Issue 13, 2018, Issue in Progress

Preparation of ferulic acid-grafted chitosan using recombinant bacterial laccase and its application in mango preservation

Abstract

To improve the antioxidant and antibacterial properties of chitosan, recombinant bacterial laccase from Bacillus vallismortis fmb-103 (fmb-rL103) was used to catalyze ferulic acid grafting. The grafted chitosan was characterized using UV-vis and FT-IR techniques. DPPH free radical scavenging results indicated that the antioxidant properties of the grafted chitosan (FA-g-CS) were significantly improved. Meanwhile, the antibacterial properties against E. coli, S. aureus, B. subtilis, and M. guilliermondii were also improved. Furthermore, FA-g-CS was applied to mango preservation as a coating, which improved the sensory qualities of mango Mangifera indica L. The disease incidence of mangoes coated with FA-grafted medium and high molecular weight chitosan were 0 and 5%, respectively. The respiratory peak was delayed more than 4 days, and the titratable acidity and ascorbic acid concentration were all enhanced. POD and CAT activities in FA-g-CS coated mangoes were higher than those coated with chitosan samples with a lower H2O2 concentration.

Graphical abstract: Preparation of ferulic acid-grafted chitosan using recombinant bacterial laccase and its application in mango preservation

Article information

Article type
Paper
Submitted
23 Nov 2017
Accepted
05 Feb 2018
First published
12 Feb 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 6759-6767

Preparation of ferulic acid-grafted chitosan using recombinant bacterial laccase and its application in mango preservation

J. Yang, J. Sun, X. An, M. Zheng, Z. Lu, F. Lu and C. Zhang, RSC Adv., 2018, 8, 6759 DOI: 10.1039/C7RA12696D

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