Structural Characterization of Oligochitosan Elicitor from Fusarium sambucinum and its Elicitation of Defensive Responses in Zanthoxylum bungeanum
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Authors
Li, Peiqin
Linhardt, Robert J.
Cao, Zhimin
Issue Date
2016-12-10
Type
Article
Language
ENG
Keywords
Biology , Chemistry and chemical biology , Chemical and biological engineering , Biomedical engineering
Alternative Title
Abstract
Oligosaccharide elicitors from pathogens have been shown to play major roles in host plant defense responses involving plant-pathogen chemoperception and interaction. In the present study, chitosan and oligochitosan were prepared from pathogen Fusarium sambucinum, and their effects on infection of Zanthoxylum bungeanum stems were investigated. Results showed that oligochitosan inhibited the infection of the pathogen, and that the oligochitosan fraction with a degree of polymerization (DP) between 5 and 6 showed the optimal effect. Oligochitosan DP5 was purified from fraction DP5-6 and was structurally characterized using electrospray ionization mass spectrometry, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectroscopy. Oligochitosan DP5 showed significant inhibition against the infection of the pathogenic fungi on host plant stems. An investigation of the mechanism underlying this effect showed that oligochitosan DP5 increased the activities of defensive enzymes and accumulation of phenolics in host Z. bungeanum. These results suggest that oligochitosan from pathogenic fungi can mediate the infection of host plants with a pathogen by acting as an elicitor that triggers the defense system of a plant. This information will be valuable for further exploration of the interactions between the pathogen F. sambucinum and host plant Z. bungeanum.
Description
International Journal of Molecular Sciences, 17, 2076
Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
Full Citation
Structural Characterization of Oligochitosan Elicitor from Fusarium sambucinum and its Elicitation of Defensive Responses in Zanthoxylum bungeanum, P. Li, R. J. Linhardt, Z. Cao International Journal of Molecular Sciences, 17, 2076, 2016.
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Terms of Use
Journal
Volume
Issue
PubMed ID
DOI
ISSN
14220067
16616596
16616596