The effect and action mechanisms of oligochitosan on control of stem dry rot of Zanthoxylum bungeanum

Peiqin Li, Zhimin Cao, Zhou Wu, Xing Wang, Xiuhong Li

Research output: Contribution to journalArticlepeer-review

Abstract

In this report, the effects of two oligochitosans, i.e., oligochitosan A (OCHA) and oligochitosan B (OCHB), on control of dry rot of Zanthoxylum bungeanum (Z. bungeanum) caused by Fusarium sambucinum (F. sambucinum) were evaluated. First, both oligochitosans show desirable ability to decrease the infection of F. sambucinum. Second, the oligochitosans strongly inhibit the radial colony and submerged biomass growth of F. sambucinum. Lastly, these oligochitosans are capable of increasing the activities of phenylalanine ammonia lyase (PAL), polyphenoloxidase (PPO) and peroxidase (POD) significantly, as well as enhancing the content of total phenolics in Z. bungeanum stems. These findings indicate that the protective effects of OCHA and OCHB on Z. bungeanum stems against dry rot may be associated with the direct fungitoxic function against pathogen and the elicitation of biochemical defensive responses in Z. bungeanum stems. The outcome of this report suggests that oligochitosans may serve as a promising natural fungicide to substitute, at least partially, for synthetic fungicides in the disease management of Z. bungeanum.

Original languageEnglish (US)
Article number1044
JournalInternational Journal of Molecular Sciences
Volume17
Issue number7
DOIs
StatePublished - Jul 2016
Externally publishedYes

Keywords

  • Defensive enzyme
  • Dry rot
  • Fusarium sambucinum
  • Oligochitosan
  • Phenolics
  • Zanthoxylum bungeanum

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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