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Disease control during peach preservation with a berberine-chitosan composite membrane

Published online by Cambridge University Press:  28 June 2012

Chunqi Yan*
Affiliation:
Coll. Life Sci. Technol., Beijing Univ. Chem. Technol., Beijing, China 100029. tianpf@mail.buct.edu.cn
Xizhen Ge
Affiliation:
Biochem. Eng. Coll., Beijing Union Univ., Beijing, China 100023
Pingfang Tian
Affiliation:
Coll. Life Sci. Technol., Beijing Univ. Chem. Technol., Beijing, China 100029. tianpf@mail.buct.edu.cn
*
*Correspondence and reprints

Abstract

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Introduction.Peach brown rot caused by the fungus Monilinia fructicola is a major disease leadingto considerable economic loss during storage. Our previous studyuncovered the striking inhibition of the natural alkaloid berberineagainst M. fructicola. Materials and methods.A berberine-chitosan composite membrane (BCCM) able to slowly releaseberberine was prepared and used for peach preservation. The examinedfruits were stored at 4 °C and treated as follows: (I) control fruits withoutpackaging; (ii) fruits that were transiently immersed in pre-solidifiedBCCM liquid and taken out; (iii) fruit coating either with a BCCM,or with a membrane containing chitosan only (without berberine),and (iv) fruit coating with a PVC membrane. Results and discussion.The group immersed in BCCM showed a high infection rate due to thecytotoxicity of acetic acid, but the coating group showed only a10% infection rate after 40 days of storage. Moreover, the BCCM-coatinggroup showed a significantly lower infection rate than that coatedwith chitosan membrane (without berberine), clearly indicating theantimicrobial activity of berberine therein. Consequently, packedin BCCM and stored at 4 °C, peach fruits could be well preservedover 40 days with very low infection. Conclusion. Consideringits safety and low cost, the berberine-containing chitosan composite membranecould be applicable in controlling diseases during peach storage.

Information

Type
Technical paper
Copyright
© 2012 Cirad/EDP Sciences