Effect of Meadowsweet Flower Extract-Pullulan Coatings on Rhizopus Rot Development and Postharvest Quality of Cold-Stored Red Peppers

Molecules

Alicja Synowiec²  Małgorzata Gniewosz²  Karolina Kraśniewska²  Anna Chlebowska-Śmigiel²  Jarosᐪw L. Przybył¹  Katarzyna Bၜzek¹ 

[1] Department of Vegetable and Medicinal Plants, Warsaw University of Life Sciences-SGGW, 02-767 Warsaw, Nowoursynowska 159C, Poland;Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences-SGGW, 02-767 Warsaw, Nowoursynowska 159C, Poland

关键词: pullulan;    meadowsweet;    antifungal activity;    edible coating;    pepper;   

DOI  :  10.3390/molecules190912925

来源: mdpi

【 摘 要 】

The study involved an examination of the antifungal activity on red peppers of pullulan coating (P) and pullulan coating containing either water-ethanol (P + eEMF) or ethanol extract of meadowsweet flowers (P + eEMF). Pullulan was obtained from a culture of Aureobasidium pullulans B-1 mutant. Both non-inoculated peppers and those artificially inoculated with Rhizopus arrhizus were coated and incubated at 24 °C for 5 days. The intensity of the decay caused by Rhizopus arrhizus in the peppers with P and P + eEMF coatings was nearly 3-fold lower, and in the case of P + weEMF 5-fold lower, than that observed in the control peppers. Additionally, the P + weEMF coating decreased, almost two-fold the severity of pepper decay compared to other samples. The influence of coating of pepper postharvest quality was examined after 30 days of storage at 6 °C and 70%–75% RH. All coatings formed a thin and well-attached additional layer of an intensified gloss. During storage, color, total soluble solid content and weight loss of coated peppers were subject to lower changes in comparison with uncoated ones. The results indicate the possibility of the application of pullulan coatings containing MFEs as an alternative to the chemical fungicides used to combat pepper postharvest diseases.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.