefore, an active package that releases 2-nonanone inhibits fungal decay and delays the senescence of highly perishable wild strawberry fruit.

Effect of Nano‐Packing on Preservation Quality of Fresh Strawberry (Fragaria ananassa Duch. cv Fengxiang) during Storage at 4 °C

“…Titratable acidity was the predominant organic acid in strawberry and its decrease was related to maturation. This decrease was also found when strawberry was stored with high oxygen atmosphere during 14‐d storage (Zheng and others 2007), and an active packing material (Almenar and others 2007). Ascorbic acid is one of the most abundant antioxidant present in strawberry fruit.…”

Antagonistic effects of volatiles generated by Bacillus subtilis on spore germination and hyphal growth of the plant pathogen, Botrytis cinerea

“…subtilis JA were identified by GC/MS analysis. The antifungal nature of some of the compounds, such as 2-ethyl-hexanol, 2,4-bis(2-methylpropyl)-phenol, 4-hydroxybenzaldehyde and 2-nonanone, have already been demonstrated in several pathogen systems (Fernando et al 2005, Gershon et al 1995, Wang et al 2005, Almenar et al 2007). Our results demonstrated that Bac.…”

Preserving quality of fresh-cut products using safe technologies

“…In this study, it was hypothesized that internal moisture can be the driving force that released the antimicrobial compound from the complex. Reports showed that the inclusion complexes b-cyclodextrin-hexanal (1.1 lL hexanal/L) and b-cyclodextrin-acetaldehyde (0.12 lL acetaldehyde/L) were effective against Alternaria alternata, Colletotrichum acutatum and Botrytis cinerea (Almenar et al 2007). A sachet containing different concentrations of 2-nonanone (2.5, 5 and 10 lL), volatile compounds that are naturally found in strawberry fruit, impregnated in alumina as adsorbent solid was developed, studied and finally incorporated as a part of the active packaging system.…”

“…A sachet containing different concentrations of 2-nonanone (2.5, 5 and 10 lL), volatile compounds that are naturally found in strawberry fruit, impregnated in alumina as adsorbent solid was developed, studied and finally incorporated as a part of the active packaging system. The final package increased the shelf-life of wild strawberries, delayed fungal decay and maintained the overall quality of the fruits (Almenar et al 2007). It has to be remarked that among the different kinds of active packages, headspace artifacts have been successfully used to preserve fresh products, even industrially.…”