4.7 Article

Effect of postharvest application of chitosan combined with clove oil against citrus green mold

期刊

POSTHARVEST BIOLOGY AND TECHNOLOGY
卷 99, 期 -, 页码 37-43

出版社

ELSEVIER
DOI: 10.1016/j.postharvbio.2014.07.014

关键词

Chitosan; Clove oil; Satsuma mandarin; P. digitatum; Green mold

资金

  1. National Science Foundation of China [31371860]
  2. Public Welfare Applied Research Project [2013C32094]
  3. Young Academic Leaders of Academic Climbing Project of Zhejiang Province [PD2013110]
  4. K.C. Wong Magna Fund at Ningbo University

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The antifungal activity of chitosan combined with clove oil against Penicillium digitatum, the causal agent of citrus green mold, was tested in vitro and in vivo. Chitosan combined with clove oil inhibited mycelial growth more than individual treatments, which was related to the greater release of cellular material and the largest alterations in hyphal morphology of P. digitatum. However, compared to chitosan alone, 1% chitosan coatings combined with various amounts of clove oil (0.5, 1 or 2 mL/L) showed no greater ability in controlling decay development on artificially inoculated citrus fruit. 1% chitosan combined with 0.5 mL/L clove oil appeared to slightly reduce lesion diameter and enhanced the activities of defense enzymes, including chitinase and phenylalanine ammonia-lyase at the later stages of incubation. This study indicated that the synergistic antifungal activity of chitosan-clove oil observed in in vitro studies was not found in in vivo tests. Therefore, the data suggest that a coating of 1% chitosan alone, not combined with clove oil, can effectively contribute to the control of green mold on citrus fruit. (C) 2014 Elsevier B.V. All rights reserved.

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